#include "locale_impl.h"
#include <regex.h>
#include <stdio.h>
#include <string.h>

/* Error message strings for error codes listed in `regex.h'.  This list
   needs to be in sync with the codes listed there, naturally. */

/* Converted to single string by Rich Felker to remove the need for
 * data relocations at runtime, 27 Feb 2006. */

static const char messages[] = {"No error\0"
                                "No match\0"
                                "Invalid regexp\0"
                                "Unknown collating element\0"
                                "Unknown character class name\0"
                                "Trailing backslash\0"
                                "Invalid back reference\0"
                                "Missing ']'\0"
                                "Missing ')'\0"
                                "Missing '}'\0"
                                "Invalid contents of {}\0"
                                "Invalid character range\0"
                                "Out of memory\0"
                                "Repetition not preceded by valid expression\0"
                                "\0Unknown error"};

size_t regerror(int e, const regex_t* restrict preg, char* restrict buf, size_t size) {
    const char* s;
    for (s = messages; e && *s; e--, s += strlen(s) + 1)
        ;
    if (!*s)
        s++;
    s = LCTRANS_CUR(s);
    return 1 + snprintf(buf, size, "%s", s);
}