/src/libzip/lib/zip_error_strerror.c

Source
/*
  zip_error_sterror.c -- get string representation of struct zip_error
  Copyright (C) 1999-2023 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);
        if (system_error_buffer == NULL) {
            return _zip_err_str[ZIP_ER_MEMORY].description;
        }
        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);
                if (system_error_buffer == NULL) {
                    return _zip_err_str[ZIP_ER_MEMORY].description;
                }
                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);
                    if (system_error_buffer == NULL) {
                        return _zip_err_str[ZIP_ER_MEMORY].description;
                    }
                    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);
                    if (system_error_buffer == NULL) {
                        return _zip_err_str[ZIP_ER_MEMORY].description;
                    }
                    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;
    }
}

Line	Count	Source
1		/*
2		zip_error_sterror.c -- get string representation of struct zip_error
3		Copyright (C) 1999-2023 Dieter Baron and Thomas Klausner
4
5		This file is part of libzip, a library to manipulate ZIP archives.
6		The authors can be contacted at <info@libzip.org>
7
8		Redistribution and use in source and binary forms, with or without
9		modification, are permitted provided that the following conditions
10		are met:
11		1. Redistributions of source code must retain the above copyright
12		notice, this list of conditions and the following disclaimer.
13		2. Redistributions in binary form must reproduce the above copyright
14		notice, this list of conditions and the following disclaimer in
15		the documentation and/or other materials provided with the
16		distribution.
17		3. The names of the authors may not be used to endorse or promote
18		products derived from this software without specific prior
19		written permission.
20
21		THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
22		OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23		WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24		ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
25		DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26		DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27		GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28		INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29		IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30		OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31		IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32		*/
33
34
35		#include <stdio.h>
36		#include <stdlib.h>
37		#include <string.h>
38		#include <zlib.h>
39
40		#include "zipint.h"
41
42		ZIP_EXTERN const char *
43	53.2k	zip_error_strerror(zip_error_t *err) {
44	53.2k	const char zip_error_string, system_error_string;
45	53.2k	char *s;
46	53.2k	char *system_error_buffer = NULL;
47
48	53.2k	zip_error_fini(err);
49
50	53.2k	if (err->zip_err < 0 \|\| err->zip_err >= _zip_err_str_count) {
51	0	system_error_buffer = (char *)malloc(128);
52	0	if (system_error_buffer == NULL) {
53	0	return _zip_err_str[ZIP_ER_MEMORY].description;
54	0	}
55	0	snprintf_s(system_error_buffer, 128, "Unknown error %d", err->zip_err);
56	0	system_error_buffer[128 - 1] = '\0'; /* make sure string is NUL-terminated */
57	0	zip_error_string = NULL;
58	0	system_error_string = system_error_buffer;
59	0	}
60	53.2k	else {
61	53.2k	zip_error_string = _zip_err_str[err->zip_err].description;
62
63	53.2k	switch (_zip_err_str[err->zip_err].type) {
64	236	case ZIP_ET_SYS: {
65	236	size_t len = strerrorlen_s(err->sys_err) + 1;
66	236	system_error_buffer = malloc(len);
67	236	if (system_error_buffer == NULL) {
68	0	return _zip_err_str[ZIP_ER_MEMORY].description;
69	0	}
70	236	strerror_s(system_error_buffer, len, err->sys_err);
71	236	system_error_string = system_error_buffer;
72	236	break;
73	236	}
74
75	0	case ZIP_ET_ZLIB:
76	0	system_error_string = zError(err->sys_err);
77	0	break;
78
79	3.27k	case ZIP_ET_LIBZIP: {
80	3.27k	zip_uint8_t error = GET_ERROR_FROM_DETAIL(err->sys_err);
81	3.27k	int index = GET_INDEX_FROM_DETAIL(err->sys_err);
82
83	3.27k	if (error == 0) {
84	0	system_error_string = NULL;
85	0	}
86	3.27k	else if (error >= _zip_err_details_count) {
87	0	system_error_buffer = (char *)malloc(128);
88	0	if (system_error_buffer == NULL) {
89	0	return _zip_err_str[ZIP_ER_MEMORY].description;
90	0	}
91	0	snprintf_s(system_error_buffer, 128, "invalid detail error %u", error);
92	0	system_error_buffer[128 - 1] = '\0'; /* make sure string is NUL-terminated */
93	0	system_error_string = system_error_buffer;
94	0	}
95	3.27k	else if (_zip_err_details[error].type == ZIP_DETAIL_ET_ENTRY && index < MAX_DETAIL_INDEX) {
96	1.27k	system_error_buffer = (char *)malloc(128);
97	1.27k	if (system_error_buffer == NULL) {
98	0	return _zip_err_str[ZIP_ER_MEMORY].description;
99	0	}
100	1.27k	snprintf_s(system_error_buffer, 128, "entry %d: %s", index, _zip_err_details[error].description);
101	1.27k	system_error_buffer[128 - 1] = '\0'; /* make sure string is NUL-terminated */
102	1.27k	system_error_string = system_error_buffer;
103	1.27k	}
104	2.00k	else {
105	2.00k	system_error_string = _zip_err_details[error].description;
106	2.00k	}
107	3.27k	break;
108	3.27k	}
109
110	49.7k	default:
111	49.7k	system_error_string = NULL;
112	53.2k	}
113	53.2k	}
114
115	53.2k	if (system_error_string == NULL) {
116	49.7k	free(system_error_buffer);
117	49.7k	return zip_error_string;
118	49.7k	}
119	3.51k	else {
120	3.51k	size_t length = strlen(system_error_string);
121	3.51k	if (zip_error_string) {
122	3.51k	size_t length_error = strlen(zip_error_string);
123	3.51k	if (length + length_error + 2 < length) {
124	0	free(system_error_buffer);
125	0	return _zip_err_str[ZIP_ER_MEMORY].description;
126	0	}
127	3.51k	length += length_error + 2;
128	3.51k	}
129	3.51k	if (length == SIZE_MAX \|\| (s = (char *)malloc(length + 1)) == NULL) {
130	0	free(system_error_buffer);
131	0	return _zip_err_str[ZIP_ER_MEMORY].description;
132	0	}
133
134	3.51k	snprintf_s(s, length + 1, "%s%s%s", (zip_error_string ? zip_error_string : ""), (zip_error_string ? ": " : ""), system_error_string);
135	3.51k	err->str = s;
136
137	3.51k	free(system_error_buffer);
138	3.51k	return s;
139	3.51k	}
140	53.2k	}

Coverage Report

Created: 2025-10-13 06:06