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

   1 #include "cache.h"
   2
   3 static const char *alias_key;
   4 static char *alias_val;
   5
   6 static int alias_lookup_cb(const char *k, const char *v, void *cb)
   7 {
   8         if (!prefixcmp(k, "alias.") && !strcmp(k + 6, alias_key)) {
   9                 if (!v)
  10                         return config_error_nonbool(k);
  11                 alias_val = xstrdup(v);
  12                 return 0;
  13         }
  14         return 0;
  15 }
  16
  17 char *alias_lookup(const char *alias)
  18 {
  19         alias_key = alias;
  20         alias_val = NULL;
  21         git_config(alias_lookup_cb, NULL);
  22         return alias_val;
  23 }
  24
  25 #define SPLIT_CMDLINE_BAD_ENDING 1
  26 #define SPLIT_CMDLINE_UNCLOSED_QUOTE 2
  27 static const char *split_cmdline_errors[] = {
  28         "cmdline ends with \\",
  29         "unclosed quote"
  30 };
  31
  32 int split_cmdline(char *cmdline, const char ***argv)
  33 {
  34         int src, dst, count = 0, size = 16;
  35         char quoted = 0;
  36
  37         *argv = xmalloc(sizeof(**argv) * size);
  38
  39         /* split alias_string */
  40         (*argv)[count++] = cmdline;
  41         for (src = dst = 0; cmdline[src];) {
  42                 char c = cmdline[src];
  43                 if (!quoted && isspace(c)) {
  44                         cmdline[dst++] = 0;
  45                         while (cmdline[++src]
  46                                         && isspace(cmdline[src]))
  47                                 ; /* skip */
  48                         ALLOC_GROW(*argv, count + 1, size);
  49                         (*argv)[count++] = cmdline + dst;
  50                 } else if (!quoted && (c == '\'' || c == '"')) {
  51                         quoted = c;
  52                         src++;
  53                 } else if (c == quoted) {
  54                         quoted = 0;
  55                         src++;
  56                 } else {
  57                         if (c == '\\' && quoted != '\'') {
  58                                 src++;
  59                                 c = cmdline[src];
  60                                 if (!c) {
  61                                         free(*argv);
  62                                         *argv = NULL;
  63                                         return -SPLIT_CMDLINE_BAD_ENDING;
  64                                 }
  65                         }
  66                         cmdline[dst++] = c;
  67                         src++;
  68                 }
  69         }
  70
  71         cmdline[dst] = 0;
  72
  73         if (quoted) {
  74                 free(*argv);
  75                 *argv = NULL;
  76                 return -SPLIT_CMDLINE_UNCLOSED_QUOTE;
  77         }
  78
  79         ALLOC_GROW(*argv, count + 1, size);
  80         (*argv)[count] = NULL;
  81
  82         return count;
  83 }
  84
  85 const char *split_cmdline_strerror(int split_cmdline_errno)
  86 {
  87         return split_cmdline_errors[-split_cmdline_errno - 1];
  88 }