alias.c

   1 #include "cache.h"
   2
   3 struct config_alias_data {
   4         const char *alias;
   5         char *v;
   6 };
   7
   8 static int config_alias_cb(const char *key, const char *value, void *d)
   9 {
  10         struct config_alias_data *data = d;
  11         const char *p;
  12
  13         if (skip_prefix(key, "alias.", &p) && !strcasecmp(p, data->alias))
  14                 return git_config_string((const char **)&data->v, key, value);
  15
  16         return 0;
  17 }
  18
  19 char *alias_lookup(const char *alias)
  20 {
  21         struct config_alias_data data = { alias, NULL };
  22
  23         read_early_config(config_alias_cb, &data);
  24
  25         return data.v;
  26 }
  27
  28 #define SPLIT_CMDLINE_BAD_ENDING 1
  29 #define SPLIT_CMDLINE_UNCLOSED_QUOTE 2
  30 static const char *split_cmdline_errors[] = {
  31         "cmdline ends with \\",
  32         "unclosed quote"
  33 };
  34
  35 int split_cmdline(char *cmdline, const char ***argv)
  36 {
  37         int src, dst, count = 0, size = 16;
  38         char quoted = 0;
  39
  40         ALLOC_ARRAY(*argv, size);
  41
  42         /* split alias_string */
  43         (*argv)[count++] = cmdline;
  44         for (src = dst = 0; cmdline[src];) {
  45                 char c = cmdline[src];
  46                 if (!quoted && isspace(c)) {
  47                         cmdline[dst++] = 0;
  48                         while (cmdline[++src]
  49                                         && isspace(cmdline[src]))
  50                                 ; /* skip */
  51                         ALLOC_GROW(*argv, count + 1, size);
  52                         (*argv)[count++] = cmdline + dst;
  53                 } else if (!quoted && (c == '\'' || c == '"')) {
  54                         quoted = c;
  55                         src++;
  56                 } else if (c == quoted) {
  57                         quoted = 0;
  58                         src++;
  59                 } else {
  60                         if (c == '\\' && quoted != '\'') {
  61                                 src++;
  62                                 c = cmdline[src];
  63                                 if (!c) {
  64                                         free(*argv);
  65                                         *argv = NULL;
  66                                         return -SPLIT_CMDLINE_BAD_ENDING;
  67                                 }
  68                         }
  69                         cmdline[dst++] = c;
  70                         src++;
  71                 }
  72         }
  73
  74         cmdline[dst] = 0;
  75
  76         if (quoted) {
  77                 free(*argv);
  78                 *argv = NULL;
  79                 return -SPLIT_CMDLINE_UNCLOSED_QUOTE;
  80         }
  81
  82         ALLOC_GROW(*argv, count + 1, size);
  83         (*argv)[count] = NULL;
  84
  85         return count;
  86 }
  87
  88 const char *split_cmdline_strerror(int split_cmdline_errno)
  89 {
  90         return split_cmdline_errors[-split_cmdline_errno - 1];
  91 }