lut_inverse_interp16: remove odd whitespace formatting

third_party/qcms/google.patch

Index: third_party/qcms/google.patch
diff --git a/third_party/qcms/google.patch b/third_party/qcms/google.patch
index dea54fc41303d01fa328b0ecb5fb99720ba7e9a3..cf8b7c229328c26eb52e2088d9649ba70431555e 100644
--- a/third_party/qcms/google.patch
+++ b/third_party/qcms/google.patch
@@ -1,5 +1,5 @@
 diff --git a/third_party/qcms/src/iccread.c b/third_party/qcms/src/iccread.c
-index 36b7011..6cec34a 100644
+index 36b7011..208ebee 100644
 --- a/third_party/qcms/src/iccread.c
 +++ b/third_party/qcms/src/iccread.c
 @@ -266,7 +266,7 @@ qcms_bool qcms_profile_is_bogus(qcms_profile *profile)
@@ -230,7 +230,36 @@ index 36b7011..6cec34a 100644
  }
  
  static void mAB_release(struct lutmABType *lut)
-@@ -657,7 +817,7 @@ static struct lutType *read_tag_lutType(struct mem_source *src, struct tag_index
+@@ -540,7 +700,7 @@ static struct lutmABType *read_tag_lutmABType(struct mem_source *src, struct tag
+ 	// We require 3in/out channels since we only support RGB->XYZ (or RGB->LAB)
+ 	// XXX: If we remove this restriction make sure that the number of channels
+ 	//      is less or equal to the maximum number of mAB curves in qcmsint.h
+-	//      also check for clut_size overflow.
++	//      also check for clut_size overflow. Also make sure it's != 0
+ 	if (num_in_channels != 3 || num_out_channels != 3)
+ 		return NULL;
+ 
+@@ -570,6 +730,9 @@ static struct lutmABType *read_tag_lutmABType(struct mem_source *src, struct tag
+ 		// clut_size can not overflow since lg(256^num_in_channels) = 24 bits.
+ 		for (i = 0; i < num_in_channels; i++) {
+ 			clut_size *= read_u8(src, clut_offset + i);
++			if (clut_size == 0) {
++				invalid_source(src, "bad clut_size");
++			}
+ 		}
+ 	} else {
+ 		clut_size = 0;
+@@ -590,6 +753,9 @@ static struct lutmABType *read_tag_lutmABType(struct mem_source *src, struct tag
+ 
+ 	for (i = 0; i < num_in_channels; i++) {
+ 		lut->num_grid_points[i] = read_u8(src, clut_offset + i);
++		if (lut->num_grid_points[i] == 0) {
++			invalid_source(src, "bad grid_points");
++		}
+ 	}
+ 
+ 	// Reverse the processing of transformation elements for mBA type.
+@@ -657,7 +823,7 @@ static struct lutType *read_tag_lutType(struct mem_source *src, struct tag_index
  	uint16_t num_input_table_entries;
  	uint16_t num_output_table_entries;
  	uint8_t in_chan, grid_points, out_chan;
@@ -239,7 +268,50 @@ index 36b7011..6cec34a 100644
  	uint32_t clut_size;
  	size_t entry_size;
  	struct lutType *lut;
-@@ -979,6 +1139,9 @@ qcms_profile* qcms_profile_sRGB(void)
+@@ -672,6 +838,10 @@ static struct lutType *read_tag_lutType(struct mem_source *src, struct tag_index
+ 	} else if (type == LUT16_TYPE) {
+ 		num_input_table_entries  = read_u16(src, offset + 48);
+ 		num_output_table_entries = read_u16(src, offset + 50);
++		if (num_input_table_entries == 0 || num_output_table_entries == 0) {
++			invalid_source(src, "Bad channel count");
++			return NULL;
++		}
+ 		entry_size = 2;
+ 	} else {
+ 		assert(0); // the caller checks that this doesn't happen
+@@ -685,15 +855,18 @@ static struct lutType *read_tag_lutType(struct mem_source *src, struct tag_index
+ 
+ 	clut_size = pow(grid_points, in_chan);
+ 	if (clut_size > MAX_CLUT_SIZE) {
++		invalid_source(src, "CLUT too large");
+ 		return NULL;
+ 	}
+ 
+ 	if (in_chan != 3 || out_chan != 3) {
++		invalid_source(src, "CLUT only supports RGB");
+ 		return NULL;
+ 	}
+ 
+ 	lut = malloc(sizeof(struct lutType) + (num_input_table_entries * in_chan + clut_size*out_chan + num_output_table_entries * out_chan)*sizeof(float));
+ 	if (!lut) {
++		invalid_source(src, "CLUT too large");
+ 		return NULL;
+ 	}
+ 
+@@ -704,9 +877,9 @@ static struct lutType *read_tag_lutType(struct mem_source *src, struct tag_index
+ 
+ 	lut->num_input_table_entries  = num_input_table_entries;
+ 	lut->num_output_table_entries = num_output_table_entries;
+-	lut->num_input_channels   = read_u8(src, offset + 8);
+-	lut->num_output_channels  = read_u8(src, offset + 9);
+-	lut->num_clut_grid_points = read_u8(src, offset + 10);
++	lut->num_input_channels   = in_chan;
++	lut->num_output_channels  = out_chan;
++	lut->num_clut_grid_points = grid_points;
+ 	lut->e00 = read_s15Fixed16Number(src, offset+12);
+ 	lut->e01 = read_s15Fixed16Number(src, offset+16);
+ 	lut->e02 = read_s15Fixed16Number(src, offset+20);
+@@ -979,6 +1152,9 @@ qcms_profile* qcms_profile_sRGB(void)
  		return NO_MEM_PROFILE;
  
  	profile = qcms_profile_create_rgb_with_table(D65, Rec709Primaries, table, 1024);
@@ -249,7 +321,7 @@ index 36b7011..6cec34a 100644
  	free(table);
  	return profile;
  }
-@@ -997,6 +1160,9 @@ qcms_profile* qcms_profile_from_memory(const void *mem, size_t size)
+@@ -997,6 +1173,9 @@ qcms_profile* qcms_profile_from_memory(const void *mem, size_t size)
  	source.size = size;
  	source.valid = true;
  
@@ -259,7 +331,7 @@ index 36b7011..6cec34a 100644
  	length = read_u32(src, 0);
  	if (length <= size) {
  		// shrink the area that we can read if appropriate
-@@ -1028,6 +1194,15 @@ qcms_profile* qcms_profile_from_memory(const void *mem, size_t size)
+@@ -1028,6 +1207,15 @@ qcms_profile* qcms_profile_from_memory(const void *mem, size_t size)
  	if (!src->valid || !index.tags)
  		goto invalid_tag_table;
  
@@ -275,7 +347,7 @@ index 36b7011..6cec34a 100644
  	if (find_tag(index, TAG_CHAD)) {
  		profile->chromaticAdaption = read_tag_s15Fixed16ArrayType(src, index, TAG_CHAD);
  	} else {
-@@ -1098,6 +1273,16 @@ invalid_profile:
+@@ -1098,6 +1286,16 @@ invalid_profile:
  	return INVALID_PROFILE;
  }
  
@@ -1282,7 +1354,7 @@ index 9a6562b..f669a6b 100644
  
  qcms_bool qcms_supports_iccv4;
 diff --git a/third_party/qcms/src/transform_util.c b/third_party/qcms/src/transform_util.c
-index e8447e5..f4338b2 100644
+index e8447e5..f616c3f 100644
 --- a/third_party/qcms/src/transform_util.c
 +++ b/third_party/qcms/src/transform_util.c
 @@ -36,7 +36,7 @@
@@ -1365,7 +1437,88 @@ index e8447e5..f4338b2 100644
  }
  
  struct matrix build_colorant_matrix(qcms_profile *p)
-@@ -390,7 +408,7 @@ uint16_fract_t lut_inverse_interp16(uint16_t Value, uint16_t LutTable[], int len
+@@ -295,7 +313,7 @@ uint16_fract_t lut_inverse_interp16(uint16_t Value, uint16_t LutTable[], int len
+ 
+         NumZeroes = 0;
+         while (LutTable[NumZeroes] == 0 && NumZeroes < length-1)
+-                        NumZeroes++;
++            NumZeroes++;
+ 
+         // There are no zeros at the beginning and we are trying to find a zero, so
+         // return anything. It seems zero would be the less destructive choice
+@@ -305,22 +323,22 @@ uint16_fract_t lut_inverse_interp16(uint16_t Value, uint16_t LutTable[], int len
+ 
+         NumPoles = 0;
+         while (LutTable[length-1- NumPoles] == 0xFFFF && NumPoles < length-1)
+-                        NumPoles++;
++            NumPoles++;
+ 
+         // Does the curve belong to this case?
+         if (NumZeroes > 1 || NumPoles > 1)
+-        {               
++        {
+                 int a, b;
+ 
+-                // Identify if value fall downto 0 or FFFF zone             
++                // Identify if value fall downto 0 or FFFF zone
+                 if (Value == 0) return 0;
+                // if (Value == 0xFFFF) return 0xFFFF;
+ 
+                 // else restrict to valid zone
+ 
+-                a = ((NumZeroes-1) * 0xFFFF) / (length-1);               
++                a = ((NumZeroes-1) * 0xFFFF) / (length-1);
+                 b = ((length-1 - NumPoles) * 0xFFFF) / (length-1);
+-                                                                
++
+                 l = a - 1;
+                 r = b + 1;
+         }
+@@ -332,12 +350,12 @@ uint16_fract_t lut_inverse_interp16(uint16_t Value, uint16_t LutTable[], int len
+ 
+                 x = (l + r) / 2;
+ 
+-		res = (int) lut_interp_linear16((uint16_fract_t) (x-1), LutTable, length);
++                res = (int) lut_interp_linear16((uint16_fract_t) (x-1), LutTable, length);
+ 
+                 if (res == Value) {
+ 
+-                    // Found exact match. 
+-                    
++                    // Found exact match.
++
+                     return (uint16_fract_t) (x - 1);
+                 }
+ 
+@@ -347,14 +365,14 @@ uint16_fract_t lut_inverse_interp16(uint16_t Value, uint16_t LutTable[], int len
+ 
+         // Not found, should we interpolate?
+ 
+-                
++
+         // Get surrounding nodes
+-        
++
+         val2 = (length-1) * ((double) (x - 1) / 65535.0);
+ 
+         cell0 = (int) floor(val2);
+         cell1 = (int) ceil(val2);
+-           
++
+         if (cell0 == cell1) return (uint16_fract_t) x;
+ 
+         y0 = LutTable[cell0] ;
+@@ -373,8 +391,7 @@ uint16_fract_t lut_inverse_interp16(uint16_t Value, uint16_t LutTable[], int len
+         if (f < 0.0) return (uint16_fract_t) 0;
+         if (f >= 65535.0) return (uint16_fract_t) 0xFFFF;
+ 
+-        return (uint16_fract_t) floor(f + 0.5);                        
+-
++        return (uint16_fract_t) floor(f + 0.5);
+ }
+ 
+ /*
+@@ -390,7 +407,7 @@ uint16_fract_t lut_inverse_interp16(uint16_t Value, uint16_t LutTable[], int len
   which has an maximum error of about 9855 (pixel difference of ~38.346)
  
   For now, we punt the decision of output size to the caller. */