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author | mm <mm@FreeBSD.org> | 2010-05-10 06:59:50 +0000 |
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committer | mm <mm@FreeBSD.org> | 2010-05-10 06:59:50 +0000 |
commit | 5c358d45429b654efa9c8177ecd370a7965ec1a7 (patch) | |
tree | d2d916954c6a66a3168ee356b5f24da01c2017d6 /contrib/xz/src/liblzma/simple/armthumb.c | |
parent | 3e09decd1986826f54af1a47be97bb87c1220783 (diff) | |
parent | 1008b7c6744a190c5b15aaf8cab1054671e4c7c3 (diff) | |
download | FreeBSD-src-5c358d45429b654efa9c8177ecd370a7965ec1a7.zip FreeBSD-src-5c358d45429b654efa9c8177ecd370a7965ec1a7.tar.gz |
Import of liblzma, xz, xzdec, lzmainfo from vendor branch
Add support for xz and lzma to lesspipe.sh (xzless, lzless)
Bump __FreeBSD_version
Approved by: delphij (mentor)
MFC after: 2 weeks
Diffstat (limited to 'contrib/xz/src/liblzma/simple/armthumb.c')
-rw-r--r-- | contrib/xz/src/liblzma/simple/armthumb.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/contrib/xz/src/liblzma/simple/armthumb.c b/contrib/xz/src/liblzma/simple/armthumb.c new file mode 100644 index 0000000..eb6a69d --- /dev/null +++ b/contrib/xz/src/liblzma/simple/armthumb.c @@ -0,0 +1,74 @@ +/////////////////////////////////////////////////////////////////////////////// +// +/// \file armthumb.c +/// \brief Filter for ARM-Thumb binaries +/// +// Authors: Igor Pavlov +// Lasse Collin +// +// This file has been put into the public domain. +// You can do whatever you want with this file. +// +/////////////////////////////////////////////////////////////////////////////// + +#include "simple_private.h" + + +static size_t +armthumb_code(lzma_simple *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 += 2) { + if ((buffer[i + 1] & 0xF8) == 0xF0 + && (buffer[i + 3] & 0xF8) == 0xF8) { + uint32_t src = ((buffer[i + 1] & 0x7) << 19) + | (buffer[i + 0] << 11) + | ((buffer[i + 3] & 0x7) << 8) + | (buffer[i + 2]); + + src <<= 1; + + uint32_t dest; + if (is_encoder) + dest = now_pos + (uint32_t)(i) + 4 + src; + else + dest = src - (now_pos + (uint32_t)(i) + 4); + + dest >>= 1; + buffer[i + 1] = 0xF0 | ((dest >> 19) & 0x7); + buffer[i + 0] = (dest >> 11); + buffer[i + 3] = 0xF8 | ((dest >> 8) & 0x7); + buffer[i + 2] = (dest); + i += 2; + } + } + + return i; +} + + +static lzma_ret +armthumb_coder_init(lzma_next_coder *next, lzma_allocator *allocator, + const lzma_filter_info *filters, bool is_encoder) +{ + return lzma_simple_coder_init(next, allocator, filters, + &armthumb_code, 0, 4, 2, is_encoder); +} + + +extern lzma_ret +lzma_simple_armthumb_encoder_init(lzma_next_coder *next, + lzma_allocator *allocator, const lzma_filter_info *filters) +{ + return armthumb_coder_init(next, allocator, filters, true); +} + + +extern lzma_ret +lzma_simple_armthumb_decoder_init(lzma_next_coder *next, + lzma_allocator *allocator, const lzma_filter_info *filters) +{ + return armthumb_coder_init(next, allocator, filters, false); +} |