xref: /openbmc/linux/scripts/kconfig/util.c (revision 4800cd83)
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 	const char *file_name = sym_expand_string_value(name);
16 
17 	for (file = file_list; file; file = file->next) {
18 		if (!strcmp(name, file->name)) {
19 			free((void *)file_name);
20 			return file;
21 		}
22 	}
23 
24 	file = malloc(sizeof(*file));
25 	memset(file, 0, sizeof(*file));
26 	file->name = file_name;
27 	file->next = file_list;
28 	file_list = file;
29 	return file;
30 }
31 
32 /* write a dependency file as used by kbuild to track dependencies */
33 int file_write_dep(const char *name)
34 {
35 	struct symbol *sym, *env_sym;
36 	struct expr *e;
37 	struct file *file;
38 	FILE *out;
39 
40 	if (!name)
41 		name = ".kconfig.d";
42 	out = fopen("..config.tmp", "w");
43 	if (!out)
44 		return 1;
45 	fprintf(out, "deps_config := \\\n");
46 	for (file = file_list; file; file = file->next) {
47 		if (file->next)
48 			fprintf(out, "\t%s \\\n", file->name);
49 		else
50 			fprintf(out, "\t%s\n", file->name);
51 	}
52 	fprintf(out, "\n%s: \\\n"
53 		     "\t$(deps_config)\n\n", conf_get_autoconfig_name());
54 
55 	expr_list_for_each_sym(sym_env_list, e, sym) {
56 		struct property *prop;
57 		const char *value;
58 
59 		prop = sym_get_env_prop(sym);
60 		env_sym = prop_get_symbol(prop);
61 		if (!env_sym)
62 			continue;
63 		value = getenv(env_sym->name);
64 		if (!value)
65 			value = "";
66 		fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
67 		fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
68 		fprintf(out, "endif\n");
69 	}
70 
71 	fprintf(out, "\n$(deps_config): ;\n");
72 	fclose(out);
73 	rename("..config.tmp", name);
74 	return 0;
75 }
76 
77 
78 /* Allocate initial growable string */
79 struct gstr str_new(void)
80 {
81 	struct gstr gs;
82 	gs.s = malloc(sizeof(char) * 64);
83 	gs.len = 64;
84 	gs.max_width = 0;
85 	strcpy(gs.s, "\0");
86 	return gs;
87 }
88 
89 /* Allocate and assign growable string */
90 struct gstr str_assign(const char *s)
91 {
92 	struct gstr gs;
93 	gs.s = strdup(s);
94 	gs.len = strlen(s) + 1;
95 	gs.max_width = 0;
96 	return gs;
97 }
98 
99 /* Free storage for growable string */
100 void str_free(struct gstr *gs)
101 {
102 	if (gs->s)
103 		free(gs->s);
104 	gs->s = NULL;
105 	gs->len = 0;
106 }
107 
108 /* Append to growable string */
109 void str_append(struct gstr *gs, const char *s)
110 {
111 	size_t l;
112 	if (s) {
113 		l = strlen(gs->s) + strlen(s) + 1;
114 		if (l > gs->len) {
115 			gs->s   = realloc(gs->s, l);
116 			gs->len = l;
117 		}
118 		strcat(gs->s, s);
119 	}
120 }
121 
122 /* Append printf formatted string to growable string */
123 void str_printf(struct gstr *gs, const char *fmt, ...)
124 {
125 	va_list ap;
126 	char s[10000]; /* big enough... */
127 	va_start(ap, fmt);
128 	vsnprintf(s, sizeof(s), fmt, ap);
129 	str_append(gs, s);
130 	va_end(ap);
131 }
132 
133 /* Retrieve value of growable string */
134 const char *str_get(struct gstr *gs)
135 {
136 	return gs->s;
137 }
138 
139