git.oblomov.eu Git - git/blob - alias.c

   1 #include "cache.h"
   2
   3 char *alias_lookup(const char *alias)
   4 {
   5         char *v = NULL;
   6         struct strbuf key = STRBUF_INIT;
   7         strbuf_addf(&key, "alias.%s", alias);
   8         if (git_config_key_is_valid(key.buf))
   9                 git_config_get_string(key.buf, &v);
  10         strbuf_release(&key);
  11         return v;
  12 }
  13
  14 #define SPLIT_CMDLINE_BAD_ENDING 1
  15 #define SPLIT_CMDLINE_UNCLOSED_QUOTE 2
  16 static const char *split_cmdline_errors[] = {
  17         "cmdline ends with \\",
  18         "unclosed quote"
  19 };
  20
  21 int split_cmdline(char *cmdline, const char ***argv)
  22 {
  23         int src, dst, count = 0, size = 16;
  24         char quoted = 0;
  25
  26         *argv = xmalloc(sizeof(**argv) * size);
  27
  28         /* split alias_string */
  29         (*argv)[count++] = cmdline;
  30         for (src = dst = 0; cmdline[src];) {
  31                 char c = cmdline[src];
  32                 if (!quoted && isspace(c)) {
  33                         cmdline[dst++] = 0;
  34                         while (cmdline[++src]
  35                                         && isspace(cmdline[src]))
  36                                 ; /* skip */
  37                         ALLOC_GROW(*argv, count + 1, size);
  38                         (*argv)[count++] = cmdline + dst;
  39                 } else if (!quoted && (c == '\'' || c == '"')) {
  40                         quoted = c;
  41                         src++;
  42                 } else if (c == quoted) {
  43                         quoted = 0;
  44                         src++;
  45                 } else {
  46                         if (c == '\\' && quoted != '\'') {
  47                                 src++;
  48                                 c = cmdline[src];
  49                                 if (!c) {
  50                                         free(*argv);
  51                                         *argv = NULL;
  52                                         return -SPLIT_CMDLINE_BAD_ENDING;
  53                                 }
  54                         }
  55                         cmdline[dst++] = c;
  56                         src++;
  57                 }
  58         }
  59
  60         cmdline[dst] = 0;
  61
  62         if (quoted) {
  63                 free(*argv);
  64                 *argv = NULL;
  65                 return -SPLIT_CMDLINE_UNCLOSED_QUOTE;
  66         }
  67
  68         ALLOC_GROW(*argv, count + 1, size);
  69         (*argv)[count] = NULL;
  70
  71         return count;
  72 }
  73
  74 const char *split_cmdline_strerror(int split_cmdline_errno)
  75 {
  76         return split_cmdline_errors[-split_cmdline_errno - 1];
  77 }