finally move buildroot-ng to trunk
[openwrt/staging/dedeckeh.git] / 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 */
12 struct 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 */
30 int 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/linux/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 */
55 struct 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 */
65 struct 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 */
74 void 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 */
83 void 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 */
94 void 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 */
105 const char *str_get(struct gstr *gs)
106 {
107 return gs->s;
108 }
109