LXR busybox/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 */
  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, "\n.config include/autoconf.h: $(deps_config)\n\n$(deps_config):\n");
  48        fclose(out);
  49        rename("..config.tmp", name);
  50        return 0;
  51}
  52
  53
  54/* Allocate initial growable sting */
  55struct gstr str_new(void)
  56{
  57        struct gstr gs;
  58        gs.s = malloc(sizeof(char) * 64);
  59        gs.len = 16;
  60        strcpy(gs.s, "\0");
  61        return gs;
  62}
  63
  64/* Allocate and assign growable string */
  65struct gstr str_assign(const char *s)
  66{
  67        struct gstr gs;
  68        gs.s = strdup(s);
  69        gs.len = strlen(s) + 1;
  70        return gs;
  71}
  72
  73/* Free storage for growable string */
  74void str_free(struct gstr *gs)
  75{
  76        if (gs->s)
  77                free(gs->s);
  78        gs->s = NULL;
  79        gs->len = 0;
  80}
  81
  82/* Append to growable string */
  83void str_append(struct gstr *gs, const char *s)
  84{
  85        size_t l = strlen(gs->s) + strlen(s) + 1;
  86        if (l > gs->len) {
  87                gs->s   = realloc(gs->s, l);
  88                gs->len = l;
  89        }
  90        strcat(gs->s, s);
  91}
  92
  93/* Append printf formatted string to growable string */
  94void str_printf(struct gstr *gs, const char *fmt, ...)
  95{
  96        va_list ap;
  97        char s[10000]; /* big enough... */
  98        va_start(ap, fmt);
  99        vsnprintf(s, sizeof(s), fmt, ap);
 100        str_append(gs, s);
 101        va_end(ap);
 102}
 103
 104/* Retrieve value of growable string */
 105const char *str_get(struct gstr *gs)
 106{
 107        return gs->s;
 108}
 109
 110