diff options
Diffstat (limited to 'Build/source/utils/t1utils/t1utils-1.35/t1lib.c')
-rw-r--r-- | Build/source/utils/t1utils/t1utils-1.35/t1lib.c | 441 |
1 files changed, 441 insertions, 0 deletions
diff --git a/Build/source/utils/t1utils/t1utils-1.35/t1lib.c b/Build/source/utils/t1utils/t1utils-1.35/t1lib.c new file mode 100644 index 00000000000..0dac40eddc0 --- /dev/null +++ b/Build/source/utils/t1utils/t1utils-1.35/t1lib.c @@ -0,0 +1,441 @@ +/* t1lib + * + * This file contains functions for reading PFA and PFB files. + * + * (C) 1999-2008 Eddie Kohler <ekohler@gmail.com>, after code by + * I. Lee Hetherington <ilh@lcs.mit.edu>. All rights reserved. + * + * Permission is hereby granted to use, modify, and distribute this program + * for any purpose provided this copyright notice remains intact. + * + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <string.h> +#include "t1lib.h" +#ifdef __cplusplus +extern "C" { +#endif + +#define PFA_ASCII 1 +#define PFA_EEXEC_TEST 2 +#define PFA_HEX 3 +#define PFA_BINARY 4 + +/* This function returns the value (0-15) of a single hex digit. It returns + 0 for an invalid hex digit. */ + +static int +hexval(char c) +{ + if (c >= 'A' && c <= 'F') + return c - 'A' + 10; + else if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + else if (c >= '0' && c <= '9') + return c - '0'; + else + return 0; +} + +/* This function translates a string of hexadecimal digits into binary data. + We allow an odd number of digits. Returns length of binary data. */ + +static int +translate_hex_string(char *s, char *saved_orphan) +{ + int c1 = *saved_orphan; + char *start = s; + char *t = s; + for (; *s; s++) { + if (isspace(*s)) + continue; + if (c1) { + *t++ = (hexval(c1) << 4) + hexval(*s); + c1 = 0; + } else + c1 = *s; + } + *saved_orphan = c1; + return t - start; +} + +/* This function returns 1 if the string contains all '0's. */ + +static int +all_zeroes(char *s) +{ + if (*s == '\0' || *s == '\n') + return 0; + while (*s == '0') + s++; + return *s == '\0' || *s == '\n'; +} + +/* This function handles the entire file. */ + +#define LINESIZE 1024 + +void +process_pfa(FILE *ifp, const char *ifp_filename, struct font_reader *fr) +{ + /* Loop until no more input. We need to look for `currentfile eexec' to + start eexec section (hex to binary conversion) and line of all zeros to + switch back to ASCII. */ + + /* Don't use fgets() in case line-endings are indicated by bare \r's, as + occurs in Macintosh fonts. */ + + /* 2.Aug.1999 - At the behest of Tom Kacvinsky <tjk@ams.org>, support + binary PFA fonts. */ + + char buffer[LINESIZE]; + int c = 0; + int blocktyp = PFA_ASCII; + char saved_orphan = 0; + (void)ifp_filename; + + while (c != EOF) { + char *line = buffer, *last = buffer; + int crlf = 0; + c = getc(ifp); + while (c != EOF && c != '\r' && c != '\n' && last < buffer + LINESIZE - 1) { + *last++ = c; + c = getc(ifp); + } + + /* handle the end of the line */ + if (last == buffer + LINESIZE - 1) + /* buffer overrun: don't append newline even if we have it */ + ungetc(c, ifp); + else if (c == '\r' && blocktyp != PFA_BINARY) { + /* change CR or CR/LF into LF, unless reading binary data! (This + condition was wrong before, caused Thanh problems - + 6.Mar.2001) */ + c = getc(ifp); + if (c != '\n') + ungetc(c, ifp), crlf = 1; + else + crlf = 2; + *last++ = '\n'; + } else if (c != EOF) + *last++ = c; + + *last = 0; + + /* now that we have the line, handle it */ + if (blocktyp == PFA_ASCII) { + if (strncmp(line, "currentfile eexec", 17) == 0 && isspace(line[17])) { + char saved_p; + /* assert(line == buffer); */ + for (line += 18; isspace(*line); line++) + /* nada */; + saved_p = *line; + *line = 0; + fr->output_ascii(buffer, line - buffer); + *line = saved_p; + blocktyp = PFA_EEXEC_TEST; + if (!*line) + continue; + } else { + fr->output_ascii(line, last - line); + continue; + } + } + + /* check immediately after "currentfile eexec" for ASCII or binary */ + if (blocktyp == PFA_EEXEC_TEST) { + /* 8.Feb.2004: fix bug if first character in a binary eexec block + is 0, reported by Werner Lemberg */ + for (; line < last && isspace(*line); line++) + /* nada */; + if (line == last) + continue; + else if (last >= line + 4 && isxdigit(line[0]) && isxdigit(line[1]) + && isxdigit(line[2]) && isxdigit(line[3])) + blocktyp = PFA_HEX; + else + blocktyp = PFA_BINARY; + memmove(buffer, line, last - line + 1); + last = buffer + (last - line); + line = buffer; + /* patch up crlf fix */ + if (blocktyp == PFA_BINARY && crlf) { + last[-1] = '\r'; + if (crlf == 2) + *last++ = '\n'; + } + } + + /* blocktyp == PFA_HEX || blocktyp == PFA_BINARY */ + if (all_zeroes(line)) { /* XXX not safe */ + fr->output_ascii(line, last - line); + blocktyp = PFA_ASCII; + } else if (blocktyp == PFA_HEX) { + int len = translate_hex_string(line, &saved_orphan); + if (len) + fr->output_binary((unsigned char *)line, len); + } else + fr->output_binary((unsigned char *)line, last - line); + } + + fr->output_end(); +} + +/* Process a PFB file. */ + +/* XXX Doesn't handle "currentfile eexec" as intelligently as process_pfa + does. */ + +static int +handle_pfb_ascii(struct font_reader *fr, char *line, int len) +{ + /* Divide PFB_ASCII blocks into lines */ + int start = 0; + + while (1) { + int pos = start; + + while (pos < len && line[pos] != '\n' && line[pos] != '\r') + pos++; + + if (pos >= len) { + if (pos == start) + return 0; + else if (start == 0 && pos == LINESIZE - 1) { + line[pos] = 0; + fr->output_ascii(line, pos); + return 0; + } else { + memmove(line, line + start, pos - start); + return pos - start; + } + + } else if (pos < len - 1 && line[pos] == '\r' && line[pos+1] == '\n') { + line[pos] = '\n'; + line[pos+1] = 0; + fr->output_ascii(line + start, pos + 1 - start); + start = pos + 2; + + } else { + char save = line[pos+1]; + line[pos] = '\n'; + line[pos+1] = 0; + fr->output_ascii(line + start, pos + 1 - start); + line[pos+1] = save; + start = pos + 1; + } + } +} + + +void +process_pfb(FILE *ifp, const char *ifp_filename, struct font_reader *fr) +{ + int blocktyp = 0; + int block_len = 0; + int c = 0; + int filepos = 0; + int linepos = 0; + char line[LINESIZE]; + + while (1) { + while (block_len == 0) { + c = getc(ifp); + blocktyp = getc(ifp); + if (c != PFB_MARKER + || (blocktyp != PFB_ASCII && blocktyp != PFB_BINARY + && blocktyp != PFB_DONE)) { + if (c == EOF || blocktyp == EOF) + error("%s corrupted: no end-of-file marker", ifp_filename); + else + error("%s corrupted: bad block marker at position %d", + ifp_filename, filepos); + blocktyp = PFB_DONE; + } + if (blocktyp == PFB_DONE) + goto done; + + block_len = getc(ifp) & 0xFF; + block_len |= (getc(ifp) & 0xFF) << 8; + block_len |= (getc(ifp) & 0xFF) << 16; + block_len |= (getc(ifp) & 0xFF) << 24; + if (feof(ifp)) { + error("%s corrupted: bad block length at position %d", + ifp_filename, filepos); + blocktyp = PFB_DONE; + goto done; + } + filepos += 6; + } + + /* read the block in its entirety, in LINESIZE chunks */ + while (block_len > 0) { + int rest = LINESIZE - 1 - linepos; /* leave space for '\0' */ + int n = (block_len > rest ? rest : block_len); + int actual = fread(line + linepos, 1, n, ifp); + if (actual != n) { + error("%s corrupted: block short by %d bytes at position %d", + ifp_filename, block_len - actual, filepos); + block_len = actual; + } + + if (blocktyp == PFB_BINARY) + fr->output_binary((unsigned char *)line, actual); + else + linepos = handle_pfb_ascii(fr, line, linepos + actual); + + block_len -= actual; + filepos += actual; + } + + /* handle any leftover line */ + if (linepos > 0) { + line[linepos] = 0; + fr->output_ascii(line, linepos); + linepos = 0; + } + } + + done: + c = getc(ifp); + if (c != EOF) + error("%s corrupted: data after PFB end marker at position %d", + ifp_filename, filepos - 2); + fr->output_end(); +} + + +#define DEFAULT_BLOCKLEN (1L<<12) + +void +init_pfb_writer(struct pfb_writer *w, int blocklen, FILE *f) +{ + w->len = DEFAULT_BLOCKLEN; + w->buf = (unsigned char *)malloc(w->len); + if (!w->buf) + fatal_error("out of memory"); + w->max_len = (blocklen <= 0 ? 0xFFFFFFFFU : (unsigned)blocklen); + w->pos = 0; + w->blocktyp = PFB_ASCII; + w->binary_blocks_written = 0; + w->f = f; +} + +void +pfb_writer_output_block(struct pfb_writer *w) +{ + /* do nothing if nothing in block */ + if (w->pos == 0) + return; + + /* output four-byte block length */ + putc(PFB_MARKER, w->f); + putc(w->blocktyp, w->f); + putc((int)(w->pos & 0xff), w->f); + putc((int)((w->pos >> 8) & 0xff), w->f); + putc((int)((w->pos >> 16) & 0xff), w->f); + putc((int)((w->pos >> 24) & 0xff), w->f); + + /* output block data */ + fwrite(w->buf, 1, w->pos, w->f); + + /* mark block buffer empty and uninitialized */ + w->pos = 0; + if (w->blocktyp == PFB_BINARY) + w->binary_blocks_written++; +} + +void +pfb_writer_grow_buf(struct pfb_writer *w) +{ + if (w->len < w->max_len) { + /* grow w->buf */ + unsigned new_len = w->len * 2; + unsigned char *new_buf; + if (new_len > w->max_len) + new_len = w->max_len; + new_buf = (unsigned char *)malloc(new_len); + if (!new_buf) { + error("out of memory; continuing with a smaller block size"); + w->max_len = w->len; + pfb_writer_output_block(w); + } else { + memcpy(new_buf, w->buf, w->len); + free(w->buf); + w->buf = new_buf; + w->len = new_len; + } + + } else + /* buf already the right size, just output the block */ + pfb_writer_output_block(w); +} + +void +pfb_writer_end(struct pfb_writer *w) +{ + if (w->pos) + pfb_writer_output_block(w); + putc(PFB_MARKER, w->f); + putc(PFB_DONE, w->f); +} + +/* This CRC table and routine were borrowed from macutils-2.0b3 */ + +static unsigned short crctab[256] = { + 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, + 0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, + 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, + 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, + 0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, + 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, + 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, + 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, + 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, + 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, + 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, + 0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, + 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, + 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, + 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, + 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, + 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, + 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, + 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, + 0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, + 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, + 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, + 0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, + 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, + 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, + 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, + 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, + 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, + 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, + 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, + 0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, + 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0, +}; + +/* + * Update a CRC check on the given buffer. + */ + +int +crcbuf(int crc, unsigned int len, const char *buf) +{ + const unsigned char *ubuf = (const unsigned char *)buf; + while (len--) + crc = ((crc << 8) & 0xFF00) ^ crctab[((crc >> 8) & 0xFF) ^ *ubuf++]; + return crc; +} + +#ifdef __cplusplus +} +#endif |