From: Denys Vlasenko Date: Fri, 1 Mar 2013 13:37:58 +0000 (+0100) Subject: decompress_unlzma: make "fast" version a bit smaller X-Git-Tag: 1_22_0~252 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c09fd27c0a1bc45b3bca4347f3ef7713c3898656;p=oweals%2Fbusybox.git decompress_unlzma: make "fast" version a bit smaller It is not slower. In fact it seems a tiny bit faster too. text data bss dec hex filename 2827 0 0 2827 b0b decompress_unlzma.o 2797 0 0 2797 aed decompress_unlzma.o Signed-off-by: Denys Vlasenko --- diff --git a/archival/libarchive/decompress_unlzma.c b/archival/libarchive/decompress_unlzma.c index cfde8ea56..dd08e77f3 100644 --- a/archival/libarchive/decompress_unlzma.c +++ b/archival/libarchive/decompress_unlzma.c @@ -45,16 +45,16 @@ typedef struct { #define RC_MODEL_TOTAL_BITS 11 -/* Called twice: once at startup (LZMA_FAST only) and once in rc_normalize() */ -static size_inline void rc_read(rc_t *rc) +/* Called once in rc_do_normalize() */ +static void rc_read(rc_t *rc) { int buffer_size = safe_read(rc->fd, RC_BUFFER, RC_BUFFER_SIZE); //TODO: return -1 instead //This will make unlzma delete broken unpacked file on unpack errors if (buffer_size <= 0) bb_error_msg_and_die("unexpected EOF"); - rc->ptr = RC_BUFFER; rc->buffer_end = RC_BUFFER + buffer_size; + rc->ptr = RC_BUFFER; } /* Called twice, but one callsite is in speed_inline'd rc_is_bit_1() */ @@ -78,15 +78,9 @@ static ALWAYS_INLINE rc_t* rc_init(int fd) /*, int buffer_size) */ /* rc->ptr = rc->buffer_end; */ for (i = 0; i < 5; i++) { -#if ENABLE_FEATURE_LZMA_FAST - if (rc->ptr >= rc->buffer_end) - rc_read(rc); - rc->code = (rc->code << 8) | *rc->ptr++; -#else rc_do_normalize(rc); -#endif } - rc->range = 0xFFFFFFFF; + rc->range = 0xffffffff; return rc; }