globbing.c
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/** \file globbing.c */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
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#include <assert.h>
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#include "globbing.h"
/**
* Please see globbing.h for details.
*
* License: this code is public domain. I make no warranty that it is useful,
* correct, harmless, or environmentally safe.
*
* This particular file may be used however you like, including copying it
* verbatim into a closed-source project, exploiting it commercially, and
* removing any trace of my name from the source (although I hope you won't
* do that). I welcome enhancements and corrections to this file, but I do
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* not require you to send me patches if you make changes. This code has
* NO WARRANTY.
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* Unless otherwise stated, the rest of PhysicsFS falls under the zlib license.
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* Please see the file LICENSE.txt in the source's root directory.
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*
* \author Ryan C. Gordon.
*/
static int matchesPattern(const char *fname, const char *wildcard,
int caseSensitive)
{
char x, y;
const char *fnameptr = fname;
const char *wildptr = wildcard;
while ((*wildptr) && (*fnameptr))
{
y = *wildptr;
if (y == '*')
{
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do
{
wildptr++; /* skip multiple '*' in a row... */
} while (*wildptr == '*');
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y = (caseSensitive) ? *wildptr : (char) tolower(*wildptr);
while (1)
{
x = (caseSensitive) ? *fnameptr : (char) tolower(*fnameptr);
if ((!x) || (x == y))
break;
else
fnameptr++;
} /* while */
} /* if */
else if (y == '?')
{
wildptr++;
fnameptr++;
} /* else if */
else
{
if (caseSensitive)
x = *fnameptr;
else
{
x = tolower(*fnameptr);
y = tolower(y);
} /* if */
wildptr++;
fnameptr++;
if (x != y)
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} /* else */
} /* while */
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while (*wildptr == '*')
wildptr++;
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return (*fnameptr == *wildptr);
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} /* matchesPattern */
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typedef struct
{
const PHYSFS_Allocator *allocator;
const char *wildcard;
int caseSensitive;
PHYSFS_EnumFilesCallback callback;
void *origData;
} WildcardCallbackData;
/*
* This callback sits between the enumerator and the enduser callback,
* filtering out files that don't match the wildcard pattern.
*/
static void wildcardCallback(void *_d, const char *origdir, const char *fname)
{
const WildcardCallbackData *data = (const WildcardCallbackData *) _d;
if (matchesPattern(fname, data->wildcard, data->caseSensitive))
data->callback(data->origData, origdir, fname);
} /* wildcardCallback */
void PHYSFSEXT_enumerateFilesCallbackWildcard(const char *dir,
const char *wildcard,
int caseSensitive,
PHYSFS_EnumFilesCallback c,
void *d)
{
WildcardCallbackData data;
data.allocator = PHYSFS_getAllocator();
data.wildcard = wildcard;
data.caseSensitive = caseSensitive;
data.callback = c;
data.origData = d;
PHYSFS_enumerateFilesCallback(dir, wildcardCallback, &data);
} /* PHYSFSEXT_enumerateFilesCallbackWildcard */
void PHYSFSEXT_freeEnumeration(char **list)
{
const PHYSFS_Allocator *allocator = PHYSFS_getAllocator();
int i;
if (list != NULL)
{
for (i = 0; list[i] != NULL; i++)
allocator->Free(list[i]);
allocator->Free(list);
} /* if */
} /* PHYSFSEXT_freeEnumeration */
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char **PHYSFSEXT_enumerateFilesWildcard(const char *dir, const char *wildcard,
int caseSensitive)
{
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const PHYSFS_Allocator *allocator = PHYSFS_getAllocator();
char **list = PHYSFS_enumerateFiles(dir);
char **retval = NULL;
int totalmatches = 0;
int matches = 0;
char **i;
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for (i = list; *i != NULL; i++)
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#if 0
printf("matchesPattern: '%s' vs '%s' (%s) ... %s\n", *i, wildcard,
caseSensitive ? "case" : "nocase",
matchesPattern(*i, wildcard, caseSensitive) ? "true" : "false");
#endif
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if (matchesPattern(*i, wildcard, caseSensitive))
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totalmatches++;
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} /* for */
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retval = (char **) allocator->Malloc(sizeof (char *) * (totalmatches+1));
if (retval != NULL)
{
for (i = list; ((matches < totalmatches) && (*i != NULL)); i++)
{
if (matchesPattern(*i, wildcard, caseSensitive))
{
retval[matches] = (char *) allocator->Malloc(strlen(*i) + 1);
if (retval[matches] == NULL)
{
while (matches--)
allocator->Free(retval[matches]);
allocator->Free(retval);
retval = NULL;
break;
} /* if */
strcpy(retval[matches], *i);
matches++;
} /* if */
} /* for */
if (retval != NULL)
{
assert(totalmatches == matches);
retval[matches] = NULL;
} /* if */
} /* if */
PHYSFS_freeList(list);
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return retval;
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} /* PHYSFSEXT_enumerateFilesWildcard */
#ifdef TEST_PHYSFSEXT_ENUMERATEFILESWILDCARD
int main(int argc, char **argv)
{
int rc;
char **flist;
char **i;
if (argc != 3)
{
printf("USAGE: %s <pattern> <caseSen>\n"
" where <caseSen> is 1 or 0.\n", argv[0]);
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} /* if */
if (!PHYSFS_init(argv[0]))
{
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fprintf(stderr, "PHYSFS_init(): %s\n", PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
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} /* if */
if (!PHYSFS_addToSearchPath(".", 1))
{
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fprintf(stderr, "PHYSFS_addToSearchPath(): %s\n", PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
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PHYSFS_deinit();
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} /* if */
flist = PHYSFSEXT_enumerateFilesWildcard("/", argv[1], atoi(argv[2]));
rc = 0;
for (i = flist; *i; i++)
{
printf("%s\n", *i);
rc++;
} /* for */
printf("\n total %d files.\n\n", rc);
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PHYSFSEXT_freeEnumeration(flist);
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PHYSFS_deinit();
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} /* main */
#endif
/* end of globbing.c ... */