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,
  48                "\n"
  49                ".config include/autoconf.h: $(deps_config)\n"
  50                "\n"
  51                "include/autoconf.h: .config\n" /* bbox */
  52                "\n"
  53                "$(deps_config):\n");
  54        fclose(out);
  55        rename("..config.tmp", name);
  56        return 0;
  57}
  58
  59
  60/* Allocate initial growable string */
  61struct gstr str_new(void)
  62{
  63        struct gstr gs;
  64        gs.s = malloc(sizeof(char) * 64);
  65        gs.len = 16;
  66        strcpy(gs.s, "\0");
  67        return gs;
  68}
  69
  70/* Allocate and assign growable string */
  71struct gstr str_assign(const char *s)
  72{
  73        struct gstr gs;
  74        gs.s = strdup(s);
  75        gs.len = strlen(s) + 1;
  76        return gs;
  77}
  78
  79/* Free storage for growable string */
  80void str_free(struct gstr *gs)
  81{
  82        if (gs->s)
  83                free(gs->s);
  84        gs->s = NULL;
  85        gs->len = 0;
  86}
  87
  88/* Append to growable string */
  89void str_append(struct gstr *gs, const char *s)
  90{
  91        size_t l = strlen(gs->s) + strlen(s) + 1;
  92        if (l > gs->len) {
  93                gs->s   = realloc(gs->s, l);
  94                gs->len = l;
  95        }
  96        strcat(gs->s, s);
  97}
  98
  99/* Append printf formatted string to growable string */
 100void str_printf(struct gstr *gs, const char *fmt, ...)
 101{
 102        va_list ap;
 103        char s[10000]; /* big enough... */
 104        va_start(ap, fmt);
 105        vsnprintf(s, sizeof(s), fmt, ap);
 106        str_append(gs, s);
 107        va_end(ap);
 108}
 109
 110/* Retrieve value of growable string */
 111const char *str_get(struct gstr *gs)
 112{
 113        return gs->s;
 114}
 115