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279 lines (221 loc) · 6.76 KB
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/* mz_os.c -- System functions
Version 2.3.8, July 14, 2018
part of the MiniZip project
Copyright (C) 2010-2018 Nathan Moinvaziri
https://github.com/nmoinvaz/minizip
Copyright (C) 1998-2010 Gilles Vollant
http://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 <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "mz.h"
#include "mz_os.h"
#include "mz_strm.h"
#include "mz_strm_crc32.h"
/***************************************************************************/
int32_t mz_make_dir(const char *path)
{
int32_t err = MZ_OK;
int16_t len = 0;
char *current_dir = NULL;
char *match = NULL;
char hold = 0;
len = (int16_t)strlen(path);
if (len <= 0)
return 0;
current_dir = (char *)MZ_ALLOC(len + 1);
if (current_dir == NULL)
return MZ_MEM_ERROR;
strcpy(current_dir, path);
if (current_dir[len - 1] == '/')
current_dir[len - 1] = 0;
err = mz_os_make_dir(current_dir);
if (err != MZ_OK)
{
match = current_dir + 1;
while (1)
{
while (*match != 0 && *match != '\\' && *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;
}
}
MZ_FREE(current_dir);
return err;
}
int32_t mz_path_combine(char *path, const char *join, int32_t max_path)
{
int32_t path_len = 0;
if (path == NULL || join == NULL || max_path == 0)
return MZ_PARAM_ERROR;
path_len = strlen(path);
if (path_len == 0)
{
strncpy(path, join, max_path);
}
else
{
if (path[path_len - 1] != '\\' && path[path_len - 1] != '/')
strncat(path, "/", max_path - path_len - 1);
strncat(path, join, max_path - path_len);
}
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 ((*check == '\\') || (*check == '/'))
check += 1;
if ((source == path) || (check != source) || (*target == 0))
{
// Skip double paths
if ((*check == '\\') || (*check == '/'))
{
source += 1;
continue;
}
if ((*check != 0) && (*check == '.'))
{
check += 1;
// Remove current directory . if at end of stirng
if ((*check == 0) && (source != path))
{
// Copy last slash
*target = *source;
target += 1;
max_output -= 1;
source += (check - source);
continue;
}
// Remove current directory . if not at end of stirng
if ((*check == 0) || (*check == '\\' || *check == '/'))
{
// Only proceed if .\ is not entire string
if (check[1] != 0 || (path != source))
{
source += (check - source);
continue;
}
}
// Go to parent directory ..
if ((*check != 0) || (*check == '.'))
{
check += 1;
if ((*check == 0) || (*check == '\\' || *check == '/'))
{
source += (check - source);
// Search backwards for previous slash
if (target != output)
{
target -= 1;
do
{
if ((*target == '\\') || (*target == '/'))
break;
target -= 1;
max_output += 1;
}
while (target > output);
}
if ((target == output) && (*source != 0))
source += 1;
if ((*target == '\\' || *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(const char *path)
{
char *path_ptr = NULL;
if (path == NULL)
return MZ_PARAM_ERROR;
path_ptr = (char *)(path + strlen(path) - 1);
while (path_ptr > path)
{
if ((*path_ptr == '/') || (*path_ptr == '\\'))
{
*path_ptr = 0;
break;
}
path_ptr -= 1;
}
return MZ_OK;
}
int32_t mz_path_get_filename(const char *path, const char **filename)
{
const char *match = NULL;
if (path == NULL || filename == NULL)
return MZ_PARAM_ERROR;
*filename = NULL;
for (match = path; *match != 0; match += 1)
{
if ((*match == '\\') || (*match == '/'))
*filename = match + 1;
}
if (*filename == NULL)
return MZ_EXIST_ERROR;
return MZ_OK;
}
int32_t mz_get_file_crc(const char *path, uint32_t *result_crc)
{
void *stream = NULL;
void *crc32_stream = NULL;
int32_t read = 0;
int32_t err = MZ_OK;
uint8_t buf[INT16_MAX];
mz_stream_os_create(&stream);
err = mz_stream_os_open(stream, path, MZ_OPEN_MODE_READ);
mz_stream_crc32_create(&crc32_stream);
mz_stream_crc32_open(crc32_stream, NULL, MZ_OPEN_MODE_READ);
mz_stream_set_base(crc32_stream, stream);
if (err == MZ_OK)
{
do
{
read = mz_stream_crc32_read(crc32_stream, buf, sizeof(buf));
if (read < 0)
{
err = read;
break;
}
}
while ((err == MZ_OK) && (read > 0));
mz_stream_os_close(stream);
}
mz_stream_crc32_close(crc32_stream);
*result_crc = mz_stream_crc32_get_value(crc32_stream);
mz_stream_crc32_delete(&crc32_stream);
mz_stream_os_delete(&stream);
return err;
}