1 files changed, 106 insertions, 0 deletions
diff --git a/src/compat/getline.c b/src/compat/getline.c
new file mode 100644
index 0000000..a3e6047
--- /dev/null
+++ b/src/compat/getline.c
@@ -0,0 +1,106 @@
+/* -*- mode: c; c-file-style: "openbsd" -*- */
+/*
+ * Copyright (c) 2009 The NetBSD Foundation, Inc.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Roy Marples.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* Several modifications to make the code more portable (and less robust and far less
+ * efficient) */
+
+#include <stdio.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "compat.h"
+
+#define MINBUF 128
+
+static ssize_t
+___getdelim(char **buf, size_t *buflen, int sep, FILE *fp)
+{
+	int p;
+	size_t len = 0, newlen;
+	char *newb;
+
+	if (buf == NULL || buflen == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	/* If buf is NULL, we have to assume a size of zero */
+	if (*buf == NULL) *buflen = 0;
+
+	do {
+		p = fgetc(fp);
+		if (ferror(fp)) return -1;
+		if (p == EOF) break;
+
+		/* Ensure we can handle it */
+		if (len > SSIZE_MAX) {
+			errno = EOVERFLOW;
+			return -1;
+		}
+		newlen = len + 2; /* reserve space for NUL terminator */
+		if (newlen > *buflen) {
+			if (newlen < MINBUF) newlen = MINBUF;
+#define powerof2(x) ((((x)-1) & (x)) == 0)
+			if (!powerof2(newlen)) {
+				/* Grow the buffer to the next power of 2 */
+				newlen--;
+				newlen |= newlen >> 1;
+				newlen |= newlen >> 2;
+				newlen |= newlen >> 4;
+				newlen |= newlen >> 8;
+				newlen |= newlen >> 16;
+#if SIZE_MAX > 0xffffffffU
+				newlen |= newlen >> 32;
+#endif
+				newlen++;
+			}
+
+			newb = realloc(*buf, newlen);
+			if (newb == NULL) return -1;
+			*buf = newb;
+			*buflen = newlen;
+		}
+
+		(*buf)[len++] = p;
+	} while (p != sep);
+
+	/* POSIX demands we return -1 on EOF. */
+	if (len == 0) return -1;
+
+	if (*buf != NULL) (*buf)[len] = '\0';
+	return (ssize_t)len;
+}
+
+ssize_t
+getline(char **buf, size_t *buflen, FILE *fp)
+{
+	return ___getdelim(buf, buflen, '\n', fp);
+}