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extracted spd_append_range from sdp_traversal_filter_attributes

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matthias.ringwald 2011-08-07 09:28:57 +00:00
parent 8020a108cf
commit 62edfb0414
1 changed files with 25 additions and 23 deletions
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48
src/sdp_util.c
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@ -346,6 +346,22 @@ struct sdp_context_filter_attributes {
int complete;
};
// copy data with given start offset and max bytes, returns OK if all data has been copied
static int spd_append_range(struct sdp_context_filter_attributes* context, uint16_t len, uint8_t *data){
int ok = 1;
uint16_t remainder_len = len - context->startOffset;
if (context->maxBytes < remainder_len){
remainder_len = context->maxBytes;
ok = 0;
}
memcpy(context->buffer, &data[context->startOffset], remainder_len);
context->usedBytes += remainder_len;
context->buffer += remainder_len;
context->maxBytes -= remainder_len;
context->startOffset = 0;
return ok;
}
static int sdp_traversal_filter_attributes(uint16_t attributeID, uint8_t * attributeValue, de_type_t type, de_size_t size, void *my_context){
struct sdp_context_filter_attributes * context = (struct sdp_context_filter_attributes *) my_context;
@ -360,19 +376,12 @@ static int sdp_traversal_filter_attributes(uint16_t attributeID, uint8_t * attri
uint8_t idBuffer[3];
de_store_descriptor(idBuffer, DE_INT, DE_SIZE_16);
net_store_16(idBuffer,1,attributeID);
int i;
for (i=0; i<3; i++){
if (!context->maxBytes) {
context->complete = 0;
return 1;
}
if (i < context->startOffset) continue;
*(context->buffer) = idBuffer[i];
context->usedBytes++;
context->maxBytes--;
context->buffer++;
int ok = spd_append_range(context, 3, idBuffer);
if (!ok) {
context->complete = 0;
return 1;
}
context->startOffset = 0;
}
// handle Attribute Value
@ -382,19 +391,12 @@ static int sdp_traversal_filter_attributes(uint16_t attributeID, uint8_t * attri
return 0;
}
int done = 0;
uint16_t attribute_remainder_len = attribute_len - context->startOffset;
if (context->maxBytes < attribute_remainder_len){
attribute_remainder_len = context->maxBytes;
int ok = spd_append_range(context, attribute_len, attributeValue);
if (!ok) {
context->complete = 0;
done = 1;
return 1;
}
memcpy(context->buffer, &attributeValue[context->startOffset], attribute_remainder_len);
context->startOffset = 0;
context->usedBytes += attribute_remainder_len;
context->buffer += attribute_remainder_len;
context->maxBytes -= attribute_remainder_len;
return done;
return 0;
}
int sdp_filter_attributes_in_attributeIDList(uint8_t *record, uint8_t *attributeIDList, uint16_t startOffset, uint16_t maxBytes, uint16_t *usedBytes, uint8_t *buffer){