[BusyBox-cvs] busybox.stable/libbb get_line_from_file.c, 1.2, 1.3 libbb.h, 1.74, 1.75

Erik Andersen andersen at busybox.net
Tue Dec 23 21:36:58 UTC 2003


Update of /var/cvs/busybox.stable/libbb
In directory nail:/tmp/cvs-serv7455/libbb

Modified Files:
	get_line_from_file.c libbb.h 
Log Message:
remove duplication


Index: get_line_from_file.c
===================================================================
RCS file: /var/cvs/busybox.stable/libbb/get_line_from_file.c,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -d -r1.2 -r1.3
--- get_line_from_file.c	6 Dec 2001 07:50:44 -0000	1.2
+++ get_line_from_file.c	23 Dec 2003 21:36:55 -0000	1.3
@@ -2,8 +2,8 @@
 /*
  * Utility routines.
  *
- * Copyright (C) many different people.  If you wrote this, please
- * acknowledge your work.
+ * Copyright (C) many different people.  
+ * If you wrote this, please acknowledge your work.
  *
  * 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
@@ -21,39 +21,54 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include "libbb.h"
 
-
-
-/* get_line_from_file() - This function reads an entire line from a text file
+/* 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. */
-extern char *get_line_from_file(FILE *file)
+ * 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. */
+
+static char *private_get_line_from_file(FILE *file, int c)
 {
-	static const int GROWBY = 80; /* how large we will grow strings by */
+#define GROWBY (80)		/* how large we will grow strings by */
 
 	int ch;
 	int idx = 0;
 	char *linebuf = NULL;
 	int linebufsz = 0;
 
-	while (1) {
-		ch = fgetc(file);
-		if (ch == EOF)
-			break;
+	while ((ch = getc(file)) != EOF) {
 		/* grow the line buffer as necessary */
-		while (idx > linebufsz-2)
+		if (idx > linebufsz - 2) {
 			linebuf = xrealloc(linebuf, linebufsz += GROWBY);
+		}
 		linebuf[idx++] = (char)ch;
-		if (ch == '\n' || ch == '\0')
+		if (ch == '\n' || ch == '\0') {
+			if (c) {
+				--idx;
+			}
 			break;
+		}
 	}
+	if (linebuf) {
+		if (ferror(file)) {
+			free(linebuf);
+			return NULL;
+		}
+		linebuf[idx] = 0;
+	}
+	return linebuf;
+}
 
-	if (idx == 0)
-		return NULL;
+extern char *get_line_from_file(FILE *file)
+{
+	return private_get_line_from_file(file, 0);
+}
 
-	linebuf[idx] = 0;
-	return linebuf;
+extern char *get_chomped_line_from_file(FILE *file)
+{
+	return private_get_line_from_file(file, 1);
 }
 
 

Index: libbb.h
===================================================================
RCS file: /var/cvs/busybox.stable/libbb/libbb.h,v
retrieving revision 1.74
retrieving revision 1.75
diff -u -d -r1.74 -r1.75
--- libbb.h	18 Sep 2002 19:21:07 -0000	1.74
+++ libbb.h	23 Dec 2003 21:36:55 -0000	1.75
@@ -119,6 +119,7 @@
 extern long* find_pid_by_name( char* pidName);
 extern char *find_real_root_device_name(const char* name);
 extern char *get_line_from_file(FILE *file);
+extern char *get_chomped_line_from_file(FILE *file);
 extern void print_file(FILE *file);
 extern int copyfd(int fd1, int fd2);
 extern int print_file_by_name(char *filename);




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