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authorGravatar Rob Landley <rob@landley.net>2006-02-24 02:30:39 +0000
committerGravatar Rob Landley <rob@landley.net>2006-02-24 02:30:39 +0000
commit2b26fd5570ebd6efb395aac4773051a5f3ed4dcd (patch)
tree432c38fd4819faa22fb61c5f5a7114774a97493b /libbb
parent5c22c11de2dacac3c024a70ae01ee7afb64dddb8 (diff)
downloadbusybox-2b26fd5570ebd6efb395aac4773051a5f3ed4dcd.tar.gz
busybox-2b26fd5570ebd6efb395aac4773051a5f3ed4dcd.tar.bz2
A few changes falling out from the effort to make sed handle embedded NUL bytes.
Checking in to reduce the diff between my tree and svn...
Diffstat (limited to 'libbb')
-rw-r--r--libbb/get_line_from_file.c66
1 files changed, 20 insertions, 46 deletions
diff --git a/libbb/get_line_from_file.c b/libbb/get_line_from_file.c
index a27edc3bd..5ad497ffa 100644
--- a/libbb/get_line_from_file.c
+++ b/libbb/get_line_from_file.c
@@ -2,22 +2,11 @@
/*
* Utility routines.
*
- * Copyright (C) many different people.
- * If you wrote this, please acknowledge your work.
+ * Copyright (C) 2005, 2006 Rob Landley <rob@landley.net>
+ * Copyright (C) 2004 Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2001 Matt Krai
*
- * 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
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <stdio.h>
@@ -25,14 +14,12 @@
#include "libbb.h"
/* get_line_from_file() - This function reads an entire line from a text file,
- * up to a newline. It returns a malloc'ed char * which must be stored and
- * free'ed by the caller. If 'c' is nonzero, the trailing '\n' (if any)
- * is removed. In event of a read error or EOF, NULL is returned. */
+ * up to a newline or NUL byte. It returns a malloc'ed char * which must be
+ * stored and free'ed by the caller. If end is null '\n' isn't considered
+ * and of line. If end isn't null, length of the chunk read is stored in it. */
-static char *private_get_line_from_file(FILE *file, int c)
+char *bb_get_chunk_from_file(FILE *file, int *end)
{
-#define GROWBY (80) /* how large we will grow strings by */
-
int ch;
int idx = 0;
char *linebuf = NULL;
@@ -41,17 +28,12 @@ static char *private_get_line_from_file(FILE *file, int c)
while ((ch = getc(file)) != EOF) {
/* grow the line buffer as necessary */
if (idx > linebufsz - 2) {
- linebuf = xrealloc(linebuf, linebufsz += GROWBY);
+ linebuf = xrealloc(linebuf, linebufsz += 80);
}
linebuf[idx++] = (char)ch;
- if (!ch) return linebuf;
- if (c<2 && ch == '\n') {
- if (c) {
- --idx;
- }
- break;
- }
+ if (!ch || (end && ch == '\n')) break;
}
+ if (end) *end = idx;
if (linebuf) {
if (ferror(file)) {
free(linebuf);
@@ -62,27 +44,19 @@ static char *private_get_line_from_file(FILE *file, int c)
return linebuf;
}
+/* Get line, including trailing /n if any */
extern char *bb_get_line_from_file(FILE *file)
{
- return private_get_line_from_file(file, 0);
+ int i;
+ return bb_get_chunk_from_file(file, &i);
}
+/* Get line. Remove trailing /n */
extern char *bb_get_chomped_line_from_file(FILE *file)
{
- return private_get_line_from_file(file, 1);
-}
-
-extern char *bb_get_chunk_from_file(FILE *file)
-{
- return private_get_line_from_file(file, 2);
+ int i;
+ char *c=bb_get_chunk_from_file(file, &i);
+ if(i) c[--i]=0;
+
+ return c;
}
-
-
-/* END CODE */
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/