wsstream.h File Reference

Go to the source code of this file.

Data Structures
struct	WsStreamRec

Macros
#define	WS_STREAM_BUFFER_SIZE   1024

Typedefs
typedef size_t(*	WsStreamIOProc) (void *context, WsUInt32 *buf, size_t buflen)
typedef WsBool(*	WsStreamFlushProc) (void *context)
typedef void(*	WsStreamCloseProc) (void *context)
typedef struct WsStreamRec	WsStream

Functions
WsBool	ws_stream_getc (WsStream *stream, WsUInt32 *ch_return)
void	ws_stream_ungetc (WsStream *stream, WsUInt32 ch)
WsBool	ws_stream_flush (WsStream *stream)
void	ws_stream_close (WsStream *stream)
WsStream *	ws_stream_new (void *context, WsStreamIOProc io, WsStreamFlushProc flush, WsStreamCloseProc close)
WsStream *	ws_stream_new_file (FILE *fp, WsBool output, WsBool close)
WsStream *	ws_stream_new_data_input (const unsigned char *data, size_t data_len)

Macro Definition Documentation

WS_STREAM_BUFFER_SIZE

#define WS_STREAM_BUFFER_SIZE   1024

Definition at line 78 of file wsstream.h.

Referenced by file_output(), and ws_stream_getc().

Typedef Documentation

WsStream

typedef struct WsStreamRec WsStream

Definition at line 118 of file wsstream.h.

WsStreamCloseProc

typedef void(* WsStreamCloseProc) (void *context)

Definition at line 95 of file wsstream.h.

WsStreamFlushProc

typedef WsBool(* WsStreamFlushProc) (void *context)

Definition at line 92 of file wsstream.h.

WsStreamIOProc

typedef size_t(* WsStreamIOProc) (void *context, WsUInt32 *buf, size_t buflen)

Definition at line 87 of file wsstream.h.

Function Documentation

ws_stream_close()

void ws_stream_close

(

WsStream *

stream

)

Definition at line 117 of file wsstream.c.

References WsStreamRec::close, WsStreamRec::context, and ws_free().

Referenced by ws_compile_data(), and ws_compile_file().

{
    if (stream->close)
        (*stream->close)(stream->context);

    ws_free(stream);
}

ws_stream_flush()

WsBool ws_stream_flush

(

WsStream *

stream

)

Definition at line 108 of file wsstream.c.

References WsStreamRec::context, WsStreamRec::flush, and WS_TRUE.

{
    if (stream->flush)
        return (*stream->flush)(stream->context);

    return WS_TRUE;
}

ws_stream_getc()

WsBool ws_stream_getc	(	WsStream *	stream,
		WsUInt32 *	ch_return
	)

Definition at line 74 of file wsstream.c.

References WsStreamRec::buffer, WsStreamRec::buffer_pos, WsStreamRec::context, WsStreamRec::data_in_buffer, WsStreamRec::io, WsStreamRec::ungetch, WsStreamRec::ungetch_valid, WS_FALSE, WS_STREAM_BUFFER_SIZE, and WS_TRUE.

Referenced by read_float_from_exp(), read_float_from_point(), and ws_yy_lex().

{
    if (stream->ungetch_valid) {
        *ch_return = stream->ungetch;
        stream->ungetch_valid = WS_FALSE;

        return WS_TRUE;
    }

    if (stream->buffer_pos >= stream->data_in_buffer) {
        /* Read more data to the buffer. */
        stream->buffer_pos = 0;
        stream->data_in_buffer = (*stream->io)(stream->context,
                                               stream->buffer,
                                               WS_STREAM_BUFFER_SIZE);
        if (stream->data_in_buffer == 0)
            /* EOF reached. */
            return WS_FALSE;
    }

    /* Return the next character. */
    *ch_return = stream->buffer[stream->buffer_pos++];

    return WS_TRUE;
}

ws_stream_new()

WsStream* ws_stream_new	(	void *	context,
		WsStreamIOProc	io,
		WsStreamFlushProc	flush,
		WsStreamCloseProc	close
	)

Definition at line 126 of file wsstream.c.

References WsStreamRec::close, WsStreamRec::context, WsStreamRec::flush, WsStreamRec::io, and ws_calloc().

Referenced by ws_stream_new_data_input(), and ws_stream_new_file().

{
    WsStream *stream = ws_calloc(1, sizeof(*stream));

    if (stream == NULL)
        return NULL;

    stream->io = io;
    stream->flush = flush;
    stream->close = close;
    stream->context = context;

    return stream;
}

ws_stream_new_data_input()

WsStream* ws_stream_new_data_input	(	const unsigned char *	data,
		size_t	data_len
	)

Definition at line 108 of file wsstream_data.c.

References WsStreamDataInputCtxRec::data, data_close(), data_input(), WsStreamDataInputCtxRec::data_len, ws_calloc(), and ws_stream_new().

Referenced by ws_compile_data().

{
    WsStreamDataInputCtx *ctx = ws_calloc(1, sizeof(*ctx));
    WsStream *stream;

    if (ctx == NULL)
        return NULL;

    ctx->data = data;
    ctx->data_len = data_len;

    stream = ws_stream_new(ctx, data_input, NULL, data_close);

    if (stream == NULL)
        /* The stream creation failed.  Close the stream context. */
        data_close(ctx);

    return stream;
}

ws_stream_new_file()

WsStream* ws_stream_new_file	(	FILE *	fp,
		WsBool	output,
		WsBool	close
	)

Definition at line 206 of file wsstream_file.c.

References WsStreamFileCtxRec::close_fp, file_close(), file_flush(), file_input(), file_output(), WsStreamFileCtxRec::fp, ws_calloc(), and ws_stream_new().

Referenced by ws_compile_file().

{
    WsStreamFileCtx *ctx = ws_calloc(1, sizeof(*ctx));
    WsStream *stream;

    if (ctx == NULL)
        return NULL;

    ctx->fp = fp;
    ctx->close_fp = close;

    if (output)
        stream = ws_stream_new(ctx, file_output, file_flush, file_close);
    else
        stream = ws_stream_new(ctx, file_input, file_flush, file_close);

    if (stream == NULL)
        /* The stream creation failed.  Close the stream context. */
        file_close(ctx);

    return stream;
}

ws_stream_ungetc()

void ws_stream_ungetc	(	WsStream *	stream,
		WsUInt32	ch
	)

Definition at line 101 of file wsstream.c.

References WsStreamRec::ungetch, WsStreamRec::ungetch_valid, and WS_TRUE.

Referenced by read_float_from_exp(), read_float_from_point(), and ws_yy_lex().

{
    stream->ungetch = ch;
    stream->ungetch_valid = WS_TRUE;
}