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- strip 399424 off the bss by making decompress_uncompress buffers config buffers.

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Compile tested (too lazy to look for a small .Z on the net).
$ size busybox.old busybox
   text    data     bss     dec     hex filename
 859555   10232  645732 1515519  171fff busybox.old
 859683   10232  246308 1116223  11083f busybox
$ make bloatcheck
function                                             old     new   delta
uncompress                                          1036    1160    +124
inbuf                                               2116       4   -2112
outbuf                                              4100       4   -4096
htab                                              131072       - -131072
codetab                                           262144       - -262144
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 1/2 up/down: 124/-399424)   Total: -399300 bytes
This commit is contained in:
Bernhard Reutner-Fischer 2006-09-06 15:28:32 +00:00
parent e614eaf40d
commit 5d725462d4
1 changed files with 10 additions and 12 deletions
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22
archival/libunarchive/decompress_uncompress.c
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@ -70,22 +70,12 @@ static int block_mode = BLOCK_MODE;
/* user settable max # bits/code */
static int maxbits = BITS;
/* Input buffer */
static unsigned char inbuf[IBUFSIZ + 64];
/* Output buffer */
static unsigned char outbuf[OBUFSIZ + 2048];
static unsigned char htab[HSIZE];
static unsigned short codetab[HSIZE];
#define htabof(i) htab[i]
#define codetabof(i) codetab[i]
#define tab_prefixof(i) codetabof(i)
#define tab_suffixof(i) ((unsigned char *)(htab))[i]
#define de_stack ((unsigned char *)&(htab[HSIZE-1]))
#define clear_htab() memset(htab, -1, sizeof(htab))
#define clear_htab() memset(htab, -1, HSIZE)
#define clear_tab_prefixof() memset(codetab, 0, 256);
@ -113,6 +103,12 @@ int uncompress(int fd_in, int fd_out)
long int maxmaxcode;
int n_bits;
int rsize = 0;
RESERVE_CONFIG_UBUFFER(inbuf, IBUFSIZ + 64);
RESERVE_CONFIG_UBUFFER(outbuf, OBUFSIZ + 2048);
unsigned char htab[HSIZE];
unsigned short codetab[HSIZE];
memset(inbuf, 0, IBUFSIZ + 64);
memset(outbuf, 0, OBUFSIZ + 2048);
insize = 0;
@ -160,7 +156,7 @@ int uncompress(int fd_in, int fd_out)
posbits = 0;
}
if (insize < (int) sizeof(inbuf) - IBUFSIZ) {
if (insize < (int) (IBUFSIZ + 64) - IBUFSIZ) {
rsize = safe_read(fd_in, inbuf + insize, IBUFSIZ);
insize += rsize;
}
@ -286,5 +282,7 @@ int uncompress(int fd_in, int fd_out)
write(fd_out, outbuf, outpos);
}
RELEASE_CONFIG_BUFFER(inbuf);
RELEASE_CONFIG_BUFFER(outbuf);
return 0;
}