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ff919f9 @mhagger string_list: add two new functions for splitting strings
mhagger authored Sep 12, 2012
1 #include "cache.h"
2 #include "string-list.h"
3
eb5f0c7 @mhagger string_list: add a new function, filter_string_list()
mhagger authored Sep 12, 2012
4 /*
5 * Parse an argument into a string list. arg should either be a
6 * ':'-separated list of strings, or "-" to indicate an empty string
7 * list (as opposed to "", which indicates a string list containing a
8 * single empty string). list->strdup_strings must be set.
9 */
6511987 test-string-list.c: Fix some sparse warnings
Ramsay Jones authored Sep 15, 2012
10 static void parse_string_list(struct string_list *list, const char *arg)
eb5f0c7 @mhagger string_list: add a new function, filter_string_list()
mhagger authored Sep 12, 2012
11 {
12 if (!strcmp(arg, "-"))
13 return;
14
15 (void)string_list_split(list, arg, ':', -1);
16 }
17
6511987 test-string-list.c: Fix some sparse warnings
Ramsay Jones authored Sep 15, 2012
18 static void write_list(const struct string_list *list)
ff919f9 @mhagger string_list: add two new functions for splitting strings
mhagger authored Sep 12, 2012
19 {
20 int i;
21 for (i = 0; i < list->nr; i++)
22 printf("[%d]: \"%s\"\n", i, list->items[i].string);
23 }
24
6511987 test-string-list.c: Fix some sparse warnings
Ramsay Jones authored Sep 15, 2012
25 static void write_list_compact(const struct string_list *list)
eb5f0c7 @mhagger string_list: add a new function, filter_string_list()
mhagger authored Sep 12, 2012
26 {
27 int i;
28 if (!list->nr)
29 printf("-\n");
30 else {
31 printf("%s", list->items[0].string);
32 for (i = 1; i < list->nr; i++)
33 printf(":%s", list->items[i].string);
34 printf("\n");
35 }
36 }
37
6511987 test-string-list.c: Fix some sparse warnings
Ramsay Jones authored Sep 15, 2012
38 static int prefix_cb(struct string_list_item *item, void *cb_data)
eb5f0c7 @mhagger string_list: add a new function, filter_string_list()
mhagger authored Sep 12, 2012
39 {
40 const char *prefix = (const char *)cb_data;
41 return !prefixcmp(item->string, prefix);
42 }
43
ff919f9 @mhagger string_list: add two new functions for splitting strings
mhagger authored Sep 12, 2012
44 int main(int argc, char **argv)
45 {
46 if (argc == 5 && !strcmp(argv[1], "split")) {
47 struct string_list list = STRING_LIST_INIT_DUP;
48 int i;
49 const char *s = argv[2];
50 int delim = *argv[3];
51 int maxsplit = atoi(argv[4]);
52
53 i = string_list_split(&list, s, delim, maxsplit);
54 printf("%d\n", i);
55 write_list(&list);
56 string_list_clear(&list, 0);
57 return 0;
58 }
59
60 if (argc == 5 && !strcmp(argv[1], "split_in_place")) {
61 struct string_list list = STRING_LIST_INIT_NODUP;
62 int i;
63 char *s = xstrdup(argv[2]);
64 int delim = *argv[3];
65 int maxsplit = atoi(argv[4]);
66
67 i = string_list_split_in_place(&list, s, delim, maxsplit);
68 printf("%d\n", i);
69 write_list(&list);
70 string_list_clear(&list, 0);
71 free(s);
72 return 0;
73 }
74
eb5f0c7 @mhagger string_list: add a new function, filter_string_list()
mhagger authored Sep 12, 2012
75 if (argc == 4 && !strcmp(argv[1], "filter")) {
76 /*
77 * Retain only the items that have the specified prefix.
78 * Arguments: list|- prefix
79 */
80 struct string_list list = STRING_LIST_INIT_DUP;
81 const char *prefix = argv[3];
82
83 parse_string_list(&list, argv[2]);
84 filter_string_list(&list, 0, prefix_cb, (void *)prefix);
85 write_list_compact(&list);
86 string_list_clear(&list, 0);
87 return 0;
88 }
89
31d5451 @mhagger string_list: add a new function, string_list_remove_duplicates()
mhagger authored Sep 12, 2012
90 if (argc == 3 && !strcmp(argv[1], "remove_duplicates")) {
91 struct string_list list = STRING_LIST_INIT_DUP;
92
93 parse_string_list(&list, argv[2]);
94 string_list_remove_duplicates(&list, 0);
95 write_list_compact(&list);
96 string_list_clear(&list, 0);
97 return 0;
98 }
99
f103f95 @mhagger string_list: add a function string_list_longest_prefix()
mhagger authored Sep 12, 2012
100 if (argc == 4 && !strcmp(argv[1], "longest_prefix")) {
101 /* arguments: <colon-separated-prefixes>|- <string> */
102 struct string_list prefixes = STRING_LIST_INIT_DUP;
103 int retval;
104 const char *prefix_string = argv[2];
105 const char *string = argv[3];
106 const char *match;
107
108 parse_string_list(&prefixes, prefix_string);
109 match = string_list_longest_prefix(&prefixes, string);
110 if (match) {
111 printf("%s\n", match);
112 retval = 0;
113 }
114 else
115 retval = 1;
116 string_list_clear(&prefixes, 0);
117 return retval;
118 }
119
ff919f9 @mhagger string_list: add two new functions for splitting strings
mhagger authored Sep 12, 2012
120 fprintf(stderr, "%s: unknown function name: %s\n", argv[0],
121 argv[1] ? argv[1] : "(there was none)");
122 return 1;
123 }
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