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542 lines (437 loc) · 15.5 KB
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/* mz_strm.c -- Stream interface
part of the minizip-ng project
Copyright (C) Nathan Moinvaziri
https://github.com/zlib-ng/minizip-ng
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_strm.h"
/***************************************************************************/
#define MZ_STREAM_FIND_SIZE (1024)
/***************************************************************************/
int32_t mz_stream_open(void *stream, const char *path, int32_t mode) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->open)
return MZ_STREAM_ERROR;
return strm->vtbl->open(strm, path, mode);
}
int32_t mz_stream_is_open(void *stream) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->is_open)
return MZ_STREAM_ERROR;
return strm->vtbl->is_open(strm);
}
int32_t mz_stream_read(void *stream, void *buf, int32_t size) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->read)
return MZ_PARAM_ERROR;
if (mz_stream_is_open(stream) != MZ_OK)
return MZ_STREAM_ERROR;
return strm->vtbl->read(strm, buf, size);
}
static int32_t mz_stream_read_value(void *stream, uint64_t *value, int32_t len) {
uint8_t buf[8];
int32_t n = 0;
int32_t i = 0;
*value = 0;
if (mz_stream_read(stream, buf, len) == len) {
for (n = 0; n < len; n += 1, i += 8)
*value += ((uint64_t)buf[n]) << i;
} else if (mz_stream_error(stream))
return MZ_STREAM_ERROR;
else
return MZ_END_OF_STREAM;
return MZ_OK;
}
int32_t mz_stream_read_uint8(void *stream, uint8_t *value) {
int32_t err = MZ_OK;
uint64_t value64 = 0;
*value = 0;
err = mz_stream_read_value(stream, &value64, sizeof(uint8_t));
if (err == MZ_OK)
*value = (uint8_t)value64;
return err;
}
int32_t mz_stream_read_uint16(void *stream, uint16_t *value) {
int32_t err = MZ_OK;
uint64_t value64 = 0;
*value = 0;
err = mz_stream_read_value(stream, &value64, sizeof(uint16_t));
if (err == MZ_OK)
*value = (uint16_t)value64;
return err;
}
int32_t mz_stream_read_uint32(void *stream, uint32_t *value) {
int32_t err = MZ_OK;
uint64_t value64 = 0;
*value = 0;
err = mz_stream_read_value(stream, &value64, sizeof(uint32_t));
if (err == MZ_OK)
*value = (uint32_t)value64;
return err;
}
int32_t mz_stream_read_int64(void *stream, int64_t *value) {
return mz_stream_read_value(stream, (uint64_t *)value, sizeof(uint64_t));
}
int32_t mz_stream_read_uint64(void *stream, uint64_t *value) {
return mz_stream_read_value(stream, value, sizeof(uint64_t));
}
int32_t mz_stream_write(void *stream, const void *buf, int32_t size) {
mz_stream *strm = (mz_stream *)stream;
if (size == 0)
return size;
if (!strm || !strm->vtbl || !strm->vtbl->write)
return MZ_PARAM_ERROR;
if (mz_stream_is_open(stream) != MZ_OK)
return MZ_STREAM_ERROR;
return strm->vtbl->write(strm, buf, size);
}
static int32_t mz_stream_write_value(void *stream, uint64_t value, int32_t len) {
uint8_t buf[8];
int32_t n = 0;
for (n = 0; n < len; n += 1) {
buf[n] = (uint8_t)(value & 0xff);
value >>= 8;
}
if (value != 0) {
/* Data overflow - hack for ZIP64 (X Roche) */
for (n = 0; n < len; n += 1)
buf[n] = 0xff;
}
if (mz_stream_write(stream, buf, len) != len)
return MZ_STREAM_ERROR;
return MZ_OK;
}
int32_t mz_stream_write_uint8(void *stream, uint8_t value) {
return mz_stream_write_value(stream, value, sizeof(uint8_t));
}
int32_t mz_stream_write_uint16(void *stream, uint16_t value) {
return mz_stream_write_value(stream, value, sizeof(uint16_t));
}
int32_t mz_stream_write_uint32(void *stream, uint32_t value) {
return mz_stream_write_value(stream, value, sizeof(uint32_t));
}
int32_t mz_stream_write_int64(void *stream, int64_t value) {
return mz_stream_write_value(stream, (uint64_t)value, sizeof(uint64_t));
}
int32_t mz_stream_write_uint64(void *stream, uint64_t value) {
return mz_stream_write_value(stream, value, sizeof(uint64_t));
}
int32_t mz_stream_copy(void *target, void *source, int32_t len) {
return mz_stream_copy_stream(target, NULL, source, NULL, len);
}
int32_t mz_stream_copy_to_end(void *target, void *source) {
return mz_stream_copy_stream_to_end(target, NULL, source, NULL);
}
int32_t mz_stream_copy_stream(void *target, mz_stream_write_cb write_cb, void *source, mz_stream_read_cb read_cb,
int32_t len) {
uint8_t buf[16384];
int32_t bytes_to_copy = 0;
int32_t read = 0;
int32_t written = 0;
if (!write_cb)
write_cb = mz_stream_write;
if (!read_cb)
read_cb = mz_stream_read;
while (len > 0) {
bytes_to_copy = len;
if (bytes_to_copy > (int32_t)sizeof(buf))
bytes_to_copy = sizeof(buf);
read = read_cb(source, buf, bytes_to_copy);
if (read <= 0)
return MZ_STREAM_ERROR;
written = write_cb(target, buf, read);
if (written != read)
return MZ_STREAM_ERROR;
len -= read;
}
return MZ_OK;
}
int32_t mz_stream_copy_stream_to_end(void *target, mz_stream_write_cb write_cb, void *source,
mz_stream_read_cb read_cb) {
uint8_t buf[16384];
int32_t read = 0;
int32_t written = 0;
if (!write_cb)
write_cb = mz_stream_write;
if (!read_cb)
read_cb = mz_stream_read;
read = read_cb(source, buf, sizeof(buf));
while (read > 0) {
written = write_cb(target, buf, read);
if (written != read)
return MZ_STREAM_ERROR;
read = read_cb(source, buf, sizeof(buf));
}
if (read < 0)
return MZ_STREAM_ERROR;
return MZ_OK;
}
int64_t mz_stream_tell(void *stream) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->tell)
return MZ_PARAM_ERROR;
if (mz_stream_is_open(stream) != MZ_OK)
return MZ_STREAM_ERROR;
return strm->vtbl->tell(strm);
}
int32_t mz_stream_seek(void *stream, int64_t offset, int32_t origin) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->seek)
return MZ_PARAM_ERROR;
if (mz_stream_is_open(stream) != MZ_OK)
return MZ_STREAM_ERROR;
if (origin == MZ_SEEK_SET && offset < 0)
return MZ_SEEK_ERROR;
return strm->vtbl->seek(strm, offset, origin);
}
int32_t mz_stream_find(void *stream, const void *find, int32_t find_size, int64_t max_seek, int64_t *position) {
uint8_t buf[MZ_STREAM_FIND_SIZE];
int32_t buf_pos = 0;
int32_t read_size = sizeof(buf);
int32_t read = 0;
int64_t read_pos = 0;
int64_t start_pos = 0;
int64_t disk_pos = 0;
int32_t i = 0;
uint8_t first = 1;
int32_t err = MZ_OK;
if (!stream || !find || !position)
return MZ_PARAM_ERROR;
if (find_size < 0 || find_size >= (int32_t)sizeof(buf))
return MZ_PARAM_ERROR;
*position = -1;
start_pos = mz_stream_tell(stream);
while (read_pos < max_seek) {
if (read_size > (int32_t)(max_seek - read_pos - buf_pos) &&
(max_seek - read_pos - buf_pos) < (int64_t)sizeof(buf)) {
read_size = (int32_t)(max_seek - read_pos - buf_pos);
}
read = mz_stream_read(stream, buf + buf_pos, read_size);
if ((read <= 0) || (read + buf_pos < find_size))
break;
for (i = 0; i <= read + buf_pos - find_size; i += 1) {
if (memcmp(&buf[i], find, find_size) != 0)
continue;
disk_pos = mz_stream_tell(stream);
/* Seek to position on disk where the data was found */
err = mz_stream_seek(stream, disk_pos - ((int64_t)read + buf_pos - i), MZ_SEEK_SET);
if (err != MZ_OK)
return MZ_EXIST_ERROR;
*position = start_pos + read_pos + i;
return MZ_OK;
}
if (first) {
read -= find_size;
read_size -= find_size;
buf_pos = find_size;
first = 0;
}
memmove(buf, buf + read, find_size);
read_pos += read;
}
return MZ_EXIST_ERROR;
}
int32_t mz_stream_find_reverse(void *stream, const void *find, int32_t find_size, int64_t max_seek, int64_t *position) {
uint8_t buf[MZ_STREAM_FIND_SIZE];
int32_t buf_pos = 0;
int32_t read_size = MZ_STREAM_FIND_SIZE;
int64_t read_pos = 0;
int32_t read = 0;
int64_t start_pos = 0;
int64_t disk_pos = 0;
uint8_t first = 1;
int32_t i = 0;
int32_t err = MZ_OK;
if (!stream || !find || !position)
return MZ_PARAM_ERROR;
if (find_size < 0 || find_size >= (int32_t)sizeof(buf))
return MZ_PARAM_ERROR;
*position = -1;
start_pos = mz_stream_tell(stream);
while (read_pos < max_seek) {
if (read_size > (int32_t)(max_seek - read_pos) && (max_seek - read_pos) < (int64_t)sizeof(buf))
read_size = (int32_t)(max_seek - read_pos);
if (mz_stream_seek(stream, start_pos - (read_pos + read_size), MZ_SEEK_SET) != MZ_OK)
break;
read = mz_stream_read(stream, buf, read_size);
if ((read <= 0) || (read + buf_pos < find_size))
break;
if (read + buf_pos < MZ_STREAM_FIND_SIZE)
memmove(buf + MZ_STREAM_FIND_SIZE - (read + buf_pos), buf, read);
for (i = find_size; i <= (read + buf_pos); i += 1) {
if (memcmp(&buf[MZ_STREAM_FIND_SIZE - i], find, find_size) != 0)
continue;
disk_pos = mz_stream_tell(stream);
/* Seek to position on disk where the data was found */
err = mz_stream_seek(stream, disk_pos + buf_pos - i, MZ_SEEK_SET);
if (err != MZ_OK)
return MZ_EXIST_ERROR;
*position = start_pos - (read_pos - buf_pos + i);
return MZ_OK;
}
if (first) {
read -= find_size;
read_size -= find_size;
buf_pos = find_size;
first = 0;
}
if (read == 0)
break;
memmove(buf + read_size, buf, find_size);
read_pos += read;
}
return MZ_EXIST_ERROR;
}
int32_t mz_stream_close(void *stream) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->close)
return MZ_PARAM_ERROR;
if (mz_stream_is_open(stream) != MZ_OK)
return MZ_STREAM_ERROR;
return strm->vtbl->close(strm);
}
int32_t mz_stream_error(void *stream) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->error)
return MZ_PARAM_ERROR;
return strm->vtbl->error(strm);
}
int32_t mz_stream_set_base(void *stream, void *base) {
mz_stream *strm = (mz_stream *)stream;
strm->base = (mz_stream *)base;
return MZ_OK;
}
void *mz_stream_get_interface(void *stream) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl)
return NULL;
return (void *)strm->vtbl;
}
int32_t mz_stream_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->get_prop_int64)
return MZ_PARAM_ERROR;
return strm->vtbl->get_prop_int64(stream, prop, value);
}
int32_t mz_stream_set_prop_int64(void *stream, int32_t prop, int64_t value) {
mz_stream *strm = (mz_stream *)stream;
if (!strm || !strm->vtbl || !strm->vtbl->set_prop_int64)
return MZ_PARAM_ERROR;
return strm->vtbl->set_prop_int64(stream, prop, value);
}
void *mz_stream_create(mz_stream_vtbl *vtbl) {
if (!vtbl || !vtbl->create)
return NULL;
return vtbl->create();
}
void mz_stream_delete(void **stream) {
mz_stream *strm = NULL;
if (!stream)
return;
strm = (mz_stream *)*stream;
if (strm && strm->vtbl && strm->vtbl->destroy)
strm->vtbl->destroy(stream);
*stream = NULL;
}
/***************************************************************************/
typedef struct mz_stream_raw_s {
mz_stream stream;
int64_t total_in;
int64_t total_out;
int64_t max_total_in;
} mz_stream_raw;
/***************************************************************************/
int32_t mz_stream_raw_open(void *stream, const char *path, int32_t mode) {
MZ_UNUSED(stream);
MZ_UNUSED(path);
MZ_UNUSED(mode);
return MZ_OK;
}
int32_t mz_stream_raw_is_open(void *stream) {
mz_stream_raw *raw = (mz_stream_raw *)stream;
return mz_stream_is_open(raw->stream.base);
}
int32_t mz_stream_raw_read(void *stream, void *buf, int32_t size) {
mz_stream_raw *raw = (mz_stream_raw *)stream;
int32_t bytes_to_read = size;
int32_t read = 0;
if (raw->max_total_in > 0) {
if ((int64_t)bytes_to_read > (raw->max_total_in - raw->total_in))
bytes_to_read = (int32_t)(raw->max_total_in - raw->total_in);
}
read = mz_stream_read(raw->stream.base, buf, bytes_to_read);
if (read > 0) {
raw->total_in += read;
raw->total_out += read;
}
return read;
}
int32_t mz_stream_raw_write(void *stream, const void *buf, int32_t size) {
mz_stream_raw *raw = (mz_stream_raw *)stream;
int32_t written = 0;
written = mz_stream_write(raw->stream.base, buf, size);
if (written > 0) {
raw->total_out += written;
raw->total_in += written;
}
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) {
mz_stream_raw *raw = (mz_stream_raw *)calloc(1, sizeof(mz_stream_raw));
if (raw)
raw->stream.vtbl = &mz_stream_raw_vtbl;
return raw;
}
void mz_stream_raw_delete(void **stream) {
mz_stream_raw *raw = NULL;
if (!stream)
return;
raw = (mz_stream_raw *)*stream;
free(raw);
*stream = NULL;
}