extra/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         char tmpf[PATH_MAX+1];
  41         FILE *out;
  42
  43         if (!name)
  44                 name = ".kconfig.d";
  45         strcpy(tmpf, name);
  46         dir_name(tmpf);
  47         strcat(tmpf, "..config.tmp");
  48         out = fopen(tmpf, "w");
  49         if (!out)
  50                 return 1;
  51         fprintf(out, "deps_config := \\\n");
  52         for (file = file_list; file; file = file->next) {
  53                 if (file->next)
  54                         fprintf(out, "\t%s \\\n", file->name);
  55                 else
  56                         fprintf(out, "\t%s\n", file->name);
  57         }
  58         fprintf(out, "\n%s: \\\n"
  59                      "\t$(deps_config)\n\n", conf_get_autoconfig_name());
  60
  61         expr_list_for_each_sym(sym_env_list, e, sym) {
  62                 struct property *prop;
  63                 const char *value;
  64
  65                 prop = sym_get_env_prop(sym);
  66                 env_sym = prop_get_symbol(prop);
  67                 if (!env_sym)
  68                         continue;
  69                 value = getenv(env_sym->name);
  70                 if (!value)
  71                         value = "";
  72                 fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
  73                 fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
  74                 fprintf(out, "endif\n");
  75         }
  76
  77         fprintf(out, "\n$(deps_config): ;\n");
  78         fclose(out);
  79         rename(tmpf, name);
  80         return 0;
  81 }
  82
  83
  84 /* Allocate initial growable string */
  85 struct gstr str_new(void)
  86 {
  87         struct gstr gs;
  88         gs.s = xmalloc(sizeof(char) * 64);
  89         gs.len = 64;
  90         gs.max_width = 0;
  91         strcpy(gs.s, "\0");
  92         return gs;
  93 }
  94
  95 /* Allocate and assign growable string */
  96 struct gstr str_assign(const char *s)
  97 {
  98         struct gstr gs;
  99         gs.s = strdup(s);
 100         gs.len = strlen(s) + 1;
 101         gs.max_width = 0;
 102         return gs;
 103 }
 104
 105 /* Free storage for growable string */
 106 void str_free(struct gstr *gs)
 107 {
 108         if (gs->s)
 109                 free(gs->s);
 110         gs->s = NULL;
 111         gs->len = 0;
 112 }
 113
 114 /* Append to growable string */
 115 void str_append(struct gstr *gs, const char *s)
 116 {
 117         size_t l;
 118         if (s) {
 119                 l = strlen(gs->s) + strlen(s) + 1;
 120                 if (l > gs->len) {
 121                         gs->s   = realloc(gs->s, l);
 122                         gs->len = l;
 123                 }
 124                 strcat(gs->s, s);
 125         }
 126 }
 127
 128 /* Append printf formatted string to growable string */
 129 void str_printf(struct gstr *gs, const char *fmt, ...)
 130 {
 131         va_list ap;
 132         char s[10000]; /* big enough... */
 133         va_start(ap, fmt);
 134         vsnprintf(s, sizeof(s), fmt, ap);
 135         str_append(gs, s);
 136         va_end(ap);
 137 }
 138
 139 /* Retrieve value of growable string */
 140 const char *str_get(struct gstr *gs)
 141 {
 142         return gs->s;
 143 }
 144
 145 void *xmalloc(size_t size)
 146 {
 147         void *p = malloc(size);
 148         if (p)
 149                 return p;
 150         fprintf(stderr, "Out of memory.\n");
 151         exit(1);
 152 }
 153
 154 void *xcalloc(size_t nmemb, size_t size)
 155 {
 156         void *p = calloc(nmemb, size);
 157         if (p)
 158                 return p;
 159         fprintf(stderr, "Out of memory.\n");
 160         exit(1);
 161 }
 162
 163 /* basename, dirname - parse pathname components */
 164 char *dir_name(char *path)
 165 {
 166         char *slash = strrchr(path, '/');
 167         int size = 0;
 168         if (slash)
 169                 size = slash - path + 1;
 170         path[size] = 0;
 171         return path;
 172 }
 173 char *base_name(char *path)
 174 {
 175         char *slash = strrchr(path, '/');
 176         if (slash)
 177                 path += slash - path + 1;
 178         return path;
 179
 180 }
 181