diff options
Diffstat (limited to 'chromium/third_party/fontconfig/src/fc-glyphname/fc-glyphname.c')
| -rw-r--r-- | chromium/third_party/fontconfig/src/fc-glyphname/fc-glyphname.c | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/chromium/third_party/fontconfig/src/fc-glyphname/fc-glyphname.c b/chromium/third_party/fontconfig/src/fc-glyphname/fc-glyphname.c new file mode 100644 index 00000000000..84027816430 --- /dev/null +++ b/chromium/third_party/fontconfig/src/fc-glyphname/fc-glyphname.c @@ -0,0 +1,325 @@ +/* + * fontconfig/fc-glyphname/fc-glyphname.c + * + * Copyright © 2003 Keith Packard + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of the author(s) not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. The authors make no + * representations about the suitability of this software for any purpose. It + * is provided "as is" without express or implied warranty. + * + * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#include "fcint.h" + +static int +rawindex (const FcGlyphName *gn); + +static void +scan (FILE *f, char *filename); + +static int +isprime (int i); + +static void +find_hash (void); + +static FcChar32 +FcHashGlyphName (const FcChar8 *name); + +static void +insert (FcGlyphName *gn, FcGlyphName **table, FcChar32 h); + +static void +dump (FcGlyphName * const *table, const char *name); + +static FcGlyphName * +FcAllocGlyphName (FcChar32 ucs, FcChar8 *name) +{ + FcGlyphName *gn; + + gn = malloc (sizeof (FcGlyphName) + strlen ((char *) name)); + if (!gn) + return 0; + gn->ucs = ucs; + strcpy ((char *) gn->name, (char *) name); + return gn; +} + +static void +fatal (const char *file, int lineno, const char *msg) +{ + if (lineno) + fprintf (stderr, "%s:%d: %s\n", file, lineno, msg); + else + fprintf (stderr, "%s: %s\n", file, msg); + + exit (1); +} + +#define MAX_GLYPHFILE 256 +#define MAX_GLYPHNAME 10240 +#define MAX_NAMELEN 1024 + +static FcGlyphName *raw[MAX_GLYPHNAME]; +static int nraw; +static int max_name_len; +static FcGlyphName *name_to_ucs[MAX_GLYPHNAME*2]; +static FcGlyphName *ucs_to_name[MAX_GLYPHNAME*2]; +static unsigned int hash, rehash; + +static int +rawindex (const FcGlyphName *gn) +{ + int i; + + for (i = 0; i < nraw; i++) + if (raw[i] == gn) + return i; + return -1; +} + +static void +scan (FILE *f, char *filename) +{ + char buf[MAX_NAMELEN]; + char name[MAX_NAMELEN]; + unsigned long ucs; + FcGlyphName *gn; + int lineno = 0; + int len; + + while (fgets (buf, sizeof (buf), f)) + { + lineno++; + if (sscanf (buf, "%[^;];%lx\n", name, &ucs) != 2) + continue; + gn = FcAllocGlyphName ((FcChar32) ucs, (FcChar8 *) name); + if (!gn) + fatal (filename, lineno, "out of memory"); + len = strlen (name); + if (len > max_name_len) + max_name_len = len; + raw[nraw++] = gn; + } +} + +static int compare_string (const void *a, const void *b) +{ + const char *const *as = a, *const *bs = b; + return strcmp (*as, *bs); +} + +static int compare_glyphname (const void *a, const void *b) +{ + const FcGlyphName *const *ag = a, *const *bg = b; + + return strcmp ((char *) (*ag)->name, (char *) (*bg)->name); +} + +static int +isqrt (int a) +{ + int l, h, m; + + l = 2; + h = a/2; + while ((h-l) > 1) + { + m = (h+l) >> 1; + if (m * m < a) + l = m; + else + h = m; + } + return h; +} + +static int +isprime (int i) +{ + int l, t; + + if (i < 2) + return FcFalse; + if ((i & 1) == 0) + { + if (i == 2) + return FcTrue; + return FcFalse; + } + l = isqrt (i) + 1; + for (t = 3; t <= l; t += 2) + if (i % t == 0) + return 0; + return 1; +} + +/* + * Find a prime pair that leaves at least 25% of the hash table empty + */ + +static void +find_hash (void) +{ + int h; + + h = nraw + nraw / 4; + if ((h & 1) == 0) + h++; + while (!isprime(h-2) || !isprime(h)) + h += 2; + hash = h; + rehash = h-2; +} + +static FcChar32 +FcHashGlyphName (const FcChar8 *name) +{ + FcChar32 h = 0; + FcChar8 c; + + while ((c = *name++)) + { + h = ((h << 1) | (h >> 31)) ^ c; + } + return h; +} + +static void +insert (FcGlyphName *gn, FcGlyphName **table, FcChar32 h) +{ + unsigned int i, r = 0; + + i = (int) (h % hash); + while (table[i]) + { + if (!r) r = (h % rehash + 1); + i += r; + if (i >= hash) + i -= hash; + } + table[i] = gn; +} + +static void +dump (FcGlyphName * const *table, const char *name) +{ + unsigned int i; + + printf ("static const FcGlyphId %s[%d] = {\n", name, hash); + + for (i = 0; i < hash; i++) + if (table[i]) + printf (" %d,\n", rawindex(table[i])); + else + printf (" -1,\n"); + + printf ("};\n"); +} + +int +main (int argc FC_UNUSED, char **argv) +{ + char *files[MAX_GLYPHFILE]; + char line[1024]; + FILE *f; + int i; + const char *type; + + i = 0; + while (argv[i+1]) + { + if (i == MAX_GLYPHFILE) + fatal (*argv, 0, "Too many glyphname files"); + files[i] = argv[i+1]; + i++; + } + files[i] = 0; + qsort (files, i, sizeof (char *), compare_string); + for (i = 0; files[i]; i++) + { + f = fopen (files[i], "r"); + if (!f) + fatal (files[i], 0, strerror (errno)); + scan (f, files[i]); + fclose (f); + } + qsort (raw, nraw, sizeof (FcGlyphName *), compare_glyphname); + + find_hash (); + + for (i = 0; i < nraw; i++) + { + insert (raw[i], name_to_ucs, FcHashGlyphName (raw[i]->name)); + insert (raw[i], ucs_to_name, raw[i]->ucs); + } + + /* + * Scan the input until the marker is found + */ + + while (fgets (line, sizeof (line), stdin)) + { + if (!strncmp (line, "@@@", 3)) + break; + fputs (line, stdout); + } + + printf ("/* %d glyphnames in %d entries, %d%% occupancy */\n\n", + nraw, hash, nraw * 100 / hash); + + printf ("#define FC_GLYPHNAME_HASH %u\n", hash); + printf ("#define FC_GLYPHNAME_REHASH %u\n", rehash); + printf ("#define FC_GLYPHNAME_MAXLEN %d\n\n", max_name_len); + if (nraw < 128) + type = "int8_t"; + else if (nraw < 32768) + type = "int16_t"; + else + type = "int32_t"; + + printf ("typedef %s FcGlyphId;\n\n", type); + + /* + * Dump out entries + */ + + printf ("static const struct { const FcChar32 ucs; const FcChar8 name[%d]; } _fc_glyph_names[%d] = {\n", + max_name_len + 1, nraw); + + for (i = 0; i < nraw; i++) + printf (" { 0x%lx, \"%s\" },\n", + (unsigned long) raw[i]->ucs, raw[i]->name); + + printf ("};\n"); + + /* + * Dump out name_to_ucs table + */ + + dump (name_to_ucs, "_fc_name_to_ucs"); + + /* + * Dump out ucs_to_name table + */ + dump (ucs_to_name, "_fc_ucs_to_name"); + + while (fgets (line, sizeof (line), stdin)) + fputs (line, stdout); + + fflush (stdout); + exit (ferror (stdout)); +} |