From 40d0a04ab7a392b2db057edf856348616bf8a1b1 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michal=20Mal=C3=BD?= <madcatxster@devoid-pointer.net>
Date: Mon, 4 Apr 2016 15:43:12 +0200
Subject: [PATCH] Handle strings of zero length correctly for old ChemStation
 file format

---
 libhpcs.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libhpcs.c b/libhpcs.c
index a3ee768..ab435b9 100644
--- a/libhpcs.c
+++ b/libhpcs.c
@@ -1095,6 +1095,16 @@ static enum HPCS_ParseCode __read_string_at_offset_v1(FILE* datafile, const HPCS
 
 	PR_DEBUGF("String length to read: %lu\n", str_length);
 
+	if (str_length == 0) {
+		*result = malloc(sizeof(char));
+
+		if (*result == NULL)
+			return PARSE_E_NO_MEM;
+
+		(*result)[0] = '\0';
+		return PARSE_OK;
+	}
+
 	/* Allocate read buffer */
 	string = calloc(str_length + 1, SMALL_SEGMENT_SIZE);
 	if (string == NULL)
-- 
2.43.5