linux/scripts/kconfig/util.c
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   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 */
  14struct 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 = malloc(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 */
  35int file_write_dep(const char *name)
  36{
  37        struct symbol *sym, *env_sym;
  38        struct expr *e;
  39        struct file *file;
  40        FILE *out;
  41
  42        if (!name)
  43                name = ".kconfig.d";
  44        out = fopen("..config.tmp", "w");
  45        if (!out)
  46                return 1;
  47        fprintf(out, "deps_config := \\\n");
  48        for (file = file_list; file; file = file->next) {
  49                if (file->next)
  50                        fprintf(out, "\t%s \\\n", file->name);
  51                else
  52                        fprintf(out, "\t%s\n", file->name);
  53        }
  54        fprintf(out, "\n%s: \\\n"
  55                     "\t$(deps_config)\n\n", conf_get_autoconfig_name());
  56
  57        expr_list_for_each_sym(sym_env_list, e, sym) {
  58                struct property *prop;
  59                const char *value;
  60
  61                prop = sym_get_env_prop(sym);
  62                env_sym = prop_get_symbol(prop);
  63                if (!env_sym)
  64                        continue;
  65                value = getenv(env_sym->name);
  66                if (!value)
  67                        value = "";
  68                fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
  69                fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
  70                fprintf(out, "endif\n");
  71        }
  72
  73        fprintf(out, "\n$(deps_config): ;\n");
  74        fclose(out);
  75        rename("..config.tmp", name);
  76        return 0;
  77}
  78
  79
  80/* Allocate initial growable string */
  81struct gstr str_new(void)
  82{
  83        struct gstr gs;
  84        gs.s = malloc(sizeof(char) * 64);
  85        gs.len = 64;
  86        gs.max_width = 0;
  87        strcpy(gs.s, "\0");
  88        return gs;
  89}
  90
  91/* Allocate and assign growable string */
  92struct gstr str_assign(const char *s)
  93{
  94        struct gstr gs;
  95        gs.s = strdup(s);
  96        gs.len = strlen(s) + 1;
  97        gs.max_width = 0;
  98        return gs;
  99}
 100
 101/* Free storage for growable string */
 102void str_free(struct gstr *gs)
 103{
 104        if (gs->s)
 105                free(gs->s);
 106        gs->s = NULL;
 107        gs->len = 0;
 108}
 109
 110/* Append to growable string */
 111void str_append(struct gstr *gs, const char *s)
 112{
 113        size_t l;
 114        if (s) {
 115                l = strlen(gs->s) + strlen(s) + 1;
 116                if (l > gs->len) {
 117                        gs->s   = realloc(gs->s, l);
 118                        gs->len = l;
 119                }
 120                strcat(gs->s, s);
 121        }
 122}
 123
 124/* Append printf formatted string to growable string */
 125void str_printf(struct gstr *gs, const char *fmt, ...)
 126{
 127        va_list ap;
 128        char s[10000]; /* big enough... */
 129        va_start(ap, fmt);
 130        vsnprintf(s, sizeof(s), fmt, ap);
 131        str_append(gs, s);
 132        va_end(ap);
 133}
 134
 135/* Retrieve value of growable string */
 136const char *str_get(struct gstr *gs)
 137{
 138        return gs->s;
 139}
 140
 141
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