support/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         char *str;
  38         char buf[PATH_MAX+1], buf2[PATH_MAX+1], dir[PATH_MAX+1];
  39         struct symbol *sym, *env_sym;
  40         struct expr *e;
  41         struct file *file;
  42         FILE *out;
  43
  44         if (!name)
  45                 name = ".kconfig.d";
  46
  47         strcpy(dir, conf_get_configname());
  48         str = strrchr(dir, '/');
  49         if (str)
  50                 str[1] = 0;
  51         else
  52                 dir[0] = 0;
  53
  54         sprintf(buf, "%s..config.tmp", dir);
  55         out = fopen(buf, "w");
  56         if (!out)
  57                 return 1;
  58         fprintf(out, "deps_config := \\\n");
  59         for (file = file_list; file; file = file->next) {
  60                 if (file->next)
  61                         fprintf(out, "\t%s \\\n", file->name);
  62                 else
  63                         fprintf(out, "\t%s\n", file->name);
  64         }
  65         fprintf(out, "\n%s: \\\n"
  66                      "\t$(deps_config)\n\n", conf_get_autoconfig_name());
  67
  68         expr_list_for_each_sym(sym_env_list, e, sym) {
  69                 struct property *prop;
  70                 const char *value;
  71
  72                 prop = sym_get_env_prop(sym);
  73                 env_sym = prop_get_symbol(prop);
  74                 if (!env_sym)
  75                         continue;
  76                 value = getenv(env_sym->name);
  77                 if (!value)
  78                         value = "";
  79                 fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
  80                 fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
  81                 fprintf(out, "endif\n");
  82         }
  83
  84         fprintf(out, "\n$(deps_config): ;\n");
  85         fclose(out);
  86         sprintf(buf2, "%s%s", dir, name);
  87         rename(buf, buf2);
  88         return 0;
  89 }
  90
  91
  92 /* Allocate initial growable string */
  93 struct gstr str_new(void)
  94 {
  95         struct gstr gs;
  96         gs.s = xmalloc(sizeof(char) * 64);
  97         gs.len = 64;
  98         gs.max_width = 0;
  99         strcpy(gs.s, "\0");
 100         return gs;
 101 }
 102
 103 /* Allocate and assign growable string */
 104 struct gstr str_assign(const char *s)
 105 {
 106         struct gstr gs;
 107         gs.s = strdup(s);
 108         gs.len = strlen(s) + 1;
 109         gs.max_width = 0;
 110         return gs;
 111 }
 112
 113 /* Free storage for growable string */
 114 void str_free(struct gstr *gs)
 115 {
 116         if (gs->s)
 117                 free(gs->s);
 118         gs->s = NULL;
 119         gs->len = 0;
 120 }
 121
 122 /* Append to growable string */
 123 void str_append(struct gstr *gs, const char *s)
 124 {
 125         size_t l;
 126         if (s) {
 127                 l = strlen(gs->s) + strlen(s) + 1;
 128                 if (l > gs->len) {
 129                         gs->s   = realloc(gs->s, l);
 130                         gs->len = l;
 131                 }
 132                 strcat(gs->s, s);
 133         }
 134 }
 135
 136 /* Append printf formatted string to growable string */
 137 void str_printf(struct gstr *gs, const char *fmt, ...)
 138 {
 139         va_list ap;
 140         char s[10000]; /* big enough... */
 141         va_start(ap, fmt);
 142         vsnprintf(s, sizeof(s), fmt, ap);
 143         str_append(gs, s);
 144         va_end(ap);
 145 }
 146
 147 /* Retrieve value of growable string */
 148 const char *str_get(struct gstr *gs)
 149 {
 150         return gs->s;
 151 }
 152
 153 void *xmalloc(size_t size)
 154 {
 155         void *p = malloc(size);
 156         if (p)
 157                 return p;
 158         fprintf(stderr, "Out of memory.\n");
 159         exit(1);
 160 }
 161
 162 void *xcalloc(size_t nmemb, size_t size)
 163 {
 164         void *p = calloc(nmemb, size);
 165         if (p)
 166                 return p;
 167         fprintf(stderr, "Out of memory.\n");
 168         exit(1);
 169 }
 170
 171