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-rw-r--r--Build/source/texk/web2c/luatexdir/luapplib/src/ppload.c2769
1 files changed, 0 insertions, 2769 deletions
diff --git a/Build/source/texk/web2c/luatexdir/luapplib/src/ppload.c b/Build/source/texk/web2c/luatexdir/luapplib/src/ppload.c
deleted file mode 100644
index 0e72039d84f..00000000000
--- a/Build/source/texk/web2c/luatexdir/luapplib/src/ppload.c
+++ /dev/null
@@ -1,2769 +0,0 @@
-
-#include "pplib.h"
-
-const char * ppobj_kind[] = { "none", "null", "bool", "integer", "number", "name", "string", "array", "dict", "stream", "ref" };
-
-#define ignored_char(c) (c == 0x20 || c == 0x0A || c == 0x0D || c == 0x09 || c == 0x00)
-#define newline_char(c) (c == 0x0A || c == 0x0D)
-#define IGNORED_CHAR_CASE 0x20: case 0x0A: case 0x0D: case 0x09: case 0x00
-#define NEWLINE_CHAR_CASE 0x0A: case 0x0D
-#define DIGIT_CHAR_CASE '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9'
-#define OCTAL_CHAR_CASE '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7'
-
-#define MAX_INT_DIGITS 32
-
-#define PP_LENGTH_UNKNOWN ((size_t)-1)
-
-static const char * ppref_str (ppuint refnumber, ppuint refversion)
-{
- static char buffer[MAX_INT_DIGITS + 1 + MAX_INT_DIGITS + 1 + 1 + 1];
- sprintf(buffer, "%lu %lu R", (unsigned long)(refnumber), (unsigned long)(refversion));
- return buffer;
-}
-
-/* name */
-
-/*
-pdf spec page 57:
-"The name may include any regular characters, but not delimiter or white-space characters (see Section 3.1, “Lexical Conventions”)."
-"The token / (a slash followed by no regular characters) is a valid name"
-"Beginning with PDF 1.2, any character except null (character code 0) may be included in a name by writing its 2-digit hexadecimal code,
-preceded by the number sign character (#); see implementation notes 3 and 4 in Appendix H. This syntax is required to represent any of the
-delimiter or white-space characters or the number sign character itself; it is recommended but not required for characters whose codes
-are outside the range 33 (!) to 126 (~)."
-
-This suggests we should accept bytes 128..255 as a part of the name.
-*/
-
-// pdf name delimiters: 0..32, ()<>[]{}/%
-// # treated specially
-// .+- are valid part of name; keep in mind names such as -| | |- .notdef ABCDEF+Font etc.
-static const int8_t ppname_byte_lookup[] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 1, 1, '#', 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
-};
-
-/*
-20190827: The end of the name is any byte with 0 lookup value. When reading a ref object or objstm stream containing
-a single name, we may get input byte IOFEOF (-1), which must not be treated as 255. So a check for (c >= 0) is needed,
-otherwise we keep writing byte 255 to the output buffer until not enough memory.
-*/
-
-#define ppnamebyte(c) (c >= 0 && ppname_byte_lookup[(uint8_t)(c)])
-
-static const int8_t pphex_byte_lookup[] = {
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1,
- -1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
-};
-
-/* no need for (c >= 0) check here */
-
-#define pphex(c) pphex_byte_lookup[(uint8_t)(c)]
-
-#define PPNAME_INIT (7 + 1)
-
-static ppname * ppscan_name (iof *I, ppheap *heap)
-{
- ppname *encoded, *decoded;
- iof *O;
- int decode, c;
- uint8_t *p, *e;
- int8_t h1, h2;
-
- O = ppbytes_buffer(heap, PPNAME_INIT);
- for (decode = 0, c = iof_char(I); ppnamebyte(c); c = iof_next(I))
- {
- if (c == '#') decode = 1;
- iof_put(O, c);
- }
- encoded = (ppname *)ppstruct_take(heap, sizeof(ppname));
- encoded->data = ppbytes_flush(heap, O, &encoded->size);
- if (decode)
- {
- O = ppbytes_buffer(heap, encoded->size); // decoded always a bit smaller
- for (p = (uint8_t *)encoded->data, e = p + encoded->size; p < e; ++p)
- {
- if (*p == '#' && p + 2 < e && (h1 = pphex(p[1])) >= 0 && (h2 = pphex(p[2])) >= 0)
- {
- iof_set(O, ((h1 << 4)|h2));
- p += 2;
- }
- else
- iof_set(O, *p);
- }
- decoded = (ppname *)ppstruct_take(heap, sizeof(ppname));
- decoded->data = ppbytes_flush(heap, O, &decoded->size);
- encoded->flags = PPNAME_ENCODED;
- decoded->flags = PPNAME_DECODED;
- encoded->alterego = decoded, decoded->alterego = encoded;
- }
- else
- {
- encoded->flags = 0;
- encoded->alterego = encoded;
- }
- return encoded;
-}
-
-static ppname * ppscan_exec (iof *I, ppheap *heap, uint8_t firstbyte)
-{
- ppname *encoded, *decoded;
- iof *O;
- int decode, c;
- uint8_t *p, *e;
- int8_t h1, h2;
-
- O = ppbytes_buffer(heap, PPNAME_INIT);
- iof_put(O, firstbyte);
- for (decode = 0, c = iof_char(I); ppnamebyte(c); c = iof_next(I))
- {
- if (c == '#') decode = 1;
- iof_put(O, c);
- }
- encoded = (ppname *)ppstruct_take(heap, sizeof(ppname));
- encoded->data = ppbytes_flush(heap, O, &encoded->size);
- if (decode)
- {
- O = ppbytes_buffer(heap, encoded->size);
- for (p = (uint8_t *)encoded->data, e = p + encoded->size; p < e; ++p)
- {
- if (*p == '#' && p + 2 < e && (h1 = pphex(p[1])) >= 0 && (h2 = pphex(p[2])) >= 0)
- {
- iof_set(O, ((h1 << 4)|h2));
- p += 2;
- }
- else
- iof_set(O, *p);
- }
- decoded = (ppname *)ppstruct_take(heap, sizeof(ppname));
- decoded->data = ppbytes_flush(heap, O, &decoded->size);
- encoded->flags = PPNAME_EXEC|PPNAME_ENCODED;
- decoded->flags = PPNAME_EXEC|PPNAME_DECODED;
- encoded->alterego = decoded, decoded->alterego = encoded;
- }
- else
- {
- encoded->flags = PPNAME_EXEC;
- encoded->alterego = encoded;
- }
- return encoded;
-}
-
-static ppname * ppname_internal (const void *data, size_t size, int flags, ppheap *heap)
-{ // so far needed only for 'EI' operator
- ppname *encoded;
- encoded = (ppname *)ppstruct_take(heap, sizeof(ppname));
- encoded->data = (ppbyte *)ppbytes_take(heap, size + 1);
- memcpy(encoded->data, data, size);
- encoded->data[size] = '\0';
- encoded->size = size;
- encoded->alterego = encoded;
- encoded->flags = flags;
- return encoded;
-}
-
-#define ppexec_internal(data, size, heap) ppname_internal(data, size, PPNAME_EXEC, heap)
-
-ppname * ppname_decoded (ppname *name)
-{
- return (name->flags & PPNAME_ENCODED) ? name->alterego : name;
-}
-
-ppname * ppname_encoded (ppname *name)
-{
- return (name->flags & PPNAME_DECODED) ? name->alterego : name;
-}
-
-ppbyte * ppname_decoded_data (ppname *name)
-{
- return (name->flags & PPNAME_ENCODED) ? name->alterego->data : name->data;
-}
-
-ppbyte * ppname_encoded_data (ppname *name)
-{
- return (name->flags & PPNAME_DECODED) ? name->alterego->data : name->data;
-}
-
-/* string */
-
-static const int8_t ppstring_byte_escape[] = { /* -1 escaped with octal, >0 escaped with \\, 0 left intact*/
- -1,-1,-1,-1,-1,-1,-1,-1,'b','t','n',-1,'f','r',-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- 0, 0, 0, 0, 0, 0, 0, 0,'(',')', 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,'\\', 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
-};
-
-//// pp string
-
-#define PPSTRING_INIT (7 + 1)
-
-#define ppstring_check_bom(decoded) ((void)\
- (decoded->size >= 2 ? (ppstring_utf16be_bom(decoded->data) ? (decoded->flags |= PPSTRING_UTF16BE) : \
- (ppstring_utf16le_bom(decoded->data) ? (decoded->flags |= PPSTRING_UTF16LE) : 0)) : 0))
-
-#define ppstring_check_bom2(decoded, encoded) ((void)\
- (decoded->size >= 2 ? (ppstring_utf16be_bom(decoded->data) ? ((decoded->flags |= PPSTRING_UTF16BE), (encoded->flags |= PPSTRING_UTF16BE)) : \
- (ppstring_utf16le_bom(decoded->data) ? ((decoded->flags |= PPSTRING_UTF16LE), (encoded->flags |= PPSTRING_UTF16LE)) : 0)) : 0))
-
-#define ppstring_utf16be_bom(data) (data[0] == '\xFE' && data[1] == '\xFF')
-#define ppstring_utf16le_bom(data) (data[0] == '\xFF' && data[1] == '\xFE')
-
-#define ppstringesc(c) ppstring_byte_escape[(uint8_t)(c)]
-
-static ppstring * ppscan_string (iof *I, ppheap *heap)
-{
- ppstring *encoded, *decoded;
- iof *O;
- int c, decode, balance;
- uint8_t *p, *e;
-
- O = ppbytes_buffer(heap, PPSTRING_INIT);
- for (decode = 0, balance = 0, c = iof_char(I); c >= 0; )
- {
- switch (c)
- {
- case '\\':
- decode = 1;
- iof_put(O, '\\');
- if ((c = iof_next(I)) >= 0)
- {
- iof_put(O, c);
- c = iof_next(I);
- }
- break;
- case '(': // may be unescaped if balanced
- ++balance;
- iof_put(O, '(');
- c = iof_next(I);
- break;
- case ')':
- if (balance == 0)
- {
- c = IOFEOF;
- ++I->pos;
- break;
- }
- --balance;
- iof_put(O, ')');
- c = iof_next(I);
- break;
- default:
- iof_put(O, c);
- c = iof_next(I);
- }
- }
- encoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- encoded->data = ppbytes_flush(heap, O, &encoded->size);
- if (decode)
- {
- O = ppbytes_buffer(heap, encoded->size); // decoded can only be smaller
- for (p = (uint8_t *)encoded->data, e = p + encoded->size; p < e; ++p)
- {
- if (*p == '\\')
- {
- if (++p >= e)
- break;
- switch (*p)
- {
- case OCTAL_CHAR_CASE:
- c = *p - '0';
- if (++p < e && *p >= '0' && *p <= '7')
- {
- c = (c << 3) + *p - '0';
- if (++p < e && *p >= '0' && *p <= '7')
- c = (c << 3) + *p - '0';
- }
- iof_set(O, c);
- break;
- case 'n':
- iof_set(O, '\n');
- break;
- case 'r':
- iof_set(O, '\r');
- break;
- case 't':
- iof_set(O, '\t');
- break;
- case 'b':
- iof_set(O, '\b');
- break;
- case 'f':
- iof_set(O, '\f');
- break;
- case NEWLINE_CHAR_CASE: // not a part of the string, ignore (pdf spec page 55)
- break;
- case '(': case ')': case '\\':
- default: // for anything else backslash is ignored (pdf spec page 54)
- iof_set(O, *p);
- break;
- }
- }
- else
- iof_set(O, *p);
- }
- decoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- decoded->data = ppbytes_flush(heap, O, &decoded->size);
- encoded->flags = PPSTRING_ENCODED;
- decoded->flags = PPSTRING_DECODED;
- encoded->alterego = decoded, decoded->alterego = encoded;
- ppstring_check_bom2(decoded, encoded);
- }
- else
- {
- encoded->flags = 0;
- encoded->alterego = encoded;
- ppstring_check_bom(encoded);
- }
- return encoded;
-}
-
-static ppstring * ppscan_base16 (iof *I, ppheap *heap)
-{
- ppstring *encoded, *decoded;
- iof *O;
- int c;
- uint8_t *p, *e;
- int8_t h1, h2;
-
- O = ppbytes_buffer(heap, PPSTRING_INIT);
- for (c = iof_char(I); (pphex(c) >= 0 || ignored_char(c)); c = iof_next(I))
- iof_put(O, c);
- if (c == '>')
- ++I->pos;
- encoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- encoded->data = ppbytes_flush(heap, O, &encoded->size);
-
- O = ppbytes_buffer(heap, ((encoded->size + 1) >> 1) + 1); // decoded can only be smaller
- for (p = (uint8_t *)encoded->data, e = p + encoded->size; p < e; ++p)
- {
- if ((h1 = pphex(*p)) < 0) // ignored
- continue;
- for (h2 = 0, ++p; p < e && (h2 = pphex(*p)) < 0; ++p);
- iof_set(O, (h1 << 4)|h2);
- }
- decoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- decoded->data = ppbytes_flush(heap, O, &decoded->size);
-
- encoded->flags = PPSTRING_BASE16|PPSTRING_ENCODED;
- decoded->flags = PPSTRING_BASE16|PPSTRING_DECODED;
- encoded->alterego = decoded, decoded->alterego = encoded;
-
- ppstring_check_bom2(decoded, encoded);
- return encoded;
-}
-
-static ppstring * ppstring_buffer (iof *O, ppheap *heap)
-{
- ppstring *encoded, *decoded;
- uint8_t *p, *e;
-
- decoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- decoded->data = ppbytes_flush(heap, O, &decoded->size);
-
- O = ppbytes_buffer(heap, (decoded->size << 1) + 1); // the exact size known
- for (p = (uint8_t *)decoded->data, e = p + decoded->size; p < e; ++p)
- iof_set2(O, base16_uc_alphabet[(*p) >> 4], base16_uc_alphabet[(*p) & 0xF]);
- encoded = ppstruct_take(heap, sizeof(ppstring));
- encoded->data = ppbytes_flush(heap, O, &encoded->size);
- encoded->flags = PPSTRING_BASE16|PPSTRING_ENCODED;
- decoded->flags = PPSTRING_BASE16|PPSTRING_DECODED;
- encoded->alterego = decoded, decoded->alterego = encoded;
- // ppstring_check_bom2(decoded, encoded); // ?
- return encoded;
-}
-
-ppstring * ppstring_internal (const void *data, size_t size, ppheap *heap)
-{ // so far used only for crypt key
- iof *O;
- O = ppbytes_buffer(heap, size);
- memcpy(O->buf, data, size);
- O->pos = O->buf + size;
- return ppstring_buffer(O, heap);
-}
-
-/* base85; local function for that to make that part independent from utilbasexx */
-
-static const int8_t ppstring_base85_lookup[] = {
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,
- 15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,
- 31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,
- 47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,
- 63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,
- 79,80,81,82,83,84,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
-};
-
-#define base85_value(c) ppstring_base85_lookup[(uint8_t)(c)]
-
-#define base85_code(c1, c2, c3, c4, c5) ((((c1 * 85 + c2) * 85 + c3) * 85 + c4) * 85 + c5)
-#define base85_eof(c) (c == '~' || c < 0)
-
-static iof_status ppscan_base85_decode (iof *I, iof *O)
-{
- int c1, c2, c3, c4, c5;
- uint32_t code;
- while (iof_ensure(O, 4))
- {
- do { c1 = iof_get(I); } while (ignored_char(c1));
- if (base85_eof(c1))
- return IOFEOF;
- switch (c1)
- {
- case 'z':
- iof_set4(O, '\0', '\0', '\0', '\0');
- continue;
- case 'y':
- iof_set4(O, ' ', ' ', ' ', ' ');
- continue;
- }
- do { c2 = iof_get(I); } while (ignored_char(c2));
- if (base85_eof(c2))
- return IOFERR;
- do { c3 = iof_get(I); } while (ignored_char(c3));
- if (base85_eof(c3))
- {
- if ((c1 = base85_value(c1)) < 0 || (c2 = base85_value(c2)) < 0)
- return IOFERR;
- code = base85_code(c1, c2, 84, 84, 84); /* padding with 'u' (117); 117-33 = 84 */
- iof_set(O, (code >> 24));
- return IOFEOF;
- }
- do { c4 = iof_get(I); } while (ignored_char(c4));
- if (base85_eof(c4))
- {
- if ((c1 = base85_value(c1)) < 0 || (c2 = base85_value(c2)) < 0 || (c3 = base85_value(c3)) < 0)
- return IOFERR;
- code = base85_code(c1, c2, c3, 84, 84);
- iof_set2(O, code>>24, ((code>>16) & 0xff));
- return IOFEOF;
- }
- do { c5 = iof_get(I); } while (ignored_char(c5));
- if (base85_eof(c5))
- {
- if ((c1 = base85_value(c1)) < 0 || (c2 = base85_value(c2)) < 0 ||
- (c3 = base85_value(c3)) < 0 || (c4 = base85_value(c4)) < 0)
- return IOFERR;
- code = base85_code(c1, c2, c3, c4, 84);
- iof_set3(O, (code >> 24), ((code >> 16) & 0xff), ((code >> 8) & 0xff));
- return IOFEOF;
- }
- if ((c1 = base85_value(c1)) < 0 || (c2 = base85_value(c2)) < 0 || (c3 = base85_value(c3)) < 0 ||
- (c4 = base85_value(c4)) < 0 || (c5 = base85_value(c5)) < 0)
- return IOFERR;
- code = base85_code(c1, c2, c3, c4, c5);
- iof_set4(O, (code >> 24), ((code >> 16) & 0xff), ((code >> 8) & 0xff), (code & 0xff));
- }
- return IOFFULL;
-}
-
-static ppstring * ppscan_base85 (iof *I, ppheap *heap)
-{ // base85 alphabet is 33..117, adobe also hires 'z' and 'y' for compression
- ppstring *encoded, *decoded;
- iof *O, B;
- int c;
-
- O = ppbytes_buffer(heap, PPSTRING_INIT);
- for (c = iof_char(I); (c >= '!' && c <= 'u') || c == 'z' || c == 'y'; c = iof_next(I))
- iof_put(O, c);
- if (c == '~')
- if ((c = iof_next(I)) == '>')
- ++I->pos;
- encoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- encoded->data = ppbytes_flush(heap, O, &encoded->size);
-
- iof_string_reader(&B, encoded->data, encoded->size);
- O = ppbytes_buffer(heap, (encoded->size * 5 / 4) + 1); // may be larger that that because of 'z' and 'y'
- ppscan_base85_decode(&B, O);
- decoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- decoded->data = ppbytes_flush(heap, O, &decoded->size);
-
- encoded->flags = PPSTRING_BASE85|PPSTRING_ENCODED;
- decoded->flags = PPSTRING_BASE85|PPSTRING_DECODED;
- encoded->alterego = decoded, decoded->alterego = encoded;
-
- ppstring_check_bom2(decoded, encoded);
- return encoded;
-}
-
-ppstring * ppstring_decoded (ppstring *string)
-{
- return (string->flags & PPSTRING_ENCODED) ? string->alterego : string;
-}
-
-ppstring * ppstring_encoded (ppstring *string)
-{
- return (string->flags & PPSTRING_DECODED) ? string->alterego : string;
-}
-
-ppbyte * ppstring_decoded_data (ppstring *string)
-{
- return (string->flags & PPSTRING_ENCODED) ? string->alterego->data : string->data;
-}
-
-ppbyte * ppstring_encoded_data (ppstring *string)
-{
- return (string->flags & PPSTRING_DECODED) ? string->alterego->data : string->data;
-}
-
-
-/* encrypted string */
-
-static ppstring * ppscan_crypt_string (iof *I, ppcrypt *crypt, ppheap *heap)
-{
- ppstring *encoded, *decoded;
- iof *O;
- int c, b, balance, encode;
- uint8_t *p, *e;
- size_t size;
-
- O = ppbytes_buffer(heap, PPSTRING_INIT);
- for (balance = 0, encode = 0, c = iof_char(I); c >= 0; )
- {
- switch (c)
- {
- case '\\':
- if ((c = iof_next(I)) < 0)
- break;
- encode = 1;
- switch (c)
- {
- case OCTAL_CHAR_CASE:
- b = c - '0';
- if ((c = iof_next(I)) >= 0 && c >= '0' && c <= '7')
- {
- b = (b << 3) + c - '0';
- if ((c = iof_next(I)) >= 0 && c >= '0' && c <= '7')
- {
- b = (b << 3) + c - '0';
- c = iof_next(I);
- }
- }
- iof_put(O, b);
- // c is set to the next char
- break;
- case 'n':
- iof_put(O, '\n');
- c = iof_next(I);
- break;
- case 'r':
- iof_put(O, '\r');
- c = iof_next(I);
- break;
- case 't':
- iof_put(O, '\t');
- c = iof_next(I);
- break;
- case 'b':
- iof_put(O, '\b');
- c = iof_next(I);
- break;
- case 'f':
- iof_put(O, '\f');
- c = iof_next(I);
- break;
- case NEWLINE_CHAR_CASE: // not a part of the string, ignore (pdf spec page 55)
- c = iof_next(I);
- break;
- case '(': case ')': case '\\':
- default: // for enything else backslash is ignored (pdf spec page 54)
- iof_put(O, c);
- c = iof_next(I);
- break;
- }
- break;
- case '(':
- ++balance;
- encode = 1;
- iof_put(O, '(');
- c = iof_next(I);
- break;
- case ')':
- if (balance == 0)
- {
- c = IOFEOF;
- ++I->pos;
- }
- else
- {
- --balance;
- //encode = 1;
- iof_put(O, ')');
- c = iof_next(I);
- }
- break;
- default:
- if (ppstringesc(c) != 0)
- encode = 1;
- iof_put(O, c);
- c = iof_next(I);
- }
- }
- /* decrypt the buffer in place, update size */
- if (ppstring_decrypt(crypt, O->buf, iof_size(O), O->buf, &size))
- O->pos = O->buf + size;
- decoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- decoded->data = ppbytes_flush(heap, O, &decoded->size);
- /* make encoded counterpart */
- if (encode)
- {
- O = ppbytes_buffer(heap, decoded->size + 1); // we don't know
- for (p = (uint8_t *)decoded->data, e = p + decoded->size; p < e; ++p)
- {
- b = ppstringesc(*p);
- switch (b)
- {
- case 0:
- iof_put(O, *p);
- break;
- case -1:
- iof_put4(O, '\\', ((*p) >> 6) + '0', (((*p) >> 3) & 7) + '0', ((*p) & 7) + '0');
- break;
- default:
- iof_put2(O, '\\', b);
- break;
- }
- }
- encoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- encoded->data = ppbytes_flush(heap, O, &encoded->size);
- encoded->flags = PPSTRING_ENCODED;
- decoded->flags = PPSTRING_DECODED;
- encoded->alterego = decoded, decoded->alterego = encoded;
- ppstring_check_bom2(decoded, encoded);
- }
- else
- {
- decoded->flags = 0;
- decoded->alterego = decoded;
- ppstring_check_bom(decoded);
- encoded = decoded;
- }
- return encoded;
-}
-
-static ppstring * ppscan_crypt_base16 (iof *I, ppcrypt *crypt, ppheap *heap)
-{
- ppstring *encoded, *decoded;
- iof *O;
- int c;
- uint8_t *p, *e;
- int8_t h1, h2;
- size_t size;
-
- O = ppbytes_buffer(heap, PPSTRING_INIT);
- for (c = iof_char(I); c != '>'; )
- {
- if ((h1 = pphex(c)) < 0)
- {
- if (ignored_char(c))
- {
- c = iof_next(I);
- continue;
- }
- break;
- }
- do {
- c = iof_next(I);
- if ((h2 = pphex(c)) >= 0)
- {
- c = iof_next(I);
- break;
- }
- if (!ignored_char(c)) // c == '>' || c < 0 or some crap
- {
- h2 = 0;
- break;
- }
- } while (1);
- iof_put(O, (h1 << 4)|h2);
- }
- if (c == '>')
- ++I->pos;
- /* decrypt the buffer in place, update size */
- if (ppstring_decrypt(crypt, O->buf, iof_size(O), O->buf, &size))
- O->pos = O->buf + size;
- decoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- decoded->data = ppbytes_flush(heap, O, &decoded->size);
-
- O = ppbytes_buffer(heap, (decoded->size << 1) + 1);
- for (p = (uint8_t *)decoded->data, e = p + decoded->size; p < e; ++p)
- iof_set2(O, base16_uc_alphabet[(*p) >> 4], base16_uc_alphabet[(*p) & 0xF]);
- encoded = (ppstring *)ppstruct_take(heap, sizeof(ppstring));
- encoded->data = ppbytes_flush(heap, O, &encoded->size);
-
- encoded->flags = PPSTRING_BASE16|PPSTRING_ENCODED;
- decoded->flags = PPSTRING_BASE16|PPSTRING_DECODED;
- encoded->alterego = decoded, decoded->alterego = encoded;
-
- ppstring_check_bom2(decoded, encoded);
- return encoded;
-}
-
-/* scanner stack */
-
-#define PPSTACK_BUFFER 512
-
-static void ppstack_init (ppstack *stack, ppheap *heap)
-{
- stack->buf = stack->pos = (ppobj *)pp_malloc(PPSTACK_BUFFER * sizeof(ppobj));
- stack->size = 0;
- stack->space = PPSTACK_BUFFER;
- stack->heap = heap;
-}
-
-#define ppstack_free_buffer(stack) (pp_free((stack)->buf))
-
-static void ppstack_resize (ppstack *stack)
-{
- ppobj *newbuffer;
- stack->space <<= 1;
- newbuffer = (ppobj *)pp_malloc(stack->space * sizeof(ppobj));
- memcpy(newbuffer, stack->buf, stack->size * sizeof(ppobj));
- ppstack_free_buffer(stack);
- stack->buf = newbuffer;
- stack->pos = newbuffer + stack->size;
-}
-
-#define ppstack_push(stack) ((void)((stack)->size < (stack)->space || (ppstack_resize(stack), 0)), ++(stack)->size, (stack)->pos++)
-#define ppstack_pop(stack, n) ((stack)->size -= (n), (stack)->pos -= (n))
-#define ppstack_at(stack, i) ((stack)->buf + i)
-#define ppstack_clear(stack) ((stack)->pos = (stack)->buf, (stack)->size = 0)
-
-/* scanner commons */
-
-#define ppscan_uint(I, u) iof_get_usize(I, u)
-#define ppread_uint(s, u) string_to_usize((const char *)(s), u)
-
-static ppobj * ppscan_numobj (iof *I, ppobj *obj, int negative)
-{
- ppint integer;
- ppnum number;
- int exponent;
- int c;
- c = iof_char(I);
- iof_scan_integer(I, c, integer);
- switch(c)
- {
- case '.':
- {
- number = (ppnum)integer;
- c = iof_next(I);
- iof_scan_fraction(I, c, number, exponent);
- double_negative_exp10(number, exponent);
- obj->type = PPNUM, obj->number = negative ? -number : number;
- break;
- }
- default:
- obj->type = PPINT, obj->integer = negative ? -integer : integer;
- break;
- }
- return obj;
-}
-
-static ppobj * ppscan_numobj_frac (iof *I, ppobj *obj, int negative)
-{
- ppnum number;
- int c, exponent;
-
- number = 0.0;
- c = iof_next(I);
- iof_scan_fraction(I, c, number, exponent);
- double_negative_exp10(number, exponent);
- obj->type = PPNUM, obj->number = negative ? -number : number;
- return obj;
-}
-
-static int ppscan_find (iof *I)
-{ // skips whitechars and comments
- int c;
- for (c = iof_char(I); ; c = iof_next(I))
- {
- switch (c)
- {
- case IGNORED_CHAR_CASE:
- break;
- case '%': {
- do {
- if ((c = iof_next(I)) < 0)
- return c;
- } while (!newline_char(c));
- break;
- }
- default:
- return c;
- }
- }
- return c; // never reached
-}
-
-static int ppscan_keyword (iof *I, const char *keyword, size_t size)
-{
- size_t i;
- int c;
- if ((size_t)iof_left(I) >= size)
- {
- if (memcmp(I->pos, keyword, size) != 0)
- return 0;
- I->pos += size;
- return 1;
- }
- // sticky case, we can't go back
- for (i = 0, c = iof_char(I); i < size; ++i, ++keyword, c = iof_next(I))
- if (c < 0 || *keyword != c) /* PJ20190503 bugfix: there was (i!=c), we actually never get here anyway */
- return 0;
- return 1;
-}
-
-#define ppscan_key(I, literal) ppscan_keyword(I, "" literal, sizeof(literal) - 1)
-
-/* objects parser */
-
-static ppref * ppref_unresolved (ppheap *heap, ppuint refnumber, ppuint refversion)
-{
- ppref *ref = (ppref *)ppstruct_take(heap, sizeof(ppref));
- memset(ref, 0, sizeof(ppref));
- ref->object.type = PPNONE;
- ref->number = refnumber;
- ref->version = refversion;
- return ref;
-}
-
-#define PPMARK PPNONE
-
-static ppobj * ppscan_obj (iof *I, ppdoc *pdf, ppxref *xref)
-{
- int c;
- ppobj *obj;
- size_t mark, size;
- ppuint refnumber, refversion;
- ppref *ref;
- ppstack *stack;
- ppcrypt *crypt;
-
- stack = &pdf->stack;
- c = iof_char(I);
- switch (c)
- {
- case DIGIT_CHAR_CASE:
- return ppscan_numobj(I, ppstack_push(stack), 0);
- case '.':
- return ppscan_numobj_frac(I, ppstack_push(stack), 0);
- case '+':
- ++I->pos;
- return ppscan_numobj(I, ppstack_push(stack), 0);
- case '-':
- ++I->pos;
- return ppscan_numobj(I, ppstack_push(stack), 1);
- case '/':
- ++I->pos;
- obj = ppstack_push(stack);
- obj->type = PPNAME;
- obj->name = ppscan_name(I, &pdf->heap);
- return obj;
- case '(':
- ++I->pos;
- obj = ppstack_push(stack);
- obj->type = PPSTRING;
- if (ppcrypt_ref(pdf, crypt))
- obj->string = ppscan_crypt_string(I, crypt, &pdf->heap);
- else
- obj->string = ppscan_string(I, &pdf->heap);
- return obj;
- case '[':
- mark = stack->size;
- obj = ppstack_push(stack);
- obj->type = PPMARK; // ppscan_obj() checks types backward for 'R', so set the type immediatelly (reserved for PPARRAY)
- obj->any = NULL;
- ++I->pos;
- for (c = ppscan_find(I); c != ']'; c = ppscan_find(I))
- {
- if (ppscan_obj(I, pdf, xref) == NULL)
- { // callers assume that NULL returns means nothing pushed
- size = stack->size - mark; // pop items AND the obj reserved for array
- ppstack_pop(stack, size);
- return NULL;
- }
- }
- ++I->pos;
- size = stack->size - mark - 1;
- obj = ppstack_at(stack, mark); // stack might have been realocated
- obj->type = PPARRAY;
- obj->array = pparray_create(ppstack_at(stack, mark + 1), size, &pdf->heap);
- ppstack_pop(stack, size); // pop array items, leave the array on top
- return obj;
- case '<':
- if ((c = iof_next(I)) == '<')
- {
- mark = stack->size;
- obj = ppstack_push(stack);
- obj->type = PPMARK;
- obj->any = NULL;
- ++I->pos;
- for (c = ppscan_find(I); c != '>'; c = ppscan_find(I))
- {
- if (ppscan_obj(I, pdf, xref) == NULL)
- {
- size = stack->size - mark;
- ppstack_pop(stack, size);
- return NULL;
- }
- }
- if (iof_next(I) == '>')
- ++I->pos;
- size = stack->size - mark - 1;
- obj = ppstack_at(stack, mark);
- obj->type = PPDICT;
- obj->dict = ppdict_create(ppstack_at(stack, mark + 1), size, &pdf->heap);
- ppstack_pop(stack, size);
- return obj;
- }
- obj = ppstack_push(stack);
- obj->type = PPSTRING;
- if (ppcrypt_ref(pdf, crypt))
- obj->string = ppscan_crypt_base16(I, crypt, &pdf->heap);
- else
- obj->string = ppscan_base16(I, &pdf->heap);
- return obj;
- case 'R':
- if (stack->size >= 2 && stack->pos[-1].type == PPINT && stack->pos[-2].type == PPINT)
- {
- ++I->pos;
- obj = &stack->pos[-2];
- refnumber = (ppuint)obj->integer;
- ppstack_pop(stack, 1); // pop version number, retype obj to a reference
- if (xref == NULL || (ref = ppxref_find(xref, refnumber)) == NULL)
- { /* pdf spec page 64: unresolvable reference is not an error, should just be treated as a reference to null.
- we also need this to read trailer, where refs can't be resolved yet */
- refversion = (obj + 1)->integer;
- //if (xref != NULL)
- // loggerf("unresolved reference %s", ppref_str(refnumber, refversion));
- ref = ppref_unresolved(stack->heap, refnumber, refversion);
- }
- obj->type = PPREF;
- obj->ref = ref;
- return obj;
- }
- break;
- case 't':
- if (iof_next(I) == 'r' && iof_next(I) == 'u' && iof_next(I) == 'e')
- {
- ++I->pos;
- obj = ppstack_push(stack);
- obj->type = PPBOOL;
- obj->integer = 1;
- return obj;
- }
- break;
- case 'f':
- if (iof_next(I) == 'a' && iof_next(I) == 'l' && iof_next(I) == 's' && iof_next(I) == 'e')
- {
- ++I->pos;
- obj = ppstack_push(stack);
- obj->type = PPBOOL;
- obj->integer = 0;
- return obj;
- }
- break;
- case 'n':
- if (iof_next(I) == 'u' && iof_next(I) == 'l' && iof_next(I) == 'l')
- {
- ++I->pos;
- obj = ppstack_push(stack);
- obj->type = PPNULL;
- obj->any = NULL;
- return obj;
- }
- break;
- }
- return NULL;
-}
-
-/*
-A variant for contents streams (aka postscript); wise of operators, blind to references.
-We are still PDF, so we don't care about postscript specific stuff such as radix numbers
-and scientific numbers notation. It takes ppstack * as context (no ppdoc *) to be able
-to run contents parser beyond the scope of ppdoc heap.
-*/
-
-static ppstring * ppstring_inline (iof *I, ppdict *imagedict, ppheap *heap);
-
-static ppobj * ppscan_psobj (iof *I, ppstack *stack)
-{
- int c;
- ppobj *obj, *op;
- size_t size, mark;
- ppname *exec;
- ppbyte *data;
-
- c = iof_char(I);
- switch (c)
- {
- case DIGIT_CHAR_CASE:
- return ppscan_numobj(I, ppstack_push(stack), 0);
- case '.':
- return ppscan_numobj_frac(I, ppstack_push(stack), 0);
- case '+':
- c = iof_next(I);
- if (base10_digit(c)) // '+.abc' is probably an executable name, but we are not in postscript
- return ppscan_numobj(I, ppstack_push(stack), 0);
- else if (c == '.')
- return ppscan_numobj_frac(I, ppstack_push(stack), 0);
- obj = ppstack_push(stack);
- obj->type = PPNAME;
- obj->name = ppscan_exec(I, stack->heap, '+');
- return obj;
- case '-':
- c = iof_next(I);
- if (base10_digit(c)) // ditto, we would handle type1 '-|' '|-' operators though
- return ppscan_numobj(I, ppstack_push(stack), 1);
- else if (c == '.')
- return ppscan_numobj_frac(I, ppstack_push(stack), 1);
- obj = ppstack_push(stack);
- obj->type = PPNAME;
- obj->name = ppscan_exec(I, stack->heap, '-');
- return obj;
- case '/':
- ++I->pos;
- obj = ppstack_push(stack);
- obj->type = PPNAME;
- obj->name = ppscan_name(I, stack->heap);
- return obj;
- case '(':
- ++I->pos;
- obj = ppstack_push(stack);
- obj->type = PPSTRING;
- obj->string = ppscan_string(I, stack->heap);
- return obj;
- case '[':
- mark = stack->size;
- obj = ppstack_push(stack);
- obj->type = PPMARK;
- obj->any = NULL;
- ++I->pos;
- for (c = ppscan_find(I); c != ']'; c = ppscan_find(I))
- {
- if (ppscan_psobj(I, stack) == NULL)
- {
- size = stack->size - mark;
- ppstack_pop(stack, size);
- return NULL;
- }
- }
- ++I->pos;
- size = stack->size - mark - 1;
- obj = ppstack_at(stack, mark);
- obj->type = PPARRAY;
- obj->array = pparray_create(ppstack_at(stack, mark + 1), size, stack->heap);
- ppstack_pop(stack, size);
- return obj;
- case '<':
- if ((c = iof_next(I)) == '<')
- {
- mark = stack->size;
- obj = ppstack_push(stack);
- obj->type = PPMARK;
- obj->any = NULL;
- ++I->pos;
- for (c = ppscan_find(I); c != '>'; c = ppscan_find(I))
- {
- if (ppscan_psobj(I, stack) == NULL)
- {
- size = stack->size - mark;
- ppstack_pop(stack, size);
- return NULL;
- }
- }
- if (iof_next(I) == '>')
- ++I->pos;
- size = stack->size - mark - 1;
- obj = ppstack_at(stack, mark);
- obj->type = PPDICT;
- obj->dict = ppdict_create(ppstack_at(stack, mark + 1), size, stack->heap);
- ppstack_pop(stack, size);
- return obj;
- }
- obj = ppstack_push(stack);
- obj->type = PPSTRING;
- if (c == '~')
- ++I->pos, obj->string = ppscan_base85(I, stack->heap);
- else
- obj->string = ppscan_base16(I, stack->heap);
- return obj;
- default:
- if (!ppnamebyte(c))
- break; // forbid empty names; dead loop otherwise
- ++I->pos;
- /* true false null practically don't occur in streams so it makes sense to assume that we get an operator name here.
- If it happen to be a keyword we could give back those several bytes to the heap but.. heap buffer is tricky enough. */
- exec = ppscan_exec(I, stack->heap, (uint8_t)c);
- data = exec->data;
- obj = ppstack_push(stack);
- switch (data[0])
- {
- case 't':
- if (data[1] == 'r' && data[2] == 'u' && data[3] == 'e' && data[4] == '\0')
- {
- obj->type = PPBOOL;
- obj->integer = 1;
- return obj;
- }
- break;
- case 'f':
- if (data[1] == 'a' && data[2] == 'l' && data[3] == 's' && data[4] == 'e' && data[5] == '\0')
- {
- obj->type = PPBOOL;
- obj->integer = 0;
- return obj;
- }
- break;
- case 'n':
- if (data[1] == 'u' && data[2] == 'l' && data[3] == 'l' && data[4] == '\0')
- {
- obj->type = PPNULL;
- obj->any = NULL;
- return obj;
- }
- break;
- case 'B':
- /*
- Inline images break rules of operand/operator syntax, so 'BI/ID' operators need to be treated as special syntactic keywords.
-
- BI <keyval pairs> ID<whitechar?><imagedata><whitechar?>EI
-
- We treat the image as a single syntactic token; BI starts collecting a dict, ID is the beginning of the data. Effectively EI
- operator obtains two operands - dict and string. It is ok to put three items onto the stack, callers dont't assume there is just one.
- */
- if (data[1] == 'I' && data[2] == '\0')
- {
- ppdict *imagedict;
- ppname *name;
- /* key val pairs -> dict */
- mark = stack->size - 1;
- obj->type = PPMARK;
- obj->any = NULL;
- for (c = ppscan_find(I); ; c = ppscan_find(I))
- {
- if ((op = ppscan_psobj(I, stack)) == NULL)
- {
- size = stack->size - mark;
- ppstack_pop(stack, size);
- return NULL;
- }
- if (op->type == PPNAME)
- {
- name = op->name;
- if (name->flags & PPNAME_EXEC)
- {
- if (name->size != 2 || name->data[0] != 'I' || name->data[1] != 'D')
- { // weird
- size = stack->size - mark;
- ppstack_pop(stack, size);
- return NULL;
- }
- break;
- }
- }
- }
- size = stack->size - mark - 1;
- obj = ppstack_at(stack, mark);
- obj->type = PPDICT;
- obj->dict = imagedict = ppdict_create(ppstack_at(stack, mark + 1), size, stack->heap);
- ppstack_pop(stack, size);
- /* put image data string */
- obj = ppstack_push(stack);
- obj->type = PPSTRING;
- obj->string = ppstring_inline(I, imagedict, stack->heap);;
- /* put EI operator name */
- obj = ppstack_push(stack);
- obj->type = PPNAME;
- obj->name = ppexec_internal("EI", 2, stack->heap);
- return obj;
- }
- break;
- }
- obj->type = PPNAME;
- obj->name = exec;
- return obj;
- }
- return NULL;
-}
-
-/*
-We try to get the exact inline image length from its dict params. If cannot predict the length, we have to scan the input until 'EI'.
-I've checked on may examples that it gives the same results but one can never be sure, as 'EI' might happen to be a part of the data.
-Stripping white char is also very heuristic; \0 is a white char in PDF and very likely to be a data byte.. weak method (pdf spec page 352).
-
-Revision 20190327: inline images may be compressed, in which case we can't predict the length.
-*/
-
-static size_t inline_image_length (ppdict *dict)
-{
- ppuint w, h, bpc, colors;
- ppname *cs;
-
- if (ppdict_get_name(dict, "F") == NULL)
- {
- if (ppdict_get_uint(dict, "W", &w) && ppdict_get_uint(dict, "H", &h) && ppdict_get_uint(dict, "BPC", &bpc) && (cs = ppdict_get_name(dict, "CS")) != NULL)
- {
- if (ppname_is(cs, "DeviceGray"))
- colors = 1;
- else if (ppname_is(cs, "DeviceRGB"))
- colors = 3;
- else if (ppname_is(cs, "DeviceCMYK"))
- colors = 4;
- else
- return PP_LENGTH_UNKNOWN;
- return (w * h * bpc * colors + 7) >> 3;
- }
- }
- return PP_LENGTH_UNKNOWN;
-}
-
-static ppstring * ppstring_inline (iof *I, ppdict *imagedict, ppheap *heap)
-{
- iof *O;
- int c, d, e;
- size_t length, leftin, leftout, bytes;
-
- c = iof_char(I);
- if (ignored_char(c))
- c = iof_next(I);
-
- length = inline_image_length(imagedict);
- if (length != PP_LENGTH_UNKNOWN)
- {
- O = ppbytes_buffer(heap, length);
- while (length > 0 && iof_readable(I) && iof_writable(O))
- {
- leftin = iof_left(I);
- leftout = iof_left(O);
- bytes = length;
- if (bytes > leftin) bytes = leftin;
- if (bytes > leftout) bytes = leftout;
- memcpy(O->pos, I->pos, bytes);
- I->pos += bytes;
- O->pos += bytes;
- length -= bytes;
- }
- // gobble EI
- if (ppscan_find(I) == 'E')
- if (iof_next(I) == 'I')
- ++I->pos;
- }
- else
- {
- O = ppbytes_buffer(heap, PPSTRING_INIT); // ?
- while (c >= 0)
- {
- if (c == 'E')
- {
- d = iof_next(I);
- if (d == 'I')
- {
- e = iof_next(I);
- if (!ppnamebyte(e))
- { /* strip one newline from the end and stop */
- if (O->pos - 2 >= O->buf) // sanity
- {
- c = *(O->pos - 1);
- if (ignored_char(c))
- {
- if (c == 0x0A && *(O->pos - 2) == 0x0D)
- O->pos -= 2;
- else
- O->pos -= 1;
- }
- }
- break;
- }
- iof_put2(O, c, d);
- c = e;
- }
- else
- {
- iof_put(O, c);
- c = d;
- }
- }
- else
- {
- iof_put(O, c);
- c = iof_next(I);
- }
- }
- }
- return ppstring_buffer(O, heap);
-}
-
-/* input reader */
-
-/*
-PDF input is a pseudo file that either keeps FILE * or data. Reader iof * is a proxy to input
-that provides byte-by-byte interface. Our iof structure is capable to link iof_file *input,
-but t avoid redundant checks on IOF_DATA flag, here we link iof *I directly to FILE * or mem buffer.
-When reading from file we need an internal buffer, which should be kept rather small, as it is
-only used to parse xrefs and objects (no streams). We allocate the buffer from a private heap
-(not static) to avoid conflicts when processing >1 pdfs at once. Besides, the input buffer may be
-needed after loading the document, eg. to access references raw data.
-*/
-
-#define PPDOC_BUFFER 0xFFF // keep that small, it is only used to parse body objects
-
-static void ppdoc_reader_init (ppdoc *pdf, iof_file *input)
-{
- iof *I;
- pdf->input = *input;
- input = &pdf->input;
- input->refcount = 1;
- I = &pdf->reader;
- if (input->flags & IOF_DATA)
- {
- pdf->buffer = NULL; // input iof_file is the buffer
- iof_string_reader(I, NULL, 0);
- }
- else
- {
- pdf->buffer = (uint8_t *)ppbytes_take(&pdf->heap, PPDOC_BUFFER);
- iof_setup_file_handle_reader(I, NULL, 0, iof_file_get_fh(input)); // gets IOF_FILE_HANDLE flag and FILE *
- I->space = PPDOC_BUFFER; // used on refill
- }
-}
-
-/*
-Whenever we need to read the input file, we fseek the to the given offset and fread to the private buffer.
-The length we need is not always predictable, in which case PPDOC_BUFFER bytes are read (keep it small).
-I->buf = I->pos is set to the beginning, I->end set to the end (end is the first byte one shouldn't read).
-*/
-
-static iof * ppdoc_reader (ppdoc *pdf, size_t offset, size_t length)
-{
- iof_file *input;
- iof *I;
- input = &pdf->input;
- I = &pdf->reader;
- if (iof_file_seek(input, (long)offset, SEEK_SET) != 0)
- return NULL;
- I->flags &= ~IOF_STOPPED;
- if (input->flags & IOF_DATA)
- {
- I->buf = I->pos = input->pos;
- I->end = (length == PP_LENGTH_UNKNOWN || I->pos + length >= input->end) ? input->end : (I->pos + length);
- }
- else
- {
- I->buf = I->pos = pdf->buffer; // ->buf is actually permanently equal pdf->buffer but we might need some tricks
- if (length == PP_LENGTH_UNKNOWN || length > PPDOC_BUFFER)
- length = PPDOC_BUFFER;
- length = fread(I->buf, 1, length, I->file);
- I->end = I->buf + length;
- }
- return I;
-}
-
-/* The position from the beginning of input
-- for data buffer: (pdf->input.pos - pdf->input.buf) + (I->pos - I->buf)
- I->buf == pdf->input.pos, so this resolves to (I->pos - pdf->input.buf), independent from I->buf
-- for file buffer: ftell(pdf->input.file) - (I->end - I->pos)
-*/
-
-#define ppdoc_reader_tell(pdf, I) ((size_t)(((pdf)->input.flags & IOF_DATA) ? ((I)->pos - (pdf)->input.buf) : (ftell(iof_file_get_fh(&(pdf)->input)) - ((I)->end - (I)->pos))))
-
-/* pdf */
-
-#define PPDOC_HEADER 10 // "%PDF-?.??\n"
-
-static int ppdoc_header (ppdoc *pdf, uint8_t header[PPDOC_HEADER])
-{
- size_t i;
- if (memcmp(header, "%PDF-", 5) != 0)
- return 0;
- for (i = 5; i < PPDOC_HEADER - 1 && !ignored_char(header[i]); ++i)
- pdf->version[i - 5] = header[i];
- pdf->version[i - 5] = '\0';
- return 1;
-}
-
-static int ppdoc_tail (ppdoc *pdf, iof_file *input, size_t *pxrefoffset)
-{
- int c;
- uint8_t tail[4*10], *p, back, tailbytes;
-
- if (iof_file_seek(input, 0, SEEK_END) != 0)
- return 0;
- pdf->filesize = (size_t)iof_file_tell(input);
- // simple heuristic to avoid fgetc() / fseek(-2) hiccup: keep seeking back by len(startxref) + 1 == 10
- // until a letter found (assuming liberal white characters and tail length)
- for (back = 1, tailbytes = 0; ; ++back)
- {
- if (iof_file_seek(input, -10, SEEK_CUR) != 0)
- return 0;
- tailbytes += 10;
- c = iof_file_getc(input);
- tailbytes -= 1;
- switch (c)
- {
- case IGNORED_CHAR_CASE:
- case DIGIT_CHAR_CASE:
- case '%': case 'E': case 'O': case 'F':
- if (back > 4) // 2 should be enough
- return 0;
- continue;
- case 's': case 't': case 'a': case 'r': case 'x': case 'e': case 'f':
- if (iof_file_read(tail, 1, tailbytes, input) != tailbytes)
- return 0;
- tail[tailbytes] = '\0';
- for (p = &tail[0]; ; ++p)
- {
- if (*p == '\0')
- return 0;
- if ((c = base10_value(*p)) >= 0)
- break;
- }
- ppread_uint(p, pxrefoffset);
- return 1;
- default:
- return 0;
- }
- }
- return 0; // never reached
-}
-
-/* xref/body */
-
-static int ppscan_start_entry (iof *I, ppref *ref)
-{
- ppuint u;
- ppscan_find(I); if (!ppscan_uint(I, &u) || u != ref->number) return 0;
- ppscan_find(I); if (!ppscan_uint(I, &u) || u != ref->version) return 0;
- ppscan_find(I); if (!ppscan_key(I, "obj")) return 0;
- ppscan_find(I);
- return 1;
-}
-
-static int ppscan_skip_entry (iof *I)
-{
- ppuint u;
- ppscan_find(I); if (!ppscan_uint(I, &u)) return 0;
- ppscan_find(I); if (!ppscan_uint(I, &u)) return 0;
- ppscan_find(I); if (!ppscan_key(I, "obj")) return 0;
- ppscan_find(I);
- return 1;
-}
-
-static int ppscan_start_stream (iof *I, ppdoc *pdf, size_t *streamoffset)
-{
- int c;
- ppscan_find(I);
- if (ppscan_key(I, "stream"))
- { // PJ20180912 bugfix: we were gobbling white characters (also null byte), while "stream" may be followed by EOL
- // pdf spec page 60: "CARRIAGE RETURN and a LINE FEED or just a LINE FEED, and not by a CARRIAGE RETURN alone"
- c = iof_char(I);
- if (c == 0x0D)
- {
- if (iof_next(I) == 0x0A) // should be
- ++I->pos;
- }
- else if (c == 0x0A)
- {
- ++I->pos;
- }
- *streamoffset = ppdoc_reader_tell(pdf, I);
- return 1;
- }
- return 0;
-}
-
-static ppxref * ppxref_load (ppdoc *pdf, size_t xrefoffset);
-static ppxref * ppxref_load_chain (ppdoc *pdf, ppxref *xref);
-
-/* Parsing xref table
-
- 1 10 // first ref number and refs count
- 0000000000 00000 n // 10-digits offset, 5 digits version, type identifier
- 0000000000 00000 n // n states for normal I guess
- 0000000000 00000 f // f states for free (not used)
- ...
-
-Free entries seem to be a relic of ancient times, completelly useless for us. To avoid parsing xref table twice,
-we waste some space on free entries by allocating one plane of refs for each section. Later on we slice sections,
-so that effectively free entries are not involved in map.
-
-Subsequent refs gets number, version and offset. Other fields initialized when parsing PDF body.
-
-Having xref table loaded, we sort sections for future binary search (xref with objects count == 0 is considered invalid).
-
-Then we have to deal with the trailer dict. In general, to load objects and resolve references we need a complete chain
-of xrefs (not only the top). To load the previous xref, we need its offset, which is given in trailer. So we have to
-parse the trailer ignoring references, which might be unresolvable at this point (objects parser makes a dummy check
-for xref != NULL on refs resolving ppscan_obj(), which irritates me but I don't want a separate parser for trailer..).
-The same applies to xref streams, in which we have parse the trailer not having xref map at all. So the procedure is:
-
- - load xref map, initialize references, make it ready to search
- - parse trailer ignoring references
- - get /Prev xref offset and load older xref (linked list via ->prev)
- - sort all refs in all xrefs by offset
- - parse refs in order resolving references in contained objects
- - fix trailer references
-
-First created xref becomes a pdf->xref (top xref). We link that early to control offsets already read (insane loops?).
-*/
-
-// Every xref table item "0000000000 00000 n" is said to be terminated with 2-byte EOL but we don't like relying on whites.
-#define xref_item_length (10 + 1 + 5 + 1 + 1)
-
-static ppxref * ppxref_load_table (iof *I, ppdoc *pdf, size_t xrefoffset)
-{
- ppxref *xref;
- ppxsec *xrefsection;
- ppref *ref;
- ppuint first, count, refindex;
- uint8_t buffer[xref_item_length + 1];
- const char *p;
- const ppobj *obj;
-
- buffer[xref_item_length] = '\0';
- xref = ppxref_create(pdf, 0, xrefoffset);
- if (pdf->xref == NULL) pdf->xref = xref;
-
- for (ppscan_find(I); ppscan_uint(I, &first); ppscan_find(I))
- {
- ppscan_find(I);
- if (!ppscan_uint(I, &count))
- return NULL;
- if (count == 0) // weird
- continue;
- xref->count += count;
- xrefsection = NULL;
- ref = (ppref *)ppstruct_take(&pdf->heap, count * sizeof(ppref));
- for (refindex = 0; refindex < count; ++refindex, ++ref)
- {
- ref->xref = xref;
- ref->number = first + refindex;
- ppscan_find(I);
- iof_read(I, buffer, xref_item_length);
- switch (buffer[xref_item_length - 1])
- {
- case 'n':
- if (xrefsection == NULL)
- {
- xrefsection = ppxref_push_section(xref, &pdf->heap);
- xrefsection->first = ref->number;
- xrefsection->refs = ref;
- }
- xrefsection->last = ref->number;
- for (p = (const char *)buffer; *p == '0'; ++p);
- p = ppread_uint(p, &ref->offset);
- for ( ; *p == ' ' || *p == '0'; ++p);
- p = ppread_uint(p, &ref->version);
- ref->object.type = PPNONE; // init for sanity
- ref->object.any = NULL;
- ref->length = 0;
- break;
- case 'f':
- default:
- --ref;
- xrefsection = NULL;
- --xref->count;
- }
- }
- }
- /* sort section */
- ppxref_sort(xref); // case of xref->size == 0 handled by ppxref_load_chain()
- /* get trailer ignoring refs */
- if (!ppscan_key(I, "trailer"))
- return NULL;
- ppscan_find(I);
- if ((obj = ppscan_obj(I, pdf, NULL)) == NULL)
- return NULL;
- ppstack_pop(&pdf->stack, 1);
- if (obj->type != PPDICT)
- return NULL;
- xref->trailer = *obj;
- return ppxref_load_chain(pdf, xref);
-}
-
-/* Parsing xref stream
-First we load the trailer, ignoring references. Dict defines sections and fields lengths:
-
- /Size % max ref number plus 1
- /Index [ first count first count ... ] % a pair of numbers for every section, defaults to [0 Size]
- /W [w1 w2 w3] % fields lengths, 0 states for omitted field
-
-xref stream data is a continuous stream of binary number triplets. First number is a type:
-
- 0 - free entry (as 'f' in xref table)
- 1 - normal entry, followed by offset an version (as 'n' in xref table)
- 2 - compressed entry, followed by parent object stream number and entry index
-
-0 and 1 are handled as 'n' and 'f' entries in xref table. For type 2 we normally initialize
-ref->number and ref->version (the later is implicitly 0). ref->offset is set to 0 (invalid offset),
-which is recognized by objects loader.
-*/
-
-#define XREF_STREAM_MAX_FIELD 4
-
-static ppxref * ppxref_load_stream (iof *I, ppdoc *pdf, size_t xrefoffset)
-{
- ppxref *xref;
- ppxsec *xrefsection;
- ppref *ref;
- ppobj *obj;
- ppstream *xrefstream;
- size_t streamoffset;
- ppuint w1, w2, w3, w, bufferbytes;
- uint8_t buffer[3 * XREF_STREAM_MAX_FIELD], *b;
- ppuint first, count, f1, f2, f3;
- pparray *fieldwidths, *sectionindices;
- ppobj sectionmock[2], *sectionfirst, *sectioncount;
- size_t sections, sectionindex, refindex;
-
- if (!ppscan_skip_entry(I))
- return NULL;
- if ((obj = ppscan_obj(I, pdf, NULL)) == NULL)
- return NULL;
- ppstack_pop(&pdf->stack, 1);
- if (obj->type != PPDICT || !ppscan_start_stream(I, pdf, &streamoffset))
- return NULL;
- xrefstream = ppstream_create(pdf, obj->dict, streamoffset);
- ppstream_info(xrefstream, pdf);
- if ((fieldwidths = ppdict_get_array(xrefstream->dict, "W")) != NULL)
- {
- if (!pparray_get_uint(fieldwidths, 0, &w1)) w1 = 0;
- if (!pparray_get_uint(fieldwidths, 1, &w2)) w2 = 0;
- if (!pparray_get_uint(fieldwidths, 2, &w3)) w3 = 0;
- }
- else
- w1 = w2 = w3 = 0;
- if (w1 > XREF_STREAM_MAX_FIELD || w2 > XREF_STREAM_MAX_FIELD || w3 > XREF_STREAM_MAX_FIELD)
- return NULL;
- bufferbytes = w1 + w2 + w3;
- if ((sectionindices = ppdict_get_array(xrefstream->dict, "Index")) != NULL)
- {
- sections = sectionindices->size >> 1;
- sectionfirst = sectionindices->data;
- }
- else
- {
- sections = 1;
- sectionmock[0].type = PPINT;
- sectionmock[0].integer = 0;
- sectionmock[1].type = PPINT;
- if (!ppdict_get_int(xrefstream->dict, "Size", &sectionmock[1].integer))
- sectionmock[1].integer = 0;
- sectionfirst = &sectionmock[0];
- }
- if ((I = ppstream_read(xrefstream, 1, 0)) == NULL)
- return NULL; // we fseek() so original I is useless anyway
- xref = ppxref_create(pdf, sections, xrefoffset);
- if (pdf->xref == NULL) pdf->xref = xref;
- xref->trailer.type = PPSTREAM;
- xref->trailer.stream = xrefstream;
- for (sectionindex = 0; sectionindex < sections; ++sectionindex, sectionfirst += 2)
- {
- sectioncount = sectionfirst + 1;
- first = 0, count = 0; // warnings
- if (!ppobj_get_uint(sectionfirst, first) || !ppobj_get_uint(sectioncount, count))
- goto xref_stream_error;
- if (count == 0)
- continue;
- xref->count += count;
- xrefsection = NULL;
- ref = (ppref *)ppstruct_take(&pdf->heap, count * sizeof(ppref));
- for (refindex = 0; refindex < count; ++refindex, ++ref)
- {
- ref->xref = xref;
- ref->number = first + refindex;
- if (iof_read(I, buffer, bufferbytes) != bufferbytes)
- goto xref_stream_error;
- b = buffer;
- if (w1 == 0)
- f1 = 1; // default type is 1
- else
- for (f1 = 0, w = 0; w < w1; f1 = (f1 << 8)|(*b), ++w, ++b);
- for (f2 = 0, w = 0; w < w2; f2 = (f2 << 8)|(*b), ++w, ++b);
- for (f3 = 0, w = 0; w < w3; f3 = (f3 << 8)|(*b), ++w, ++b);
- switch (f1)
- {
- case 0:
- //--ref;
- xrefsection = NULL;
- --xref->count;
- break;
- case 1:
- if (xrefsection == NULL)
- {
- xrefsection = ppxref_push_section(xref, &pdf->heap);
- xrefsection->first = ref->number;
- xrefsection->refs = ref;
- }
- xrefsection->last = ref->number;
- ref->offset = f2;
- ref->version = f3;
- ref->object.type = PPNONE;
- ref->object.any = NULL;
- ref->length = 0;
- break;
- case 2:
- if (xrefsection == NULL)
- {
- xrefsection = ppxref_push_section(xref, &pdf->heap);
- xrefsection->first = ref->number;
- xrefsection->refs = ref;
- }
- xrefsection->last = ref->number;
- ref->offset = 0; // f2 is parent objstm, f3 is index in parent, both useless
- ref->version = 0; // compressed objects has implicit version == 0
- ref->object.type = PPNONE;
- ref->object.any = NULL;
- ref->length = 0;
- break;
- default:
- goto xref_stream_error;
- }
- }
- }
- /* sort sections */
- ppxref_sort(xref); // case of xref->size == 0 handled by ppxref_load_chain()
- /* close the stream _before_ loading prev xref */
- ppstream_done(xrefstream);
- /* load prev and return */
- return ppxref_load_chain(pdf, xref);
-xref_stream_error:
- ppstream_done(xrefstream);
- return NULL;
-}
-
-/*
-The following procedure loads xref /Prev, links xref->prev and typically returns xref.
-Some docs contain empty xref (one section with zero objects) that is actually a proxy
-to xref stream referred as /XRefStm (genuine concept of xrefs old/new style xrefs in
-the same doc). In case of 0-length xref we ignore the proxy and return the target xref
-(otherwise we would need annoying sanity check for xref->size > 0 on every ref search).
-*/
-
-static ppxref * ppxref_load_chain (ppdoc *pdf, ppxref *xref)
-{
- ppdict *trailer;
- ppuint xrefoffset;
- ppxref *prevxref, *nextxref;
-
- trailer = ppxref_trailer(xref);
- if (!ppdict_get_uint(trailer, "Prev", &xrefoffset)) // XRefStm is useless
- return xref;
- for (nextxref = pdf->xref; nextxref != NULL; nextxref = nextxref->prev)
- if (nextxref->offset == xrefoffset) // insane
- return NULL;
- if ((prevxref = ppxref_load(pdf, (size_t)xrefoffset)) == NULL)
- return NULL;
- if (xref->size > 0)
- {
- xref->prev = prevxref;
- return xref;
- }
- if (pdf->xref == xref)
- pdf->xref = prevxref;
- return prevxref;
-}
-
-static ppxref * ppxref_load (ppdoc *pdf, size_t xrefoffset)
-{
- iof *I;
-
- if ((I = ppdoc_reader(pdf, xrefoffset, PP_LENGTH_UNKNOWN)) == NULL)
- return NULL;
- ppscan_find(I);
- if (ppscan_key(I, "xref"))
- return ppxref_load_table(I, pdf, xrefoffset);
- return ppxref_load_stream(I, pdf, xrefoffset);
- // iof_close(I) does nothing here
-}
-
-static void ppoffmap_sort (ppref **left, ppref **right)
-{
- ppref **l, **r, *t;
- ppuint pivot;
- l = left, r = right;
- pivot = (*(l + ((r - l) / 2)))->offset;
- do
- { // don't read from pointer!
- while ((*l)->offset < pivot) ++l;
- while ((*r)->offset > pivot) --r;
- if (l <= r)
- {
- t = *l;
- *l = *r;
- *r = t;
- ++l, --r;
- }
- } while (l <= r);
- if (left < r)
- ppoffmap_sort(left, r);
- if (l < right)
- ppoffmap_sort(l, right);
-}
-
-
-static void fix_trailer_references (ppdoc *pdf)
-{
- ppxref *xref;
- ppdict *trailer;
- ppname **pkey;
- ppobj *obj;
- ppref *ref;
- for (xref = pdf->xref; xref != NULL; xref = xref->prev)
- {
- if ((trailer = ppxref_trailer(xref)) == NULL)
- continue;
- for (ppdict_first(trailer, pkey, obj); *pkey != NULL; ppdict_next(pkey, obj))
- { // no need to go deeper in structs, all items in trailer except info and root must be direct refs
- if (obj->type != PPREF)
- continue;
- ref = obj->ref;
- if (ref->offset == 0) // unresolved?
- if ((ref = ppxref_find(xref, ref->number)) != NULL)
- obj->ref = ref; // at this moment the reference still points nothing, but should be the one with the proper offset
- }
- }
-}
-
-/*
-Here comes a procedure that loads all entries from all document bodies. We resolve references while
-parsing objects and to make resolving correct, we need a complete chain of xref maps, and a knowledge
-about possible linearized dict (first offset). So loading refs sorted by offsets makes sense (not sure
-if it matters nowadays but we also avoid fseek() by large offsets).
-
-Here is the proc:
-
- - create a list of all refs in all bodies
- - sort the list by offsets
- - for every ref from the sorted list:
- - estimate object length to avoid fread-ing more than necessary (not perfect but enough)
- - fseek() to the proper offset, fread() entry data or its part
- - parse the object with ppscan_obj(I, pdf, xref), where xref is not necessarily top pdf->xref
- (since v0.98 xref actually no longer matters, see xref_find() notes)
- - save the actual ref->length (not used so far, but we keep that so..)
- - make a stream if a dict is followed by "stream" keyword, also save the stream offset
- - free the list
-
-PJ2080916: Luigi and Hans fixeed a bug (rev 6491); a document having a stream with /Length being
-a reference, that was stored in /ObjStm, and therefore not yet resolved when caching /Length key
-value as stream->offset (ppstream_info()). At the end, references were resolved propertly, but
-the stream was no readable; stream->offset == 0. In rev6491 ObjStm streams are loaded before
-others streams.
-*/
-
-static int ppdoc_load_objstm (ppstream *stream, ppdoc *pdf, ppxref *xref);
-
-#define ppref_is_objstm(ref, stream, type) \
- ((ref)->xref->trailer.type == PPSTREAM && (type = ppdict_get_name((stream)->dict, "Type")) != NULL && ppname_is(type, "ObjStm"))
-
-
-static void ppdoc_load_entries (ppdoc *pdf)
-{
- size_t objects, sectionindex, refnumber, offindex;
- size_t streams = 0, object_streams = 0, redundant_indirections = 0;
- ppnum linearized;
- ppref **offmap, **pref, *ref;
- ppxref *xref;
- ppxsec *xsec;
- ppobj *obj;
- ppname *type;
- ppcrypt *crypt;
- ppstream *stream;
-
- if ((objects = (size_t)ppdoc_objects(pdf)) == 0) // can't happen
- return;
- pref = offmap = (ppref **)pp_malloc(objects * sizeof(ppref *));
- objects = 0; // recount refs with offset > 0
- for (xref = pdf->xref; xref != NULL; xref = xref->prev)
- for (sectionindex = 0, xsec = xref->sects; sectionindex < xref->size; ++sectionindex, ++xsec)
- for (refnumber = xsec->first, ref = xsec->refs; refnumber <= xsec->last; ++refnumber, ++ref)
- if (ref->offset > 0) // 0 means compressed or insane
- *pref++ = ref, ++objects;
- ppoffmap_sort(offmap, offmap + objects - 1);
-
- crypt = pdf->crypt;
- for (offindex = 0, pref = offmap; offindex < objects; )
- {
- ref = *pref;
- ++pref;
- ++offindex;
- if (ref->object.type != PPNONE) // might be preloaded already (/Encrypt dict, stream filter dicts, stream /Length..)
- continue;
- if (offindex < objects)
- ref->length = (*pref)->offset - ref->offset;
- else
- ref->length = pdf->filesize > ref->offset ? pdf->filesize - ref->offset : 0;
- if (crypt != NULL)
- {
- ppcrypt_start_ref(crypt, ref);
- obj = ppdoc_load_entry(pdf, ref);
- ppcrypt_end_ref(crypt);
- }
- else
- {
- obj = ppdoc_load_entry(pdf, ref);
- }
- switch (obj->type)
- {
- case PPDICT: /* Check if the object at first offset is linearized dict. We need that to resolve all references properly. */
- if (offindex == 1 && ppdict_get_num(obj->dict, "Linearized", &linearized)) // /Linearized value is a version number, default 1.0
- pdf->flags |= PPDOC_LINEARIZED;
- break;
- case PPSTREAM:
- ++streams;
- if (ppref_is_objstm(ref, obj->stream, type))
- ++object_streams;
- break;
- case PPREF:
- ++redundant_indirections;
- break;
- default:
- break;
- }
- }
-
- /* cut references pointing to references (rare). doing for all effectively cuts all insane chains */
- for (pref = offmap; redundant_indirections > 0; )
- {
- ref = *pref++;
- if (ref->object.type == PPREF)
- {
- --redundant_indirections;
- ref->object = ref->object.ref->object;
- }
- }
-
- /* load pdf 1.5 object streams _before_ other streams */
- for (pref = offmap; object_streams > 0; )
- {
- ref = *pref++;
- obj = &ref->object;
- if (obj->type != PPSTREAM)
- continue;
- stream = obj->stream;
- if (ppref_is_objstm(ref, stream, type))
- {
- --object_streams;
- if (crypt != NULL)
- {
- ppcrypt_start_ref(crypt, ref);
- ppstream_info(stream, pdf);
- ppcrypt_end_ref(crypt);
- }
- else
- {
- ppstream_info(stream, pdf);
- }
- if (!ppdoc_load_objstm(stream, pdf, ref->xref))
- loggerf("invalid objects stream %s at offset " PPSIZEF, ppref_str(ref->number, ref->version), ref->offset);
-
- }
- }
-
- /* now handle other streams */
- for (pref = offmap; streams > 0; )
- {
- ref = *pref++;
- obj = &ref->object;
- if (obj->type != PPSTREAM)
- continue;
- --streams;
- stream = obj->stream;
- if (crypt != NULL)
- {
- ppcrypt_start_ref(crypt, ref);
- ppstream_info(stream, pdf);
- ppcrypt_end_ref(crypt);
- }
- else
- {
- ppstream_info(stream, pdf);
- }
- }
- pp_free(offmap);
-}
-
-ppobj * ppdoc_load_entry (ppdoc *pdf, ppref *ref)
-{
- iof *I;
- size_t length;
- ppxref *xref;
- ppobj *obj;
- ppstack *stack;
- size_t streamoffset;
- ppref *refref;
- ppuint refnumber, refversion;
-
- length = ref->length > 0 ? ref->length : PP_LENGTH_UNKNOWN; // estimated or unknown
- if ((I = ppdoc_reader(pdf, ref->offset, length)) == NULL || !ppscan_start_entry(I, ref))
- {
- loggerf("invalid %s offset " PPSIZEF, ppref_str(ref->number, ref->version), ref->offset);
- return &ref->object; // PPNONE
- }
- stack = &pdf->stack;
- xref = ref->xref;
- if ((obj = ppscan_obj(I, pdf, xref)) == NULL)
- {
- loggerf("invalid %s object at offset " PPSIZEF, ppref_str(ref->number, ref->version), ref->offset);
- return &ref->object; // PPNONE
- }
- ref->object = *obj;
- ppstack_pop(stack, 1);
- obj = &ref->object;
- ref->length = ppdoc_reader_tell(pdf, I) - ref->offset;
- if (obj->type == PPDICT)
- {
- if (ppscan_start_stream(I, pdf, &streamoffset))
- {
- obj->type = PPSTREAM;
- obj->stream = ppstream_create(pdf, obj->dict, streamoffset);
- }
- }
- else if (obj->type == PPINT)
- {
- ppscan_find(I);
- if (ppscan_uint(I, &refversion) && ppscan_find(I) == 'R')
- {
- refnumber = (ppuint)obj->integer;
- if ((refref = ppxref_find(xref, refnumber)) != NULL)
- {
- obj->type = PPREF;
- obj->ref = refref;
- }
- else
- {
- obj->type = PPNONE; // as ppref_unresolved()
- obj->any = NULL;
- }
- }
- }
- return obj;
-}
-
-/* Loading entries from object stream
-
- /N is the number of contained entries
- /First is the offset of the first item
-
-The stream consists of N pairs of numbers <objnum> <offset> <objnum> <offset> ...
-Offsets are ascending (relative to the first), but ref numbers order is arbitrary.
-PDF spec says there might be some additional data between objects, so we should obey offsets.
-Which means we should basically load the stream at once (may be needed anyway to grab the stream [...]).
-*/
-
-static int ppdoc_load_objstm (ppstream *stream, ppdoc *pdf, ppxref *xref)
-{
- ppdict *dict; // stream dict, actually still on stack
- ppref *ref;
- ppobj *obj;
- ppuint items, firstoffset, offset, objnum, i, invalid = 0;
- iof *I;
- uint8_t *firstdata, *indexdata;
- ppstack *stack;
-
- dict = stream->dict;
- if (!ppdict_rget_uint(dict, "N", &items) || !ppdict_rget_uint(dict, "First", &firstoffset))
- return 0;
- if ((I = ppstream_read(stream, 1, 1)) == NULL)
- return 0;
- firstdata = I->pos + firstoffset;
- if (firstdata >= I->end)
- goto invalid_objstm;
- stack = &pdf->stack;
- //if (pdf->crypt != NULL)
- // ppcrypt_end_ref(pdf->crypt); // objects are not encrypted, pdf->crypt->ref ensured NULL
- for (i = 0; i < items; ++i)
- {
- ppscan_find(I);
- if (!ppscan_uint(I, &objnum))
- goto invalid_objstm;
- ppscan_find(I);
- if (!ppscan_uint(I, &offset))
- goto invalid_objstm;
- if ((ref = ppxref_find_local(xref, objnum)) == NULL || ref->object.type != PPNONE)
- {
- loggerf("invalid compressed object number " PPUINTF " at position " PPUINTF, objnum, i);
- ++invalid;
- continue;
- }
- if (firstdata + offset >= I->end)
- {
- loggerf("invalid compressed object offset " PPUINTF " at position " PPUINTF, offset, i);
- ++invalid;
- continue;
- }
- indexdata = I->pos; // save position
- I->pos = firstdata + offset; // go to the object
- ppscan_find(I);
- if ((obj = ppscan_obj(I, pdf, xref)) != NULL)
- {
- ref->object = *obj;
- ppstack_pop(stack, 1);
- // nothing more needed, as obj can never be indirect ref or stream
- }
- else
- {
- ++invalid;
- loggerf("invalid compressed object %s at stream offset " PPUINTF, ppref_str(objnum, 0), offset);
- }
- I->pos = indexdata; // restore position and read next from index
- }
- ppstream_done(stream);
- return invalid == 0;
-invalid_objstm:
- ppstream_done(stream);
- return 0;
-}
-
-/* main PDF loader proc */
-
-ppcrypt_status ppdoc_crypt_pass (ppdoc *pdf, const void *userpass, size_t userpasslength, const void *ownerpass, size_t ownerpasslength)
-{
- switch (pdf->cryptstatus)
- {
- case PPCRYPT_NONE:
- case PPCRYPT_DONE:
- case PPCRYPT_FAIL:
- break;
- case PPCRYPT_PASS: // initial status or really needs password
- pdf->cryptstatus = ppdoc_crypt_init(pdf, userpass, userpasslength, ownerpass, ownerpasslength);
- switch (pdf->cryptstatus)
- {
- case PPCRYPT_NONE:
- case PPCRYPT_DONE:
- ppdoc_load_entries(pdf);
- break;
- case PPCRYPT_PASS: // user needs to check ppdoc_crypt_status() and recall ppdoc_crypt_pass() with the proper password
- case PPCRYPT_FAIL: // hopeless..
- break;
- }
- break;
- }
- return pdf->cryptstatus;
-}
-
-static ppdoc * ppdoc_read (ppdoc *pdf, iof_file *input)
-{
- uint8_t header[PPDOC_HEADER];
- size_t xrefoffset;
-
- input = &pdf->input;
- if (iof_file_read(header, 1, PPDOC_HEADER, input) != PPDOC_HEADER || !ppdoc_header(pdf, header))
- return NULL;
- if (!ppdoc_tail(pdf, input, &xrefoffset))
- return NULL;
- if (ppxref_load(pdf, xrefoffset) == NULL)
- return NULL;
- fix_trailer_references(pdf); // after loading xrefs but before accessing trailer refs (/Encrypt might be a reference)
- // check encryption, if any, try empty password
- switch (ppdoc_crypt_pass(pdf, "", 0, NULL, 0))
- {
- case PPCRYPT_NONE: // no encryption
- case PPCRYPT_DONE: // encryption with an empty password
- case PPCRYPT_PASS: // the user needs to check ppdoc_crypt_status() and call ppdoc_crypt_pass()
- break;
- case PPCRYPT_FAIL: // hopeless
- //loggerf("decryption failed");
- //return NULL;
- break;
- }
- return pdf;
-}
-
-static void ppdoc_pages_init (ppdoc *pdf);
-
-/*
-20191214: We used to allocate ppdoc, as all other structs, from the internal heap:
-
- ppheap heap;
- ppheap_init(&heap);
- pdf = (ppdoc *)ppstruct_take(&heap, sizeof(ppdoc));
- pdf->heap = heap;
- ppbytes_buffer_init(&pdf->heap);
- ...
-
-So ppdoc pdf was allocated from the heap owned by the pdf itself. Somewhat tricky, but should work fine,
-as from that point nothing refered to a local heap variable addres. For some reason that causes a crash
-on openbsd.
-*/
-
-static ppdoc * ppdoc_create (iof_file *input)
-{
- ppdoc *pdf;
-
- pdf = (ppdoc *)pp_malloc(sizeof(ppdoc));
- ppheap_init(&pdf->heap);
- ppbytes_buffer_init(&pdf->heap);
- ppstack_init(&pdf->stack, &pdf->heap);
- ppdoc_reader_init(pdf, input);
- ppdoc_pages_init(pdf);
- pdf->xref = NULL;
- pdf->crypt = NULL;
- pdf->cryptstatus = PPCRYPT_PASS; // check on ppdoc_read() -> ppdoc_crypt_pass()
- pdf->flags = 0;
- pdf->version[0] = '\0';
- if (ppdoc_read(pdf, &pdf->input) != NULL)
- return pdf;
- ppdoc_free(pdf);
- return NULL;
-}
-
-ppdoc * ppdoc_load (const char *filename)
-{
- FILE *file;
- iof_file input;
- if ((file = fopen(filename, "rb")) == NULL)
- return NULL;
- iof_file_init(&input, file);
- input.flags |= IOF_CLOSE_FILE;
- return ppdoc_create(&input);
-}
-
-ppdoc * ppdoc_filehandle (FILE *file, int closefile)
-{
- iof_file input;
- if (file == NULL)
- return NULL;
- iof_file_init(&input, file);
- if (closefile)
- input.flags |= IOF_CLOSE_FILE;
- return ppdoc_create(&input);
-}
-
-ppdoc * ppdoc_mem (const void *data, size_t size)
-{
- iof_file input;
- iof_file_rdata_init(&input, data, size);
- input.flags |= IOF_BUFFER_ALLOC;
- return ppdoc_create(&input);
-}
-
-void ppdoc_free (ppdoc *pdf)
-{
- iof_file_decref(&pdf->input);
- ppstack_free_buffer(&pdf->stack);
- ppheap_free(&pdf->heap);
- pp_free(pdf);
-}
-
-ppcrypt_status ppdoc_crypt_status (ppdoc *pdf)
-{
- return pdf->cryptstatus;
-}
-
-ppint ppdoc_permissions (ppdoc *pdf)
-{
- return pdf->crypt != NULL ? pdf->crypt->permissions : (ppint)0xFFFFFFFFFFFFFFFF;
-}
-
-/* pages access */
-
-static pparray * pppage_node (ppdict *dict, ppuint *count, ppname **type)
-{
- ppname **pkey, *key;
- ppobj *obj;
- pparray *kids = NULL;
- *count = 0;
- *type = NULL;
- for (ppdict_first(dict, pkey, obj); (key = *pkey) != NULL; ppdict_next(pkey, obj))
- {
- switch (key->data[0])
- {
- case 'T':
- if (ppname_is(key, "Type"))
- *type = ppobj_get_name(obj);
- break;
- case 'C':
- if (ppname_is(key, "Count"))
- ppobj_rget_uint(obj, *count);
- break;
- case 'K':
- if (ppname_is(key, "Kids"))
- kids = ppobj_rget_array(obj);
- break;
- }
- }
- return kids;
-}
-
-#define ppname_is_page(type) (type != NULL && ppname_is(type, "Page"))
-
-ppuint ppdoc_page_count (ppdoc *pdf)
-{
- ppref *ref;
- ppname *type;
- ppuint count;
- if ((ref = ppxref_pages(pdf->xref)) == NULL)
- return 0;
- if (pppage_node(ref->object.dict, &count, &type) == NULL)
- return ppname_is_page(type) ? 1 : 0; // acrobat and ghostscript accept documents with root /Pages entry being a reference to a sole /Page object
- return count;
-}
-
-ppref * ppdoc_page (ppdoc *pdf, ppuint index)
-{
- ppdict *dict;
- ppuint count;
- pparray *kids;
- size_t size, i;
- ppobj *r, *o;
- ppref *ref;
- ppname *type;
-
- if ((ref = ppxref_pages(pdf->xref)) == NULL)
- return NULL;
- dict = ref->object.dict;
- if ((kids = pppage_node(dict, &count, &type)) != NULL)
- {
- if (index < 1 || index > count)
- return NULL;
- }
- else
- {
- return index == 1 && ppname_is_page(type) ? ref : NULL;
- }
-scan_array:
- if (index <= count / 2)
- { // probably shorter way from the beginning
- for (i = 0, size = kids->size, r = pparray_at(kids, 0); i < size; ++i, ++r)
- {
- if (r->type != PPREF)
- return NULL;
- o = &r->ref->object;
- if (o->type != PPDICT)
- return NULL;
- dict = o->dict;
- if ((kids = pppage_node(dict, &count, &type)) != NULL)
- {
- if (index <= count)
- goto scan_array;
- index -= count;
- continue;
- }
- if (index == 1 && ppname_is_page(type))
- return r->ref;
- --index;
- }
- }
- else if ((size = kids->size) > 0) // for safe (size-1)
- { // probably shorter way from the end
- index = count - index + 1;
- for (i = 0, r = pparray_at(kids, size - 1); i < size; ++i, --r)
- {
- if (r->type != PPREF)
- return NULL;
- o = &r->ref->object;
- if (o->type != PPDICT)
- return NULL;
- dict = o->dict;
- if ((kids = pppage_node(dict, &count, &type)) != NULL)
- {
- if (index <= count) {
- index = count - index + 1;
- goto scan_array;
- }
- index -= count;
- continue;
- }
- if (index == 1 && ppname_is_page(type))
- return r->ref;
- --index;
- }
- }
- return NULL;
-}
-
-/*
-Through pages iterator. Iterating over pages tree just on the base of /Kids and /Parent keys
-is ineffective, as to get next pageref we need to take parent, find the pageref in /Kids,
-take next (or go upper).. Annoying. We use a dedicated stack for pages iterator. This could
-actually be done with pdf->stack, but some operations may clear it, so safer to keep it independent
-Besides, its depth is constant (set on first use), so no need for allocs.
-*/
-
-static void ppdoc_pages_init (ppdoc *pdf)
-{
- pppages *pages;
- pages = &pdf->pages;
- pages->root = pages->parent = &pages->buffer[0];
- pages->depth = 0;
- pages->space = PPPAGES_STACK_DEPTH;
-}
-
-static ppkids * pppages_push (ppdoc *pdf, pparray *kids)
-{
- ppkids *newroot, *bounds;
- pppages *pages;
- pages = &pdf->pages;
- if (pages->depth == pages->space)
- {
- pages->space <<= 1;
- newroot = (ppkids *)ppstruct_take(&pdf->heap, pages->space * sizeof(ppkids));
- memcpy(newroot, pages->root, pages->depth * sizeof(ppkids));
- pages->root = newroot;
- }
- bounds = pages->parent = &pages->root[pages->depth++];
- bounds->current = pparray_at(kids, 0);
- bounds->sentinel = pparray_at(kids, kids->size);
- return bounds;
-}
-
-#define pppages_pop(pages) (--((pages)->parent), --((pages)->depth))
-
-static ppref * ppdoc_pages_group_first (ppdoc *pdf, ppref *ref)
-{
- ppdict *dict;
- pparray *kids;
- ppuint count;
- ppname *type;
- ppobj *o;
-
- dict = ref->object.dict; // typecheck made by callers
- while ((kids = pppage_node(dict, &count, &type)) != NULL)
- {
- if ((o = pparray_get_obj(kids, 0)) == NULL) // empty /Kids
- return ppdoc_next_page(pdf);
- if ((ref = ppobj_get_ref(o)) == NULL || ref->object.type != PPDICT)
- return NULL;
- pppages_push(pdf, kids);
- dict = ref->object.dict;
- }
- return ppname_is_page(type) ? ref : NULL;
-}
-
-ppref * ppdoc_first_page (ppdoc *pdf)
-{
- ppref *ref;
- pppages *pages;
- if ((ref = ppdoc_pages(pdf)) == NULL)
- return NULL;
- pages = &pdf->pages;
- pages->parent = pages->root;
- pages->depth = 0;
- return ppdoc_pages_group_first(pdf, ref);
-}
-
-ppref * ppdoc_next_page (ppdoc *pdf)
-{
- pppages *pages;
- ppkids *bounds;
- ppref *ref;
- ppobj *obj;
- pages = &pdf->pages;
- while (pages->depth > 0)
- {
- bounds = pages->parent;
- obj = ++bounds->current;
- if (obj < bounds->sentinel)
- {
- if (obj->type != PPREF)
- return NULL;
- ref = obj->ref;
- if (ref->object.type != PPDICT)
- return NULL;
- return ppdoc_pages_group_first(pdf, ref);
- }
- else
- { // no next node, go upper
- pppages_pop(pages);
- }
- }
- return NULL;
-}
-
-/* context */
-
-ppcontext * ppcontext_new (void)
-{
- ppcontext *context;
- context = (ppcontext *)pp_malloc(sizeof(ppcontext));
- ppheap_init(&context->heap);
- ppbytes_buffer_init(&context->heap);
- ppstack_init(&context->stack, &context->heap);
- return context;
-}
-
-void ppcontext_done (ppcontext *context)
-{
- ppheap_renew(&context->heap);
- ppstack_clear(&context->stack);
-}
-
-void ppcontext_free (ppcontext *context)
-{
- ppstack_free_buffer(&context->stack);
- ppheap_free(&context->heap);
- pp_free(context);
-}
-
-/* page contents streams */
-
-//#define ppcontents_first_stream(array) pparray_rget_stream(array, 0)
-
-static ppstream * ppcontents_first_stream (pparray *array)
-{
- size_t i;
- ppobj *obj;
- ppref *ref;
- for (pparray_first(array, i, obj); i < array->size; pparray_next(i, obj))
- if ((ref = ppobj_get_ref(obj)) != NULL && ref->object.type == PPSTREAM)
- return ref->object.stream;
- return NULL;
-}
-
-static ppstream * ppcontents_next_stream (pparray *array, ppstream *stream)
-{
- size_t i;
- ppobj *obj;
- ppref *ref;
- for (pparray_first(array, i, obj); i < array->size; pparray_next(i, obj))
- if ((ref = ppobj_get_ref(obj)) != NULL && ref->object.type == PPSTREAM && ref->object.stream == stream)
- if (++i < array->size && (ref = ppobj_get_ref(obj + 1)) != NULL && ref->object.type == PPSTREAM)
- return ref->object.stream;
- return NULL;
-}
-
-ppstream * ppcontents_first (ppdict *dict)
-{
- ppobj *contentsobj;
- if ((contentsobj = ppdict_rget_obj(dict, "Contents")) == NULL)
- return NULL;
- switch (contentsobj->type)
- {
- case PPARRAY:
- return ppcontents_first_stream(contentsobj->array);
- case PPSTREAM:
- return contentsobj->stream;
- default:
- break;
- }
- return NULL;
-}
-
-ppstream * ppcontents_next (ppdict *dict, ppstream *stream)
-{
- ppobj *contentsobj;
- if ((contentsobj = ppdict_rget_obj(dict, "Contents")) == NULL)
- return NULL;
- switch (contentsobj->type)
- {
- case PPARRAY:
- return ppcontents_next_stream(contentsobj->array, stream);
- case PPSTREAM:
- break;
- default:
- break;
- }
- return NULL;
-}
-
-static ppobj * ppcontents_op (iof *I, ppstack *stack, size_t *psize, ppname **pname)
-{
- ppobj *obj;
- ppstack_clear(stack);
- do {
- if (ppscan_find(I) < 0)
- return NULL;
- if ((obj = ppscan_psobj(I, stack)) == NULL)
- return NULL;
- } while (obj->type != PPNAME || !ppname_exec(obj->name));
- *pname = obj->name;
- *psize = stack->size - 1;
- return stack->buf;
-}
-
-ppobj * ppcontents_first_op (ppcontext *context, ppstream *stream, size_t *psize, ppname **pname)
-{
- iof *I;
- if ((I = ppstream_read(stream, 1, 0)) == NULL)
- return NULL;
- return ppcontents_op(I, &context->stack, psize, pname);
-}
-
-ppobj * ppcontents_next_op (ppcontext *context, ppstream *stream, size_t *psize, ppname **pname)
-{
- return ppcontents_op(ppstream_iof(stream), &context->stack, psize, pname);
-}
-
-ppobj * ppcontents_parse (ppcontext *context, ppstream *stream, size_t *psize)
-{
- iof *I;
- ppstack *stack;
- ppobj *obj;
- stack = &context->stack;
- ppstack_clear(stack);
- if ((I = ppstream_read(stream, 1, 0)) == NULL)
- return NULL;
- while (ppscan_find(I) >= 0)
- if ((obj = ppscan_psobj(I, stack)) == NULL)
- goto error;
- *psize = stack->size;
- ppstream_done(stream);
- return stack->buf;
-error:
- ppstream_done(stream);
- return NULL;
-}
-
-/* boxes */
-
-pprect * pparray_to_rect (pparray *array, pprect *rect)
-{
- ppobj *obj;
- if (array->size != 4)
- return NULL;
- obj = pparray_at(array, 0);
- if (!ppobj_get_num(obj, rect->lx)) return NULL;
- obj = pparray_at(array, 1);
- if (!ppobj_get_num(obj, rect->ly)) return NULL;
- obj = pparray_at(array, 2);
- if (!ppobj_get_num(obj, rect->rx)) return NULL;
- obj = pparray_at(array, 3);
- if (!ppobj_get_num(obj, rect->ry)) return NULL;
- return rect;
-}
-
-pprect * ppdict_get_rect (ppdict *dict, const char *name, pprect *rect)
-{
- pparray *array;
- return (array = ppdict_rget_array(dict, name)) != NULL ? pparray_to_rect(array, rect) : NULL;
-}
-
-pprect * ppdict_get_box (ppdict *dict, const char *name, pprect *rect)
-{
- do {
- if (ppdict_get_rect(dict, name, rect) != NULL)
- return rect;
- dict = ppdict_rget_dict(dict, "Parent");
- } while (dict != NULL);
- return NULL;
-}
-
-ppmatrix * pparray_to_matrix (pparray *array, ppmatrix *matrix)
-{
- ppobj *obj;
- if (array->size != 6)
- return NULL;
- obj = pparray_at(array, 0);
- if (!ppobj_get_num(obj, matrix->xx)) return NULL;
- obj = pparray_at(array, 1);
- if (!ppobj_get_num(obj, matrix->xy)) return NULL;
- obj = pparray_at(array, 2);
- if (!ppobj_get_num(obj, matrix->yx)) return NULL;
- obj = pparray_at(array, 3);
- if (!ppobj_get_num(obj, matrix->yy)) return NULL;
- obj = pparray_at(array, 4);
- if (!ppobj_get_num(obj, matrix->x)) return NULL;
- obj = pparray_at(array, 5);
- if (!ppobj_get_num(obj, matrix->y)) return NULL;
- return matrix;
-}
-
-ppmatrix * ppdict_get_matrix (ppdict *dict, const char *name, ppmatrix *matrix)
-{
- pparray *array;
- return (array = ppdict_rget_array(dict, name)) != NULL ? pparray_to_matrix(array, matrix) : NULL;
-}
-
-/* logger */
-
-void pplog_callback (pplogger_callback logger, void *alien)
-{
- logger_callback((logger_function)logger, alien);
-}
-
-int pplog_prefix (const char *prefix)
-{
- return logger_prefix(prefix);
-}
-
-/* version */
-
-const char * ppdoc_version_string (ppdoc *pdf)
-{
- return pdf->version;
-}
-
-int ppdoc_version_number (ppdoc *pdf, int *minor)
-{
- *minor = pdf->version[2] - '0';
- return pdf->version[0] - '0';
-}
-
-/* doc info */
-
-size_t ppdoc_file_size (ppdoc *pdf)
-{
- return pdf->filesize;
-}
-
-ppuint ppdoc_objects (ppdoc *pdf)
-{
- ppuint count;
- ppxref *xref;
- for (count = 0, xref = pdf->xref; xref != NULL; xref = xref->prev)
- count += xref->count;
- return count;
-}
-
-size_t ppdoc_memory (ppdoc *pdf, size_t *waste)
-{
- mem_info info;
- size_t used;
- ppbytes_heap_info(&pdf->heap, &info, 0);
- ppstruct_heap_info(&pdf->heap, &info, 1);
-
- *waste = info.ghosts + info.blockghosts + info.left; // info.ghosts == 0
- used = info.used + *waste;
- used += pdf->stack.space * sizeof(ppobj);
- return used;
-}