From 1f77a03fa02b0cdbaa878cd7015838638eedc4a8 Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周日, 24 4月 2016 22:11:15 +0800
Subject: [PATCH] Fix strndup of NULL, add auto length for SCPI_ErrorPushEx
---
libscpi/src/error.c | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/libscpi/src/error.c b/libscpi/src/error.c
index 0caa917..b2bedfc 100644
--- a/libscpi/src/error.c
+++ b/libscpi/src/error.c
@@ -40,6 +40,7 @@
#include "scpi/ieee488.h"
#include "scpi/error.h"
#include "fifo_private.h"
+#include "scpi/constants.h"
#if USE_DEVICE_DEPENDENT_ERROR_INFORMATION
#define SCPI_ERROR_SETVAL(e, c, i) do { (e)->error_code = (c); (e)->device_dependent_info = (i); } while(0)
@@ -129,7 +130,8 @@
static scpi_bool_t SCPI_ErrorAddInternal(scpi_t * context, int16_t err, char * info, size_t info_len) {
scpi_error_t error_value;
- SCPI_ERROR_SETVAL(&error_value, err, SCPIDEFINE_strndup(&context->error_info_heap, info, info_len));
+ char * info_ptr = info ? SCPIDEFINE_strndup(&context->error_info_heap, info, info_len) : NULL;
+ SCPI_ERROR_SETVAL(&error_value, err, info_ptr);
if (!fifo_add(&context->error_queue, &error_value)) {
SCPIDEFINE_free(&context->error_info_heap, error_value.device_dependent_info, true);
fifo_remove_last(&context->error_queue, &error_value);
@@ -163,11 +165,17 @@
/**
* Push error to queue
- * @param context - scpi context
+ * @param context
* @param err - error number
+ * @param info - additional text information or NULL for no text
+ * @param info_len - length of text or 0 for automatic length
*/
void SCPI_ErrorPushEx(scpi_t * context, int16_t err, char * info, size_t info_len) {
int i;
+ /* automatic calculation of length */
+ if (info && info_len == 0) {
+ info_len = SCPIDEFINE_strnlen(info, SCPI_STD_ERROR_DESC_MAX_STRING_LENGTH);
+ }
scpi_bool_t queue_overflow = !SCPI_ErrorAddInternal(context, err, info, info_len);
for (i = 0; i < ERROR_DEFS_N; i++) {
--
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