WINGs/string.c

   1
   2 #include "wconfig.h"
   3
   4 #include <string.h>
   5 #include <stdlib.h>
   6 #include <ctype.h>
   7 #ifdef HAVE_BSD_STRING_H
   8 #include <bsd/string.h>
   9 #endif
  10
  11 #include "WUtil.h"
  12
  13 #define PRC_ALPHA       0
  14 #define PRC_BLANK       1
  15 #define PRC_ESCAPE      2
  16 #define PRC_DQUOTE      3
  17 #define PRC_EOS         4
  18 #define PRC_SQUOTE      5
  19
  20 typedef struct {
  21         short nstate;
  22         short output;
  23 } DFA;
  24
  25 static DFA mtable[9][6] = {
  26         {{3, 1}, {0, 0}, {4, 0}, {1, 0}, {8, 0}, {6, 0}},
  27         {{1, 1}, {1, 1}, {2, 0}, {3, 0}, {5, 0}, {1, 1}},
  28         {{1, 1}, {1, 1}, {1, 1}, {1, 1}, {5, 0}, {1, 1}},
  29         {{3, 1}, {5, 0}, {4, 0}, {1, 0}, {5, 0}, {6, 0}},
  30         {{3, 1}, {3, 1}, {3, 1}, {3, 1}, {5, 0}, {3, 1}},
  31         {{-1, -1}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}},     /* final state */
  32         {{6, 1}, {6, 1}, {7, 0}, {6, 1}, {5, 0}, {3, 0}},
  33         {{6, 1}, {6, 1}, {6, 1}, {6, 1}, {5, 0}, {6, 1}},
  34         {{-1, -1}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}},     /* final state */
  35 };
  36
  37 char *wtokennext(char *word, char **next)
  38 {
  39         char *ptr;
  40         char *ret, *t;
  41         int state, ctype;
  42
  43         t = ret = wmalloc(strlen(word) + 1);
  44         ptr = word;
  45
  46         state = 0;
  47         while (1) {
  48                 if (*ptr == 0)
  49                         ctype = PRC_EOS;
  50                 else if (*ptr == '\\')
  51                         ctype = PRC_ESCAPE;
  52                 else if (*ptr == '"')
  53                         ctype = PRC_DQUOTE;
  54                 else if (*ptr == '\'')
  55                         ctype = PRC_SQUOTE;
  56                 else if (*ptr == ' ' || *ptr == '\t')
  57                         ctype = PRC_BLANK;
  58                 else
  59                         ctype = PRC_ALPHA;
  60
  61                 if (mtable[state][ctype].output) {
  62                         *t = *ptr;
  63                         t++;
  64                         *t = 0;
  65                 }
  66                 state = mtable[state][ctype].nstate;
  67                 ptr++;
  68                 if (mtable[state][0].output < 0) {
  69                         break;
  70                 }
  71         }
  72
  73         if (*ret == 0)
  74                 t = NULL;
  75         else
  76                 t = wstrdup(ret);
  77
  78         wfree(ret);
  79
  80         if (ctype == PRC_EOS)
  81                 *next = NULL;
  82         else
  83                 *next = ptr;
  84
  85         return t;
  86 }
  87
  88 /* separate a string in tokens, taking " and ' into account */
  89 void wtokensplit(char *command, char ***argv, int *argc)
  90 {
  91         char *token, *line;
  92         int count;
  93
  94         count = 0;
  95         line = command;
  96         do {
  97                 token = wtokennext(line, &line);
  98                 if (token) {
  99                         if (count == 0)
 100                                 *argv = wmalloc(sizeof(char **));
 101                         else
 102                                 *argv = wrealloc(*argv, (count + 1) * sizeof(char **));
 103                         (*argv)[count++] = token;
 104                 }
 105         } while (token != NULL && line != NULL);
 106
 107         *argc = count;
 108 }
 109
 110 char *wtokenjoin(char **list, int count)
 111 {
 112         int i, j;
 113         char *flat_string, *wspace;
 114
 115         j = 0;
 116         for (i = 0; i < count; i++) {
 117                 if (list[i] != NULL && list[i][0] != 0) {
 118                         j += strlen(list[i]);
 119                         if (strpbrk(list[i], " \t"))
 120                                 j += 2;
 121                 }
 122         }
 123
 124         flat_string = wmalloc(j + count + 1);
 125
 126         for (i = 0; i < count; i++) {
 127                 if (list[i] != NULL && list[i][0] != 0) {
 128                         if (i > 0)
 129                                 strcat(flat_string, " ");
 130                         wspace = strpbrk(list[i], " \t");
 131                         if (wspace)
 132                                 strcat(flat_string, "\"");
 133                         strcat(flat_string, list[i]);
 134                         if (wspace)
 135                                 strcat(flat_string, "\"");
 136                 }
 137         }
 138
 139         return flat_string;
 140 }
 141
 142 void wtokenfree(char **tokens, int count)
 143 {
 144         while (count--)
 145                 wfree(tokens[count]);
 146         wfree(tokens);
 147 }
 148
 149 char *wtrimspace(const char *s)
 150 {
 151         char *t;
 152
 153         if (s == NULL)
 154                 return NULL;
 155
 156         while (isspace(*s) && *s)
 157                 s++;
 158         t = (char *)s + strlen(s) - 1;
 159         while (t > s && isspace(*t))
 160                 t--;
 161
 162         return wstrndup(s, t - s + 1);
 163 }
 164
 165 char *wstrdup(const char *str)
 166 {
 167         assert(str != NULL);
 168
 169         return strcpy(wmalloc(strlen(str) + 1), str);
 170 }
 171
 172 char *wstrndup(const char *str, size_t len)
 173 {
 174         char *copy;
 175
 176         assert(str != NULL);
 177
 178         len = WMIN(len, strlen(str));
 179         copy = strncpy(wmalloc(len + 1), str, len);
 180         copy[len] = 0;
 181
 182         return copy;
 183 }
 184
 185 char *wstrconcat(char *str1, char *str2)
 186 {
 187         char *str;
 188
 189         if (!str1)
 190                 return wstrdup(str2);
 191         else if (!str2)
 192                 return wstrdup(str1);
 193
 194         str = wmalloc(strlen(str1) + strlen(str2) + 1);
 195         strcpy(str, str1);
 196         strcat(str, str2);
 197
 198         return str;
 199 }
 200
 201 char *wstrappend(char *dst, char *src)
 202 {
 203         if (!dst)
 204                 return wstrdup(src);
 205         else if (!src || *src == 0)
 206                 return dst;
 207
 208         dst = wrealloc(dst, strlen(dst) + strlen(src) + 1);
 209         strcat(dst, src);
 210
 211         return dst;
 212 }
 213
 214
 215 #ifdef HAVE_STRLCAT
 216 size_t
 217 wstrlcat(char *dst, const char *src, size_t siz)
 218 {
 219         return strlcat(dst, src, siz);
 220 }
 221 #else
 222 /*      $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $      */
 223
 224 /*
 225  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 226  *
 227  * Permission to use, copy, modify, and distribute this software for any
 228  * purpose with or without fee is hereby granted, provided that the above
 229  * copyright notice and this permission notice appear in all copies.
 230  *
 231  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 232  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 233  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 234  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 235  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 236  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 237  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 238  */
 239
 240 /*
 241  * Appends src to string dst of size siz (unlike strncat, siz is the
 242  * full size of dst, not space left).  At most siz-1 characters
 243  * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
 244  * Returns strlen(src) + MIN(siz, strlen(initial dst)).
 245  * If retval >= siz, truncation occurred.
 246  */
 247 size_t
 248 wstrlcat(char *dst, const char *src, size_t siz)
 249 {
 250         char *d = dst;
 251         const char *s = src;
 252         size_t n = siz;
 253         size_t dlen;
 254
 255         /* Find the end of dst and adjust bytes left but don't go past end */
 256         while (n-- != 0 && *d != '\0')
 257                 d++;
 258         dlen = d - dst;
 259         n = siz - dlen;
 260
 261         if (n == 0)
 262                 return(dlen + strlen(s));
 263         while (*s != '\0') {
 264                 if (n != 1) {
 265                         *d++ = *s;
 266                         n--;
 267                 }
 268                 s++;
 269         }
 270         *d = '\0';
 271
 272         return(dlen + (s - src));       /* count does not include NUL */
 273 }
 274 #endif /* HAVE_STRLCAT */
 275
 276 #ifdef HAVE_STRLCPY
 277 size_t
 278 wstrlcpy(char *dst, const char *src, size_t siz)
 279 {
 280         return strlcpy(dst, src, siz);
 281 }
 282 #else
 283
 284 /*      $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $    */
 285
 286 /*
 287  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 288  *
 289  * Permission to use, copy, modify, and distribute this software for any
 290  * purpose with or without fee is hereby granted, provided that the above
 291  * copyright notice and this permission notice appear in all copies.
 292  *
 293  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 294  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 295  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 296  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 297  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 298  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 299  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 300  */
 301
 302 /*
 303  * Copy src to string dst of size siz.  At most siz-1 characters
 304  * will be copied.  Always NUL terminates (unless siz == 0).
 305  * Returns strlen(src); if retval >= siz, truncation occurred.
 306  */
 307 size_t
 308 wstrlcpy(char *dst, const char *src, size_t siz)
 309 {
 310         char *d = dst;
 311         const char *s = src;
 312         size_t n = siz;
 313
 314         /* Copy as many bytes as will fit */
 315         if (n != 0) {
 316                 while (--n != 0) {
 317                         if ((*d++ = *s++) == '\0')
 318                                 break;
 319                 }
 320         }
 321
 322         /* Not enough room in dst, add NUL and traverse rest of src */
 323         if (n == 0) {
 324                 if (siz != 0)
 325                         *d = '\0';              /* NUL-terminate dst */
 326                 while (*s++)
 327                         ;
 328         }
 329
 330         return(s - src - 1);    /* count does not include NUL */
 331 }
 332 #endif /* HAVE_STRLCPY */