dali/bacnet_stack
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Added Append feature required by BACnet spec when File Offset is -1. Thank you Robert Bouwens!

Browse Source
This commit is contained in:
skarg
2012-02-21 23:58:35 +00:00
parent b05fbf196c
commit 0478d87d53
1 changed files with 14 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
bacnet-stack/demo/object/bacfile.c
+14 -5
View File
@@ -460,16 +460,25 @@ bool bacfile_write_stream_data(
pFilename = bacfile_name(data->object_instance);
if (pFilename) {
found = true;
/* open the file as a clean slate when starting at 0 */
if (data->type.stream.fileStartPosition == 0)
if (data->type.stream.fileStartPosition == 0) {
/* open the file as a clean slate when starting at 0 */
pFile = fopen(pFilename, "wb");
else
} else if (data->type.stream.fileStartPosition == -1) {
/* If 'File Start Position' parameter has the special
value -1, then the write operation shall be treated
as an append to the current end of file. */
pFile = fopen(pFilename, "ab+");
} else {
/* open for update */
pFile = fopen(pFilename, "rb+");
}
if (pFile) {
(void) fseek(pFile, data->type.stream.fileStartPosition, SEEK_SET);
if (data->type.stream.fileStartPosition != -1) {
(void) fseek(pFile, data->type.stream.fileStartPosition, SEEK_SET);
}
if (fwrite(octetstring_value(&data->fileData),
octetstring_length(&data->fileData), 1, pFile) != 1) {
/* do something if it fails? */
}
fclose(pFile);
}