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