First stab at globbing extension.
This commit is contained in:
Ryan C. Gordon
parent
4454511ca0
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6f3eda601e
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/** \file globbing.c */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "physfs.h"
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#include "globbing.h"
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/**
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* Please see globbing.h for details.
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*
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* License: this code is public domain. I make no warranty that it is useful,
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* correct, harmless, or environmentally safe.
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*
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* This particular file may be used however you like, including copying it
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* verbatim into a closed-source project, exploiting it commercially, and
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* removing any trace of my name from the source (although I hope you won't
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* 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.
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*
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* Unless otherwise stated, the rest of PhysicsFS falls under the GNU Lesser
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* General Public License: http://www.gnu.org/licenses/lgpl.txt
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*
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* \author Ryan C. Gordon.
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*/
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static int matchesPattern(const char *fname, const char *wildcard,
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int caseSensitive)
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{
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char x, y;
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const char *fnameptr = fname;
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const char *wildptr = wildcard;
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while ((*wildptr) && (*fnameptr))
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{
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y = *wildptr;
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if (y == '*')
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{
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wildptr++;
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y = (caseSensitive) ? *wildptr : (char) tolower(*wildptr);
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while (1)
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{
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x = (caseSensitive) ? *fnameptr : (char) tolower(*fnameptr);
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if ((!x) || (x == y))
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break;
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else
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fnameptr++;
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} /* while */
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} /* if */
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else if (y == '?')
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{
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wildptr++;
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fnameptr++;
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} /* else if */
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else
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{
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if (caseSensitive)
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x = *fnameptr;
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else
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{
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x = tolower(*fnameptr);
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y = tolower(y);
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} /* if */
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wildptr++;
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fnameptr++;
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if (x != y)
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return(0);
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} /* else */
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} /* while */
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return(*fnameptr == *wildptr);
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} /* matchesPattern */
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char **PHYSFSEXT_enumerateFilesWildcard(const char *dir, const char *wildcard,
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int caseSensitive)
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{
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char **rc = PHYSFS_enumerateFiles(dir);
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char **i = rc;
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char **j;
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while (*i != NULL)
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{
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if (matchesPattern(*i, wildcard, caseSensitive))
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i++;
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else
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{
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/* FIXME: This counts on physfs's allocation method not changing! */
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free(*i);
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for (j = i; *j != NULL; j++)
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j[0] = j[1];
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} /* else */
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} /* for */
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return(rc);
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} /* PHYSFSEXT_enumerateFilesWildcard */
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#ifdef TEST_PHYSFSEXT_ENUMERATEFILESWILDCARD
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int main(int argc, char **argv)
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{
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int rc;
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char **flist;
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char **i;
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if (argc != 3)
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{
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printf("USAGE: %s <pattern> <caseSen>\n"
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" where <caseSen> is 1 or 0.\n", argv[0]);
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return(1);
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} /* if */
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if (!PHYSFS_init(argv[0]))
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{
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fprintf(stderr, "PHYSFS_init(): %s\n", PHYSFS_getLastError());
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return(1);
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} /* if */
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if (!PHYSFS_addToSearchPath(".", 1))
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{
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fprintf(stderr, "PHYSFS_addToSearchPath(): %s\n", PHYSFS_getLastError());
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PHYSFS_deinit();
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return(1);
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} /* if */
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flist = PHYSFSEXT_enumerateFilesWildcard("/", argv[1], atoi(argv[2]));
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rc = 0;
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for (i = flist; *i; i++)
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{
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printf("%s\n", *i);
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rc++;
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} /* for */
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printf("\n total %d files.\n\n", rc);
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PHYSFS_freeList(flist);
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PHYSFS_deinit();
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return(0);
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} /* main */
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#endif
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/* end of globbing.c ... */
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@ -0,0 +1,76 @@
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/** \file globbing.h */
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/**
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* \mainpage PhysicsFS globbing
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*
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* This is an extension to PhysicsFS to let you search for files with basic
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* wildcard matching, regardless of what sort of filesystem or archive they
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* reside in. It does this by enumerating directories as needed and manually
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* locating matching entries.
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*
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* Usage: Set up PhysicsFS as you normally would, then use
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* PHYSFSEXT_enumerateFilesPattern() when enumerating files. This is just
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* like PHYSFS_enumerateFiles(), but it returns a subset that matches your
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* wildcard pattern. You must call PHYSFS_freeList() on the results, just
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* like you would with PHYSFS_enumerateFiles().
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*
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* License: this code is public domain. I make no warranty that it is useful,
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* correct, harmless, or environmentally safe.
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*
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* This particular file may be used however you like, including copying it
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* verbatim into a closed-source project, exploiting it commercially, and
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* removing any trace of my name from the source (although I hope you won't
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* 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.
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*
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* Unless otherwise stated, the rest of PhysicsFS falls under the GNU Lesser
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* General Public License: http://www.gnu.org/licenses/lgpl.txt
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*
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* \author Ryan C. Gordon.
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*/
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/**
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* \fn char **PHYSFS_enumerateFilesWildcard(const char *dir, const char *wildcard, int caseSensitive)
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* \brief Get a file listing of a search path's directory.
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*
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* Matching directories are interpolated. That is, if "C:\mydir" is in the
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* search path and contains a directory "savegames" that contains "x.sav",
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* "y.Sav", and "z.txt", and there is also a "C:\userdir" in the search path
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* that has a "savegames" subdirectory with "w.sav", then the following code:
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*
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* \code
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* char **rc = PHYSFS_enumerateFilesWildcard("savegames", "*.sav", 0);
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* char **i;
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*
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* for (i = rc; *i != NULL; i++)
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* printf(" * We've got [%s].\n", *i);
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*
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* PHYSFS_freeList(rc);
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* \endcode
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*
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* ...will print:
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*
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* \verbatim
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* We've got [x.sav].
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* We've got [y.Sav].
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* We've got [w.sav].\endverbatim
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*
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* Feel free to sort the list however you like. We only promise there will
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* be no duplicates, but not what order the final list will come back in.
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*
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* Wildcard strings can use the '*' and '?' characters, currently.
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* Matches can be case-insensitive if you pass a zero for argument 3.
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*
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* Don't forget to call PHYSFS_freeList() with the return value from this
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* function when you are done with it.
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*
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* \param dir directory in platform-independent notation to enumerate.
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* \return Null-terminated array of null-terminated strings.
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*/
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__EXPORT__ char **PHYSFSEXT_enumerateFilesWildcard(const char *dir,
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const char *wildcard,
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int caseSensitive);
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/* end of globbing.h ... */
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