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

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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
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bacnet-stack/demo/object/bacfile.c
+14 -5
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@@ -460,16 +460,25 @@ bool bacfile_write_stream_data(
pFilename = bacfile_name(data->object_instance); pFilename = bacfile_name(data->object_instance);
if (pFilename) { if (pFilename) {
found = true; 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"); 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+"); pFile = fopen(pFilename, "rb+");
}
if (pFile) { 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), if (fwrite(octetstring_value(&data->fileData),
octetstring_length(&data->fileData), 1, pFile) != 1) { octetstring_length(&data->fileData), 1, pFile) != 1) {
/* do something if it fails? */
} }
fclose(pFile); fclose(pFile);
} }