summaryrefslogtreecommitdiff
path: root/i/pc104/initrd/conf/busybox/libbb/get_line_from_file.c
diff options
context:
space:
mode:
Diffstat (limited to 'i/pc104/initrd/conf/busybox/libbb/get_line_from_file.c')
-rw-r--r--i/pc104/initrd/conf/busybox/libbb/get_line_from_file.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/libbb/get_line_from_file.c b/i/pc104/initrd/conf/busybox/libbb/get_line_from_file.c
new file mode 100644
index 0000000..2c9608e
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/libbb/get_line_from_file.c
@@ -0,0 +1,69 @@
+/* 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.
+ * Return NULL if EOF/error */
+
+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;
+}