scripts/kconfig/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 /* Allocate and assign growable string */
  92 struct gstr str_assign(const char *s)
  93 {
  94         struct gstr gs;
  95         gs.s = strdup(s);
  96         gs.len = strlen(s) + 1;
  97         gs.max_width = 0;
  98         return gs;
  99 }
 100
 101 /* Free storage for growable string */
 102 void str_free(struct gstr *gs)
 103 {
 104         if (gs->s)
 105                 free(gs->s);
 106         gs->s = NULL;
 107         gs->len = 0;
 108 }
 109
 110 /* Append to growable string */
 111 void str_append(struct gstr *gs, const char *s)
 112 {
 113         size_t l;
 114         if (s) {
 115                 l = strlen(gs->s) + strlen(s) + 1;
 116                 if (l > gs->len) {
 117                         gs->s   = realloc(gs->s, l);
 118                         gs->len = l;
 119                 }
 120                 strcat(gs->s, s);
 121         }
 122 }
 123
 124 /* Append printf formatted string to growable string */
 125 void str_printf(struct gstr *gs, const char *fmt, ...)
 126 {
 127         va_list ap;
 128         char s[10000]; /* big enough... */
 129         va_start(ap, fmt);
 130         vsnprintf(s, sizeof(s), fmt, ap);
 131         str_append(gs, s);
 132         va_end(ap);
 133 }
 134
 135 /* Retrieve value of growable string */
 136 const char *str_get(struct gstr *gs)
 137 {
 138         return gs->s;
 139 }
 140
 141 void *xmalloc(size_t size)
 142 {
 143         void *p = malloc(size);
 144         if (p)
 145                 return p;
 146         fprintf(stderr, "Out of memory.\n");
 147         exit(1);
 148 }
 149
 150 void *xcalloc(size_t nmemb, size_t size)
 151 {
 152         void *p = calloc(nmemb, size);
 153         if (p)
 154                 return p;
 155         fprintf(stderr, "Out of memory.\n");
 156         exit(1);
 157 }
 158
 159