source: MondoRescue/branches/2.2.5/mindi-busybox/scripts/kconfig/util.c @ 1770

Last change on this file since 1770 was 1765, checked in by Bruno Cornec, 13 years ago

Update to busybox 1.7.2

  • Property svn:eol-style set to native
File size: 2.1 KB
RevLine 
[1765]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/* write a dependency file as used by kbuild to track dependencies */
30int file_write_dep(const char *name)
31{
32    struct file *file;
33    FILE *out;
34
35    if (!name)
36        name = ".kconfig.d";
37    out = fopen("..config.tmp", "w");
38    if (!out)
39        return 1;
40    fprintf(out, "deps_config := \\\n");
41    for (file = file_list; file; file = file->next) {
42        if (file->next)
43            fprintf(out, "\t%s \\\n", file->name);
44        else
45            fprintf(out, "\t%s\n", file->name);
46    }
47    fprintf(out, "\n.config include/autoconf.h: $(deps_config)\n\n$(deps_config):\n");
48    fclose(out);
49    rename("..config.tmp", name);
50    return 0;
51}
52
53
54/* Allocate initial growable sting */
55struct gstr str_new(void)
56{
57    struct gstr gs;
58    gs.s = malloc(sizeof(char) * 64);
59    gs.len = 16;
60    strcpy(gs.s, "\0");
61    return gs;
62}
63
64/* Allocate and assign growable string */
65struct gstr str_assign(const char *s)
66{
67    struct gstr gs;
68    gs.s = strdup(s);
69    gs.len = strlen(s) + 1;
70    return gs;
71}
72
73/* Free storage for growable string */
74void str_free(struct gstr *gs)
75{
76    if (gs->s)
77        free(gs->s);
78    gs->s = NULL;
79    gs->len = 0;
80}
81
82/* Append to growable string */
83void str_append(struct gstr *gs, const char *s)
84{
85    size_t l = strlen(gs->s) + strlen(s) + 1;
86    if (l > gs->len) {
87        gs->s   = realloc(gs->s, l);
88        gs->len = l;
89    }
90    strcat(gs->s, s);
91}
92
93/* Append printf formatted string to growable string */
94void str_printf(struct gstr *gs, const char *fmt, ...)
95{
96    va_list ap;
97    char s[10000]; /* big enough... */
98    va_start(ap, fmt);
99    vsnprintf(s, sizeof(s), fmt, ap);
100    str_append(gs, s);
101    va_end(ap);
102}
103
104/* Retrieve value of growable string */
105const char *str_get(struct gstr *gs)
106{
107    return gs->s;
108}
109
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