text: /* Copyright  (C) 2010-2020 The RetroArch team
   *
   * ---------------------------------------------------------------------------------------
   * The following license statement only applies to this file (stdstring.h).
   * ---------------------------------------------------------------------------------------
   *
   * Permission is hereby granted, free of charge,
   * to any person obtaining a copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
   * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
   * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #ifndef __LIBRETRO_SDK_STDSTRING_H
  #define __LIBRETRO_SDK_STDSTRING_H
  
  #include <stdlib.h>
  #include <stddef.h>
  #include <ctype.h>
  #include <string.h>
  #include <boolean.h>
  
  #include <retro_common_api.h>
  #include <retro_inline.h>
  #include <compat/strl.h>
  
  RETRO_BEGIN_DECLS
  
  #define strcpy_literal(a, b) strcpy(a, b)
  
  static INLINE bool string_is_empty(const char *data)
  {
     return !data || (*data == '\0');
  }
  
  static INLINE bool string_is_equal(const char *a, const char *b)
  {
     return (a && b) ? !strcmp(a, b) : false;
  }
  
  static INLINE bool string_starts_with_size(const char *str, const char *prefix,
        size_t size)
  {
     return (str && prefix) ? !strncmp(prefix, str, size) : false;
  }
  
  static INLINE bool string_starts_with(const char *str, const char *prefix)
  {
     return (str && prefix) ? !strncmp(prefix, str, strlen(prefix)) : false;
  }
  
  static INLINE bool string_ends_with_size(const char *str, const char *suffix,
        size_t str_len, size_t suffix_len)
  {
     return (str_len < suffix_len) ? false :
           !memcmp(suffix, str + (str_len - suffix_len), suffix_len);
  }
  
  static INLINE bool string_ends_with(const char *str, const char *suffix)
  {
     if (!str || !suffix)
        return false;
     return string_ends_with_size(str, suffix, strlen(str), strlen(suffix));
  }
  
  /* Returns the length of 'str' (c.f. strlen()), but only
   * checks the first 'size' characters
   * - If 'str' is NULL, returns 0
   * - If 'str' is not NULL and no '\0' character is found
   *   in the first 'size' characters, returns 'size' */
  static INLINE size_t strlen_size(const char *str, size_t size)
  {
     size_t i = 0;
     if (str)
        while (i < size && str[i]) i++;
     return i;
  }
  
  #define STRLEN_CONST(x)                   ((sizeof((x))-1))
  
  #define string_is_not_equal(a, b)         !string_is_equal((a), (b))
  
  #define string_is_not_equal_fast(a, b, size) (memcmp(a, b, size) != 0)
  #define string_is_equal_fast(a, b, size)     (memcmp(a, b, size) == 0)
  
  static INLINE bool string_is_equal_case_insensitive(const char *a,
        const char *b)
  {
     int result              = 0;
     const unsigned char *p1 = (const unsigned char*)a;
     const unsigned char *p2 = (const unsigned char*)b;
  
     if (!a || !b)
        return false;
     if (p1 == p2)
        return true;
  
     while ((result = tolower (*p1) - tolower (*p2++)) == 0)
        if (*p1++ == '\0')
           break;
  
     return (result == 0);
  }
  
  /* Deprecated alias, all callers should use string_is_equal_case_insensitive instead */
  #define string_is_equal_noncase string_is_equal_case_insensitive
  
  char *string_to_upper(char *s);
  
  char *string_to_lower(char *s);
  
  char *string_ucwords(char *s);
  
  char *string_replace_substring(const char *in, const char *pattern,
        const char *by);
  
  /* Remove leading whitespaces */
  char *string_trim_whitespace_left(char *const s);
  
  /* Remove trailing whitespaces */
  char *string_trim_whitespace_right(char *const s);
  
  /* Remove leading and trailing whitespaces */
  char *string_trim_whitespace(char *const s);
  
  /* max_lines == 0 means no limit */
  char *word_wrap(char *buffer, const char *string,
        int line_width, bool unicode, unsigned max_lines);
  
  /* Splits string into tokens seperated by 'delim'
   * > Returned token string must be free()'d
   * > Returns NULL if token is not found
   * > After each call, 'str' is set to the position after the
   *   last found token
   * > Tokens *include* empty strings
   * Usage example:
   *    char *str      = "1,2,3,4,5,6,7,,,10,";
   *    char **str_ptr = &str;
   *    char *token    = NULL;
   *    while ((token = string_tokenize(str_ptr, ",")))
   *    {
   *        printf("%s\n", token);
   *        free(token);
   *        token = NULL;
   *    }
   */
  char* string_tokenize(char **str, const char *delim);
  
  /* Removes every instance of character 'c' from 'str' */
  void string_remove_all_chars(char *str, char c);
  
  /* Replaces every instance of character 'find' in 'str'
   * with character 'replace' */
  void string_replace_all_chars(char *str, char find, char replace);
  
  /* Converts string to unsigned integer.
   * Returns 0 if string is invalid  */
  unsigned string_to_unsigned(const char *str);
  
  /* Converts hexadecimal string to unsigned integer.
   * Handles optional leading '0x'.
   * Returns 0 if string is invalid  */
  unsigned string_hex_to_unsigned(const char *str);
  
  char *string_init(const char *src);
  
  void string_set(char **string, const char *src);
  
  RETRO_END_DECLS
  
  #endif
  