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/* mz_os.c -- System functions
Version 2.0.1, October 16th, 2017
part of the MiniZip project
Copyright (C) 2012-2017 Nathan Moinvaziri
https://github.com/nmoinvaz/minizip
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 <time.h>
#include "mz.h"
#include "mz_strm.h"
#include "mz_os.h"
/***************************************************************************/
int32_t mz_file_exists(const char *path)
{
void *stream = NULL;
int opened = 0;
mz_stream_os_create(&stream);
if (mz_stream_os_open(stream, path, MZ_STREAM_MODE_READ) == MZ_OK)
{
mz_stream_os_close(stream);
opened = 1;
}
mz_stream_os_delete(&stream);
return opened;
}
int64_t mz_file_get_size(const char *path)
{
void *stream = NULL;
int64_t size = 0;
mz_stream_os_create(&stream);
if (mz_stream_os_open(stream, path, MZ_STREAM_MODE_READ) == MZ_OK)
{
mz_stream_os_seek(stream, 0, MZ_STREAM_SEEK_END);
size = mz_stream_os_tell(stream);
mz_stream_os_close(st
C038
ream);
}
mz_stream_os_delete(&stream);
return size;
}
int16_t mz_make_dir(const char *path)
{
int16_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 *)malloc(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;
}
}
free(current_dir);
return err;
}
/***************************************************************************/
int mz_invalid_date(const struct tm *ptm)
{
#define datevalue_in_range(min, max, value) ((min) <= (value) && (value) <= (max))
return (!datevalue_in_range(0, 207, ptm->tm_year) ||
!datevalue_in_range(0, 11, ptm->tm_mon) ||
!datevalue_in_range(1, 31, ptm->tm_mday) ||
!datevalue_in_range(0, 23, ptm->tm_hour) ||
!datevalue_in_range(0, 59, ptm->tm_min) ||
!datevalue_in_range(0, 59, ptm->tm_sec));
#undef datevalue_in_range
}
// Conversion without validation
void mz_dosdate_to_raw_tm(uint64_t dos_date, struct tm *ptm)
{
uint64_t date = (uint64_t)(dos_date >> 16);
ptm->tm_mday = (uint16_t)(date & 0x1f);
ptm->tm_mon = (uint16_t)(((date & 0x1E0) / 0x20) - 1);
ptm->tm_year = (uint16_t)(((date & 0x0FE00) / 0x0200) + 80);
ptm->tm_hour = (uint16_t)((dos_date & 0xF800) / 0x800);
ptm->tm_min = (uint16_t)((dos_date & 0x7E0) / 0x20);
ptm->tm_sec = (uint16_t)(2 * (dos_date & 0x1f));
ptm->tm_isdst = -1;
}
int32_t mz_dosdate_to_tm(uint64_t dos_date, struct tm *ptm)
{
mz_dosdate_to_raw_tm(dos_date, ptm);
if (mz_invalid_date(ptm))
{
// Invalid date stored, so don't return it.
memset(ptm, 0, sizeof(struct tm));
return -1;
}
return 0;
}
time_t mz_dosdate_to_time_t(uint64_t dos_date)
{
struct tm ptm;
mz_dosdate_to_raw_tm(dos_date, &ptm);
return mktime(&ptm);
}
uint32_t mz_tm_to_dosdate(const struct tm *ptm)
{
struct tm fixed_tm = { 0 };
// Years supported:
// [00, 79] (assumed to be between 2000 and 2079)
// [80, 207] (assumed to be between 1980 and 2107, typical output of old
// software that does 'year-1900' to get a double digit year)
// [1980, 2107] (due to the date format limitations, only years between 1980 and 2107 can be stored.)
memcpy(&fixed_tm, ptm, sizeof(struct tm));
if (fixed_tm.tm_year >= 1980) // range [1980, 2107]
fixed_tm.tm_year -= 1980;
else if (fixed_tm.tm_year >= 80) // range [80, 99]
fixed_tm.tm_year -= 80;
else // range [00, 79]
fixed_tm.tm_year += 20;
if (mz_invalid_date(ptm))
return 0;
return (uint32_t)(((fixed_tm.tm_mday) + (32 * (fixed_tm.tm_mon + 1)) + (512 * fixed_tm.tm_year)) << 16) |
((fixed_tm.tm_sec / 2) + (32 * fixed_tm.tm_min) + (2048 * (uint32_t)fixed_tm.tm_hour));
}
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;
}