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Copy pathmz_strm_split.c
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373 lines (317 loc) · 9.72 KB
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/* mz_strm_split.c -- Stream for split files
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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mz.h"
#include "mz_strm.h"
#include "mz_strm_split.h"
/***************************************************************************/
mz_stream_vtbl mz_stream_split_vtbl = {
mz_stream_split_open,
mz_stream_split_is_open,
mz_stream_split_read,
mz_stream_split_write,
mz_stream_split_tell,
mz_stream_split_seek,
mz_stream_split_close,
mz_stream_split_error,
mz_stream_split_create,
mz_stream_split_delete,
mz_stream_split_get_prop_int64,
mz_stream_split_set_prop_int64
};
/***************************************************************************/
typedef struct mz_stream_split_s {
mz_stream stream;
int32_t is_open;
int64_t disk_size;
int64_t total_in;
int64_t total_in_disk;
int64_t total_out;
int64_t total_out_disk;
int32_t mode;
char *path_cd;
int32_t path_cd_size;
char *path_disk;
int32_t path_disk_size;
int32_t number_disk;
int32_t current_disk;
int32_t reached_end;
} mz_stream_split;
/***************************************************************************/
int32_t mz_stream_split_open_disk(void *stream, int32_t number_disk)
{
mz_stream_split *split = (mz_stream_split *)stream;
uint32_t magic = 0;
int32_t i = 0;
int16_t err = MZ_OK;
if (number_disk >= 0)
{
for (i = strlen(split->path_disk) - 1; i >= 0; i -= 1)
{
if (split->path_disk[i] != '.')
continue;
snprintf(&split->path_disk[i], split->path_disk_size - i, ".z%02d", number_disk + 1);
break;
}
}
else
{
strncpy(split->path_disk, split->path_cd, split->path_disk_size);
}
err = mz_stream_open(split->stream.base, split->path_disk, split->mode);
if (err == MZ_OK)
{
split->total_in_disk = 0;
split->total_out_disk = 0;
split->current_disk = number_disk;
if (split->mode & MZ_STREAM_MODE_WRITE)
{
if (split->current_disk == 0)
{
err = mz_stream_write_uint32(split->stream.base, MZ_ZIP_MAGIC_DISKHEADER);
split->total_out_disk += 4;
split->total_out += split->total_out_disk;
}
}
else if (split->mode & MZ_STREAM_MODE_READ)
{
if (split->current_disk == 0)
{
err = mz_stream_read_uint32(split->stream.base, &magic);
if (magic != MZ_ZIP_MAGIC_DISKHEADER)
err = MZ_FORMAT_ERROR;
}
}
}
if (err == MZ_OK)
split->is_open = 1;
return err;
}
int32_t mz_stream_split_close_disk(void *stream)
{
mz_stream_split *split = (mz_stream_split *)stream;
if (mz_stream_is_open(split->stream.base) != MZ_OK)
return MZ_OK;
return mz_stream_close(split->stream.base);
}
int32_t mz_stream_split_goto_disk(void *stream, int32_t number_disk)
{
mz_stream_split *split = (mz_stream_split *)stream;
int16_t err = MZ_OK;
if (number_disk != split->current_disk)
{
err = mz_stream_split_close_disk(stream);
if (err == MZ_OK)
{
err = mz_stream_split_open_disk(stream, number_disk);
if (err == MZ_OK)
split->number_disk = number_disk;
}
}
return err;
}
int32_t mz_stream_split_open(void *stream, const char *path, int32_t mode)
{
mz_stream_split *split = (mz_stream_split *)stream;
int32_t number_disk = 0;
split->mode = mode;
split->path_cd_size = strlen(path) + 1;
split->path_cd = (char *)malloc(split->path_cd_size);
strncpy(split->path_cd, path, split->path_cd_size);
split->path_disk_size = strlen(path) + 10;
split->path_disk = (char *)malloc(split->path_disk_size);
strncpy(split->path_disk, path, split->path_disk_size);
if (mode & MZ_STREAM_MODE_WRITE)
{
number_disk = 0;
split->current_disk = -1;
}
else if (mode & MZ_STREAM_MODE_READ)
{
number_disk = -1;
split->current_disk = 0;
}
return mz_stream_split_goto_disk(stream, number_disk);
}
int32_t mz_stream_split_is_open(void *stream)
{
mz_stream_split *split = (mz_stream_split *)stream;
if (split->is_open == 1)
return MZ_OK;
return MZ_STREAM_ERROR;
}
int32_t mz_stream_split_read(void *stream, void *buf, int32_t size)
{
mz_stream_split *split = (mz_stream_split *)stream;
int32_t bytes_to_read = 0;
int32_t bytes_left = size;
int32_t read = 0;
int16_t err = MZ_OK;
uint8_t *buf_ptr = (uint8_t *)buf;
err = mz_stream_split_goto_disk(stream, split->number_disk);
if (err != MZ_OK)
return err;
while (bytes_left > 0)
{
read = mz_stream_read(split->stream.base, buf_ptr, bytes_left);
if (read < 0)
return read;
if (read == 0)
{
if (split->current_disk < 0) // No more disks to goto
break;
err = mz_stream_split_goto_disk(stream, split->current_disk + 1);
if (err == MZ_EXIST_ERROR)
break;
if (err != MZ_OK)
return err;
}
bytes_left -= read;
buf_ptr += read;
split->total_in += read;
split->total_in_disk += read;
}
return size - bytes_left;
}
int32_t mz_stream_split_write(void *stream, const void *buf, int32_t size)
{
mz_stream_split *split = (mz_stream_split *)stream;
int32_t written = 0;
int32_t bytes_left = size;
int32_t bytes_to_write = 0;
int32_t bytes_avail = 0;
int32_t number_disk = -1;
int16_t err = MZ_OK;
uint8_t *buf_ptr = (uint8_t *)buf;
while (bytes_left > 0)
{
if ((split->total_out_disk == split->disk_size && split->total_out > 0) ||
(split->number_disk == -1 && split->number_disk != split->current_disk))
{
if (split->number_disk != -1)
number_disk = split->current_disk + 1;
err = mz_stream_split_goto_disk(stream, number_disk);
if (err != MZ_OK)
return err;
}
bytes_to_write = bytes_left;
if (split->number_disk != -1)
{
bytes_avail = (int32_t)(split->disk_size - split->total_out_disk);
if (bytes_to_write > bytes_avail)
bytes_to_write = bytes_avail;
}
written = mz_stream_write(split->stream.base, buf_ptr, bytes_to_write);
if (written != bytes_to_write)
return MZ_STREAM_ERROR;
bytes_left -= written;
buf_ptr += written;
split->total_out += written;
split->total_out_disk += written;
}
return size - bytes_left;
}
int64_t mz_stream_split_tell(void *stream)
{
mz_stream_split *split = (mz_stream_split *)stream;
int16_t err = MZ_OK;
err = mz_stream_split_goto_disk(stream, split->number_disk);
if (err != MZ_OK)
return err;
return mz_stream_tell(split->stream.base);
}
int32_t mz_stream_split_seek(void *stream, int64_t offset, int32_t origin)
{
mz_stream_split *split = (mz_stream_split *)stream;
int32_t err = MZ_OK;
err = mz_stream_split_goto_disk(stream, split->number_disk);
if (err != MZ_OK)
return err;
return mz_stream_seek(split->stream.base, offset, origin);
}
int32_t mz_stream_split_close(void *stream)
{
mz_stream_split *split = (mz_stream_split *)stream;
int16_t err = MZ_OK;
err = mz_stream_split_close_disk(stream);
split->is_open = 0;
return err;
}
int32_t mz_stream_split_error(void *stream)
{
mz_stream_split *split = (mz_stream_split *)stream;
return mz_stream_error(split->stream.base);
}
int32_t mz_stream_split_get_prop_int64(void *stream, int32_t prop, int64_t *value)
{
mz_stream_split *split = (mz_stream_split *)stream;
switch (prop)
{
case MZ_STREAM_PROP_TOTAL_OUT:
*value = split->total_out;
return MZ_OK;
case MZ_STREAM_PROP_DISK_NUMBER:
*value = split->number_disk;
return MZ_OK;
case MZ_STREAM_PROP_DISK_SIZE:
*value = split->disk_size;
return MZ_OK;
}
return MZ_EXIST_ERROR;
}
int32_t mz_stream_split_set_prop_int64(void *stream, int32_t prop, int64_t value)
{
mz_stream_split *split = (mz_stream_split *)stream;
switch (prop)
{
case MZ_STREAM_PROP_DISK_NUMBER:
split->number_disk = (int32_t)value;
return MZ_OK;
case MZ_STREAM_PROP_DISK_SIZE:
split->disk_size = value;
return MZ_OK;
}
return MZ_EXIST_ERROR;
}
void *mz_stream_split_create(void **stream)
{
mz_stream_split *split = NULL;
split = (mz_stream_split *)malloc(sizeof(mz_stream_split));
if (split != NULL)
{
memset(split, 0, sizeof(mz_stream_split));
split->stream.vtbl = &mz_stream_split_vtbl;
split->disk_size = 64 * 1024;
}
if (stream != NULL)
*stream = split;
return split;
}
void mz_stream_split_delete(void **stream)
{
mz_stream_split *split = NULL;
if (stream == NULL)
return;
split = (mz_stream_split *)*stream;
if (split != NULL)
{
if (split->path_cd)
free(split->path_cd);
if (split->path_disk)
free(split->path_disk);
free(split);
}
*stream = NULL;
}
void *mz_stream_split_get_interface(void)
{
return (void *)&mz_stream_split_vtbl;
}