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 <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
  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 */
  30int 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 string */
  76struct gstr str_new(void)
  77{
  78        struct gstr gs;
  79        gs.s = malloc(sizeof(char) * 64);
  80        gs.len = 64;
  81        gs.max_width = 0;
  82        strcpy(gs.s, "\0");
  83        return gs;
  84}
  85
  86/* Allocate and assign growable string */
  87struct gstr str_assign(const char *s)
  88{
  89        struct gstr gs;
  90        gs.s = strdup(s);
  91        gs.len = strlen(s) + 1;
  92        gs.max_width = 0;
  93        return gs;
  94}
  95
  96/* Free storage for growable string */
  97void str_free(struct gstr *gs)
  98{
  99        if (gs->s)
 100                free(gs->s);
 101        gs->s = NULL;
 102        gs->len = 0;
 103}
 104
 105/* Append to growable string */
 106void str_append(struct gstr *gs, const char *s)
 107{
 108        size_t l;
 109        if (s) {
 110                l = strlen(gs->s) + strlen(s) + 1;
 111                if (l > gs->len) {
 112                        gs->s   = realloc(gs->s, l);
 113                        gs->len = l;
 114                }
 115                strcat(gs->s, s);
 116        }
 117}
 118
 119/* Append printf formatted string to growable string */
 120void str_printf(struct gstr *gs, const char *fmt, ...)
 121{
 122        va_list ap;
 123        char s[10000]; /* big enough... */
 124        va_start(ap, fmt);
 125        vsnprintf(s, sizeof(s), fmt, ap);
 126        str_append(gs, s);
 127        va_end(ap);
 128}
 129
 130/* Retrieve value of growable string */
 131const char *str_get(struct gstr *gs)
 132{
 133        return gs->s;
 134}
 135
 136