fc_cmdline.c

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/***********************************************************************
 Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
***********************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
#include "fc_prehdrs.h"
 
#include <string.h>
 
/* utility */
#include "fciconv.h"
#include "fcintl.h"
#include "mem.h"
#include "support.h"
 
#include "fc_cmdline.h"
 
/* Get 'struct cmdline_value_list' and related functions: */
#define SPECLIST_TAG cmdline_value
#define SPECLIST_TYPE char
#include "speclist.h"
 
#define cmdline_value_list_iterate(vallist, pvalue) \
    TYPED_LIST_ITERATE(char *, vallist, pvalue)
#define cmdline_value_list_iterate_end LIST_ITERATE_END
 
static struct cmdline_value_list *cmdline_values = nullptr;
 
/**********************************************************************/
char *get_option_malloc(const char *option_name,
                        char **argv, int *i, int argc,
                        bool gc)
{
  int len = strlen(option_name);
 
  if (gc && cmdline_values == nullptr) {
    cmdline_values = cmdline_value_list_new();
  }
 
  if (!strcmp(option_name, argv[*i])
      || (!fc_strncmp(option_name, argv[*i], len) && argv[*i][len] == '=')
      || !fc_strncmp(option_name + 1, argv[*i], 2)) {
    char *opt = argv[*i] + (argv[*i][1] != '-' ? 0 : len);
    char *ret;
 
    if (*opt == '=') {
      opt++;
    } else {
      if (*i < argc - 1) {
        (*i)++;
        opt = argv[*i];
        if (strlen(opt) == 0) {
          fc_fprintf(stderr, _("Empty argument for \"%s\".\n"), option_name);
          exit(EXIT_FAILURE);
        }
      } else {
        fc_fprintf(stderr, _("Missing argument for \"%s\".\n"), option_name);
        exit(EXIT_FAILURE);
     }
   }
 
    ret = local_to_internal_string_malloc(opt);
 
    if (gc) {
      cmdline_value_list_append(cmdline_values, ret);
    }
 
    return ret;
 }
 
  return nullptr;
}
 
/**********************************************************************/
void cmdline_option_values_free(void)
{
  if (cmdline_values != nullptr) {
    cmdline_value_list_iterate(cmdline_values, pval) {
      free(pval);
    } cmdline_value_list_iterate_end;
 
    cmdline_value_list_destroy(cmdline_values);
  }
}
 
/**********************************************************************/
bool is_option(const char *option_name, char *option)
{
  return (!strcmp(option_name, option)
          || !fc_strncmp(option_name + 1, option, 2));
}
 
/**********************************************************************/
static size_t fc_strcspn(const char *s, const char *reject)
{
  bool in_single_quotes = FALSE, in_double_quotes = FALSE;
  size_t i, len = strlen(s);
 
  for (i = 0; i < len; i++) {
    if (s[i] == '"' && !in_single_quotes) {
      in_double_quotes = !in_double_quotes;
    } else if (s[i] == '\'' && !in_double_quotes) {
      in_single_quotes = !in_single_quotes;
    }
 
    if (in_single_quotes || in_double_quotes) {
      continue;
    }
 
    if (strchr(reject, s[i])) {
      break;
    }
  }
 
  return i;
}
 
/**********************************************************************/
int get_tokens(const char *str, char **tokens, size_t num_tokens,
               const char *delimiterset)
{
  unsigned int token;
 
  fc_assert_ret_val(str != nullptr, -1);
 
  for (token = 0; token < num_tokens && *str != '\0'; token++) {
    size_t len, padlength = 0;
 
    /* Skip leading delimiters */
    str += strspn(str, delimiterset);
 
    len = fc_strcspn(str, delimiterset);
 
    /* Strip start/end quotes if they exist */
    if (len >= 2) {
      if ((str[0] == '"' && str[len - 1] == '"')
          || (str[0] == '\'' && str[len - 1] == '\'')) {
        len -= 2;
        padlength = 1; /* To set the string past the end quote */
        str++;
     }
   }
 
   tokens[token] = fc_malloc(len + 1);
   (void) fc_strlcpy(tokens[token], str, len + 1); /* Adds the '\0' */
 
   str += len + padlength;
  }
 
  return token;
}
 
/**********************************************************************/
void free_tokens(char **tokens, size_t ntokens)
{
  size_t i;
 
  for (i = 0; i < ntokens; i++) {
    if (tokens[i]) {
      free(tokens[i]);
    }
  }
}