/** \brief Use the contents of an operating system file as the input
* for an input stream.
*
* \param fileName Name of operating system file to read.
* \return
* - Pointer to new input stream context upon success
* - One of the ANTLR3_ERR_ defines on error.
*/
ANTLR3_API pANTLR3_INPUT_STREAM
antlr3AsciiFileStreamNew(pANTLR3_UINT8 fileName)
{
// Pointer to the input stream we are going to create
//
pANTLR3_INPUT_STREAM input;
ANTLR3_UINT32 status;
if (fileName == NULL)
{
return NULL;
}
// Allocate memory for the input stream structure
//
input = (pANTLR3_INPUT_STREAM)
ANTLR3_CALLOC(1, sizeof(ANTLR3_INPUT_STREAM));
if (input == NULL)
{
return NULL;
}
// Structure was allocated correctly, now we can read the file.
//
status = antlr3readAscii(input, fileName);
// Call the common 8 bit ASCII input stream handler
// Initializer type thingy doobry function.
//
antlr3AsciiSetupStream(input, ANTLR3_CHARSTREAM);
// Now we can set up the file name
//
input->istream->streamName = input->strFactory->newStr(input->strFactory, fileName);
input->fileName = input->istream->streamName;
if (status != ANTLR3_SUCCESS)
{
input->close(input);
return NULL;
}
return input;
}
/** \brief Use the contents of an operating system file as the input
* for an input stream.
*
* \param fileName Name of operating system file to read.
* \return
* - Pointer to new input stream context upon success
* - One of the ANTLR3_ERR_ defines on error.
*/
ANTLR3_API pANTLR3_INPUT_STREAM
antlr3AsciiFileStreamNew(pANTLR3_UINT8 fileName)
{
/* Pointer to the input stream we are going to create
*/
pANTLR3_INPUT_STREAM input;
ANTLR3_UINT64 status;
/* Allocate memory for the input stream structure
*/
input = (pANTLR3_INPUT_STREAM)
ANTLR3_MALLOC(sizeof(ANTLR3_INPUT_STREAM));
if (input == NULL)
{
return (pANTLR3_INPUT_STREAM) ANTLR3_ERR_NOMEM;
}
input->fileName = ANTLR3_STRDUP(fileName);
/* Structure was allocated correctly, now we can read the file.
*/
status = antlr3readAscii(input);
if (status != ANTLR3_SUCCESS)
{
ANTLR3_FREE(input->fileName);
ANTLR3_FREE(input);
return ANTLR3_FUNC_PTR(status);
}
/* Call the common 8 bit ASCII input stream handler
* intializer type thingy doobry function.
*/
antlr3AsciiSetupStream(input, ANTLR3_CHARSTREAM);
return input;
}
