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Cleaner solution to the PrinterHost data send routine problem of embedded NULLs - use a special structure to hold the data string plus the length in bytes of the data.

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This commit is contained in:
Dean Camera 2009-07-20 03:07:27 +00:00
parent 5d8cdd9bea
commit 4c035b14f1
3 changed files with 20 additions and 9 deletions
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6
Demos/Host/Incomplete/PrinterHost/Lib/PrinterCommands.c
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@ -33,18 +33,18 @@
/** Sends the given data directly to the printer via the data endpoints, for the sending of print commands in printer
* languages accepted by the attached printer (e.g. PCL).
*
* \param[in] PrinterCommands Pointer to the input buffer containing the printer data to send
* \param[in] PrinterCommands Pointer to a structure containing the commands and length of the data to send
*
* \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
*/
uint8_t Printer_SendData(char* PrinterCommands, uint16_t DataLength)
uint8_t Printer_SendData(Printer_Data_t* PrinterCommands)
{
uint8_t ErrorCode;
Pipe_SelectPipe(PRINTER_DATA_OUT_PIPE);
Pipe_Unfreeze();
if ((ErrorCode = Pipe_Write_Stream_LE(PrinterCommands, DataLength)) != PIPE_RWSTREAM_NoError)
if ((ErrorCode = Pipe_Write_Stream_LE(PrinterCommands->Data, PrinterCommands->Length)) != PIPE_RWSTREAM_NoError)
return ErrorCode;
Pipe_ClearOUT();