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src/liblzma/simple/arm.c
74 строки
2 KB
Lasse Collin
Add SPDX license identifier into 0BSD source code files.
14 фев 2024, 19:31
14 фев 2024, 19:31
22af941
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// SPDX-License-Identifier: 0BSD /////////////////////////////////////////////////////////////////////////////// // /// \file arm.c /// \brief Filter for ARM binaries /// // Authors: Igor Pavlov // Lasse Collin // /////////////////////////////////////////////////////////////////////////////// #include "simple_private.h" static size_t arm_code(void *simple lzma_attribute((__unused__)), uint32_t now_pos, bool is_encoder, uint8_t *buffer, size_t size) { size_t i; for (i = 0; i + 4 <= size; i += 4) { if (buffer[i + 3] == 0xEB) { uint32_t src = ((uint32_t)(buffer[i + 2]) << 16) | ((uint32_t)(buffer[i + 1]) << 8) | (uint32_t)(buffer[i + 0]); src <<= 2; uint32_t dest; if (is_encoder) dest = now_pos + (uint32_t)(i) + 8 + src; else dest = src - (now_pos + (uint32_t)(i) + 8); dest >>= 2; buffer[i + 2] = (dest >> 16); buffer[i + 1] = (dest >> 8); buffer[i + 0] = dest; } } return i; } static lzma_ret arm_coder_init(lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters, bool is_encoder) { return lzma_simple_coder_init(next, allocator, filters, &arm_code, 0, 4, 4, is_encoder); } #ifdef HAVE_ENCODER_ARM extern lzma_ret lzma_simple_arm_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters) { return arm_coder_init(next, allocator, filters, true); } #endif #ifdef HAVE_DECODER_ARM extern lzma_ret lzma_simple_arm_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters) { return arm_coder_init(next, allocator, filters, false); } #endif