grapheme_substr_ascii  417 ext/intl/grapheme/grapheme_string.c 		grapheme_substr_ascii(str, str_len, start, (int32_t)length, &sub_str, &asub_str_len);
grapheme_substr_ascii   27 ext/intl/grapheme/grapheme_util.h void grapheme_substr_ascii(char *str, size_t str_len, int32_t f, int32_t l, char **sub_str, int32_t *sub_str_len);