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decompress_unlzma: make "fast" version a bit smaller

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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 <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2013-03-01 14:37:58 +01:00
parent 2fe5fed2df
commit c09fd27c0a
1 changed files with 4 additions and 10 deletions
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14
archival/libarchive/decompress_unlzma.c
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@ -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;
}