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util.c

/*
 * Copyright (C) 2002-2005 Roman Zippel <zippel@linux-m68k.org>
 * Copyright (C) 2002-2005 Sam Ravnborg <sam@ravnborg.org>
 *
 * Released under the terms of the GNU GPL v2.0.
 */

#include <string.h>
#include "lkc.h"

/* file already present in list? If not add it */
struct file *file_lookup(const char *name)
{
      struct file *file;

      for (file = file_list; file; file = file->next) {
            if (!strcmp(name, file->name))
                  return file;
      }

      file = malloc(sizeof(*file));
      memset(file, 0, sizeof(*file));
      file->name = strdup(name);
      file->next = file_list;
      file_list = file;
      return file;
}

/* write a dependency file as used by kbuild to track dependencies */
int file_write_dep(const char *name)
{
      struct symbol *sym, *env_sym;
      struct expr *e;
      struct file *file;
      FILE *out;

      if (!name)
            name = ".kconfig.d";
      out = fopen("..config.tmp", "w");
      if (!out)
            return 1;
      fprintf(out, "deps_config := \\\n");
      for (file = file_list; file; file = file->next) {
            if (file->next)
                  fprintf(out, "\t%s \\\n", file->name);
            else
                  fprintf(out, "\t%s\n", file->name);
      }
      fprintf(out, "\n%s: \\\n"
                 "\t$(deps_config)\n\n", conf_get_autoconfig_name());

      expr_list_for_each_sym(sym_env_list, e, sym) {
            struct property *prop;
            const char *value;

            prop = sym_get_env_prop(sym);
            env_sym = prop_get_symbol(prop);
            if (!env_sym)
                  continue;
            value = getenv(env_sym->name);
            if (!value)
                  value = "";
            fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
            fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
            fprintf(out, "endif\n");
      }

      fprintf(out, "\n$(deps_config): ;\n");
      fclose(out);
      rename("..config.tmp", name);
      return 0;
}


/* Allocate initial growable sting */
struct gstr str_new(void)
{
      struct gstr gs;
      gs.s = malloc(sizeof(char) * 64);
      gs.len = 64;
      strcpy(gs.s, "\0");
      return gs;
}

/* Allocate and assign growable string */
struct gstr str_assign(const char *s)
{
      struct gstr gs;
      gs.s = strdup(s);
      gs.len = strlen(s) + 1;
      return gs;
}

/* Free storage for growable string */
void str_free(struct gstr *gs)
{
      if (gs->s)
            free(gs->s);
      gs->s = NULL;
      gs->len = 0;
}

/* Append to growable string */
void str_append(struct gstr *gs, const char *s)
{
      size_t l;
      if (s) {
            l = strlen(gs->s) + strlen(s) + 1;
            if (l > gs->len) {
                  gs->s   = realloc(gs->s, l);
                  gs->len = l;
            }
            strcat(gs->s, s);
      }
}

/* Append printf formatted string to growable string */
void str_printf(struct gstr *gs, const char *fmt, ...)
{
      va_list ap;
      char s[10000]; /* big enough... */
      va_start(ap, fmt);
      vsnprintf(s, sizeof(s), fmt, ap);
      str_append(gs, s);
      va_end(ap);
}

/* Retrieve value of growable string */
const char *str_get(struct gstr *gs)
{
      return gs->s;
}


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