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

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