+++ /dev/null
-/* $Id: pushback.c,v 1.3 2002/01/03 04:57:56 rodrigc Exp $
-
- $Log: pushback.c,v $
- Revision 1.3 2002/01/03 04:57:56 rodrigc
- 2001-01-02 Craig Rodrigues <rodrigc@gcc.gnu.org>
-
- PR bootstrap/5117
- * configure.in (AC_CHECK_HEADERS): Check for stdlib.h.
- * Makefile.am: Move grepjar to bin_PROGRAMS.
- * config.h.in: Regenerated.
- * Makefile.in: Regenerated.
- * aclocal.m4: Regenerated.
- * jargrep.c: Eliminate some signed/unsigned and default
- uninitialized warnings. Use HAVE_STDLIB_H instead of
- STDC_HEADERS macro.
- * jartool.c: Likewise.
- * compress.c: Likewise.
-
- Revision 1.2 2000/12/14 18:45:35 ghazi
- Warning fixes:
-
- * compress.c: Include stdlib.h and compress.h.
- (rcsid): Delete.
- (report_str_error): Make static.
- (ez_inflate_str): Delete unused variable. Add parens in if-stmt.
- (hrd_inflate_str): Likewise.
-
- * compress.h (init_compression, end_compression, init_inflation,
- end_inflation): Prototype void arguments.
-
- * dostime.c (rcsid): Delete.
-
- * jargrep.c: Include ctype.h, stdlib.h, zlib.h and compress.h.
- Make functions static. Cast ctype function argument to `unsigned
- char'. Add parens in if-stmts. Constify.
- (Usage): Change into a macro.
- (jargrep): Remove unused parameter.
-
- * jartool.c: Constify. Add parens in if-stmts. Align
- signed/unsigned char pointers in functions calls using casts.
- (rcsid): Delete.
- (list_jar): Fix printf format specifier.
- (usage): Chop long string into bits. Reformat.
-
- * pushback.c (rcsid): Delete.
-
- Revision 1.1 2000/12/09 03:08:23 apbianco
- 2000-12-08 Alexandre Petit-Bianco <apbianco@cygnus.com>
-
- * fastjar: Imported.
-
- Revision 1.2 2000/08/23 19:42:17 cory
- Added support for more Unix platforms. The following code has been hacked
- to work on AIX, Solaris, True 64, and HP-UX.
- Added bigendian check. Probably works on most big and little endian platforms
- now.
-
- Revision 1.1.1.1 1999/12/06 03:09:13 toast
- initial checkin..
-
-
-
- Revision 1.1 1999/05/10 08:32:37 burnsbr
- Initial revision
-
-*/
-
-/*
- pushback.c - code for a pushback buffer to handle file I/O
- Copyright (C) 1999 Bryan Burns
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation; either version 2
- of the License, or (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include <unistd.h>
-#include <string.h>
-#include <stdio.h>
-
-#include "jartool.h"
-#include "pushback.h"
-
-void pb_init(pb_file *pbf, int fd){
- pbf->fd = fd;
- pbf->next = pbf->pb_buff;
- pbf->buff_amt = 0;
-}
-
-int pb_push(pb_file *pbf, void *buff, int amt){
- int in_amt;
- int wrap = 0;
-
-#ifdef DEBUG
- printf("%d bytes being pushed back to the buffer\n", amt);
-#endif
-
- /* determine how much we can take */
- if((int)(RDSZ - pbf->buff_amt) < amt)
- in_amt = RDSZ - pbf->buff_amt;
- else
- in_amt = amt;
-
- if(in_amt == 0)
- return 0;
-
- /* figure out if we need to wrap around, and if so, by how much */
- if(((pbf->pb_buff + RDSZ) - pbf->next) < in_amt)
- wrap = in_amt - ((pbf->pb_buff + RDSZ) - pbf->next);
-
- /* write everything up til the end of the buffer */
- memcpy(pbf->next, buff, (in_amt - wrap));
-
- /* finish writing what's wrapped around */
- memcpy(pbf->pb_buff, ((char *)buff + (in_amt - wrap)), wrap);
-
- /* update the buff_amt field */
- pbf->buff_amt += in_amt;
-
-#ifdef DEBUG
- printf("%d bytes we can't accept\n", (amt - in_amt));
-#endif
-
- return in_amt;
-}
-
-
-int pb_read(pb_file *pbf, void *buff, int amt){
- int out_amt = 0;
- int wrap = 0;
- void *bp = buff;
- int tmp;
-
-#ifdef DEBUG
- printf("%d bytes requested from us\n", amt);
-#endif
- while(out_amt < amt){
- /* if our push-back buffer contains some data */
- if(pbf->buff_amt > 0){
-
-#ifdef DEBUG
- printf("giving data from buffer\n");
-#endif
-
- /* calculate how much we can actually give the caller */
- if( (amt - out_amt) < (int)pbf->buff_amt )
- tmp = (amt - out_amt);
- else
- tmp = pbf->buff_amt;
-
- /* Determine if we're going to need to wrap around the buffer */
- if(tmp > ((pbf->pb_buff + RDSZ) - pbf->next))
- wrap = tmp - ((pbf->pb_buff + RDSZ) - pbf->next);
-
- memcpy(bp, pbf->next, (tmp - wrap));
- bp = &(((char *)bp)[tmp - wrap]);
-
- /* If we need to wrap, read from the start of the buffer */
- if(wrap > 0){
- memcpy(bp, pbf->pb_buff, wrap);
- bp = &(((char *)bp)[wrap]);
- }
-
- /* update the buff_amt field */
- pbf->buff_amt -= tmp;
- pbf->next += tmp;
-
-#ifdef DEBUG
- printf("%d bytes remaining in buffer\n", pbf->buff_amt);
-#endif
-
- /* if the buffer is empty, reset the next header to the front of the
- buffer so subsequent pushbacks/reads won't have to wrap */
- if(pbf->buff_amt == 0)
- pbf->next = pbf->pb_buff;
-
- out_amt += tmp;
-
- } else {
-#ifdef DEBUG
- printf("Reading from file..\n");
-#endif
-
- /* The pushback buffer was empty, so we just need to read from the file */
- tmp = read(pbf->fd, bp, (amt - out_amt));
- if(tmp == 0)
- break;
- else
- out_amt += tmp;
-
- bp = &(((char *)bp)[tmp]);
- }
- }
-
-#ifdef DEBUG
- printf("managed to read %d bytes\n", out_amt);
-#endif
- return out_amt;
-}
projects / msp430-gcc.git / blobdiff