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///////////////////////////////////////////////////////////////////////////////
//
/// \file raw_encoder.c
/// \brief Raw encoder initialization API
//
// Copyright (C) 2007 Lasse Collin
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
///////////////////////////////////////////////////////////////////////////////
#include "raw_encoder.h"
#include "copy_coder.h"
#include "simple_coder.h"
#include "subblock_encoder.h"
#include "delta_encoder.h"
#include "lzma_encoder.h"
struct lzma_coder_s {
lzma_next_coder next;
lzma_vli uncompressed_size;
};
static lzma_init_function
get_function(lzma_vli id)
{
switch (id) {
#ifdef HAVE_FILTER_COPY
case LZMA_FILTER_COPY:
return &lzma_copy_encoder_init;
#endif
#ifdef HAVE_FILTER_SUBBLOCK
case LZMA_FILTER_SUBBLOCK:
return &lzma_subblock_encoder_init;
#endif
#ifdef HAVE_FILTER_X86
case LZMA_FILTER_X86:
return &lzma_simple_x86_encoder_init;
#endif
#ifdef HAVE_FILTER_POWERPC
case LZMA_FILTER_POWERPC:
return &lzma_simple_powerpc_encoder_init;
#endif
#ifdef HAVE_FILTER_IA64
case LZMA_FILTER_IA64:
return &lzma_simple_ia64_encoder_init;
#endif
#ifdef HAVE_FILTER_ARM
case LZMA_FILTER_ARM:
return &lzma_simple_arm_encoder_init;
#endif
#ifdef HAVE_FILTER_ARMTHUMB
case LZMA_FILTER_ARMTHUMB:
return &lzma_simple_armthumb_encoder_init;
#endif
#ifdef HAVE_FILTER_SPARC
case LZMA_FILTER_SPARC:
return &lzma_simple_sparc_encoder_init;
#endif
#ifdef HAVE_FILTER_DELTA
case LZMA_FILTER_DELTA:
return &lzma_delta_encoder_init;
#endif
#ifdef HAVE_FILTER_LZMA
case LZMA_FILTER_LZMA:
return &lzma_lzma_encoder_init;
#endif
}
return NULL;
}
static lzma_ret
raw_encode(lzma_coder *coder, lzma_allocator *allocator,
const uint8_t *restrict in, size_t *restrict in_pos,
size_t in_size, uint8_t *restrict out,
size_t *restrict out_pos, size_t out_size, lzma_action action)
{
// Check that our amount of input stays in proper limits.
if (coder->uncompressed_size != LZMA_VLI_VALUE_UNKNOWN) {
if (action == LZMA_FINISH) {
if (coder->uncompressed_size != in_size - *in_pos)
return LZMA_PROG_ERROR;
} else {
if (coder->uncompressed_size < in_size - *in_pos)
return LZMA_PROG_ERROR;
}
}
const size_t in_start = *in_pos;
const lzma_ret ret = coder->next.code(coder->next.coder, allocator,
in, in_pos, in_size, out, out_pos, out_size, action);
if (coder->uncompressed_size != LZMA_VLI_VALUE_UNKNOWN)
coder->uncompressed_size -= *in_pos - in_start;
return ret;
}
static void
raw_encoder_end(lzma_coder *coder, lzma_allocator *allocator)
{
lzma_next_coder_end(&coder->next, allocator);
lzma_free(coder, allocator);
return;
}
static lzma_ret
raw_encoder_init(lzma_next_coder *next, lzma_allocator *allocator,
const lzma_options_filter *options,
lzma_vli uncompressed_size, bool allow_implicit)
{
if (next->coder == NULL) {
next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
if (next->coder == NULL)
return LZMA_MEM_ERROR;
next->code = &raw_encode;
next->end = &raw_encoder_end;
next->coder->next = LZMA_NEXT_CODER_INIT;
}
next->coder->uncompressed_size = uncompressed_size;
// lzma_raw_coder_init() accesses get_function() via function pointer,
// because this way linker doesn't statically link both encoder and
// decoder functions if user needs only encoder or decoder.
return lzma_raw_coder_init(&next->coder->next, allocator,
options, uncompressed_size,
&get_function, allow_implicit, true);
}
extern lzma_ret
lzma_raw_encoder_init(lzma_next_coder *next, lzma_allocator *allocator,
const lzma_options_filter *options,
lzma_vli uncompressed_size, bool allow_implicit)
{
lzma_next_coder_init(raw_encoder_init, next, allocator,
options, uncompressed_size, allow_implicit);
}
extern LZMA_API lzma_ret
lzma_raw_encoder(lzma_stream *strm, const lzma_options_filter *options,
lzma_vli uncompressed_size, lzma_bool allow_implicit)
{
lzma_next_strm_init(strm, raw_encoder_init,
options, uncompressed_size, allow_implicit);
strm->internal->supported_actions[LZMA_RUN] = true;
strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
strm->internal->supported_actions[LZMA_FINISH] = true;
return LZMA_OK;
}
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