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Implement pdfioObjCopy and pdfioPageCopy, with tests.

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This commit is contained in:
Michael R Sweet
2021-05-29 20:00:48 -04:00
parent 37842066c6
commit 35d22705fa
11 changed files with 244 additions and 68 deletions
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82
pdfio-object.c
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@ -42,22 +42,20 @@ pdfioObjClose(pdfio_obj_t *obj) // I - Object
// Write the object value
if (!write_obj_header(obj))
return (false);
// Write the "endobj" line...
return (_pdfioFilePuts(obj->pdf, "endobj\n"));
}
else if (obj->stream)
{
// Close the stream...
if (!pdfioStreamClose(obj->stream))
return (false);
return (pdfioStreamClose(obj->stream));
}
else
{
// Already closed
return (true);
}
// If we get here we wrote the object header or closed the stream and still
// need to write the "endobj" line...
return (_pdfioFilePuts(obj->pdf, "endobj\n"));
}
@ -69,11 +67,70 @@ pdfio_obj_t * // O - New object or `NULL` on error
pdfioObjCopy(pdfio_file_t *pdf, // I - PDF file
pdfio_obj_t *srcobj) // I - Object to copy
{
// TODO: Implement pdfioObjCopy
(void)pdf;
(void)srcobj;
pdfio_obj_t *dstobj; // Destination object
pdfio_stream_t *srcst, // Source stream
*dstst; // Destination stream
char buffer[32768]; // Copy buffer
ssize_t bytes; // Bytes read
return (NULL);
PDFIO_DEBUG("pdfioObjCopy(pdf=%p, srcobj=%p(%p))\n", pdf, srcobj, srcobj ? srcobj->pdf : NULL);
// Range check input
if (!pdf || !srcobj)
return (NULL);
// Load the object value if needed...
if (srcobj->value.type == PDFIO_VALTYPE_NONE)
_pdfioObjLoad(srcobj);
// Create the new object...
if ((dstobj = _pdfioFileCreateObject(pdf, srcobj->pdf, NULL)) == NULL)
return (NULL);
// Add new object to the cache of copied objects...
if (!_pdfioFileAddMappedObject(pdf, dstobj, srcobj))
return (NULL);
// Copy the object's value...
if (!_pdfioValueCopy(pdf, &dstobj->value, srcobj->pdf, &srcobj->value))
return (NULL);
if (srcobj->stream_offset)
{
// Copy stream data...
if ((srcst = pdfioObjOpenStream(srcobj, false)) == NULL)
{
pdfioObjClose(dstobj);
return (NULL);
}
if ((dstst = pdfioObjCreateStream(dstobj, PDFIO_FILTER_NONE)) == NULL)
{
pdfioStreamClose(srcst);
pdfioObjClose(dstobj);
return (NULL);
}
while ((bytes = pdfioStreamRead(srcst, buffer, sizeof(buffer))) > 0)
{
if (!pdfioStreamWrite(dstst, buffer, (size_t)bytes))
{
bytes = -1;
break;
}
}
pdfioStreamClose(srcst);
pdfioStreamClose(dstst);
if (bytes < 0)
return (NULL);
}
else
pdfioObjClose(dstobj);
return (dstobj);
}
@ -205,7 +262,10 @@ pdfioObjGetLength(pdfio_obj_t *obj) // I - Object
// Try getting the length, directly or indirectly
if ((length = (size_t)pdfioDictGetNumber(obj->value.value.dict, "Length")) > 0)
{
PDFIO_DEBUG("pdfioObjGetLength(obj=%p) returning %lu.\n", obj, (unsigned long)length);
return (length);
}
if ((lenobj = pdfioDictGetObject(obj->value.value.dict, "Length")) == NULL)
{
@ -222,6 +282,8 @@ pdfioObjGetLength(pdfio_obj_t *obj) // I - Object
return (0);
}
PDFIO_DEBUG("pdfioObjGetLength(obj=%p) returning %lu.\n", obj, (unsigned long)lenobj->value.value.number);
return ((size_t)lenobj->value.value.number);
}