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fontconfig/fc-lang/fc-lang.c

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C
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/*
* fontconfig/fc-lang/fc-lang.c
*
* Copyright © 2002 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 "fccharset.c"
#include "fcstr.c"
#include "fcserialize.c"
/*
* fc-lang
*
* Read a set of language orthographies and build C declarations for
* charsets which can then be used to identify which languages are
* supported by a given font. Note that this uses some utilities
* from the fontconfig library, so the necessary file is simply
* included in this compilation. A couple of extra utility
* functions are also needed in slightly modified form
*/
FcPrivate void
FcCacheObjectReference (void *object FC_UNUSED)
{
}
FcPrivate void
FcCacheObjectDereference (void *object FC_UNUSED)
{
}
FcPrivate FcChar8 *
FcLangNormalize (const FcChar8 *lang FC_UNUSED)
{
return NULL;
}
int FcDebugVal;
FcChar8 *
FcConfigHome (void)
{
return (FcChar8 *) getenv ("HOME");
}
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);
}
static char *
get_line (FILE *f, char *buf, int *lineno)
{
char *hash;
char *line;
int end;
next:
line = buf;
if (!fgets (line, 1024, f))
return 0;
++(*lineno);
hash = strchr (line, '#');
if (hash)
*hash = '\0';
while (line[0] && isspace (line[0]))
line++;
end = strlen (line);
while (end > 0 && isspace (line[end-1]))
line[--end] = '\0';
if (line[0] == '\0' || line[0] == '\n' || line[0] == '\r')
goto next;
return line;
}
static char *dir = 0;
static FILE *
scanopen (char *file)
{
FILE *f;
f = fopen (file, "r");
if (!f && dir)
{
char path[1024];
strcpy (path, dir);
strcat (path, "/");
strcat (path, file);
f = fopen (path, "r");
}
return f;
}
/*
* build a single charset from a source file
*
* The file format is quite simple, either
* a single hex value or a pair separated with a dash
*
* Comments begin with '#'
*/
static FcCharSet *
scan (FILE *f, char *file, FcCharSetFreezer *freezer)
{
FcCharSet *c = 0;
FcCharSet *n;
FcBool del;
int start, end, ucs4;
char buf[1024];
char *line;
int lineno = 0;
while ((line = get_line (f, buf, &lineno)))
{
if (!strncmp (line, "include", 7))
{
FILE *included_f;
char *included_file;
included_file = strchr (line, ' ');
if (!included_file)
fatal (file, lineno,
"invalid syntax, expected: include filename");
while (isspace(*included_file))
included_file++;
included_f = scanopen (included_file);
if (!included_f)
fatal (included_file, 0, "can't open");
n = scan (included_f, included_file, freezer);
fclose (included_f);
if (!c)
c = FcCharSetCreate ();
if (!FcCharSetMerge (c, n, NULL))
fatal (file, lineno, "out of memory");
FcCharSetDestroy (n);
continue;
}
del = FcFalse;
if (line[0] == '-')
{
del = FcTrue;
line++;
}
if (strchr (line, '-'))
{
if (sscanf (line, "%x-%x", &start, &end) != 2)
fatal (file, lineno, "parse error");
}
else if (strstr (line, ".."))
{
if (sscanf (line, "%x..%x", &start, &end) != 2)
fatal (file, lineno, "parse error");
}
else
{
if (sscanf (line, "%x", &start) != 1)
fatal (file, lineno, "parse error");
end = start;
}
if (!c)
c = FcCharSetCreate ();
for (ucs4 = start; ucs4 <= end; ucs4++)
{
if (!((del ? FcCharSetDelChar : FcCharSetAddChar) (c, ucs4)))
fatal (file, lineno, "out of memory");
}
}
n = (FcCharSet *) FcCharSetFreeze (freezer, c);
FcCharSetDestroy (c);
return n;
}
/*
* Convert a file name into a name suitable for C declarations
*/
static char *
get_name (char *file)
{
char *name;
char *dot;
dot = strchr (file, '.');
if (!dot)
dot = file + strlen(file);
name = malloc (dot - file + 1);
strncpy (name, file, dot - file);
name[dot-file] = '\0';
return name;
}
/*
* Convert a C name into a language name
*/
static char *
get_lang (char *name)
{
char *lang = malloc (strlen (name) + 1);
char *l = lang;
char c;
while ((c = *name++))
{
if (isupper ((int) (unsigned char) c))
c = tolower ((int) (unsigned char) c);
if (c == '_')
c = '-';
if (c == ' ')
continue;
*l++ = c;
}
*l++ = '\0';
return lang;
}
typedef struct _Entry {
int id;
char *file;
} Entry;
static int compare (const void *a, const void *b)
{
const Entry *as = a, *bs = b;
return FcStrCmpIgnoreCase ((const FcChar8 *) as->file, (const FcChar8 *) bs->file);
}
#define MAX_LANG 1024
#define MAX_LANG_SET_MAP ((MAX_LANG + 31) / 32)
#define BitSet(map, i) ((map)[(entries[i].id)>>5] |= ((FcChar32) 1U << ((entries[i].id) & 0x1f)))
int
main (int argc FC_UNUSED, char **argv)
{
static Entry entries[MAX_LANG + 1];
static FcCharSet *sets[MAX_LANG];
static int duplicate[MAX_LANG];
static int country[MAX_LANG];
static char *names[MAX_LANG];
static char *langs[MAX_LANG];
static int off[MAX_LANG];
FILE *f;
int ncountry = 0;
int i = 0;
int nsets = 0;
int argi;
FcCharLeaf **leaves;
int total_leaves = 0;
int l, sl, tl, tn;
static char line[1024];
static FcChar32 map[MAX_LANG_SET_MAP];
int num_lang_set_map;
int setRangeStart[26];
int setRangeEnd[26];
FcChar8 setRangeChar;
FcCharSetFreezer *freezer;
freezer = FcCharSetFreezerCreate ();
if (!freezer)
fatal (argv[0], 0, "out of memory");
argi = 1;
while (argv[argi])
{
if (!strcmp (argv[argi], "-d"))
{
argi++;
dir = argv[argi++];
continue;
}
if (i == MAX_LANG)
fatal (argv[0], 0, "Too many languages");
entries[i].id = i;
entries[i].file = argv[argi++];
i++;
}
entries[i].file = 0;
qsort (entries, i, sizeof (Entry), compare);
i = 0;
while (entries[i].file)
{
f = scanopen (entries[i].file);
if (!f)
fatal (entries[i].file, 0, strerror (errno));
sets[i] = scan (f, entries[i].file, freezer);
names[i] = get_name (entries[i].file);
langs[i] = get_lang(names[i]);
if (strchr (langs[i], '-'))
country[ncountry++] = i;
total_leaves += sets[i]->num;
i++;
fclose (f);
}
nsets = i;
sets[i] = 0;
leaves = malloc (total_leaves * sizeof (FcCharLeaf *));
tl = 0;
/*
* Find unique leaves
*/
for (i = 0; sets[i]; i++)
{
for (sl = 0; sl < sets[i]->num; sl++)
{
for (l = 0; l < tl; l++)
if (leaves[l] == FcCharSetLeaf(sets[i], sl))
break;
if (l == tl)
leaves[tl++] = FcCharSetLeaf(sets[i], sl);
}
}
/*
* Scan the input until the marker is found
*/
while (fgets (line, sizeof (line), stdin))
{
if (!strncmp (line, "@@@", 3))
break;
fputs (line, stdout);
}
printf ("/* total size: %d unique leaves: %d */\n\n",
total_leaves, tl);
/*
* Find duplicate charsets
*/
duplicate[0] = -1;
for (i = 1; sets[i]; i++)
{
int j;
duplicate[i] = -1;
for (j = 0; j < i; j++)
if (sets[j] == sets[i])
{
duplicate[i] = j;
break;
}
}
tn = 0;
for (i = 0; sets[i]; i++) {
if (duplicate[i] >= 0)
continue;
off[i] = tn;
tn += sets[i]->num;
}
printf ("#define LEAF0 (%d * sizeof (FcLangCharSet))\n", nsets);
printf ("#define OFF0 (LEAF0 + %d * sizeof (FcCharLeaf))\n", tl);
printf ("#define NUM0 (OFF0 + %d * sizeof (uintptr_t))\n", tn);
printf ("#define SET(n) (n * sizeof (FcLangCharSet) + offsetof (FcLangCharSet, charset))\n");
printf ("#define OFF(s,o) (OFF0 + o * sizeof (uintptr_t) - SET(s))\n");
printf ("#define NUM(s,n) (NUM0 + n * sizeof (FcChar16) - SET(s))\n");
printf ("#define LEAF(o,l) (LEAF0 + l * sizeof (FcCharLeaf) - (OFF0 + o * sizeof (intptr_t)))\n");
printf ("#define fcLangCharSets (fcLangData.langCharSets)\n");
printf ("#define fcLangCharSetIndices (fcLangData.langIndices)\n");
printf ("#define fcLangCharSetIndicesInv (fcLangData.langIndicesInv)\n");
printf ("\n");
printf ("static const struct {\n"
" FcLangCharSet langCharSets[%d];\n"
" FcCharLeaf leaves[%d];\n"
" uintptr_t leaf_offsets[%d];\n"
" FcChar16 numbers[%d];\n"
" FcChar%s langIndices[%d];\n"
" FcChar%s langIndicesInv[%d];\n"
"} fcLangData = {\n",
nsets, tl, tn, tn,
nsets < 256 ? "8 " : "16", nsets, nsets < 256 ? "8 " : "16", nsets);
/*
* Dump sets
*/
printf ("{\n");
for (i = 0; sets[i]; i++)
{
int j = duplicate[i];
if (j < 0)
j = i;
printf (" { \"%s\", "
" { FC_REF_CONSTANT, %d, OFF(%d,%d), NUM(%d,%d) } }, /* %d */\n",
langs[i],
sets[j]->num, i, off[j], i, off[j], i);
}
printf ("},\n");
/*
* Dump leaves
*/
printf ("{\n");
for (l = 0; l < tl; l++)
{
printf (" { { /* %d */", l);
for (i = 0; i < 256/32; i++)
{
if (i % 4 == 0)
printf ("\n ");
printf (" 0x%08x,", leaves[l]->map[i]);
}
printf ("\n } },\n");
}
printf ("},\n");
/*
* Dump leaves
*/
printf ("{\n");
for (i = 0; sets[i]; i++)
{
int n;
if (duplicate[i] >= 0)
continue;
printf (" /* %s */\n", names[i]);
for (n = 0; n < sets[i]->num; n++)
{
if (n % 4 == 0)
printf (" ");
for (l = 0; l < tl; l++)
if (leaves[l] == FcCharSetLeaf(sets[i], n))
break;
if (l == tl)
fatal (names[i], 0, "can't find leaf");
printf (" LEAF(%3d,%3d),", off[i], l);
if (n % 4 == 3)
printf ("\n");
}
if (n % 4 != 0)
printf ("\n");
}
printf ("},\n");
printf ("{\n");
for (i = 0; sets[i]; i++)
{
int n;
if (duplicate[i] >= 0)
continue;
printf (" /* %s */\n", names[i]);
for (n = 0; n < sets[i]->num; n++)
{
if (n % 8 == 0)
printf (" ");
printf (" 0x%04x,", FcCharSetNumbers (sets[i])[n]);
if (n % 8 == 7)
printf ("\n");
}
if (n % 8 != 0)
printf ("\n");
}
printf ("},\n");
/* langIndices */
printf ("{\n");
for (i = 0; sets[i]; i++)
{
printf (" %d, /* %s */\n", entries[i].id, names[i]);
}
printf ("},\n");
/* langIndicesInv */
printf ("{\n");
{
static int entries_inv[MAX_LANG];
for (i = 0; sets[i]; i++)
entries_inv[entries[i].id] = i;
for (i = 0; sets[i]; i++)
printf (" %d, /* %s */\n", entries_inv[i], names[entries_inv[i]]);
}
printf ("}\n");
printf ("};\n\n");
printf ("#define NUM_LANG_CHAR_SET %d\n", i);
num_lang_set_map = (i + 31) / 32;
printf ("#define NUM_LANG_SET_MAP %d\n", num_lang_set_map);
/*
* Dump indices with country codes
*/
if (ncountry)
{
int c;
int ncountry_ent = 0;
printf ("\n");
printf ("static const FcChar32 fcLangCountrySets[][NUM_LANG_SET_MAP] = {\n");
for (c = 0; c < ncountry; c++)
{
i = country[c];
if (i >= 0)
{
int lang = strchr (langs[i], '-') - langs[i];
int d, k;
for (k = 0; k < num_lang_set_map; k++)
map[k] = 0;
BitSet (map, i);
for (d = c + 1; d < ncountry; d++)
{
int j = country[d];
if (j >= 0 && !strncmp (langs[j], langs[i], lang + 1))
{
BitSet(map, j);
country[d] = -1;
}
}
printf (" {");
for (k = 0; k < num_lang_set_map; k++)
printf (" 0x%08x,", map[k]);
printf (" }, /* %*.*s */\n",
lang, lang, langs[i]);
++ncountry_ent;
}
}
printf ("};\n\n");
printf ("#define NUM_COUNTRY_SET %d\n", ncountry_ent);
}
/*
* Find ranges for each letter for faster searching
*/
setRangeChar = 'a';
memset(setRangeStart, '\0', sizeof (setRangeStart));
memset(setRangeEnd, '\0', sizeof (setRangeEnd));
for (i = 0; sets[i]; i++)
{
char c = names[i][0];
while (setRangeChar <= c && c <= 'z')
setRangeStart[setRangeChar++ - 'a'] = i;
}
while (setRangeChar <= 'z') /* no language code starts with these letters */
setRangeStart[setRangeChar++ - 'a'] = i;
for (setRangeChar = 'a'; setRangeChar < 'z'; setRangeChar++)
setRangeEnd[setRangeChar - 'a'] = setRangeStart[setRangeChar+1-'a'] - 1;
setRangeEnd[setRangeChar - 'a'] = i - 1;
/*
* Dump sets start/finish for the fastpath
*/
printf ("\n");
printf ("static const FcLangCharSetRange fcLangCharSetRanges[] = {\n");
printf ("\n");
for (setRangeChar = 'a'; setRangeChar <= 'z' ; setRangeChar++)
{
printf (" { %d, %d }, /* %c */\n",
setRangeStart[setRangeChar - 'a'],
setRangeEnd[setRangeChar - 'a'], setRangeChar);
}
printf ("};\n\n");
while (fgets (line, sizeof (line), stdin))
fputs (line, stdout);
fflush (stdout);
exit (ferror (stdout));
}
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