/src/minizip-ng/mz_os.c

Source
/* mz_os.c -- System functions
   part of the minizip-ng project

   Copyright (C) Nathan Moinvaziri
     https://github.com/zlib-ng/minizip-ng
   Copyright (C) 1998-2010 Gilles Vollant
     https://www.winimage.com/zLibDll/minizip.html

   This program is distributed under the terms of the same license as zlib.
   See the accompanying LICENSE file for the full text of the license.
*/

#include "mz.h"
#include "mz_crypt.h"
#include "mz_os.h"
#include "mz_strm.h"
#include "mz_strm_os.h"

#include <ctype.h> /* tolower */
#include <string.h>

/***************************************************************************/

int32_t mz_path_combine(char *path, const char *join, int32_t max_path) {
    int32_t path_len = 0;

    if (!path || !join || !max_path)
        return MZ_PARAM_ERROR;

    path_len = (int32_t)strlen(path);

    if (path_len == 0) {
        strncpy(path, join, max_path - 1);
        path[max_path - 1] = 0;
    } else {
        mz_path_append_slash(path, max_path, MZ_PATH_SLASH_PLATFORM);
        path_len = (int32_t)strlen(path);
        if (max_path > path_len)
            strncat(path, join, max_path - path_len - 1);
    }

    return MZ_OK;
}

int32_t mz_path_append_slash(char *path, int32_t max_path, char slash) {
    int32_t path_len = (int32_t)strlen(path);
    if ((path_len + 2) >= max_path)
        return MZ_BUF_ERROR;
    if (!mz_os_is_dir_separator(path[path_len - 1])) {
        path[path_len] = slash;
        path[path_len + 1] = 0;
    }
    return MZ_OK;
}

int32_t mz_path_remove_slash(char *path) {
    int32_t path_len = (int32_t)strlen(path);
    while (path_len > 0) {
        if (mz_os_is_dir_separator(path[path_len - 1]))
            path[path_len - 1] = 0;
        else
            break;

        path_len -= 1;
    }
    return MZ_OK;
}

int32_t mz_path_has_slash(const char *path) {
    int32_t path_len = (int32_t)strlen(path);
    if (path_len > 0 && !mz_os_is_dir_separator(path[path_len - 1]))
        return MZ_EXIST_ERROR;
    return MZ_OK;
}

int32_t mz_path_convert_slashes(char *path, char slash) {
    int32_t i = 0;

    for (i = 0; i < (int32_t)strlen(path); i += 1) {
        if (mz_os_is_dir_separator(path[i]))
            path[i] = slash;
    }
    return MZ_OK;
}

int32_t mz_path_compare_wc(const char *path, const char *wildcard, uint8_t ignore_case) {
    while (*path != 0) {
        switch (*wildcard) {
        case '*':

            if (*(wildcard + 1) == 0)
                return MZ_OK;

            while (*path != 0) {
                if (mz_path_compare_wc(path, (wildcard + 1), ignore_case) == MZ_OK)
                    return MZ_OK;

                path += 1;
            }

            return MZ_EXIST_ERROR;

        default:
            /* Ignore differences in path slashes on platforms */
            if ((*path == '\\' && *wildcard == '/') || (*path == '/' && *wildcard == '\\'))
                break;

            if (ignore_case) {
                if (tolower(*path) != tolower(*wildcard))
                    return MZ_EXIST_ERROR;
            } else {
                if (*path != *wildcard)
                    return MZ_EXIST_ERROR;
            }

            break;
        }

        path += 1;
        wildcard += 1;
    }

    if ((*wildcard != 0) && (*wildcard != '*'))
        return MZ_EXIST_ERROR;

    return MZ_OK;
}

int32_t mz_path_resolve(const char *path, char *output, int32_t max_output) {
    const char *source = path;
    const char *check = output;
    char *target = output;

    if (max_output <= 0)
        return MZ_PARAM_ERROR;

    while (*source != 0 && max_output > 1) {
        check = source;
        if (mz_os_is_dir_separator(*check))
            check += 1;

        if (source == path || target == output || check != source) {
            /* Skip double paths */
            if (mz_os_is_dir_separator(*check)) {
                source += 1;
                continue;
            }
            if (*check == '.') {
                check += 1;

                /* Remove . if at end of string and not at the beginning */
                if (*check == 0 && source != path && target != output) {
                    /* Copy last slash */
                    *target = *source;
                    target += 1;
                    max_output -= 1;
                    source += (check - source);
                    continue;
                }
                /* Remove . if not at end of string */
                else if (mz_os_is_dir_separator(*check)) {
                    source += (check - source);
                    /* Skip slash if at beginning of string */
                    if (target == output && *source != 0)
                        source += 1;
                    continue;
                }
                /* Go to parent directory .. */
                else if (*check == '.') {
                    check += 1;
                    if (*check == 0 || mz_os_is_dir_separator(*check)) {
                        source += (check - source);

                        /* Search backwards for previous slash or the start of the output string */
                        if (target != output) {
                            target -= 1;
                            do {
                                if (target == output || mz_os_is_dir_separator(*target))
                                    break;

                                target -= 1;
                                max_output += 1;
                            } while (target > output);
                        }

                        if ((target == output) && *source != 0)
                            source += 1;
                        if (mz_os_is_dir_separator(*target) && *source == 0)
                            target += 1;

                        *target = 0;
                        continue;
                    }
                }
            }
        }

        *target = *source;

        source += 1;
        target += 1;
        max_output -= 1;
    }

    *target = 0;

    if (*path == 0)
        return MZ_INTERNAL_ERROR;

    return MZ_OK;
}

int32_t mz_path_remove_filename(char *path) {
    char *path_ptr = NULL;

    if (!path)
        return MZ_PARAM_ERROR;

    path_ptr = path + strlen(path) - 1;

    while (path_ptr > path) {
        if (mz_os_is_dir_separator(*path_ptr)) {
            *path_ptr = 0;
            break;
        }

        path_ptr -= 1;
    }

    if (path_ptr == path)
        *path_ptr = 0;

    return MZ_OK;
}

int32_t mz_path_remove_extension(char *path) {
    char *path_ptr = NULL;

    if (!path)
        return MZ_PARAM_ERROR;

    path_ptr = path + strlen(path) - 1;

    while (path_ptr > path) {
        if (mz_os_is_dir_separator(*path_ptr))
            break;
        if (*path_ptr == '.') {
            *path_ptr = 0;
            break;
        }

        path_ptr -= 1;
    }

    if (path_ptr == path)
        *path_ptr = 0;

    return MZ_OK;
}

int32_t mz_path_get_filename(const char *path, const char **filename) {
    const char *match = NULL;

    if (!path || !filename)
        return MZ_PARAM_ERROR;

    *filename = NULL;

    for (match = path; *match != 0; match += 1) {
        if (mz_os_is_dir_separator(*match))
            *filename = match + 1;
    }

    if (!*filename)
        return MZ_EXIST_ERROR;

    return MZ_OK;
}

int32_t mz_dir_has_unsafe_symlink(const char *path, const char *base_path) {
    char *check_path = NULL;
    char *symlink_target = NULL;
    char *combined = NULL;
    char *resolved = NULL;
    size_t path_len = 0;
    size_t base_len = 0;
    size_t alloc_size = 0;
    size_t parent_len = 0;
    size_t pos = 0;
    int32_t err = MZ_OK;

    if (!path || *path == 0 || !base_path)
        return MZ_PARAM_ERROR;

    path_len = strlen(path);
    base_len = strlen(base_path);

    /* Remove trailing slash from base_path for comparison */
    while (base_len > 0 && mz_os_is_dir_separator(base_path[base_len - 1]))
        base_len--;

    /* Allocate buffers with max size needed: path + symlink target + separator */
    alloc_size = path_len * 2 + 2;

    check_path = (char *)calloc(1, path_len + 1);
    symlink_target = (char *)calloc(1, path_len + 1);
    combined = (char *)calloc(1, alloc_size);
    resolved = (char *)calloc(1, alloc_size);

    if (!check_path || !symlink_target || !combined || !resolved) {
        err = MZ_MEM_ERROR;
    }

    /* Walk through each path component */
    while (err == MZ_OK && pos < path_len) {
        /* Copy separator if present */
        if (mz_os_is_dir_separator(path[pos])) {
            check_path[pos] = path[pos];
            pos++;
        }

        /* Copy next path component */
        while (pos < path_len && !mz_os_is_dir_separator(path[pos])) {
            check_path[pos] = path[pos];
            pos++;
        }
        check_path[pos] = 0;

        /* Check if this existing path component is a symlink */
        if (mz_os_is_symlink(check_path) != MZ_OK)
            continue;
        if (mz_os_read_symlink(check_path, symlink_target, (int32_t)(path_len + 1)) != MZ_OK)
            continue;

        /* Absolute symlink targets are not allowed */
        if (mz_os_is_dir_separator(symlink_target[0])) {
            err = MZ_EXIST_ERROR;
            break;
        }

        /* Find parent directory length by scanning backwards past filename and trailing slashes */
        parent_len = pos;
        while (parent_len > 0 && !mz_os_is_dir_separator(check_path[parent_len - 1]))
            parent_len--;
        while (parent_len > 0 && mz_os_is_dir_separator(check_path[parent_len - 1]))
            parent_len--;

        /* Combine parent + symlink_target */
        combined[0] = 0;
        if (parent_len > 0) {
            strncpy(combined, check_path, parent_len);
            combined[parent_len] = 0;
            mz_path_append_slash(combined, (int32_t)alloc_size, MZ_PATH_SLASH_PLATFORM);
        }
        strncat(combined, symlink_target, alloc_size - strlen(combined) - 1);

        /* Resolve the combined path to eliminate .. */
        if (mz_path_resolve(combined, resolved, (int32_t)alloc_size) != MZ_OK) {
            err = MZ_EXIST_ERROR;
            break;
        }

        /* Check that resolved path starts with base_path */
        if (strlen(resolved) < base_len ||
            strncmp(resolved, base_path, base_len) != 0 ||
            (resolved[base_len] != 0 && !mz_os_is_dir_separator(resolved[base_len]))) {
            err = MZ_EXIST_ERROR;
            break;
        }
    }

    free(check_path);
    free(symlink_target);
    free(combined);
    free(resolved);

    return err;
}

int32_t mz_dir_make(const char *path) {
    int32_t err = MZ_OK;
    char *current_dir = NULL;
    char *match = NULL;
    char hold = 0;

    if (!*path)
        return MZ_OK;

    current_dir = strdup(path);
    if (!current_dir)
        return MZ_MEM_ERROR;

    mz_path_remove_slash(current_dir);

    err = mz_os_make_dir(current_dir);
    if (err != MZ_OK) {
        match = current_dir + 1;
        while (1) {
            while (*match != 0 && !mz_os_is_dir_separator(*match))
                match += 1;
            hold = *match;
            *match = 0;

            err = mz_os_make_dir(current_dir);
            if (err != MZ_OK)
                break;
            if (hold == 0)
                break;

            *match = hold;
            match += 1;
        }
    }

    free(current_dir);
    return err;
}

int32_t mz_file_get_crc(const char *path, uint32_t *result_crc) {
    void *stream = NULL;
    uint32_t crc32 = 0;
    int32_t read = 0;
    int32_t err = MZ_OK;
    uint8_t buf[16384];

    stream = mz_stream_os_create();
    if (!stream)
        return MZ_MEM_ERROR;

    err = mz_stream_os_open(stream, path, MZ_OPEN_MODE_READ);
    if (err == MZ_OK) {
        do {
            read = mz_stream_os_read(stream, buf, sizeof(buf));

            if (read < 0) {
                err = read;
                break;
            }

            crc32 = mz_crypt_crc32_update(crc32, buf, read);
        } while ((err == MZ_OK) && (read > 0));

        mz_stream_os_close(stream);
    }

    *result_crc = crc32;

    mz_stream_os_delete(&stream);

    return err;
}

/***************************************************************************/

Coverage Report

Created: 2026-01-22 07:12

Line	Count	Source
1		/* mz_os.c -- System functions
2		part of the minizip-ng project
3
4		Copyright (C) Nathan Moinvaziri
5		https://github.com/zlib-ng/minizip-ng
6		Copyright (C) 1998-2010 Gilles Vollant
7		https://www.winimage.com/zLibDll/minizip.html
8
9		This program is distributed under the terms of the same license as zlib.
10		See the accompanying LICENSE file for the full text of the license.
11		*/
12
13		#include "mz.h"
14		#include "mz_crypt.h"
15		#include "mz_os.h"
16		#include "mz_strm.h"
17		#include "mz_strm_os.h"
18
19		#include <ctype.h> /* tolower */
20		#include <string.h>
21
22		/***************************************************************************/
23
24	0	int32_t mz_path_combine(char path, const char join, int32_t max_path) {
25	0	int32_t path_len = 0;
26
27	0	if (!path \|\| !join \|\| !max_path)
28	0	return MZ_PARAM_ERROR;
29
30	0	path_len = (int32_t)strlen(path);
31
32	0	if (path_len == 0) {
33	0	strncpy(path, join, max_path - 1);
34	0	path[max_path - 1] = 0;
35	0	} else {
36	0	mz_path_append_slash(path, max_path, MZ_PATH_SLASH_PLATFORM);
37	0	path_len = (int32_t)strlen(path);
38	0	if (max_path > path_len)
39	0	strncat(path, join, max_path - path_len - 1);
40	0	}
41
42	0	return MZ_OK;
43	0	}
44
45	0	int32_t mz_path_append_slash(char *path, int32_t max_path, char slash) {
46	0	int32_t path_len = (int32_t)strlen(path);
47	0	if ((path_len + 2) >= max_path)
48	0	return MZ_BUF_ERROR;
49	0	if (!mz_os_is_dir_separator(path[path_len - 1])) {
50	0	path[path_len] = slash;
51	0	path[path_len + 1] = 0;
52	0	}
53	0	return MZ_OK;
54	0	}
55
56	0	int32_t mz_path_remove_slash(char *path) {
57	0	int32_t path_len = (int32_t)strlen(path);
58	0	while (path_len > 0) {
59	0	if (mz_os_is_dir_separator(path[path_len - 1]))
60	0	path[path_len - 1] = 0;
61	0	else
62	0	break;
63
64	0	path_len -= 1;
65	0	}
66	0	return MZ_OK;
67	0	}
68
69	0	int32_t mz_path_has_slash(const char *path) {
70	0	int32_t path_len = (int32_t)strlen(path);
71	0	if (path_len > 0 && !mz_os_is_dir_separator(path[path_len - 1]))
72	0	return MZ_EXIST_ERROR;
73	0	return MZ_OK;
74	0	}
75
76	0	int32_t mz_path_convert_slashes(char *path, char slash) {
77	0	int32_t i = 0;
78
79	0	for (i = 0; i < (int32_t)strlen(path); i += 1) {
80	0	if (mz_os_is_dir_separator(path[i]))
81	0	path[i] = slash;
82	0	}
83	0	return MZ_OK;
84	0	}
85
86	0	int32_t mz_path_compare_wc(const char path, const char wildcard, uint8_t ignore_case) {
87	0	while (*path != 0) {
88	0	switch (*wildcard) {
89	0	case '*':
90
91	0	if (*(wildcard + 1) == 0)
92	0	return MZ_OK;
93
94	0	while (*path != 0) {
95	0	if (mz_path_compare_wc(path, (wildcard + 1), ignore_case) == MZ_OK)
96	0	return MZ_OK;
97
98	0	path += 1;
99	0	}
100
101	0	return MZ_EXIST_ERROR;
102
103	0	default:
104		/* Ignore differences in path slashes on platforms */
105	0	if ((path == '\\' && wildcard == '/') \|\| (path == '/' && wildcard == '\\'))
106	0	break;
107
108	0	if (ignore_case) {
109	0	if (tolower(path) != tolower(wildcard))
110	0	return MZ_EXIST_ERROR;
111	0	} else {
112	0	if (path != wildcard)
113	0	return MZ_EXIST_ERROR;
114	0	}
115
116	0	break;
117	0	}
118
119	0	path += 1;
120	0	wildcard += 1;
121	0	}
122
123	0	if ((wildcard != 0) && (wildcard != '*'))
124	0	return MZ_EXIST_ERROR;
125
126	0	return MZ_OK;
127	0	}
128
129	0	int32_t mz_path_resolve(const char path, char output, int32_t max_output) {
130	0	const char *source = path;
131	0	const char *check = output;
132	0	char *target = output;
133
134	0	if (max_output <= 0)
135	0	return MZ_PARAM_ERROR;
136
137	0	while (*source != 0 && max_output > 1) {
138	0	check = source;
139	0	if (mz_os_is_dir_separator(*check))
140	0	check += 1;
141
142	0	if (source == path \|\| target == output \|\| check != source) {
143		/* Skip double paths */
144	0	if (mz_os_is_dir_separator(*check)) {
145	0	source += 1;
146	0	continue;
147	0	}
148	0	if (*check == '.') {
149	0	check += 1;
150
151		/* Remove . if at end of string and not at the beginning */
152	0	if (*check == 0 && source != path && target != output) {
153		/* Copy last slash */
154	0	target = source;
155	0	target += 1;
156	0	max_output -= 1;
157	0	source += (check - source);
158	0	continue;
159	0	}
160		/* Remove . if not at end of string */
161	0	else if (mz_os_is_dir_separator(*check)) {
162	0	source += (check - source);
163		/* Skip slash if at beginning of string */
164	0	if (target == output && *source != 0)
165	0	source += 1;
166	0	continue;
167	0	}
168		/* Go to parent directory .. */
169	0	else if (*check == '.') {
170	0	check += 1;
171	0	if (check == 0 \|\| mz_os_is_dir_separator(check)) {
172	0	source += (check - source);
173
174		/* Search backwards for previous slash or the start of the output string */
175	0	if (target != output) {
176	0	target -= 1;
177	0	do {
178	0	if (target == output \|\| mz_os_is_dir_separator(*target))
179	0	break;
180
181	0	target -= 1;
182	0	max_output += 1;
183	0	} while (target > output);
184	0	}
185
186	0	if ((target == output) && *source != 0)
187	0	source += 1;
188	0	if (mz_os_is_dir_separator(target) && source == 0)
189	0	target += 1;
190
191	0	*target = 0;
192	0	continue;
193	0	}
194	0	}
195	0	}
196	0	}
197
198	0	target = source;
199
200	0	source += 1;
201	0	target += 1;
202	0	max_output -= 1;
203	0	}
204
205	0	*target = 0;
206
207	0	if (*path == 0)
208	0	return MZ_INTERNAL_ERROR;
209
210	0	return MZ_OK;
211	0	}
212
213	0	int32_t mz_path_remove_filename(char *path) {
214	0	char *path_ptr = NULL;
215
216	0	if (!path)
217	0	return MZ_PARAM_ERROR;
218
219	0	path_ptr = path + strlen(path) - 1;
220
221	0	while (path_ptr > path) {
222	0	if (mz_os_is_dir_separator(*path_ptr)) {
223	0	*path_ptr = 0;
224	0	break;
225	0	}
226
227	0	path_ptr -= 1;
228	0	}
229
230	0	if (path_ptr == path)
231	0	*path_ptr = 0;
232
233	0	return MZ_OK;
234	0	}
235
236	0	int32_t mz_path_remove_extension(char *path) {
237	0	char *path_ptr = NULL;
238
239	0	if (!path)
240	0	return MZ_PARAM_ERROR;
241
242	0	path_ptr = path + strlen(path) - 1;
243
244	0	while (path_ptr > path) {
245	0	if (mz_os_is_dir_separator(*path_ptr))
246	0	break;
247	0	if (*path_ptr == '.') {
248	0	*path_ptr = 0;
249	0	break;
250	0	}
251
252	0	path_ptr -= 1;
253	0	}
254
255	0	if (path_ptr == path)
256	0	*path_ptr = 0;
257
258	0	return MZ_OK;
259	0	}
260
261	0	int32_t mz_path_get_filename(const char path, const char *filename) {
262	0	const char *match = NULL;
263
264	0	if (!path \|\| !filename)
265	0	return MZ_PARAM_ERROR;
266
267	0	*filename = NULL;
268
269	0	for (match = path; *match != 0; match += 1) {
270	0	if (mz_os_is_dir_separator(*match))
271	0	*filename = match + 1;
272	0	}
273
274	0	if (!*filename)
275	0	return MZ_EXIST_ERROR;
276
277	0	return MZ_OK;
278	0	}
279
280	0	int32_t mz_dir_has_unsafe_symlink(const char path, const char base_path) {
281	0	char *check_path = NULL;
282	0	char *symlink_target = NULL;
283	0	char *combined = NULL;
284	0	char *resolved = NULL;
285	0	size_t path_len = 0;
286	0	size_t base_len = 0;
287	0	size_t alloc_size = 0;
288	0	size_t parent_len = 0;
289	0	size_t pos = 0;
290	0	int32_t err = MZ_OK;
291
292	0	if (!path \|\| *path == 0 \|\| !base_path)
293	0	return MZ_PARAM_ERROR;
294
295	0	path_len = strlen(path);
296	0	base_len = strlen(base_path);
297
298		/* Remove trailing slash from base_path for comparison */
299	0	while (base_len > 0 && mz_os_is_dir_separator(base_path[base_len - 1]))
300	0	base_len--;
301
302		/* Allocate buffers with max size needed: path + symlink target + separator */
303	0	alloc_size = path_len * 2 + 2;
304
305	0	check_path = (char *)calloc(1, path_len + 1);
306	0	symlink_target = (char *)calloc(1, path_len + 1);
307	0	combined = (char *)calloc(1, alloc_size);
308	0	resolved = (char *)calloc(1, alloc_size);
309
310	0	if (!check_path \|\| !symlink_target \|\| !combined \|\| !resolved) {
311	0	err = MZ_MEM_ERROR;
312	0	}
313
314		/* Walk through each path component */
315	0	while (err == MZ_OK && pos < path_len) {
316		/* Copy separator if present */
317	0	if (mz_os_is_dir_separator(path[pos])) {
318	0	check_path[pos] = path[pos];
319	0	pos++;
320	0	}
321
322		/* Copy next path component */
323	0	while (pos < path_len && !mz_os_is_dir_separator(path[pos])) {
324	0	check_path[pos] = path[pos];
325	0	pos++;
326	0	}
327	0	check_path[pos] = 0;
328
329		/* Check if this existing path component is a symlink */
330	0	if (mz_os_is_symlink(check_path) != MZ_OK)
331	0	continue;
332	0	if (mz_os_read_symlink(check_path, symlink_target, (int32_t)(path_len + 1)) != MZ_OK)
333	0	continue;
334
335		/* Absolute symlink targets are not allowed */
336	0	if (mz_os_is_dir_separator(symlink_target[0])) {
337	0	err = MZ_EXIST_ERROR;
338	0	break;
339	0	}
340
341		/* Find parent directory length by scanning backwards past filename and trailing slashes */
342	0	parent_len = pos;
343	0	while (parent_len > 0 && !mz_os_is_dir_separator(check_path[parent_len - 1]))
344	0	parent_len--;
345	0	while (parent_len > 0 && mz_os_is_dir_separator(check_path[parent_len - 1]))
346	0	parent_len--;
347
348		/* Combine parent + symlink_target */
349	0	combined[0] = 0;
350	0	if (parent_len > 0) {
351	0	strncpy(combined, check_path, parent_len);
352	0	combined[parent_len] = 0;
353	0	mz_path_append_slash(combined, (int32_t)alloc_size, MZ_PATH_SLASH_PLATFORM);
354	0	}
355	0	strncat(combined, symlink_target, alloc_size - strlen(combined) - 1);
356
357		/* Resolve the combined path to eliminate .. */
358	0	if (mz_path_resolve(combined, resolved, (int32_t)alloc_size) != MZ_OK) {
359	0	err = MZ_EXIST_ERROR;
360	0	break;
361	0	}
362
363		/* Check that resolved path starts with base_path */
364	0	if (strlen(resolved) < base_len \|\|
365	0	strncmp(resolved, base_path, base_len) != 0 \|\|
366	0	(resolved[base_len] != 0 && !mz_os_is_dir_separator(resolved[base_len]))) {
367	0	err = MZ_EXIST_ERROR;
368	0	break;
369	0	}
370	0	}
371
372	0	free(check_path);
373	0	free(symlink_target);
374	0	free(combined);
375	0	free(resolved);
376
377	0	return err;
378	0	}
379
380	0	int32_t mz_dir_make(const char *path) {
381	0	int32_t err = MZ_OK;
382	0	char *current_dir = NULL;
383	0	char *match = NULL;
384	0	char hold = 0;
385
386	0	if (!*path)
387	0	return MZ_OK;
388
389	0	current_dir = strdup(path);
390	0	if (!current_dir)
391	0	return MZ_MEM_ERROR;
392
393	0	mz_path_remove_slash(current_dir);
394
395	0	err = mz_os_make_dir(current_dir);
396	0	if (err != MZ_OK) {
397	0	match = current_dir + 1;
398	0	while (1) {
399	0	while (match != 0 && !mz_os_is_dir_separator(match))
400	0	match += 1;
401	0	hold = *match;
402	0	*match = 0;
403
404	0	err = mz_os_make_dir(current_dir);
405	0	if (err != MZ_OK)
406	0	break;
407	0	if (hold == 0)
408	0	break;
409
410	0	*match = hold;
411	0	match += 1;
412	0	}
413	0	}
414
415	0	free(current_dir);
416	0	return err;
417	0	}
418
419	0	int32_t mz_file_get_crc(const char path, uint32_t result_crc) {
420	0	void *stream = NULL;
421	0	uint32_t crc32 = 0;
422	0	int32_t read = 0;
423	0	int32_t err = MZ_OK;
424	0	uint8_t buf[16384];
425
426	0	stream = mz_stream_os_create();
427	0	if (!stream)
428	0	return MZ_MEM_ERROR;
429
430	0	err = mz_stream_os_open(stream, path, MZ_OPEN_MODE_READ);
431	0	if (err == MZ_OK) {
432	0	do {
433	0	read = mz_stream_os_read(stream, buf, sizeof(buf));
434
435	0	if (read < 0) {
436	0	err = read;
437	0	break;
438	0	}
439
440	0	crc32 = mz_crypt_crc32_update(crc32, buf, read);
441	0	} while ((err == MZ_OK) && (read > 0));
442
443	0	mz_stream_os_close(stream);
444	0	}
445
446	0	*result_crc = crc32;
447
448	0	mz_stream_os_delete(&stream);
449
450	0	return err;
451	0	}
452
453		/***************************************************************************/