alias.c

   1 #include "cache.h"
   2 #include "alias.h"
   3 #include "config.h"
   4 #include "string-list.h"
   5
   6 struct config_alias_data {
   7         const char *alias;
   8         char *v;
   9         struct string_list *list;
  10 };
  11
  12 static int config_alias_cb(const char *key, const char *value, void *d)
  13 {
  14         struct config_alias_data *data = d;
  15         const char *p;
  16
  17         if (!skip_prefix(key, "alias.", &p))
  18                 return 0;
  19
  20         if (data->alias) {
  21                 if (!strcasecmp(p, data->alias))
  22                         return git_config_string((const char **)&data->v,
  23                                                  key, value);
  24         } else if (data->list) {
  25                 string_list_append(data->list, p);
  26         }
  27
  28         return 0;
  29 }
  30
  31 char *alias_lookup(const char *alias)
  32 {
  33         struct config_alias_data data = { alias, NULL };
  34
  35         read_early_config(config_alias_cb, &data);
  36
  37         return data.v;
  38 }
  39
  40 void list_aliases(struct string_list *list)
  41 {
  42         struct config_alias_data data = { NULL, NULL, list };
  43
  44         read_early_config(config_alias_cb, &data);
  45 }
  46
  47 #define SPLIT_CMDLINE_BAD_ENDING 1
  48 #define SPLIT_CMDLINE_UNCLOSED_QUOTE 2
  49 static const char *split_cmdline_errors[] = {
  50         N_("cmdline ends with \\"),
  51         N_("unclosed quote")
  52 };
  53
  54 int split_cmdline(char *cmdline, const char ***argv)
  55 {
  56         int src, dst, count = 0, size = 16;
  57         char quoted = 0;
  58
  59         ALLOC_ARRAY(*argv, size);
  60
  61         /* split alias_string */
  62         (*argv)[count++] = cmdline;
  63         for (src = dst = 0; cmdline[src];) {
  64                 char c = cmdline[src];
  65                 if (!quoted && isspace(c)) {
  66                         cmdline[dst++] = 0;
  67                         while (cmdline[++src]
  68                                         && isspace(cmdline[src]))
  69                                 ; /* skip */
  70                         ALLOC_GROW(*argv, count + 1, size);
  71                         (*argv)[count++] = cmdline + dst;
  72                 } else if (!quoted && (c == '\'' || c == '"')) {
  73                         quoted = c;
  74                         src++;
  75                 } else if (c == quoted) {
  76                         quoted = 0;
  77                         src++;
  78                 } else {
  79                         if (c == '\\' && quoted != '\'') {
  80                                 src++;
  81                                 c = cmdline[src];
  82                                 if (!c) {
  83                                         FREE_AND_NULL(*argv);
  84                                         return -SPLIT_CMDLINE_BAD_ENDING;
  85                                 }
  86                         }
  87                         cmdline[dst++] = c;
  88                         src++;
  89                 }
  90         }
  91
  92         cmdline[dst] = 0;
  93
  94         if (quoted) {
  95                 FREE_AND_NULL(*argv);
  96                 return -SPLIT_CMDLINE_UNCLOSED_QUOTE;
  97         }
  98
  99         ALLOC_GROW(*argv, count + 1, size);
 100         (*argv)[count] = NULL;
 101
 102         return count;
 103 }
 104
 105 const char *split_cmdline_strerror(int split_cmdline_errno)
 106 {
 107         return split_cmdline_errors[-split_cmdline_errno - 1];
 108 }