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Backport reading improvements/bug fixes from master.

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Michael R Sweet
2025-04-24 12:19:11 -04:00
parent f9c07a0346
commit 8f706b9fe7
5 changed files with 175 additions and 100 deletions
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11
pdfio-common.c
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@@ -134,19 +134,20 @@ _pdfioFileGetChar(pdfio_file_t *pdf) // I - PDF file
bool // O - `true` on success, `false` on error
_pdfioFileGets(pdfio_file_t *pdf, // I - PDF file
char *buffer, // I - Line buffer
size_t bufsize) // I - Size of line buffer
size_t bufsize, // I - Size of line buffer
bool discard) // I - OK to discard excess line chars?
{
bool eol = false; // End of line?
char *bufptr = buffer, // Pointer into buffer
*bufend = buffer + bufsize - 1; // Pointer to end of buffer
PDFIO_DEBUG("_pdfioFileGets(pdf=%p, buffer=%p, bufsize=%lu) bufpos=%ld, buffer=%p, bufptr=%p, bufend=%p, offset=%lu\n", pdf, buffer, (unsigned long)bufsize, (long)pdf->bufpos, pdf->buffer, pdf->bufptr, pdf->bufend, (unsigned long)(pdf->bufpos + (pdf->bufptr - pdf->buffer)));
PDFIO_DEBUG("_pdfioFileGets(pdf=%p, buffer=%p, bufsize=%lu, discard=%s) bufpos=%ld, buffer=%p, bufptr=%p, bufend=%p, offset=%lu\n", pdf, buffer, (unsigned long)bufsize, discard ? "true" : "false", (long)pdf->bufpos, pdf->buffer, pdf->bufptr, pdf->bufend, (unsigned long)(pdf->bufpos + (pdf->bufptr - pdf->buffer)));
while (!eol)
{
// If there are characters ready in the buffer, use them...
while (!eol && pdf->bufptr < pdf->bufend && bufptr < bufend)
while (!eol && pdf->bufptr < pdf->bufend)
{
char ch = *(pdf->bufptr++); // Next character in buffer
@@ -168,8 +169,10 @@ _pdfioFileGets(pdfio_file_t *pdf, // I - PDF file
pdf->bufptr ++;
}
}
else
else if (bufptr < bufend)
*bufptr++ = ch;
else if (!discard)
break;
}
// Fill the read buffer as needed...