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 <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