filematch.c

   1
   2 #ifdef WIN32
   3 #include <windows.h>
   4 #else
   5 #include <dirent.h>
   6 #endif
   7
   8 #include "quakedef.h"
   9
  10 // LordHavoc: some portable directory listing code I wrote for lmp2pcx, now used in darkplaces to load id1/*.pak and such...
  11
  12 int matchpattern(const char *in, const char *pattern, int caseinsensitive)
  13 {
  14         return matchpattern_with_separator(in, pattern, caseinsensitive, "/\\:", false);
  15 }
  16
  17 // wildcard_least_one: if true * matches 1 or more characters
  18 //                     if false * matches 0 or more characters
  19 int matchpattern_with_separator(const char *in, const char *pattern, int caseinsensitive, const char *separators, qboolean wildcard_least_one)
  20 {
  21         int c1, c2;
  22         while (*pattern)
  23         {
  24                 switch (*pattern)
  25                 {
  26                 case 0:
  27                         return 1; // end of pattern
  28                 case '?': // match any single character
  29                         if (*in == 0 || strchr(separators, *in))
  30                                 return 0; // no match
  31                         in++;
  32                         pattern++;
  33                         break;
  34                 case '*': // match anything until following string
  35                         if(wildcard_least_one)
  36                         {
  37                                 if (*in == 0 || strchr(separators, *in))
  38                                         return 0; // no match
  39                                 in++;
  40                         }
  41                         pattern++;
  42                         while (*in)
  43                         {
  44                                 if (strchr(separators, *in))
  45                                         break;
  46                                 // see if pattern matches at this offset
  47                                 if (matchpattern_with_separator(in, pattern, caseinsensitive, separators, wildcard_least_one))
  48                                         return 1;
  49                                 // nope, advance to next offset
  50                                 in++;
  51                         }
  52                         break;
  53                 default:
  54                         if (*in != *pattern)
  55                         {
  56                                 if (!caseinsensitive)
  57                                         return 0; // no match
  58                                 c1 = *in;
  59                                 if (c1 >= 'A' && c1 <= 'Z')
  60                                         c1 += 'a' - 'A';
  61                                 c2 = *pattern;
  62                                 if (c2 >= 'A' && c2 <= 'Z')
  63                                         c2 += 'a' - 'A';
  64                                 if (c1 != c2)
  65                                         return 0; // no match
  66                         }
  67                         in++;
  68                         pattern++;
  69                         break;
  70                 }
  71         }
  72         if (*in)
  73                 return 0; // reached end of pattern but not end of input
  74         return 1; // success
  75 }
  76
  77 // a little strings system
  78 void stringlistinit(stringlist_t *list)
  79 {
  80         memset(list, 0, sizeof(*list));
  81 }
  82
  83 void stringlistfreecontents(stringlist_t *list)
  84 {
  85         int i;
  86         for (i = 0;i < list->numstrings;i++)
  87         {
  88                 if (list->strings[i])
  89                         Z_Free(list->strings[i]);
  90                 list->strings[i] = NULL;
  91         }
  92         list->numstrings = 0;
  93         list->maxstrings = 0;
  94         if (list->strings)
  95                 Z_Free(list->strings);
  96         list->strings = NULL;
  97 }
  98
  99 void stringlistappend(stringlist_t *list, const char *text)
 100 {
 101         size_t textlen;
 102         char **oldstrings;
 103
 104         if (list->numstrings >= list->maxstrings)
 105         {
 106                 oldstrings = list->strings;
 107                 list->maxstrings += 4096;
 108                 list->strings = (char **) Z_Malloc(list->maxstrings * sizeof(*list->strings));
 109                 if (list->numstrings)
 110                         memcpy(list->strings, oldstrings, list->numstrings * sizeof(*list->strings));
 111                 if (oldstrings)
 112                         Z_Free(oldstrings);
 113         }
 114         textlen = strlen(text) + 1;
 115         list->strings[list->numstrings] = (char *) Z_Malloc(textlen);
 116         memcpy(list->strings[list->numstrings], text, textlen);
 117         list->numstrings++;
 118 }
 119
 120 static int stringlistsort_cmp(const void *a, const void *b)
 121 {
 122         return strcasecmp(*(const char **)a, *(const char **)b);
 123 }
 124
 125 void stringlistsort(stringlist_t *list, qboolean uniq)
 126 {
 127         int i, j;
 128         if(list->numstrings < 1)
 129                 return;
 130         qsort(&list->strings[0], list->numstrings, sizeof(list->strings[0]), stringlistsort_cmp);
 131         if(uniq)
 132         {
 133                 // i: the item to read
 134                 // j: the item last written
 135                 for (i = 1, j = 0; i < list->numstrings; ++i)
 136                 {
 137                         char *save;
 138                         if(!strcasecmp(list->strings[i], list->strings[j]))
 139                                 continue;
 140                         ++j;
 141                         save = list->strings[j];
 142                         list->strings[j] = list->strings[i];
 143                         list->strings[i] = save;
 144                 }
 145                 for(i = j+1; i < list->numstrings; ++i)
 146                 {
 147                         if (list->strings[i])
 148                                 Z_Free(list->strings[i]);
 149                 }
 150                 list->numstrings = j+1;
 151         }
 152 }
 153
 154 // operating system specific code
 155 static void adddirentry(stringlist_t *list, const char *path, const char *name)
 156 {
 157         if (strcmp(name, ".") && strcmp(name, ".."))
 158         {
 159                 char temp[MAX_OSPATH];
 160                 dpsnprintf( temp, sizeof( temp ), "%s%s", path, name );
 161                 stringlistappend(list, temp);
 162         }
 163 }
 164 #ifdef WIN32
 165 void listdirectory(stringlist_t *list, const char *basepath, const char *path)
 166 {
 167         int i;
 168         char pattern[4096], *c;
 169         WIN32_FIND_DATA n_file;
 170         HANDLE hFile;
 171         strlcpy (pattern, basepath, sizeof(pattern));
 172         strlcat (pattern, path, sizeof (pattern));
 173         strlcat (pattern, "*", sizeof (pattern));
 174         // ask for the directory listing handle
 175         hFile = FindFirstFile(pattern, &n_file);
 176         if(hFile == INVALID_HANDLE_VALUE)
 177                 return;
 178         do {
 179                 adddirentry(list, path, n_file.cFileName);
 180         } while (FindNextFile(hFile, &n_file) != 0);
 181         FindClose(hFile);
 182
 183         // convert names to lowercase because windows does not care, but pattern matching code often does
 184         for (i = 0;i < list->numstrings;i++)
 185                 for (c = list->strings[i];*c;c++)
 186                         if (*c >= 'A' && *c <= 'Z')
 187                                 *c += 'a' - 'A';
 188 }
 189 #else
 190 void listdirectory(stringlist_t *list, const char *basepath, const char *path)
 191 {
 192         char fullpath[MAX_OSPATH];
 193         DIR *dir;
 194         struct dirent *ent;
 195         dpsnprintf(fullpath, sizeof(fullpath), "%s%s", basepath, *path ? path : "./");
 196         dir = opendir(fullpath);
 197         if (!dir)
 198                 return;
 199         while ((ent = readdir(dir)))
 200                 adddirentry(list, path, ent->d_name);
 201         closedir(dir);
 202 }
 203 #endif
 204