obstack: avoid computing offsets from NULL pointer
[git] / builtin / column.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "config.h"
4 #include "strbuf.h"
5 #include "parse-options.h"
6 #include "string-list.h"
7 #include "column.h"
8
9 static const char * const builtin_column_usage[] = {
10         N_("git column [<options>]"),
11         NULL
12 };
13 static unsigned int colopts;
14
15 static int column_config(const char *var, const char *value, void *cb)
16 {
17         return git_column_config(var, value, cb, &colopts);
18 }
19
20 int cmd_column(int argc, const char **argv, const char *prefix)
21 {
22         struct string_list list = STRING_LIST_INIT_DUP;
23         struct strbuf sb = STRBUF_INIT;
24         struct column_options copts;
25         const char *command = NULL, *real_command = NULL;
26         struct option options[] = {
27                 OPT_STRING(0, "command", &real_command, N_("name"), N_("lookup config vars")),
28                 OPT_COLUMN(0, "mode", &colopts, N_("layout to use")),
29                 OPT_INTEGER(0, "raw-mode", &colopts, N_("layout to use")),
30                 OPT_INTEGER(0, "width", &copts.width, N_("Maximum width")),
31                 OPT_STRING(0, "indent", &copts.indent, N_("string"), N_("Padding space on left border")),
32                 OPT_INTEGER(0, "nl", &copts.nl, N_("Padding space on right border")),
33                 OPT_INTEGER(0, "padding", &copts.padding, N_("Padding space between columns")),
34                 OPT_END()
35         };
36
37         /* This one is special and must be the first one */
38         if (argc > 1 && starts_with(argv[1], "--command=")) {
39                 command = argv[1] + 10;
40                 git_config(column_config, (void *)command);
41         } else
42                 git_config(column_config, NULL);
43
44         memset(&copts, 0, sizeof(copts));
45         copts.padding = 1;
46         argc = parse_options(argc, argv, prefix, options, builtin_column_usage, 0);
47         if (argc)
48                 usage_with_options(builtin_column_usage, options);
49         if (real_command || command) {
50                 if (!real_command || !command || strcmp(real_command, command))
51                         die(_("--command must be the first argument"));
52         }
53         finalize_colopts(&colopts, -1);
54         while (!strbuf_getline(&sb, stdin))
55                 string_list_append(&list, sb.buf);
56
57         print_columns(&list, colopts, &copts);
58         return 0;
59 }