1 files changed, 68 insertions, 0 deletions
diff --git a/libbb/get_line_from_file.c b/libbb/get_line_from_file.c
new file mode 100644
index 0000000..3f2c609
--- /dev/null
+++ b/libbb/get_line_from_file.c
@@ -0,0 +1,68 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2005, 2006 Rob Landley <rob@landley.net>
+ * Copyright (C) 2004 Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2001 Matt Krai
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+/* This function reads an entire line from a text file, up to a newline 
+ * or NUL byte, inclusive.  It returns a malloc'ed char * which must be
+ * stored and free'ed  by the caller.  If end is null '\n' isn't considered
+ * end of line.  If end isn't null, length of the chunk read is stored in it. */
+
+char *bb_get_chunk_from_file(FILE * file, int *end)
+{
+	int ch;
+	int idx = 0;
+	char *linebuf = NULL;
+	int linebufsz = 0;
+
+	while ((ch = getc(file)) != EOF) {
+		/* grow the line buffer as necessary */
+		if (idx >= linebufsz) {
+			linebuf = xrealloc(linebuf, linebufsz += 80);
+		}
+		linebuf[idx++] = (char) ch;
+		if (!ch || (end && ch == '\n'))
+			break;
+	}
+	if (end)
+		*end = idx;
+	if (linebuf) {
+		// huh, does fgets discard prior data on error like this?
+		// I don't think so....
+		//if (ferror(file)) {
+		//	free(linebuf);
+		//	return NULL;
+		//}
+		linebuf = xrealloc(linebuf, idx+1);
+		linebuf[idx] = '\0';
+	}
+	return linebuf;
+}
+
+/* Get line, including trailing \n if any */
+char *xmalloc_fgets(FILE * file)
+{
+	int i;
+
+	return bb_get_chunk_from_file(file, &i);
+}
+
+/* Get line.  Remove trailing \n */
+char *xmalloc_getline(FILE * file)
+{
+	int i;
+	char *c = bb_get_chunk_from_file(file, &i);
+
+	if (i && c[--i] == '\n')
+		c[i] = 0;
+
+	return c;
+}