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157 lines
3.2 KiB
C
157 lines
3.2 KiB
C
//
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// PDF stream functions for pdfio.
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//
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// Copyright © 2021 by Michael R Sweet.
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//
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// Licensed under Apache License v2.0. See the file "LICENSE" for more
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// information.
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//
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//
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// Include necessary headers...
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//
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#include "pdfio-private.h"
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//
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// 'pdfioStreamClose()' - Close a (data) stream in a PDF file.
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//
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bool // O - `true` on success, `false` on failure
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pdfioStreamClose(pdfio_stream_t *st) // I - Stream
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{
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// TODO: Implement me
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(void)st;
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return (false);
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}
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//
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// '_pdfioStreamDelete()' - Free all memory used by a stream.
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//
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void
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_pdfioStreamDelete(pdfio_stream_t *st) // I - Stream
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{
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if (st->filter == PDFIO_FILTER_FLATE)
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{
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// Free memory used for flate compression/decompression...
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if (st->pdf->mode == _PDFIO_MODE_READ)
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inflateEnd(&st->flate);
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else // mode == _PDFIO_MODE_WRITE
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deflateEnd(&st->flate);
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}
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free(st);
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}
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//
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// 'pdfioStreamGetToken()' - Read a single PDF token from a stream.
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//
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bool // O - `true` on success, `false` on EOF
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pdfioStreamGetToken(
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pdfio_stream_t *st, // I - Stream
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char *buffer, // I - String buffer
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size_t bufsize) // I - Size of string buffer
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{
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return (_pdfioTokenRead(buffer, bufsize, (_pdfio_token_cb_t)pdfioStreamPeek, (_pdfio_token_cb_t)pdfioStreamRead, st));
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}
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//
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// 'pdfioStreamPeek()' - Peek at data in a stream.
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//
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ssize_t // O - Bytes returned or `-1` on error
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pdfioStreamPeek(pdfio_stream_t *st, // I - Stream
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void *buffer, // I - Buffer
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size_t bytes) // I - Size of buffer
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{
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// TODO: Implement me
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(void)st;
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(void)buffer;
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(void)bytes;
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return (-1);
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}
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//
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// 'pdfioStreamPrintf()' - Write a formatted string to a stream.
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//
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bool // O - `true` on success, `false` on failure
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pdfioStreamPrintf(
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pdfio_stream_t *st, // I - Stream
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const char *format, // I - `printf`-style format string
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...) // I - Additional arguments as needed
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{
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char buffer[8192]; // String buffer
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va_list ap; // Argument pointer
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// Format the string...
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va_start(ap, format);
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vsnprintf(buffer, sizeof(buffer), format, ap);
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va_end(ap);
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// Write the string...
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return (pdfioStreamWrite(st, buffer, strlen(buffer)));
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}
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//
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// 'pdfioStreamPuts()' - Write a literal string to a stream.
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//
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bool // O - `true` on success, `false` on failure
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pdfioStreamPuts(pdfio_stream_t *st, // I - Stream
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const char *s) // I - Literal string
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{
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if (!st || !s)
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return (false);
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else
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return (pdfioStreamWrite(st, s, strlen(s)));
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}
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//
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// 'pdfioStreamRead()' - Read data from a stream.
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//
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ssize_t // O - Number of bytes read or `-1` on error
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pdfioStreamRead(
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pdfio_stream_t *st, // I - Stream
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void *buffer, // I - Buffer
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size_t bytes) // I - Bytes to read
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{
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// TODO: Implement me
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(void)st;
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(void)buffer;
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(void)bytes;
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return (-1);
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}
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//
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// 'pdfioStreamWrite()' - Write data to a stream.
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//
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bool // O - `true` on success or `false` on failure
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pdfioStreamWrite(
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pdfio_stream_t *st, // I - Stream
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const void *buffer, // I - Data to write
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size_t bytes) // I - Number of bytes to write
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{
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// TODO: Implement me
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(void)st;
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(void)buffer;
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(void)bytes;
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return (false);
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}
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