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Attempt to fix Coverity warning:

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CID 1306634:  Integer handling issues  (SIGN_EXTENSION)
    Suspicious implicit sign extension: "img->samplesperpixel" with type
    "unsigned short" (16 bits, unsigned) is promoted in
    "img->col_offset * img->samplesperpixel" to type "int" (32 bits, signed),
    then sign-extended to type "long" (64 bits, signed).  If
    "img->col_offset * img->samplesperpixel" is greater than 0x7FFFFFFF, the
    upper bits of the result will all be 1.
This commit is contained in:
Lee Howard 2015-06-15 16:13:46 +00:00
parent 74d1dfd161
commit a2b4dfc83a
1 changed files with 5 additions and 5 deletions
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10
libtiff/tif_getimage.c
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@ -1,4 +1,4 @@
/* $Id: tif_getimage.c,v 1.88 2015-06-14 22:14:10 faxguy Exp $ */
/* $Id: tif_getimage.c,v 1.89 2015-06-15 16:13:46 faxguy Exp $ */
/*
* Copyright (c) 1991-1997 Sam Leffler
@ -660,7 +660,7 @@ gtTileContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
break;
}
pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif) + \
(fromskew * img->samplesperpixel);
((int32) fromskew * img->samplesperpixel);
if (tocol + this_tw > w)
{
/*
@ -827,7 +827,7 @@ gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
}
pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif) + \
(fromskew * img->samplesperpixel);
((int32) fromskew * img->samplesperpixel);
if (tocol + this_tw > w)
{
/*
@ -937,7 +937,7 @@ gtStripContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
}
pos = ((row + img->row_offset) % rowsperstrip) * scanline + \
(img->col_offset * img->samplesperpixel);
((int32) img->col_offset * img->samplesperpixel);
(*put)(img, raster+y*w, 0, y, w, nrow, fromskew, toskew, buf + pos);
y += (flip & FLIP_VERTICALLY ? -(int32) nrow : (int32) nrow);
}
@ -1069,7 +1069,7 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
}
pos = ((row + img->row_offset) % rowsperstrip) * scanline + \
(img->col_offset * img->samplesperpixel);
((int32) img->col_offset * img->samplesperpixel);
(*put)(img, raster+y*w, 0, y, w, nrow, fromskew, toskew, p0 + pos, p1 + pos,
p2 + pos, (alpha?(pa+pos):NULL));
y += (flip & FLIP_VERTICALLY ? -(int32) nrow : (int32) nrow);