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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
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GPG Key ID: 999559A027815955
11 changed files with 244 additions and 68 deletions
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2
Makefile
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@ -16,7 +16,7 @@ ARFLAGS = cr
CC = cc
CFLAGS =
CODESIGN_IDENTITY = Developer ID
COMMONFLAGS = -g
COMMONFLAGS = Os -g
CPPFLAGS =
DESTDIR = $(DSTROOT)
DSO = cc

2
pdfio-array.c
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@ -242,6 +242,8 @@ pdfioArrayCopy(pdfio_file_t *pdf, // I - PDF file
vdst; // Current destination value
PDFIO_DEBUG("pdfioArrayCopy(pdf=%p, a=%p(%p))\n", pdf, a, a ? a->pdf : NULL);
// Create the new array...
if ((na = pdfioArrayCreate(pdf)) == NULL)
return (NULL);

21
pdfio-dict.c
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@ -36,6 +36,8 @@ pdfioDictCopy(pdfio_file_t *pdf, // I - PDF file
_pdfio_value_t v; // Current destination value
PDFIO_DEBUG("pdfioDictCopy(pdf=%p, dict=%p(%p))\n", pdf, dict, dict ? dict->pdf : NULL);
// Create the new dictionary...
if ((ndict = pdfioDictCreate(pdf)) == NULL)
return (NULL);
@ -49,7 +51,24 @@ pdfioDictCopy(pdfio_file_t *pdf, // I - PDF file
// Copy and add each of the source dictionary's key/value pairs...
for (i = dict->num_pairs, p = dict->pairs; i > 0; i --, p ++)
{
if (!_pdfioValueCopy(pdf, &v, dict->pdf, &p->value))
if (!strcmp(p->key, "Length") && p->value.type == PDFIO_VALTYPE_INDIRECT && dict->pdf != pdf)
{
// Don't use indirect stream lengths for copied objects...
pdfio_obj_t *lenobj = pdfioFileFindObject(dict->pdf, p->value.value.indirect.number);
// Length object
v.type = PDFIO_VALTYPE_NUMBER;
if (lenobj)
{
if (lenobj->value.type == PDFIO_VALTYPE_NONE)
_pdfioObjLoad(lenobj);
v.value.number = lenobj->value.value.number;
}
else
v.value.number = 0.0f;
}
else if (!_pdfioValueCopy(pdf, &v, dict->pdf, &p->value))
return (NULL); // Let pdfioFileClose do the cleanup...
if (_pdfioStringIsAllocated(dict->pdf, p->key))

86
pdfio-file.c
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@ -74,6 +74,35 @@ _pdfioFileAddMappedObject(
}
//
// '_pdfioFileAddPage()' - Add a page to a PDF file.
//
bool // O - `true` on success and `false` on failure
_pdfioFileAddPage(pdfio_file_t *pdf, // I - PDF file
pdfio_obj_t *obj) // I - Page object
{
// Add the page to the array of pages...
if (pdf->num_pages >= pdf->alloc_pages)
{
pdfio_obj_t **temp = (pdfio_obj_t **)realloc(pdf->pages, (pdf->alloc_pages + 16) * sizeof(pdfio_obj_t *));
if (!temp)
{
_pdfioFileError(pdf, "Unable to allocate memory for pages.");
return (false);
}
pdf->alloc_pages += 16;
pdf->pages = temp;
}
pdf->pages[pdf->num_pages ++] = obj;
return (true);
}
//
// 'pdfioFileClose()' - Close a PDF file and free all memory used for it.
//
@ -252,25 +281,37 @@ pdfio_obj_t * // O - New object
pdfioFileCreateObject(
pdfio_file_t *pdf, // I - PDF file
pdfio_dict_t *dict) // I - Object dictionary
{
_pdfio_value_t value; // Object value
value.type = PDFIO_VALTYPE_DICT;
value.value.dict = dict;
return (_pdfioFileCreateObject(pdf, dict->pdf, &value));
}
//
// '_pdfioFileCreateObject()' - Create a new object in a PDF file with a value.
//
pdfio_obj_t * // O - New object
_pdfioFileCreateObject(
pdfio_file_t *pdf, // I - PDF file
pdfio_file_t *srcpdf, // I - Source PDF file, if any
_pdfio_value_t *value) // I - Object dictionary
{
pdfio_obj_t *obj; // New object
// Range check input...
if (!pdf || !dict)
{
if (pdf)
_pdfioFileError(pdf, "Missing object dictionary.");
if (!pdf)
return (NULL);
}
if (pdf->mode != _PDFIO_MODE_WRITE)
return (NULL);
if (dict->pdf != pdf)
dict = pdfioDictCopy(pdf, dict); // Copy dictionary to new PDF
// Allocate memory for the object...
if ((obj = (pdfio_obj_t *)calloc(1, sizeof(pdfio_obj_t))) == NULL)
{
@ -297,10 +338,11 @@ pdfioFileCreateObject(
pdf->objs[pdf->num_objs ++] = obj;
// Initialize the object...
obj->pdf = pdf;
obj->number = pdf->num_objs;
obj->value.type = PDFIO_VALTYPE_DICT;
obj->value.value.dict = dict;
obj->pdf = pdf;
obj->number = pdf->num_objs;
if (value)
_pdfioValueCopy(pdf, &obj->value, srcpdf, value);
// Don't write anything just yet...
return (obj);
@ -359,22 +401,8 @@ pdfioFileCreatePage(pdfio_file_t *pdf, // I - PDF file
if (!pdfioObjClose(page))
return (NULL);
// Add the page to the array of pages...
if (pdf->num_pages >= pdf->alloc_pages)
{
pdfio_obj_t **temp = (pdfio_obj_t **)realloc(pdf->pages, (pdf->alloc_pages + 16) * sizeof(pdfio_obj_t *));
if (!temp)
{
_pdfioFileError(pdf, "Unable to allocate memory for pages.");
return (NULL);
}
pdf->alloc_pages += 16;
pdf->pages = temp;
}
pdf->pages[pdf->num_pages ++] = page;
if (!_pdfioFileAddPage(pdf, page))
return (NULL);
// Create the contents stream...
return (pdfioObjCreateStream(contents, PDFIO_FILTER_FLATE));

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);
}

31
pdfio-page.c
View File

@ -18,13 +18,32 @@
// 'pdfioPageCopy()' - Copy a page to a PDF file.
//
pdfio_obj_t * // O - Destination page
bool // O - `true` on success, `false` on failure
pdfioPageCopy(pdfio_file_t *pdf, // I - PDF file
pdfio_obj_t *src) // I - Source page
pdfio_obj_t *srcpage) // I - Source page
{
// TODO: Implement pdfioPageCopy
(void)pdf;
(void)src;
pdfio_obj_t *dstpage; // Destination page object
return (NULL);
PDFIO_DEBUG("pdfioPageCopy(pdf=%p, srcpage=%p(%p))\n", pdf, srcpage, srcpage ? srcpage->pdf : NULL);
// Range check input
if (!pdf || !srcpage || srcpage->value.type != PDFIO_VALTYPE_DICT)
{
if (pdf)
{
if (!srcpage)
_pdfioFileError(pdf, "NULL page object specified.");
else
_pdfioFileError(pdf, "Object is not a page.");
}
return (false);
}
// Copy the page object and add it to the pages array...
if ((dstpage = pdfioObjCopy(pdf, srcpage)) == NULL)
return (false);
else
return (_pdfioFileAddPage(pdf, dstpage));
}

2
pdfio-private.h
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@ -288,7 +288,9 @@ extern bool _pdfioDictSetValue(pdfio_dict_t *dict, const char *key, _pdfio_valu
extern bool _pdfioDictWrite(pdfio_dict_t *dict, off_t *length) PDFIO_INTERNAL;
extern bool _pdfioFileAddMappedObject(pdfio_file_t *pdf, pdfio_obj_t *dst_obj, pdfio_obj_t *src_obj) PDFIO_INTERNAL;
extern bool _pdfioFileAddPage(pdfio_file_t *pdf, pdfio_obj_t *obj) PDFIO_INTERNAL;
extern bool _pdfioFileConsume(pdfio_file_t *pdf, size_t bytes) PDFIO_INTERNAL;
extern pdfio_obj_t *_pdfioFileCreateObject(pdfio_file_t *pdf, pdfio_file_t *srcpdf, _pdfio_value_t *value) PDFIO_INTERNAL;
extern bool _pdfioFileDefaultError(pdfio_file_t *pdf, const char *message, void *data) PDFIO_INTERNAL;
extern bool _pdfioFileError(pdfio_file_t *pdf, const char *format, ...) PDFIO_FORMAT(2,3) PDFIO_INTERNAL;
extern pdfio_obj_t *_pdfioFileFindMappedObject(pdfio_file_t *pdf, pdfio_file_t *src_pdf, size_t src_number) PDFIO_INTERNAL;

6
pdfio-stream.c
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@ -85,7 +85,7 @@ pdfioStreamClose(pdfio_stream_t *st) // I - Stream
st->obj->stream_length = (size_t)(_pdfioFileTell(st->pdf) - st->obj->stream_offset);
// End of stream marker...
if (!_pdfioFilePuts(st->pdf, "\nendstream\n"))
if (!_pdfioFilePuts(st->pdf, "\nendstream\nendobj\n"))
{
ret = false;
goto done;
@ -598,11 +598,9 @@ pdfioStreamRead(
{
// Read large amounts directly to caller's buffer...
if ((rbytes = stream_read(st, bufptr, bytes)) > 0)
{
bufptr += rbytes;
bytes = 0;
}
bytes = 0;
st->bufptr = st->bufend = st->buffer;
break;
}

18
pdfio-value.c
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@ -25,8 +25,26 @@ _pdfioValueCopy(pdfio_file_t *pdfdst, // I - Destination PDF file
_pdfio_value_t *vsrc) // I - Source value
{
pdfio_obj_t *obj; // Object reference
#ifdef DEBUG
static const char * const types[] = // Type strings for debug
{
"PDFIO_VALTYPE_NONE",
"PDFIO_VALTYPE_ARRAY",
"PDFIO_VALTYPE_BINARY",
"PDFIO_VALTYPE_BOOLEAN",
"PDFIO_VALTYPE_DATE",
"PDFIO_VALTYPE_DICT",
"PDFIO_VALTYPE_INDIRECT",
"PDFIO_VALTYPE_NAME",
"PDFIO_VALTYPE_NULL",
"PDFIO_VALTYPE_NUMBER",
"PDFIO_VALTYPE_STRING"
};
#endif // DEBUG
PDFIO_DEBUG("_pdfioValueCopy(pdfdst=%p, vdst=%p, pdfsrc=%p, vsrc=%p(%s))\n", pdfdst, vdst, pdfsrc, vsrc, types[vsrc->type]);
if (pdfdst == pdfsrc && vsrc->type != PDFIO_VALTYPE_BINARY)
{
// For the same document we can copy the values without any other effort

2
pdfio.h
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@ -172,7 +172,7 @@ extern size_t pdfioObjGetNumber(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern const char *pdfioObjGetType(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern pdfio_stream_t *pdfioObjOpenStream(pdfio_obj_t *obj, bool decode) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioPageCopy(pdfio_file_t *pdf, pdfio_obj_t *srcpage) PDFIO_PUBLIC;
extern bool pdfioPageCopy(pdfio_file_t *pdf, pdfio_obj_t *srcpage) PDFIO_PUBLIC;
extern size_t pdfioPageGetNumStreams(pdfio_obj_t *page) PDFIO_PUBLIC;
extern pdfio_stream_t *pdfioPageOpenStream(pdfio_obj_t *page, size_t n, bool decode) PDFIO_PUBLIC;

60
testpdfio.c
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@ -149,13 +149,15 @@ do_unit_tests(void)
{
int i; // Looping var
char filename[256]; // PDF filename
pdfio_file_t *pdf; // PDF file
pdfio_file_t *pdf, // Test PDF file
*outpdf; // Output PDF file
bool error = false; // Error callback data
_pdfio_token_t tb; // Token buffer
const char *s; // String buffer
_pdfio_value_t value; // Value
pdfio_obj_t *color_jpg, // color.jpg image
*gray_jpg; // gray.jpg image
*gray_jpg, // gray.jpg image
*page; // Page from test PDF file
static const char *complex_dict = // Complex dictionary value
"<</Annots 5457 0 R/Contents 5469 0 R/CropBox[0 0 595.4 842]/Group 725 0 R"
"/MediaBox[0 0 595.4 842]/Parent 23513 0 R/Resources<</ColorSpace<<"
@ -192,47 +194,73 @@ do_unit_tests(void)
else
return (1);
// Close the test PDF file...
fputs("pdfioFileClose: ", stdout);
if (pdfioFileClose(pdf))
puts("PASS");
else
return (1);
// Create a new PDF file...
fputs("pdfioFileCreate(\"testpdfio-out.pdf\", ...): ", stdout);
if ((pdf = pdfioFileCreate("testpdfio-out.pdf", NULL, NULL, NULL, (pdfio_error_cb_t)error_cb, &error)) != NULL)
if ((outpdf = pdfioFileCreate("testpdfio-out.pdf", NULL, NULL, NULL, (pdfio_error_cb_t)error_cb, &error)) != NULL)
puts("PASS");
else
return (1);
// Create some image objects...
fputs("pdfioFileCreateImageObject(\"testfiles/color.jpg\"): ", stdout);
if ((color_jpg = pdfioFileCreateImageObject(pdf, "testfiles/color.jpg", true)) != NULL)
if ((color_jpg = pdfioFileCreateImageObject(outpdf, "testfiles/color.jpg", true)) != NULL)
puts("PASS");
else
return (1);
fputs("pdfioFileCreateImageObject(\"testfiles/gray.jpg\"): ", stdout);
if ((gray_jpg = pdfioFileCreateImageObject(pdf, "testfiles/gray.jpg", true)) != NULL)
if ((gray_jpg = pdfioFileCreateImageObject(outpdf, "testfiles/gray.jpg", true)) != NULL)
puts("PASS");
else
return (1);
// Copy the first page from the test PDF file...
fputs("pdfioFileGetPage(0): ", stdout);
if ((page = pdfioFileGetPage(pdf, 0)) != NULL)
puts("PASS");
else
return (1);
fputs("pdfioPageCopy(first page): ", stdout);
if (pdfioPageCopy(outpdf, page))
puts("PASS");
else
return (1);
// Write a few pages...
for (i = 1; i < 18; i ++)
for (i = 1; i < 16; i ++)
{
if (write_page(pdf, i, (i & 1) ? color_jpg : gray_jpg))
if (write_page(outpdf, i, (i & 1) ? color_jpg : gray_jpg))
return (1);
}
// Close the new PDF file...
fputs("pdfioFileClose: ", stdout);
// Copy the third page from the test PDF file...
fputs("pdfioFileGetPage(2): ", stdout);
if ((page = pdfioFileGetPage(pdf, 2)) != NULL)
puts("PASS");
else
return (1);
fputs("pdfioPageCopy(third page): ", stdout);
if (pdfioPageCopy(outpdf, page))
puts("PASS");
else
return (1);
// Close the test PDF file...
fputs("pdfioFileClose(\"testfiles/testpdfio.pdf\": ", stdout);
if (pdfioFileClose(pdf))
puts("PASS");
else
return (1);
// Close the new PDF file...
fputs("pdfioFileClose(\"testpdfio-out.pdf\": ", stdout);
if (pdfioFileClose(outpdf))
puts("PASS");
else
return (1);
return (0);
}