Root/scripts/config/util.c

1/*
2 * Copyright (C) 2002-2005 Roman Zippel <zippel@linux-m68k.org>
3 * Copyright (C) 2002-2005 Sam Ravnborg <sam@ravnborg.org>
4 *
5 * Released under the terms of the GNU GPL v2.0.
6 */
7
8#include <string.h>
9#include "lkc.h"
10
11/* file already present in list? If not add it */
12struct file *file_lookup(const char *name)
13{
14    struct file *file;
15
16    for (file = file_list; file; file = file->next) {
17        if (!strcmp(name, file->name))
18            return file;
19    }
20
21    file = malloc(sizeof(*file));
22    memset(file, 0, sizeof(*file));
23    file->name = strdup(name);
24    file->next = file_list;
25    file_list = file;
26    return file;
27}
28
29/* Allocate initial growable sting */
30struct gstr str_new(void)
31{
32    struct gstr gs;
33    gs.s = malloc(sizeof(char) * 64);
34    gs.len = 16;
35    strcpy(gs.s, "\0");
36    return gs;
37}
38
39/* Allocate and assign growable string */
40struct gstr str_assign(const char *s)
41{
42    struct gstr gs;
43    gs.s = strdup(s);
44    gs.len = strlen(s) + 1;
45    return gs;
46}
47
48/* Free storage for growable string */
49void str_free(struct gstr *gs)
50{
51    if (gs->s)
52        free(gs->s);
53    gs->s = NULL;
54    gs->len = 0;
55}
56
57/* Append to growable string */
58void str_append(struct gstr *gs, const char *s)
59{
60    size_t l = strlen(gs->s) + strlen(s) + 1;
61    if (l > gs->len) {
62        gs->s = realloc(gs->s, l);
63        gs->len = l;
64    }
65    strcat(gs->s, s);
66}
67
68/* Append printf formatted string to growable string */
69void str_printf(struct gstr *gs, const char *fmt, ...)
70{
71    va_list ap;
72    char s[10000]; /* big enough... */
73    va_start(ap, fmt);
74    vsnprintf(s, sizeof(s), fmt, ap);
75    str_append(gs, s);
76    va_end(ap);
77}
78
79/* Retrieve value of growable string */
80const char *str_get(struct gstr *gs)
81{
82    return gs->s;
83}
84
85

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