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libtiff/tif_luv.c: rewrite loops in a more readable way (to avoid false positive reports like http://bugzilla.maptools.org/show_bug.cgi?id=2779)

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This commit is contained in:
Even Rouault 2018-03-13 15:51:37 +01:00
parent 0a2e5e98b3
commit a621460666
1 changed files with 6 additions and 4 deletions
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10
libtiff/tif_luv.c
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@ -213,7 +213,7 @@ LogL16Decode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s)
bp = (unsigned char*) tif->tif_rawcp;
cc = tif->tif_rawcc;
/* get each byte string */
for (shft = 2*8; (shft -= 8) >= 0; ) {
for (shft = 8; shft >= 0; shft -=8) {
for (i = 0; i < npixels && cc > 0; ) {
if (*bp >= 128) { /* run */
if( cc < 2 )
@ -347,7 +347,7 @@ LogLuvDecode32(TIFF* tif, uint8* op, tmsize_t occ, uint16 s)
bp = (unsigned char*) tif->tif_rawcp;
cc = tif->tif_rawcc;
/* get each byte string */
for (shft = 4*8; (shft -= 8) >= 0; ) {
for (shft = 24; shft >= 0; shft -=8) {
for (i = 0; i < npixels && cc > 0; ) {
if (*bp >= 128) { /* run */
if( cc < 2 )
@ -465,7 +465,7 @@ LogL16Encode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
/* compress each byte string */
op = tif->tif_rawcp;
occ = tif->tif_rawdatasize - tif->tif_rawcc;
for (shft = 2*8; (shft -= 8) >= 0; )
for (shft = 8; shft >= 0; shft -=8) {
for (i = 0; i < npixels; i += rc) {
if (occ < 4) {
tif->tif_rawcp = op;
@ -520,6 +520,7 @@ LogL16Encode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
} else
rc = 0;
}
}
tif->tif_rawcp = op;
tif->tif_rawcc = tif->tif_rawdatasize - occ;
@ -616,7 +617,7 @@ LogLuvEncode32(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
/* compress each byte string */
op = tif->tif_rawcp;
occ = tif->tif_rawdatasize - tif->tif_rawcc;
for (shft = 4*8; (shft -= 8) >= 0; )
for (shft = 24; shft >= 0; shft -=8) {
for (i = 0; i < npixels; i += rc) {
if (occ < 4) {
tif->tif_rawcp = op;
@ -671,6 +672,7 @@ LogLuvEncode32(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
} else
rc = 0;
}
}
tif->tif_rawcp = op;
tif->tif_rawcc = tif->tif_rawdatasize - occ;