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fontconfig/fc-case/fc-case.c

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/*
* fontconfig/fc-case/fc-case.c
*
* Copyright © 2004 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 Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD 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"
#include <ctype.h>
#define MAX_OUT 32
#define MAX_LINE 8192
typedef enum _caseFoldClass { CaseFoldCommon, CaseFoldFull, CaseFoldSimple, CaseFoldTurkic } CaseFoldClass;
typedef struct _caseFoldClassMap {
const char *name;
CaseFoldClass class;
} CaseFoldClassMap;
static const CaseFoldClassMap caseFoldClassMap[] = {
{ "C", CaseFoldCommon },
{ "F", CaseFoldFull },
{ "S", CaseFoldSimple },
{ "T", CaseFoldTurkic },
{ 0, 0 }
};
typedef struct _caseFoldRaw {
FcChar32 upper;
CaseFoldClass class;
int nout;
FcChar32 lower[MAX_OUT];
} CaseFoldRaw;
static void
panic (const char *reason)
{
fprintf (stderr, "fc-case: panic %s\n", reason);
exit (1);
}
int maxExpand;
static FcCaseFold *folds;
int nfolds;
static FcCaseFold *
addFold (void)
{
if (folds)
folds = realloc (folds, (nfolds + 1) * sizeof (FcCaseFold));
else
folds = malloc (sizeof (FcCaseFold));
if (!folds)
panic ("out of memory");
return &folds[nfolds++];
}
static int
ucs4_to_utf8 (FcChar32 ucs4,
FcChar8 dest[FC_UTF8_MAX_LEN])
{
int bits;
FcChar8 *d = dest;
if (ucs4 < 0x80) { *d++= ucs4; bits= -6; }
else if (ucs4 < 0x800) { *d++= ((ucs4 >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (ucs4 < 0x10000) { *d++= ((ucs4 >> 12) & 0x0F) | 0xE0; bits= 6; }
else if (ucs4 < 0x200000) { *d++= ((ucs4 >> 18) & 0x07) | 0xF0; bits= 12; }
else if (ucs4 < 0x4000000) { *d++= ((ucs4 >> 24) & 0x03) | 0xF8; bits= 18; }
else if (ucs4 < 0x80000000) { *d++= ((ucs4 >> 30) & 0x01) | 0xFC; bits= 24; }
else return 0;
for ( ; bits >= 0; bits-= 6) {
*d++= ((ucs4 >> bits) & 0x3F) | 0x80;
}
return d - dest;
}
static int
utf8_size (FcChar32 ucs4)
{
FcChar8 utf8[FC_UTF8_MAX_LEN];
return ucs4_to_utf8 (ucs4, utf8 );
}
static FcChar8 *foldChars;
static int nfoldChars;
static int maxFoldChars;
static FcChar32 minFoldChar;
static FcChar32 maxFoldChar;
static void
addChar (FcChar32 c)
{
FcChar8 utf8[FC_UTF8_MAX_LEN];
int len;
int i;
len = ucs4_to_utf8 (c, utf8);
if (foldChars)
foldChars = realloc (foldChars, (nfoldChars + len) * sizeof (FcChar8));
else
foldChars = malloc (sizeof (FcChar8) * len);
if (!foldChars)
panic ("out of memory");
for (i = 0; i < len; i++)
foldChars[nfoldChars + i] = utf8[i];
nfoldChars += len;
}
static int
foldExtends (FcCaseFold *fold, CaseFoldRaw *raw)
{
switch (fold->method) {
case FC_CASE_FOLD_RANGE:
if ((short) (raw->lower[0] - raw->upper) != fold->offset)
return 0;
if (raw->upper != fold->upper + fold->count)
return 0;
return 1;
case FC_CASE_FOLD_EVEN_ODD:
if ((short) (raw->lower[0] - raw->upper) != 1)
return 0;
if (raw->upper != fold->upper + fold->count + 1)
return 0;
return 1;
case FC_CASE_FOLD_FULL:
break;
}
return 0;
}
static const char *
case_fold_method_name (FcChar16 method)
{
switch (method) {
case FC_CASE_FOLD_RANGE: return "FC_CASE_FOLD_RANGE,";
case FC_CASE_FOLD_EVEN_ODD: return "FC_CASE_FOLD_EVEN_ODD,";
case FC_CASE_FOLD_FULL: return "FC_CASE_FOLD_FULL,";
default: return "unknown";
}
}
static void
dump (void)
{
int i;
printf ( "#define FC_NUM_CASE_FOLD %d\n", nfolds);
printf ( "#define FC_NUM_CASE_FOLD_CHARS %d\n", nfoldChars);
printf ( "#define FC_MAX_CASE_FOLD_CHARS %d\n", maxFoldChars);
printf ( "#define FC_MAX_CASE_FOLD_EXPAND %d\n", maxExpand);
printf ( "#define FC_MIN_FOLD_CHAR 0x%08x\n", minFoldChar);
printf ( "#define FC_MAX_FOLD_CHAR 0x%08x\n", maxFoldChar);
printf ( "\n");
/*
* Dump out ranges
*/
printf ("static const FcCaseFold fcCaseFold[FC_NUM_CASE_FOLD] = {\n");
for (i = 0; i < nfolds; i++)
{
printf (" { 0x%08x, %-22s 0x%04x, %6d },\n",
folds[i].upper, case_fold_method_name (folds[i].method),
folds[i].count, folds[i].offset);
}
printf ("};\n\n");
/*
* Dump out "other" values
*/
printf ("static const FcChar8 fcCaseFoldChars[FC_NUM_CASE_FOLD_CHARS] = {\n");
for (i = 0; i < nfoldChars; i++)
{
printf ("0x%02x", foldChars[i]);
if (i != nfoldChars - 1)
{
if ((i & 0xf) == 0xf)
printf (",\n");
else
printf (",");
}
}
printf ("\n};\n");
}
/*
* Read the standard Unicode CaseFolding.txt file
*/
#define SEP "; \t\n"
static int
parseRaw (char *line, CaseFoldRaw *raw)
{
char *tok, *end;
int i;
if (!isxdigit (line[0]))
return 0;
/*
* Get upper case value
*/
tok = strtok (line, SEP);
if (!tok || tok[0] == '#')
return 0;
raw->upper = strtol (tok, &end, 16);
if (end == tok)
return 0;
/*
* Get class
*/
tok = strtok (NULL, SEP);
if (!tok || tok[0] == '#')
return 0;
for (i = 0; caseFoldClassMap[i].name; i++)
if (!strcmp (tok, caseFoldClassMap[i].name))
{
raw->class = caseFoldClassMap[i].class;
break;
}
if (!caseFoldClassMap[i].name)
return 0;
/*
* Get list of result characters
*/
for (i = 0; i < MAX_OUT; i++)
{
tok = strtok (NULL, SEP);
if (!tok || tok[0] == '#')
break;
raw->lower[i] = strtol (tok, &end, 16);
if (end == tok)
break;
}
if (i == 0)
return 0;
raw->nout = i;
return 1;
}
static int
caseFoldReadRaw (FILE *in, CaseFoldRaw *raw)
{
char line[MAX_LINE];
for (;;)
{
if (!fgets (line, sizeof (line) - 1, in))
return 0;
if (parseRaw (line, raw))
return 1;
}
}
int
main (int argc, char **argv)
{
FcCaseFold *fold = 0;
CaseFoldRaw raw;
int i;
FILE *caseFile;
char line[MAX_LINE];
int expand;
if (argc != 2)
panic ("usage: fc-case CaseFolding.txt");
caseFile = fopen (argv[1], "r");
if (!caseFile)
panic ("can't open case folding file");
while (caseFoldReadRaw (caseFile, &raw))
{
if (!minFoldChar)
minFoldChar = raw.upper;
maxFoldChar = raw.upper;
switch (raw.class) {
case CaseFoldCommon:
case CaseFoldFull:
if (raw.nout == 1)
{
if (fold && foldExtends (fold, &raw))
fold->count = raw.upper - fold->upper + 1;
else
{
fold = addFold ();
fold->upper = raw.upper;
fold->offset = raw.lower[0] - raw.upper;
if (fold->offset == 1)
fold->method = FC_CASE_FOLD_EVEN_ODD;
else
fold->method = FC_CASE_FOLD_RANGE;
fold->count = 1;
}
expand = utf8_size (raw.lower[0]) - utf8_size(raw.upper);
}
else
{
fold = addFold ();
fold->upper = raw.upper;
fold->method = FC_CASE_FOLD_FULL;
fold->offset = nfoldChars;
for (i = 0; i < raw.nout; i++)
addChar (raw.lower[i]);
fold->count = nfoldChars - fold->offset;
if (fold->count > maxFoldChars)
maxFoldChars = fold->count;
expand = fold->count - utf8_size (raw.upper);
}
if (expand > maxExpand)
maxExpand = expand;
break;
case CaseFoldSimple:
break;
case CaseFoldTurkic:
break;
}
}
/*
* Scan the input until the marker is found
*/
while (fgets (line, sizeof (line), stdin))
{
if (!strncmp (line, "@@@", 3))
break;
fputs (line, stdout);
}
/*
* Dump these tables
*/
dump ();
/*
* And flush out the rest of the input file
*/
while (fgets (line, sizeof (line), stdin))
fputs (line, stdout);
fflush (stdout);
exit (ferror (stdout));
}
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