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Add pdfioObjGetLength function.

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This commit is contained in:
Michael R Sweet
2021-05-08 19:16:27 -04:00
parent f8f048b87a
commit 4e4c47ab33
3 changed files with 42 additions and 25 deletions
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38
pdfio-object.c
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@ -91,6 +91,44 @@ pdfioObjGetGeneration(pdfio_obj_t *obj) // I - Object
}
//
// 'pdfioObjGetLength()' - Get the length of the object's (data) stream.
//
size_t // O - Length in bytes or `0` for none
pdfioObjGetLength(pdfio_obj_t *obj) // I - Object
{
size_t length; // Length of stream
pdfio_obj_t *lenobj; // Length object
// Range check input...
if (!obj || !obj->stream_offset || obj->value.type != PDFIO_VALTYPE_DICT)
return (0);
// Try getting the length, directly or indirectly
if ((length = (size_t)pdfioDictGetNumber(obj->value.value.dict, "Length")) > 0)
return (length);
if ((lenobj = pdfioDictGetObject(obj->value.value.dict, "Length")) == NULL)
{
_pdfioFileError(obj->pdf, "Unable to get length of stream.");
return (0);
}
if (lenobj->value.type == PDFIO_VALTYPE_NONE)
_pdfioObjLoad(lenobj);
if (lenobj->value.type != PDFIO_VALTYPE_NUMBER || lenobj->value.value.number <= 0.0f)
{
_pdfioFileError(obj->pdf, "Unable to get length of stream.");
return (0);
}
return ((size_t)lenobj->value.value.number);
}
//
// 'pdfioObjGetNumber()' - Get the object's number.
//