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