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Add pdfioFileCreateOutput API (Issue #21)

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This commit is contained in:
Michael R Sweet
2021-09-27 07:41:50 -04:00
parent 9f1cadf78b
commit d6746c08a4
10 changed files with 503 additions and 257 deletions
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45
pdfio-common.c
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@@ -377,6 +377,11 @@ _pdfioFileSeek(pdfio_file_t *pdf, // I - PDF file
// No, reset the read buffer
pdf->bufptr = pdf->bufend = NULL;
}
else if (pdf->output_cb)
{
_pdfioFileError(pdf, "Unable to seek within output stream.");
return (-1);
}
else
{
// Writing, make sure we write any buffered data...
@@ -530,25 +535,37 @@ write_buffer(pdfio_file_t *pdf, // I - PDF file
ssize_t wbytes; // Bytes written...
// Write to the file...
while (bytes > 0)
if (pdf->output_cb)
{
while ((wbytes = write(pdf->fd, bufptr, bytes)) < 0)
// Write to a stream...
if ((pdf->output_cb)(pdf->output_ctx, buffer, bytes) < 0)
{
// Stop if we have an error that shouldn't be retried...
if (errno != EINTR && errno != EAGAIN)
break;
}
if (wbytes < 0)
{
// Hard error...
_pdfioFileError(pdf, "Unable to write to file - %s", strerror(errno));
_pdfioFileError(pdf, "Unable to write to output callback.");
return (false);
}
}
else
{
// Write to the file...
while (bytes > 0)
{
while ((wbytes = write(pdf->fd, bufptr, bytes)) < 0)
{
// Stop if we have an error that shouldn't be retried...
if (errno != EINTR && errno != EAGAIN)
break;
}
bufptr += wbytes;
bytes -= (size_t)wbytes;
if (wbytes < 0)
{
// Hard error...
_pdfioFileError(pdf, "Unable to write to file - %s", strerror(errno));
return (false);
}
bufptr += wbytes;
bytes -= (size_t)wbytes;
}
}
return (true);