procd: allow usage of * as procd_running() instance parameter
[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 <stdarg.h>
9 #include <stdlib.h>
10 #include <string.h>
11 #include "lkc.h"
12
13 /* file already present in list? If not add it */
14 struct file *file_lookup(const char *name)
15 {
16 struct file *file;
17 const char *file_name = sym_expand_string_value(name);
18
19 for (file = file_list; file; file = file->next) {
20 if (!strcmp(name, file->name)) {
21 free((void *)file_name);
22 return file;
23 }
24 }
25
26 file = xmalloc(sizeof(*file));
27 memset(file, 0, sizeof(*file));
28 file->name = file_name;
29 file->next = file_list;
30 file_list = file;
31 return file;
32 }
33
34 /* write a dependency file as used by kbuild to track dependencies */
35 int file_write_dep(const char *name)
36 {
37 struct symbol *sym, *env_sym;
38 struct expr *e;
39 struct file *file;
40 FILE *out;
41
42 if (!name)
43 name = ".kconfig.d";
44 out = fopen("..config.tmp", "w");
45 if (!out)
46 return 1;
47 fprintf(out, "deps_config := \\\n");
48 for (file = file_list; file; file = file->next) {
49 if (file->next)
50 fprintf(out, "\t%s \\\n", file->name);
51 else
52 fprintf(out, "\t%s\n", file->name);
53 }
54 fprintf(out, "\n%s: \\\n"
55 "\t$(deps_config)\n\n", conf_get_autoconfig_name());
56
57 expr_list_for_each_sym(sym_env_list, e, sym) {
58 struct property *prop;
59 const char *value;
60
61 prop = sym_get_env_prop(sym);
62 env_sym = prop_get_symbol(prop);
63 if (!env_sym)
64 continue;
65 value = getenv(env_sym->name);
66 if (!value)
67 value = "";
68 fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
69 fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
70 fprintf(out, "endif\n");
71 }
72
73 fprintf(out, "\n$(deps_config): ;\n");
74 fclose(out);
75 rename("..config.tmp", name);
76 return 0;
77 }
78
79
80 /* Allocate initial growable string */
81 struct gstr str_new(void)
82 {
83 struct gstr gs;
84 gs.s = xmalloc(sizeof(char) * 64);
85 gs.len = 64;
86 gs.max_width = 0;
87 strcpy(gs.s, "\0");
88 return gs;
89 }
90
91 /* Free storage for growable string */
92 void str_free(struct gstr *gs)
93 {
94 if (gs->s)
95 free(gs->s);
96 gs->s = NULL;
97 gs->len = 0;
98 }
99
100 /* Append to growable string */
101 void str_append(struct gstr *gs, const char *s)
102 {
103 size_t l;
104 if (s) {
105 l = strlen(gs->s) + strlen(s) + 1;
106 if (l > gs->len) {
107 gs->s = realloc(gs->s, l);
108 gs->len = l;
109 }
110 strcat(gs->s, s);
111 }
112 }
113
114 /* Append printf formatted string to growable string */
115 void str_printf(struct gstr *gs, const char *fmt, ...)
116 {
117 va_list ap;
118 char s[10000]; /* big enough... */
119 va_start(ap, fmt);
120 vsnprintf(s, sizeof(s), fmt, ap);
121 str_append(gs, s);
122 va_end(ap);
123 }
124
125 /* Retrieve value of growable string */
126 const char *str_get(struct gstr *gs)
127 {
128 return gs->s;
129 }
130
131 void *xmalloc(size_t size)
132 {
133 void *p = malloc(size);
134 if (p)
135 return p;
136 fprintf(stderr, "Out of memory.\n");
137 exit(1);
138 }
139
140 void *xcalloc(size_t nmemb, size_t size)
141 {
142 void *p = calloc(nmemb, size);
143 if (p)
144 return p;
145 fprintf(stderr, "Out of memory.\n");
146 exit(1);
147 }