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authorKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
committerKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
commitad547a6b5986815fda458221149728d9d9ab1d87 (patch)
tree16296910eb3eca724371474ea9aea3994dc69614 /Build/source/texk/web2c/pdftexdir/tounicode.c
parent947b43de3dd21d58ccc2ffadefc4441ea1c2a813 (diff)
restore Build,TODO from r57911
git-svn-id: svn://tug.org/texlive/trunk@57915 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/pdftexdir/tounicode.c')
-rw-r--r--Build/source/texk/web2c/pdftexdir/tounicode.c531
1 files changed, 531 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/pdftexdir/tounicode.c b/Build/source/texk/web2c/pdftexdir/tounicode.c
new file mode 100644
index 00000000000..858954efde4
--- /dev/null
+++ b/Build/source/texk/web2c/pdftexdir/tounicode.c
@@ -0,0 +1,531 @@
+/*
+Copyright 2006-2021 Han The Thanh, <thanh@pdftex.org>
+
+This file is part of pdfTeX.
+
+pdfTeX is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+pdfTeX is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ptexlib.h"
+
+#define isXdigit(c) (isdigit(c) || ('A' <= (c) && (c) <= 'F'))
+#define UNI_UNDEF -1
+#define UNI_STRING -2 /* string allocated by deftounicode() */
+#define UNI_EXTRA_STRING -3 /* string allocated by set_glyph_unicode() */
+
+static struct avl_table *glyph_unicode_tree = NULL;
+
+static int comp_glyph_unicode_entry(const void *pa, const void *pb, void *p)
+{
+ return strcmp(((const glyph_unicode_entry *) pa)->name,
+ ((const glyph_unicode_entry *) pb)->name);
+}
+
+static glyph_unicode_entry *new_glyph_unicode_entry(void)
+{
+ glyph_unicode_entry *e;
+ e = xtalloc(1, glyph_unicode_entry);
+ e->name = NULL;
+ e->code = UNI_UNDEF;
+ e->unicode_seq = NULL;
+ return e;
+}
+
+static void destroy_glyph_unicode_entry(void *pa, void *pb)
+{
+ glyph_unicode_entry *e = (glyph_unicode_entry *) pa;
+ xfree(e->name);
+ if (e->code == UNI_STRING) {
+ assert(e->unicode_seq != NULL);
+ xfree(e->unicode_seq);
+ }
+}
+
+void glyph_unicode_free(void)
+{
+ if (glyph_unicode_tree != NULL)
+ avl_destroy(glyph_unicode_tree, destroy_glyph_unicode_entry);
+}
+
+void deftounicode(strnumber glyph, strnumber unistr)
+{
+ char buf[SMALL_BUF_SIZE], *p;
+ char buf2[SMALL_BUF_SIZE], *q;
+ int valid_unistr; /* 0: invalid; 1: unicode value; 2: string */
+ int i, l;
+ glyph_unicode_entry *gu, t;
+ void **aa;
+
+ p = makecstring(glyph);
+ assert(strlen(p) < SMALL_BUF_SIZE);
+ strcpy(buf, p); /* copy the result to buf before next call of makecstring() */
+ p = makecstring(unistr);
+ while (*p == ' ')
+ p++; /* ignore leading spaces */
+ l = strlen(p);
+ while (l > 0 && p[l - 1] == ' ')
+ l--; /* ignore trailing spaces */
+ valid_unistr = 1; /* a unicode value is the most common case */
+ for (i = 0; i < l; i++) {
+ if (p[i] == ' ')
+ valid_unistr = 2; /* if a space occurs we treat this entry as a string */
+ else if (!isXdigit((unsigned char)p[i])) {
+ valid_unistr = 0;
+ break;
+ }
+ }
+ if (l == 0 || valid_unistr == 0 || strlen(buf) == 0
+ || strcmp(buf, notdef) == 0) {
+ pdftex_warn("ToUnicode: invalid parameter(s): `%s' => `%s'", buf, p);
+ return;
+ }
+ if (glyph_unicode_tree == NULL) {
+ glyph_unicode_tree =
+ avl_create(comp_glyph_unicode_entry, NULL, &avl_xallocator);
+ assert(glyph_unicode_tree != NULL);
+ }
+ t.name = buf;
+ /* allow overriding existing entries */
+ if ((gu = (glyph_unicode_entry *) avl_find(glyph_unicode_tree, &t)) != NULL) {
+ if (gu->code == UNI_STRING) {
+ assert(gu->unicode_seq != NULL);
+ xfree(gu->unicode_seq);
+ }
+ } else { /* make new entry */
+ gu = new_glyph_unicode_entry();
+ gu->name = xstrdup(buf);
+ }
+ if (valid_unistr == 2) { /* a string with space(s) */
+ /* copy p to buf2, ignoring spaces */
+ for (q = buf2; *p != 0; p++)
+ if (*p != ' ')
+ *q++ = *p;
+ *q = 0;
+ gu->code = UNI_STRING;
+ gu->unicode_seq = xstrdup(buf2);
+ } else {
+ i = sscanf(p, "%lX", &(gu->code));
+ assert(i == 1);
+ if (gu->code < 0 || gu->code > 0x10FFFF) {
+ pdftex_warn("ToUnicode: value out of range [0,10FFFF]: %lX",
+ gu->code);
+ gu->code = UNI_UNDEF;
+ }
+ }
+ aa = avl_probe(glyph_unicode_tree, gu);
+ assert(aa != NULL);
+}
+
+
+static long check_unicode_value(const char *s, boolean multiple_value)
+{
+ int l = strlen(s);
+ int i;
+ long code;
+
+ if (l == 0)
+ return UNI_UNDEF;
+ if (multiple_value && l % 4 != 0)
+ return UNI_UNDEF;
+ if (!multiple_value && !(4 <= l && l <= 6))
+ return UNI_UNDEF;
+
+ for (i = 0; i < l; i++) {
+ if (!isXdigit((unsigned char)s[i]))
+ return UNI_UNDEF;
+ if (multiple_value) {
+ if (i % 4 == 3) {
+ if (sscanf(s + i - 3, "%4lX", &code) != 1)
+ return UNI_UNDEF;
+ if (!((0x0000 <= code && code <= 0xD7FF) ||
+ (0xE000 <= code && code <= 0xFFFF)))
+ return UNI_UNDEF;
+ }
+ } else { /* single value */
+ if (i == l - 1) {
+ if (sscanf(s, "%lX", &code) != 1)
+ return UNI_UNDEF;
+ if (!((0x0000 <= code && code <= 0xD7FF) ||
+ (0xE000 <= code && code <= 0x10FFFF)))
+ return UNI_UNDEF;
+ }
+ }
+ }
+ return code;
+}
+
+static char *utf16be_str(long code)
+{
+ static char buf[SMALL_BUF_SIZE];
+ long v;
+ unsigned vh, vl;
+
+ assert(code >= 0);
+
+ if (code <= 0xFFFF)
+ sprintf(buf, "%04lX", code);
+ else {
+ v = code - 0x10000;
+ vh = v / 0x400 + 0xD800;
+ vl = v % 0x400 + 0xDC00;
+ sprintf(buf, "%04X%04X", vh, vl);
+ }
+ return buf;
+}
+
+
+/* this function writes /ToUnicode data to *gp based on glyph name s and
+ * taking into account tfmname; in case it returns
+ * gp->code == UNI_EXTRA_STRING then the caller is responsible for freeing
+ * gp->unicode_seq too */
+static void set_glyph_unicode(const char *s, const char* tfmname,
+ glyph_unicode_entry *gp)
+{
+ char buf[SMALL_BUF_SIZE], buf2[SMALL_BUF_SIZE], *p;
+ const char *p2; /* p2 points in s; p above points in writable copies */
+ long code;
+ boolean last_component;
+ glyph_unicode_entry tmp, *ptmp;
+
+ /* skip dummy entries */
+ if (s == NULL || s == notdef)
+ return;
+
+ /* strip everything after the first dot */
+ p = strchr(s, '.');
+ if (p != NULL) {
+ *buf = 0;
+ strncat(buf, s, p - s);
+ s = buf;
+ }
+
+ if (strlen(s) == 0)
+ return;
+
+ /* check for case of multiple components separated by '_' */
+ p = strchr(s, '_');
+ if (p != NULL) {
+ assert(strlen(s) < sizeof(buf));
+ if (s != buf) {
+ strcpy(buf, s);
+ p = strchr(buf, '_');
+ s = buf;
+ }
+ *buf2 = 0;
+ last_component = false;
+ for (;;) {
+ *p = 0;
+ tmp.code = UNI_UNDEF;
+ set_glyph_unicode(s, tfmname, &tmp);
+ switch (tmp.code) {
+ case UNI_UNDEF: /* not found, do nothing */
+ break;
+ case UNI_STRING: /* s matched an entry with string value in the database */
+ assert(tmp.unicode_seq != NULL);
+ assert(strlen(buf2) + strlen(tmp.unicode_seq) < sizeof(buf2));
+ strcat(buf2, tmp.unicode_seq);
+ break;
+ case UNI_EXTRA_STRING: /* s is a multiple value of form "uniXXXX" */
+ assert(strlen(buf2) + strlen(tmp.unicode_seq) < sizeof(buf2));
+ strcat(buf2, tmp.unicode_seq);
+ xfree(tmp.unicode_seq);
+ break;
+ default: /* s matched an entry with numeric value in the
+ database, or a value derived from "uXXXX" */
+ assert(tmp.code >= 0);
+ strcat(buf2, utf16be_str(tmp.code));
+ }
+ if (last_component)
+ break;
+ s = p + 1;
+ p = strchr(s, '_');
+ if (p == NULL) {
+ p = strend(s);
+ last_component = true;
+ }
+ }
+ gp->code = UNI_EXTRA_STRING;
+ gp->unicode_seq = xstrdup(buf2);
+ return;
+ }
+
+ /* Glyph name search strategy: first look up the glyph name in the
+ tfm's namespace, failing that look it up in the main database. */
+ /* Note: buf may alias s in the code below, but s and buf2 are
+ guaranteed to be distinct because the code changing buf2 above
+ always returns before reaching the code below. */
+
+ /* lookup for glyph name in the tfm's namespace */
+ snprintf(buf2, SMALL_BUF_SIZE, "tfm:%s/%s", tfmname, s);
+ tmp.name = buf2;
+ tmp.code = UNI_UNDEF;
+ ptmp = (glyph_unicode_entry *) avl_find(glyph_unicode_tree, &tmp);
+ if (ptmp != NULL) {
+ gp->code = ptmp->code;
+ gp->unicode_seq = ptmp->unicode_seq;
+ return;
+ }
+
+ /* lookup for glyph name in the main database */
+ snprintf(buf2, SMALL_BUF_SIZE, "%s", s);
+ tmp.name = buf2;
+ tmp.code = UNI_UNDEF;
+ ptmp = (glyph_unicode_entry *) avl_find(glyph_unicode_tree, &tmp);
+ if (ptmp != NULL) {
+ gp->code = ptmp->code;
+ gp->unicode_seq = ptmp->unicode_seq;
+ return;
+ }
+
+ /* check for case of "uniXXXX" (multiple 4-hex-digit values allowed) */
+ if (str_prefix(s, "uni")) {
+ p2 = s + strlen("uni");
+ code = check_unicode_value(p2, true);
+ if (code != UNI_UNDEF) {
+ if (strlen(p2) == 4) /* single value */
+ gp->code = code;
+ else { /* multiple value */
+ gp->code = UNI_EXTRA_STRING;
+ gp->unicode_seq = xstrdup(p2);
+ }
+ }
+ return; /* since the last case cannot happen */
+ }
+
+ /* check for case of "uXXXX" (single value up to 6 hex digits) */
+ if (str_prefix(s, "u")) {
+ p2 = s + strlen("u");
+ code = check_unicode_value(p2, false);
+ if (code != UNI_UNDEF) {
+ assert(code >= 0);
+ gp->code = code;
+ }
+ }
+}
+
+
+/* tfmname is without .tfm extension, but encname ends in .enc; */
+integer write_tounicode(char **glyph_names, const char *tfmname,
+ const char* encname)
+{
+ char buf[SMALL_BUF_SIZE], *p;
+ static char builtin_suffix[] = "builtin";
+ short range_size[257];
+ glyph_unicode_entry gtab[257];
+ integer objnum;
+ int i, j;
+ int bfchar_count, bfrange_count, subrange_count;
+
+ if (glyph_unicode_tree == NULL) {
+ pdftex_warn("no GlyphToUnicode entry has been inserted yet!");
+ fixedgentounicode = 0;
+ return 0;
+ }
+
+ /* build the name for this CMap as <tfmname>-<encname>; if encname is NULL
+ * then this is a builtin encoding so use instead builtin_suffix */
+ strcpy(buf, tfmname);
+ strcat(buf, "-");
+ if (encname) {
+ assert(strlen(tfmname) + strlen(encname) + 1 < SMALL_BUF_SIZE);
+ strcat(buf, encname);
+ if ((p = strrchr(buf, '.')) != NULL && strcmp(p, ".enc") == 0)
+ *p = 0; /* strip ".enc" from encoding name */
+ else /* some silly encoding file name not ending in enc; use as-is */
+ pdftex_warn("Dubious encoding file name: `%s'", encname);
+ } else { /* this is a builtin encoding, so name is e.g. "cmr10-builtin" */
+ assert(strlen(tfmname) + strlen(builtin_suffix) + 1 < SMALL_BUF_SIZE);
+ strcat(buf, builtin_suffix);
+ }
+
+ objnum = pdfnewobjnum();
+ pdfbegindict(objnum, 0);
+ pdfbeginstream();
+ pdf_printf("%%!PS-Adobe-3.0 Resource-CMap\n"
+ "%%%%DocumentNeededResources: ProcSet (CIDInit)\n"
+ "%%%%IncludeResource: ProcSet (CIDInit)\n"
+ "%%%%BeginResource: CMap (TeX-%s-0)\n"
+ "%%%%Title: (TeX-%s-0 TeX %s 0)\n"
+ "%%%%Version: 1.000\n"
+ "%%%%EndComments\n"
+ "/CIDInit /ProcSet findresource begin\n"
+ "12 dict begin\n"
+ "begincmap\n"
+ "/CIDSystemInfo\n"
+ "<< /Registry (TeX)\n"
+ "/Ordering (%s)\n"
+ "/Supplement 0\n"
+ ">> def\n"
+ "/CMapName /TeX-%s-0 def\n"
+ "/CMapType 2 def\n"
+ "1 begincodespacerange\n"
+ "<00> <FF>\n" "endcodespacerange\n", buf, buf, buf, buf, buf);
+
+ /* set gtab */
+ for (i = 0; i < 256; ++i) {
+ gtab[i].code = UNI_UNDEF;
+ set_glyph_unicode(glyph_names[i], tfmname, &gtab[i]);
+ }
+ gtab[256].code = UNI_UNDEF;
+
+ /* set range_size */
+ for (i = 0; i < 256;) {
+ if (gtab[i].code == UNI_STRING || gtab[i].code == UNI_EXTRA_STRING) {
+ range_size[i] = 1; /* single entry */
+ i++;
+ } else if (gtab[i].code == UNI_UNDEF) {
+ range_size[i] = 0; /* no entry */
+ i++;
+ } else { /* gtab[i].code >= 0 */
+ j = i;
+ while (i < 256 && gtab[i + 1].code >= 0 &&
+ gtab[i].code + 1 == gtab[i + 1].code)
+ i++;
+ /* at this point i is the last entry of the subrange */
+ i++; /* move i to the next entry */
+ range_size[j] = i - j;
+ }
+ }
+
+ /* calculate bfrange_count and bfchar_count */
+ bfrange_count = 0;
+ bfchar_count = 0;
+ for (i = 0; i < 256;) {
+ if (range_size[i] == 1) {
+ bfchar_count++;
+ i++;
+ } else if (range_size[i] > 1) {
+ bfrange_count++;
+ i += range_size[i];
+ } else
+ i++;
+ }
+
+ /* write out bfrange */
+ i = 0;
+ write_bfrange:
+ if (bfrange_count > 100)
+ subrange_count = 100;
+ else
+ subrange_count = bfrange_count;
+ bfrange_count -= subrange_count;
+ pdf_printf("%i beginbfrange\n", subrange_count);
+ for (j = 0; j < subrange_count; j++) {
+ while (range_size[i] <= 1 && i < 256)
+ i++;
+ assert(i < 256);
+ pdf_printf("<%02X> <%02X> <%s>\n", i, i + range_size[i] - 1,
+ utf16be_str(gtab[i].code));
+ i += range_size[i];
+ }
+ pdf_printf("endbfrange\n");
+ if (bfrange_count > 0)
+ goto write_bfrange;
+
+ /* write out bfchar */
+ i = 0;
+ write_bfchar:
+ if (bfchar_count > 100)
+ subrange_count = 100;
+ else
+ subrange_count = bfchar_count;
+ bfchar_count -= subrange_count;
+ pdf_printf("%i beginbfchar\n", subrange_count);
+ for (j = 0; j < subrange_count; j++) {
+ while (i < 256) {
+ if (range_size[i] > 1)
+ i += range_size[i];
+ else if (range_size[i] == 0)
+ i++;
+ else /* range_size[i] == 1 */
+ break;
+ }
+ assert(i < 256 && gtab[i].code != UNI_UNDEF);
+ if (gtab[i].code == UNI_STRING || gtab[i].code == UNI_EXTRA_STRING) {
+ assert(gtab[i].unicode_seq != NULL);
+ pdf_printf("<%02X> <%s>\n", i, gtab[i].unicode_seq);
+ } else
+ pdf_printf("<%02X> <%s>\n", i, utf16be_str(gtab[i].code));
+ i++;
+ }
+ pdf_printf("endbfchar\n");
+ if (bfchar_count > 0)
+ goto write_bfchar;
+
+ /* free strings allocated by set_glyph_unicode() */
+ for (i = 0; i < 256; ++i) {
+ if (gtab[i].code == UNI_EXTRA_STRING)
+ xfree(gtab[i].unicode_seq);
+ }
+
+ pdf_printf("endcmap\n"
+ "CMapName currentdict /CMap defineresource pop\n"
+ "end\n" "end\n" "%%%%EndResource\n" "%%%%EOF\n");
+ pdfendstream();
+ return objnum;
+}
+
+void dumptounicode(void)
+{
+ struct avl_traverser traverse;
+ integer count;
+ glyph_unicode_entry *gu;
+
+ if (glyph_unicode_tree == NULL) {
+ count = 0;
+ generic_dump(count);
+ return;
+ }
+
+ count = avl_count(glyph_unicode_tree);
+ generic_dump(count);
+
+ avl_t_init(&traverse, glyph_unicode_tree);
+ while (gu = avl_t_next(&traverse)) {
+ dumpcharptr(gu->name);
+ generic_dump(gu->code);
+
+ if (gu->code == UNI_STRING)
+ dumpcharptr(gu->unicode_seq);
+ }
+}
+
+void undumptounicode(void)
+{
+ glyph_unicode_entry *tmp;
+ integer remaining;
+
+ generic_undump(remaining);
+
+ if (remaining == 0)
+ return;
+
+ assert(glyph_unicode_tree == NULL);
+ glyph_unicode_tree =
+ avl_create(comp_glyph_unicode_entry, NULL, &avl_xallocator);
+ assert(glyph_unicode_tree != NULL);
+
+ while (remaining--) {
+ void **result;
+ glyph_unicode_entry *gu = new_glyph_unicode_entry();
+ undumpcharptr(gu->name);
+ generic_undump(gu->code);
+
+ if (gu->code == UNI_STRING)
+ undumpcharptr(gu->unicode_seq);
+
+ result = avl_probe(glyph_unicode_tree, gu);
+ assert(*result == gu);
+ }
+}