#include "tif_predict.h"
#include <math.h>
-tdata_t
-_TIFFCheckMalloc(TIFF* tif, size_t nmemb, size_t elem_size, const char* what)
+uint32
+_TIFFMultiply32(TIFF* tif, uint32 first, uint32 second, const char* where)
{
- tdata_t cp = NULL;
- tsize_t bytes = nmemb * elem_size;
+ uint32 bytes = first * second;
+
+ if (second && bytes / second != first) {
+ TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
+ bytes = 0;
+ }
+
+ return bytes;
+}
+
+uint64
+_TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where)
+{
+ uint64 bytes = first * second;
+
+ if (second && bytes / second != first) {
+ TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
+ bytes = 0;
+ }
+
+ return bytes;
+}
+
+void*
+_TIFFCheckRealloc(TIFF* tif, void* buffer,
+ tmsize_t nmemb, tmsize_t elem_size, const char* what)
+{
+ void* cp = NULL;
+ tmsize_t bytes = nmemb * elem_size;
/*
* XXX: Check for integer overflow.
*/
if (nmemb && elem_size && bytes / elem_size == nmemb)
- cp = _TIFFmalloc(bytes);
+ cp = _TIFFrealloc(buffer, bytes);
+
+ if (cp == NULL) {
+ TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
+ "Failed to allocate memory for %s "
+ "(%ld elements of %ld bytes each)",
+ what,(long) nmemb, (long) elem_size);
+ }
- if (cp == NULL)
- TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space %s", what);
+ return cp;
+}
- return (cp);
+void*
+_TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what)
+{
+ return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
}
static int
TIFFDefaultTransferFunction(TIFFDirectory* td)
{
uint16 **tf = td->td_transferfunction;
- tsize_t i, n, nbytes;
+ tmsize_t i, n, nbytes;
tf[0] = tf[1] = tf[2] = 0;
- if (td->td_bitspersample >= sizeof(tsize_t) * 8 - 2)
+ if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
return 0;
- n = 1<<td->td_bitspersample;
+ n = ((tmsize_t)1)<<td->td_bitspersample;
nbytes = n * sizeof (uint16);
if (!(tf[0] = (uint16 *)_TIFFmalloc(nbytes)))
return 0;
return 0;
}
+static int
+TIFFDefaultRefBlackWhite(TIFFDirectory* td)
+{
+ int i;
+
+ if (!(td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float))))
+ return 0;
+ if (td->td_photometric == PHOTOMETRIC_YCBCR) {
+ /*
+ * YCbCr (Class Y) images must have the ReferenceBlackWhite
+ * tag set. Fix the broken images, which lacks that tag.
+ */
+ td->td_refblackwhite[0] = 0.0F;
+ td->td_refblackwhite[1] = td->td_refblackwhite[3] =
+ td->td_refblackwhite[5] = 255.0F;
+ td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
+ } else {
+ /*
+ * Assume RGB (Class R)
+ */
+ for (i = 0; i < 3; i++) {
+ td->td_refblackwhite[2*i+0] = 0;
+ td->td_refblackwhite[2*i+1] =
+ (float)((1L<<td->td_bitspersample)-1L);
+ }
+ }
+ return 1;
+}
+
/*
* Like TIFFGetField, but return any default
* value if the tag is not present in the directory.
* place in the library -- in TIFFDefaultDirectory.
*/
int
-TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap)
+TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
{
TIFFDirectory *td = &tif->tif_dir;
}
return (1);
case TIFFTAG_REFERENCEBLACKWHITE:
- {
- int i;
- static float ycbcr_refblackwhite[] =
- { 0.0F, 255.0F, 128.0F, 255.0F, 128.0F, 255.0F };
- static float rgb_refblackwhite[6];
-
- for (i = 0; i < 3; i++) {
- rgb_refblackwhite[2 * i + 0] = 0.0F;
- rgb_refblackwhite[2 * i + 1] =
- (float)((1L<<td->td_bitspersample)-1L);
- }
-
- if (td->td_photometric == PHOTOMETRIC_YCBCR) {
- /*
- * YCbCr (Class Y) images must have the
- * ReferenceBlackWhite tag set. Fix the
- * broken images, which lacks that tag.
- */
- *va_arg(ap, float **) = ycbcr_refblackwhite;
- } else {
- /*
- * Assume RGB (Class R)
- */
- *va_arg(ap, float **) = rgb_refblackwhite;
- }
- return 1;
- }
+ if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
+ return (0);
+ *va_arg(ap, float **) = td->td_refblackwhite;
+ return (1);
}
return 0;
}
* value if the tag is not present in the directory.
*/
int
-TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...)
+TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...)
{
int ok;
va_list ap;
return (ok);
}
+struct _Int64Parts {
+ int32 low, high;
+};
+
+typedef union {
+ struct _Int64Parts part;
+ int64 value;
+} _Int64;
+
+float
+_TIFFUInt64ToFloat(uint64 ui64)
+{
+ _Int64 i;
+
+ i.value = ui64;
+ if (i.part.high >= 0) {
+ return (float)i.value;
+ } else {
+ long double df;
+ df = (long double)i.value;
+ df += 18446744073709551616.0; /* adding 2**64 */
+ return (float)df;
+ }
+}
+
+double
+_TIFFUInt64ToDouble(uint64 ui64)
+{
+ _Int64 i;
+
+ i.value = ui64;
+ if (i.part.high >= 0) {
+ return (double)i.value;
+ } else {
+ long double df;
+ df = (long double)i.value;
+ df += 18446744073709551616.0; /* adding 2**64 */
+ return (double)df;
+ }
+}
+
/* vim: set ts=8 sts=8 sw=8 noet: */
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 8
+ * fill-column: 78
+ * End:
+ */
projects / wxWidgets.git / blobdiff