xref: /openbmc/u-boot/scripts/kconfig/util.c (revision 3e9aa320)
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 }
148