From 3344d1a728d37f0fb3e82a6a945eee0c780eb734 Mon Sep 17 00:00:00 2001
From: Chernov Dmitriy <cd_work@mail.ru>
Date: 周三, 02 3月 2016 21:29:32 +0800
Subject: [PATCH] Fix potential memory leak. #73
---
libscpi/src/parser.c | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 104 insertions(+), 6 deletions(-)
diff --git a/libscpi/src/parser.c b/libscpi/src/parser.c
index 70187f3..00cba78 100644
--- a/libscpi/src/parser.c
+++ b/libscpi/src/parser.c
@@ -219,7 +219,11 @@
result &= processCommand(context);
cmd_prev = state->programHeader;
} else {
- SCPI_ErrorPush(context, SCPI_ERROR_UNDEFINED_HEADER);
+ /* test */
+ /* place undefined header with error */
+ data[r?(r-1):r]=0;
+ SCPI_ErrorPushEx(context, SCPI_ERROR_UNDEFINED_HEADER, data);
+ //SCPI_ErrorPush(context, SCPI_ERROR_UNDEFINED_HEADER);
result = FALSE;
}
}
@@ -246,9 +250,31 @@
* @param buffer
* @param interface
*/
-void SCPI_Init(scpi_t * context) {
+void SCPI_Init(scpi_t * context,
+ const scpi_command_t * commands,
+ scpi_interface_t * interface,
+ const scpi_unit_def_t * units,
+ const char * idn1, const char * idn2, const char * idn3, const char * idn4,
+ char * input_buffer, size_t input_buffer_length,
+ scpi_error_t * error_queue_data, int16_t error_queue_size,
+ char * error_info_heap, size_t error_info_heap_length) {
+ memset(context, 0, sizeof(*context));
+ context->cmdlist = commands;
+ context->interface = interface;
+ context->units = units;
+ context->idn[0] = idn1;
+ context->idn[1] = idn2;
+ context->idn[2] = idn3;
+ context->idn[3] = idn4;
+ context->buffer.data = input_buffer;
+ context->buffer.length = input_buffer_length;
context->buffer.position = 0;
- SCPI_ErrorInit(context);
+ context->error_info_heap.data = error_info_heap;
+ context->error_info_heap.wr = 0;
+ context->error_info_heap.size = error_info_heap_length;
+ context->error_info_heap.count = context->error_info_heap.size;
+ memset(context->error_info_heap.data,0,context->error_info_heap.size);
+ SCPI_ErrorInit(context, error_queue_data, error_queue_size);
}
/**
@@ -482,6 +508,80 @@
result += writeData(context, "\"", 1);
context->output_count++;
return result;
+}
+
+
+/**
+ * SCPI-99:21.8 Device-dependent error information.
+ * Write error information with the following syntax:
+ * <Error/event_number>,"<Error/event_description>[;<Device-dependent_info>]"
+ * The maximum string length of <Error/event_description> plus <Device-dependent_info>
+ * is SCPI_STD_ERROR_DESC_MAX_STRING_LENGTH (255) characters.
+ *
+ * @param context
+ * @param error
+ * @return
+ */
+size_t SCPI_ResultError(scpi_t * context, scpi_error_t * error) {
+ size_t result = 0;
+ size_t outputlimit = SCPI_STD_ERROR_DESC_MAX_STRING_LENGTH;
+ size_t step = 0;
+ const char * quote;
+
+ char * data[SCPIDEFINE_DESCRIPTION_MAX_PARTS];
+ size_t len[SCPIDEFINE_DESCRIPTION_MAX_PARTS];
+
+ data[0] = SCPI_ErrorTranslate(error->error_code);
+ len[0] = strlen(data[0]);
+
+#if USE_DEVICE_DEPENDENT_ERROR_INFORMATION
+ data[1] = error->device_dependent_info;
+#if USE_MEMORY_ALLOCATION_FREE
+ len[1] = error->device_dependent_info ? strlen(data[1]) : 0;
+#else
+ SCPIDEFINE_get_parts(&context->error_info_heap, data[1], &len[1], &data[2], &len[2]);
+#endif
+#endif
+
+ result += SCPI_ResultInt32(context, error->error_code);
+ result += writeDelimiter(context);
+ result += writeData(context, "\"", 1);
+
+ for(size_t i = 0; data[i] && outputlimit && (i < SCPIDEFINE_DESCRIPTION_MAX_PARTS); i++){
+ if(i==1){
+ result += writeSemicolon(context);
+ outputlimit -= 1;
+ }
+ if(len[i] > outputlimit) {
+ len[i] = outputlimit;
+ }
+
+ while ((quote = strnpbrk(data[i], len[i], "\""))) {
+ if((step = quote - data[i] + 1) >= outputlimit){
+ len[i] -= 1;
+ outputlimit -= 1;
+ break;
+ }
+ result += writeData(context, data[i], step);
+ result += writeData(context, "\"", 1);
+ len[i] -= step ;
+ outputlimit -= step + 1;
+ data[i] = quote + 1;
+ if(len[i] > outputlimit) {
+ len[i] = outputlimit;
+ }
+ }
+
+ result += writeData(context, data[i], len[i]);
+ outputlimit-=len[i];
+ }
+ result += writeData(context, "\"", 1);
+
+ #if USE_DEVICE_DEPENDENT_ERROR_INFORMATION
+ SCPIDEFINE_free(&context->error_info_heap, error->device_dependent_info, false);
+ #endif
+
+ return result;
}
/**
@@ -1455,6 +1555,7 @@
case 4:
case 8:
result += SCPI_ResultArbitraryBlockHeader(context, count * item_size);
+ break;
default:
SCPI_ErrorPush(context, SCPI_ERROR_SYSTEM_ERROR);
return 0;
@@ -1495,9 +1596,6 @@
size_t i;\
for (i = 0; i < count; i++) {\
result += func(context, array[i]);\
- }\
- if (count > 0) {\
- result += count - 1; /* add length of commas */\
}\
} else {\
result = parserResultArrayBinary(context, array, count, sizeof(*array), format);\
--
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