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/*
zip_error_sterror.c -- get string representation of struct zip_error
Copyright (C) 1999-2021 Dieter Baron and Thomas Klausner
This file is part of libzip, a library to manipulate ZIP archives.
The authors can be contacted at <info@libzip.org>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. The names of the authors may not be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <zlib.h>
#include "zipint.h"
ZIP_EXTERN const char *
zip_error_strerror(zip_error_t *err) {
const char *zip_error_string, *system_error_string;
char *s;
char *system_error_buffer = NULL;
zip_error_fini(err);
if (err->zip_err < 0 || err->zip_err >= _zip_err_str_count) {
system_error_buffer = (char *)malloc(128);
snprintf_s(system_error_buffer, 128, "Unknown error %d", err->zip_err);
system_error_buffer[128 - 1] = '\0'; /* make sure string is NUL-terminated */
zip_error_string = NULL;
system_error_string = system_error_buffer;
}
else {
zip_error_string = _zip_err_str[err->zip_err].description;
switch (_zip_err_str[err->zip_err].type) {
case ZIP_ET_SYS: {
size_t len = strerrorlen_s(err->sys_err) + 1;
system_error_buffer = malloc(len);
strerror_s(system_error_buffer, len, err->sys_err);
system_error_string = system_error_buffer;
break;
}
case ZIP_ET_ZLIB:
system_error_string = zError(err->sys_err);
break;
case ZIP_ET_LIBZIP: {
zip_uint8_t error = GET_ERROR_FROM_DETAIL(err->sys_err);
int index = GET_INDEX_FROM_DETAIL(err->sys_err);
if (error == 0) {
system_error_string = NULL;
}
else if (error >= _zip_err_details_count) {
system_error_buffer = (char *)malloc(128);
snprintf_s(system_error_buffer, 128, "invalid detail error %u", error);
system_error_buffer[128 - 1] = '\0'; /* make sure string is NUL-terminated */
system_error_string = system_error_buffer;
}
else if (_zip_err_details[error].type == ZIP_DETAIL_ET_ENTRY && index < MAX_DETAIL_INDEX) {
system_error_buffer = (char *)malloc(128);
snprintf_s(system_error_buffer, 128, "entry %d: %s", index, _zip_err_details[error].description);
system_error_buffer[128 - 1] = '\0'; /* make sure string is NUL-terminated */
system_error_string = system_error_buffer;
}
else {
system_error_string = _zip_err_details[error].description;
}
break;
}
default:
system_error_string = NULL;
}
}
if (system_error_string == NULL) {
free(system_error_buffer);
return zip_error_string;
}
else {
size_t length = strlen(system_error_string);
if (zip_error_string) {
size_t length_error = strlen(zip_error_string);
if (length + length_error + 2 < length) {
free(system_error_buffer);
return _zip_err_str[ZIP_ER_MEMORY].description;
}
length += length_error + 2;
}
if (length == SIZE_MAX || (s = (char *)malloc(length + 1)) == NULL) {
free(system_error_buffer);
return _zip_err_str[ZIP_ER_MEMORY].description;
}
snprintf_s(s, length + 1, "%s%s%s", (zip_error_string ? zip_error_string : ""), (zip_error_string ? ": " : ""), system_error_string);
err->str = s;
free(system_error_buffer);
return s;
}
}
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