LXR toybox/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 */
  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 file *file;
  33        FILE *out;
  34
  35        if (!name)
  36                name = ".kconfig.d";
  37        out = fopen("..config.tmp", "w");
  38        if (!out)
  39                return 1;
  40        fprintf(out, "deps_config := \\\n");
  41        for (file = file_list; file; file = file->next) {
  42                if (file->next)
  43                        fprintf(out, "\t%s \\\n", file->name);
  44                else
  45                        fprintf(out, "\t%s\n", file->name);
  46        }
  47        fprintf(out, "\ninclude/config/auto.conf: \\\n"
  48                     "\t$(deps_config)\n\n"
  49                     "$(deps_config): ;\n");
  50        fclose(out);
  51        rename("..config.tmp", name);
  52        return 0;
  53}
  54
  55
  56/* Allocate initial growable sting */
  57struct gstr str_new(void)
  58{
  59        struct gstr gs;
  60        gs.s = malloc(sizeof(char) * 64);
  61        gs.len = 16;
  62        strcpy(gs.s, "\0");
  63        return gs;
  64}
  65
  66/* Allocate and assign growable string */
  67struct gstr str_assign(const char *s)
  68{
  69        struct gstr gs;
  70        gs.s = strdup(s);
  71        gs.len = strlen(s) + 1;
  72        return gs;
  73}
  74
  75/* Free storage for growable string */
  76void str_free(struct gstr *gs)
  77{
  78        if (gs->s)
  79                free(gs->s);
  80        gs->s = NULL;
  81        gs->len = 0;
  82}
  83
  84/* Append to growable string */
  85void str_append(struct gstr *gs, const char *s)
  86{
  87        size_t l = strlen(gs->s) + strlen(s) + 1;
  88        if (l > gs->len) {
  89                gs->s   = realloc(gs->s, l);
  90                gs->len = l;
  91        }
  92        strcat(gs->s, s);
  93}
  94
  95/* Append printf formatted string to growable string */
  96void str_printf(struct gstr *gs, const char *fmt, ...)
  97{
  98        va_list ap;
  99        char s[10000]; /* big enough... */
 100        va_start(ap, fmt);
 101        vsnprintf(s, sizeof(s), fmt, ap);
 102        str_append(gs, s);
 103        va_end(ap);
 104}
 105
 106/* Retrieve value of growable string */
 107const char *str_get(struct gstr *gs)
 108{
 109        return gs->s;
 110}
 111
 112