linux/scripts/kconfig/util.c
<<
>>
Prefs
   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 */
  12struct 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 */
  33int 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 */
  79struct 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 */
  90struct 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 */
 100void 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 */
 109void 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 */
 123void 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 */
 134const char *str_get(struct gstr *gs)
 135{
 136        return gs->s;
 137}
 138
 139