561 lines
16 KiB
C
561 lines
16 KiB
C
/* mz_strm.c -- Stream interface
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part of the minizip-ng project
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Copyright (C) 2010-2021 Nathan Moinvaziri
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https://github.com/zlib-ng/minizip-ng
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This program is distributed under the terms of the same license as zlib.
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See the accompanying LICENSE file for the full text of the license.
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*/
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#include "mz.h"
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#include "mz_strm.h"
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/***************************************************************************/
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#define MZ_STREAM_FIND_SIZE (1024)
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/***************************************************************************/
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int32_t mz_stream_open(void *stream, const char *path, int32_t mode) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->open == NULL)
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return MZ_STREAM_ERROR;
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return strm->vtbl->open(strm, path, mode);
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}
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int32_t mz_stream_is_open(void *stream) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->is_open == NULL)
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return MZ_STREAM_ERROR;
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return strm->vtbl->is_open(strm);
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}
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int32_t mz_stream_read(void *stream, void *buf, int32_t size) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->read == NULL)
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return MZ_PARAM_ERROR;
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if (mz_stream_is_open(stream) != MZ_OK)
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return MZ_STREAM_ERROR;
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return strm->vtbl->read(strm, buf, size);
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}
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static int32_t mz_stream_read_value(void *stream, uint64_t *value, int32_t len) {
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uint8_t buf[8];
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int32_t n = 0;
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int32_t i = 0;
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*value = 0;
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if (mz_stream_read(stream, buf, len) == len) {
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for (n = 0; n < len; n += 1, i += 8)
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*value += ((uint64_t)buf[n]) << i;
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} else if (mz_stream_error(stream))
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return MZ_STREAM_ERROR;
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else
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return MZ_END_OF_STREAM;
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return MZ_OK;
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}
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int32_t mz_stream_read_uint8(void *stream, uint8_t *value) {
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int32_t err = MZ_OK;
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uint64_t value64 = 0;
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*value = 0;
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err = mz_stream_read_value(stream, &value64, sizeof(uint8_t));
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if (err == MZ_OK)
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*value = (uint8_t)value64;
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return err;
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}
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int32_t mz_stream_read_uint16(void *stream, uint16_t *value) {
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int32_t err = MZ_OK;
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uint64_t value64 = 0;
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*value = 0;
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err = mz_stream_read_value(stream, &value64, sizeof(uint16_t));
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if (err == MZ_OK)
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*value = (uint16_t)value64;
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return err;
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}
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int32_t mz_stream_read_uint32(void *stream, uint32_t *value) {
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int32_t err = MZ_OK;
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uint64_t value64 = 0;
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*value = 0;
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err = mz_stream_read_value(stream, &value64, sizeof(uint32_t));
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if (err == MZ_OK)
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*value = (uint32_t)value64;
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return err;
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}
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int32_t mz_stream_read_int64(void *stream, int64_t *value) {
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return mz_stream_read_value(stream, (uint64_t *)value, sizeof(uint64_t));
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}
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int32_t mz_stream_read_uint64(void *stream, uint64_t *value) {
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return mz_stream_read_value(stream, value, sizeof(uint64_t));
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}
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int32_t mz_stream_write(void *stream, const void *buf, int32_t size) {
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mz_stream *strm = (mz_stream *)stream;
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if (size == 0)
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return size;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->write == NULL)
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return MZ_PARAM_ERROR;
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if (mz_stream_is_open(stream) != MZ_OK)
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return MZ_STREAM_ERROR;
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return strm->vtbl->write(strm, buf, size);
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}
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static int32_t mz_stream_write_value(void *stream, uint64_t value, int32_t len) {
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uint8_t buf[8];
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int32_t n = 0;
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for (n = 0; n < len; n += 1) {
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buf[n] = (uint8_t)(value & 0xff);
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value >>= 8;
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}
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if (value != 0) {
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/* Data overflow - hack for ZIP64 (X Roche) */
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for (n = 0; n < len; n += 1)
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buf[n] = 0xff;
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}
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if (mz_stream_write(stream, buf, len) != len)
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return MZ_STREAM_ERROR;
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return MZ_OK;
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}
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int32_t mz_stream_write_uint8(void *stream, uint8_t value) {
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return mz_stream_write_value(stream, value, sizeof(uint8_t));
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}
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int32_t mz_stream_write_uint16(void *stream, uint16_t value) {
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return mz_stream_write_value(stream, value, sizeof(uint16_t));
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}
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int32_t mz_stream_write_uint32(void *stream, uint32_t value) {
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return mz_stream_write_value(stream, value, sizeof(uint32_t));
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}
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int32_t mz_stream_write_int64(void *stream, int64_t value) {
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return mz_stream_write_value(stream, (uint64_t)value, sizeof(uint64_t));
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}
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int32_t mz_stream_write_uint64(void *stream, uint64_t value) {
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return mz_stream_write_value(stream, value, sizeof(uint64_t));
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}
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int32_t mz_stream_copy(void *target, void *source, int32_t len) {
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return mz_stream_copy_stream(target, NULL, source, NULL, len);
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}
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int32_t mz_stream_copy_to_end(void *target, void *source) {
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return mz_stream_copy_stream_to_end(target, NULL, source, NULL);
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}
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int32_t mz_stream_copy_stream(void *target, mz_stream_write_cb write_cb, void *source,
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mz_stream_read_cb read_cb, int32_t len) {
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uint8_t buf[16384];
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int32_t bytes_to_copy = 0;
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int32_t read = 0;
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int32_t written = 0;
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if (write_cb == NULL)
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write_cb = mz_stream_write;
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if (read_cb == NULL)
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read_cb = mz_stream_read;
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while (len > 0) {
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bytes_to_copy = len;
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if (bytes_to_copy > (int32_t)sizeof(buf))
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bytes_to_copy = sizeof(buf);
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read = read_cb(source, buf, bytes_to_copy);
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if (read <= 0)
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return MZ_STREAM_ERROR;
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written = write_cb(target, buf, read);
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if (written != read)
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return MZ_STREAM_ERROR;
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len -= read;
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}
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return MZ_OK;
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}
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int32_t mz_stream_copy_stream_to_end(void *target, mz_stream_write_cb write_cb, void *source,
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mz_stream_read_cb read_cb) {
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uint8_t buf[16384];
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int32_t read = 0;
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int32_t written = 0;
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if (write_cb == NULL)
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write_cb = mz_stream_write;
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if (read_cb == NULL)
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read_cb = mz_stream_read;
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read = read_cb(source, buf, sizeof(buf));
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while (read > 0) {
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written = write_cb(target, buf, read);
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if (written != read)
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return MZ_STREAM_ERROR;
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read = read_cb(source, buf, sizeof(buf));
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}
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if (read < 0)
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return MZ_STREAM_ERROR;
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return MZ_OK;
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}
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int64_t mz_stream_tell(void *stream) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->tell == NULL)
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return MZ_PARAM_ERROR;
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if (mz_stream_is_open(stream) != MZ_OK)
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return MZ_STREAM_ERROR;
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return strm->vtbl->tell(strm);
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}
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int32_t mz_stream_seek(void *stream, int64_t offset, int32_t origin) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->seek == NULL)
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return MZ_PARAM_ERROR;
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if (mz_stream_is_open(stream) != MZ_OK)
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return MZ_STREAM_ERROR;
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if (origin == MZ_SEEK_SET && offset < 0)
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return MZ_SEEK_ERROR;
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return strm->vtbl->seek(strm, offset, origin);
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}
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int32_t mz_stream_find(void *stream, const void *find, int32_t find_size, int64_t max_seek, int64_t *position) {
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uint8_t buf[MZ_STREAM_FIND_SIZE];
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int32_t buf_pos = 0;
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int32_t read_size = sizeof(buf);
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int32_t read = 0;
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int64_t read_pos = 0;
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int64_t start_pos = 0;
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int64_t disk_pos = 0;
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int32_t i = 0;
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uint8_t first = 1;
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int32_t err = MZ_OK;
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if (stream == NULL || find == NULL || position == NULL)
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return MZ_PARAM_ERROR;
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if (find_size < 0 || find_size >= (int32_t)sizeof(buf))
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return MZ_PARAM_ERROR;
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*position = -1;
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start_pos = mz_stream_tell(stream);
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while (read_pos < max_seek) {
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if (read_size > (int32_t)(max_seek - read_pos - buf_pos) && (max_seek - read_pos - buf_pos) < (int64_t)sizeof(buf))
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read_size = (int32_t)(max_seek - read_pos - buf_pos);
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read = mz_stream_read(stream, buf + buf_pos, read_size);
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if ((read <= 0) || (read + buf_pos < find_size))
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break;
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for (i = 0; i <= read + buf_pos - find_size; i += 1) {
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if (memcmp(&buf[i], find, find_size) != 0)
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continue;
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disk_pos = mz_stream_tell(stream);
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/* Seek to position on disk where the data was found */
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err = mz_stream_seek(stream, disk_pos - ((int64_t)read + buf_pos - i), MZ_SEEK_SET);
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if (err != MZ_OK)
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return MZ_EXIST_ERROR;
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*position = start_pos + read_pos + i;
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return MZ_OK;
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}
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if (first) {
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read -= find_size;
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read_size -= find_size;
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buf_pos = find_size;
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first = 0;
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}
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memmove(buf, buf + read, find_size);
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read_pos += read;
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}
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return MZ_EXIST_ERROR;
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}
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int32_t mz_stream_find_reverse(void *stream, const void *find, int32_t find_size, int64_t max_seek, int64_t *position) {
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uint8_t buf[MZ_STREAM_FIND_SIZE];
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int32_t buf_pos = 0;
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int32_t read_size = MZ_STREAM_FIND_SIZE;
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int64_t read_pos = 0;
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int32_t read = 0;
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int64_t start_pos = 0;
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int64_t disk_pos = 0;
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uint8_t first = 1;
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int32_t i = 0;
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int32_t err = MZ_OK;
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if (stream == NULL || find == NULL || position == NULL)
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return MZ_PARAM_ERROR;
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if (find_size < 0 || find_size >= (int32_t)sizeof(buf))
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return MZ_PARAM_ERROR;
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*position = -1;
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start_pos = mz_stream_tell(stream);
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while (read_pos < max_seek) {
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if (read_size > (int32_t)(max_seek - read_pos) && (max_seek - read_pos) < (int64_t)sizeof(buf))
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read_size = (int32_t)(max_seek - read_pos);
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if (mz_stream_seek(stream, start_pos - (read_pos + read_size), MZ_SEEK_SET) != MZ_OK)
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break;
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read = mz_stream_read(stream, buf, read_size);
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if ((read <= 0) || (read + buf_pos < find_size))
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break;
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if (read + buf_pos < MZ_STREAM_FIND_SIZE)
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memmove(buf + MZ_STREAM_FIND_SIZE - (read + buf_pos), buf, read);
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for (i = find_size; i <= (read + buf_pos); i += 1) {
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if (memcmp(&buf[MZ_STREAM_FIND_SIZE - i], find, find_size) != 0)
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continue;
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disk_pos = mz_stream_tell(stream);
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/* Seek to position on disk where the data was found */
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err = mz_stream_seek(stream, disk_pos + buf_pos - i, MZ_SEEK_SET);
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if (err != MZ_OK)
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return MZ_EXIST_ERROR;
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*position = start_pos - (read_pos - buf_pos + i);
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return MZ_OK;
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}
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if (first) {
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read -= find_size;
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read_size -= find_size;
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buf_pos = find_size;
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first = 0;
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}
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if (read == 0)
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break;
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memmove(buf + read_size, buf, find_size);
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read_pos += read;
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}
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return MZ_EXIST_ERROR;
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}
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int32_t mz_stream_close(void *stream) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->close == NULL)
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return MZ_PARAM_ERROR;
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if (mz_stream_is_open(stream) != MZ_OK)
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return MZ_STREAM_ERROR;
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return strm->vtbl->close(strm);
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}
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int32_t mz_stream_error(void *stream) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->error == NULL)
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return MZ_PARAM_ERROR;
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return strm->vtbl->error(strm);
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}
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int32_t mz_stream_set_base(void *stream, void *base) {
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mz_stream *strm = (mz_stream *)stream;
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strm->base = (mz_stream *)base;
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return MZ_OK;
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}
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void* mz_stream_get_interface(void *stream) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL)
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return NULL;
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return (void *)strm->vtbl;
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}
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int32_t mz_stream_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->get_prop_int64 == NULL)
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return MZ_PARAM_ERROR;
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return strm->vtbl->get_prop_int64(stream, prop, value);
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}
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int32_t mz_stream_set_prop_int64(void *stream, int32_t prop, int64_t value) {
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mz_stream *strm = (mz_stream *)stream;
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if (strm == NULL || strm->vtbl == NULL || strm->vtbl->set_prop_int64 == NULL)
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return MZ_PARAM_ERROR;
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return strm->vtbl->set_prop_int64(stream, prop, value);
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}
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void *mz_stream_create(void **stream, mz_stream_vtbl *vtbl) {
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if (stream == NULL)
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return NULL;
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if (vtbl == NULL || vtbl->create == NULL)
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return NULL;
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return vtbl->create(stream);
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}
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void mz_stream_delete(void **stream) {
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mz_stream *strm = NULL;
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if (stream == NULL)
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return;
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strm = (mz_stream *)*stream;
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if (strm != NULL && strm->vtbl != NULL && strm->vtbl->destroy != NULL)
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strm->vtbl->destroy(stream);
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*stream = NULL;
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}
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/***************************************************************************/
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typedef struct mz_stream_raw_s {
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mz_stream stream;
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int64_t total_in;
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int64_t total_out;
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int64_t max_total_in;
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} mz_stream_raw;
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/***************************************************************************/
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int32_t mz_stream_raw_open(void *stream, const char *path, int32_t mode) {
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MZ_UNUSED(stream);
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MZ_UNUSED(path);
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MZ_UNUSED(mode);
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return MZ_OK;
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}
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int32_t mz_stream_raw_is_open(void *stream) {
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mz_stream_raw *raw = (mz_stream_raw *)stream;
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return mz_stream_is_open(raw->stream.base);
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}
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int32_t mz_stream_raw_read(void *stream, void *buf, int32_t size) {
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mz_stream_raw *raw = (mz_stream_raw *)stream;
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int32_t bytes_to_read = size;
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int32_t read = 0;
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if (raw->max_total_in > 0) {
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if ((int64_t)bytes_to_read > (raw->max_total_in - raw->total_in))
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bytes_to_read = (int32_t)(raw->max_total_in - raw->total_in);
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}
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read = mz_stream_read(raw->stream.base, buf, bytes_to_read);
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if (read > 0) {
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raw->total_in += read;
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raw->total_out += read;
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}
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return read;
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}
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int32_t mz_stream_raw_write(void *stream, const void *buf, int32_t size) {
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mz_stream_raw *raw = (mz_stream_raw *)stream;
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int32_t written = 0;
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written = mz_stream_write(raw->stream.base, buf, size);
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if (written > 0) {
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raw->total_out += written;
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raw->total_in += written;
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}
|
|
|
|
return written;
|
|
}
|
|
|
|
int64_t mz_stream_raw_tell(void *stream) {
|
|
mz_stream_raw *raw = (mz_stream_raw *)stream;
|
|
return mz_stream_tell(raw->stream.base);
|
|
}
|
|
|
|
int32_t mz_stream_raw_seek(void *stream, int64_t offset, int32_t origin) {
|
|
mz_stream_raw *raw = (mz_stream_raw *)stream;
|
|
return mz_stream_seek(raw->stream.base, offset, origin);
|
|
}
|
|
|
|
int32_t mz_stream_raw_close(void *stream) {
|
|
MZ_UNUSED(stream);
|
|
return MZ_OK;
|
|
}
|
|
|
|
int32_t mz_stream_raw_error(void *stream) {
|
|
mz_stream_raw *raw = (mz_stream_raw *)stream;
|
|
return mz_stream_error(raw->stream.base);
|
|
}
|
|
|
|
int32_t mz_stream_raw_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
|
|
mz_stream_raw *raw = (mz_stream_raw *)stream;
|
|
switch (prop) {
|
|
case MZ_STREAM_PROP_TOTAL_IN:
|
|
*value = raw->total_in;
|
|
return MZ_OK;
|
|
case MZ_STREAM_PROP_TOTAL_OUT:
|
|
*value = raw->total_out;
|
|
return MZ_OK;
|
|
}
|
|
return MZ_EXIST_ERROR;
|
|
}
|
|
|
|
int32_t mz_stream_raw_set_prop_int64(void *stream, int32_t prop, int64_t value) {
|
|
mz_stream_raw *raw = (mz_stream_raw *)stream;
|
|
switch (prop) {
|
|
case MZ_STREAM_PROP_TOTAL_IN_MAX:
|
|
raw->max_total_in = value;
|
|
return MZ_OK;
|
|
}
|
|
return MZ_EXIST_ERROR;
|
|
}
|
|
|
|
/***************************************************************************/
|
|
|
|
static mz_stream_vtbl mz_stream_raw_vtbl = {
|
|
mz_stream_raw_open,
|
|
mz_stream_raw_is_open,
|
|
mz_stream_raw_read,
|
|
mz_stream_raw_write,
|
|
mz_stream_raw_tell,
|
|
mz_stream_raw_seek,
|
|
mz_stream_raw_close,
|
|
mz_stream_raw_error,
|
|
mz_stream_raw_create,
|
|
mz_stream_raw_delete,
|
|
mz_stream_raw_get_prop_int64,
|
|
mz_stream_raw_set_prop_int64
|
|
};
|
|
|
|
/***************************************************************************/
|
|
|
|
void *mz_stream_raw_create(void **stream) {
|
|
mz_stream_raw *raw = NULL;
|
|
|
|
raw = (mz_stream_raw *)MZ_ALLOC(sizeof(mz_stream_raw));
|
|
if (raw != NULL) {
|
|
memset(raw, 0, sizeof(mz_stream_raw));
|
|
raw->stream.vtbl = &mz_stream_raw_vtbl;
|
|
}
|
|
if (stream != NULL)
|
|
*stream = raw;
|
|
|
|
return raw;
|
|
}
|
|
|
|
void mz_stream_raw_delete(void **stream) {
|
|
mz_stream_raw *raw = NULL;
|
|
if (stream == NULL)
|
|
return;
|
|
raw = (mz_stream_raw *)*stream;
|
|
if (raw != NULL)
|
|
MZ_FREE(raw);
|
|
*stream = NULL;
|
|
}
|