MAking code compatible with C89

5 files changed, 121 insertions, 114 deletions

diff --git a/tests/make_png/bitmap.c b/tests/make_png/bitmap.c
index 6f7cbb9ef..c5eef77ea 100644
--- a/tests/make_png/bitmap.c
+++ b/tests/make_png/bitmap.c
@@ -3,7 +3,7 @@
 HASH_128 * Generate_Hash_x64_128( FT_Bitmap * bitmap, 
                                   HASH_128 * murmur)
 {    
-  int seed = 99; // Dont change
+  int seed = 99; /* Dont change */
 
   MurmurHash3_x64_128(bitmap->buffer, 
                       (bitmap->pitch * bitmap->rows),
@@ -16,7 +16,7 @@ HASH_128 * Generate_Hash_x64_128( FT_Bitmap * bitmap,
 HASH_128 * Generate_Hash_x86_128( FT_Bitmap * bitmap,
                                   HASH_128 * murmur)
 {    
-  int seed = 99; // Dont change
+  int seed = 99; /* Dont change */
 
   MurmurHash3_x86_128(bitmap->buffer,
                       (bitmap->pitch * bitmap->rows),
@@ -29,7 +29,7 @@ HASH_128 * Generate_Hash_x86_128( FT_Bitmap * bitmap,
 HASH_32 * Generate_Hash_x86_32( FT_Bitmap * bitmap,
                                 HASH_32 * murmur)
 {    
-  int seed = 99; // Dont change
+  int seed = 99; /* Dont change */
 
   MurmurHash3_x86_32( bitmap->buffer,
                       (bitmap->pitch * bitmap->rows),
@@ -161,7 +161,7 @@ void Make_PNG(FT_Bitmap* bitmap,IMAGE* fruit,int i,int render_mode){
 
   switch(render_mode){
 
-    case 0 :  fruit->width = bitmap->width;           // MONO and GRAY
+    case 0 :  fruit->width = bitmap->width;           /* MONO and GRAY */
               fruit->height  = bitmap->rows;
 
               fruit->pixels = calloc ( fruit->width * fruit->height,
@@ -188,7 +188,7 @@ void Make_PNG(FT_Bitmap* bitmap,IMAGE* fruit,int i,int render_mode){
                 }
               }                    
               break;
-    case 1 :  fruit->width = bitmap->width;            // MONO and GRAY
+    case 1 :  fruit->width = bitmap->width;            /* MONO and GRAY */
               fruit->height  = bitmap->rows;
 
               fruit->pixels = calloc ( fruit->width * fruit->height,
@@ -211,7 +211,7 @@ void Make_PNG(FT_Bitmap* bitmap,IMAGE* fruit,int i,int render_mode){
               break;
 
     case 2 :
-    case 3 :  fruit->width = bitmap->width / 3;        // LCD
+    case 3 :  fruit->width = bitmap->width / 3;        /* LCD */
               fruit->height  = bitmap->rows;
 
               fruit->pixels = calloc ( fruit->width * fruit->height, 
@@ -240,7 +240,7 @@ void Make_PNG(FT_Bitmap* bitmap,IMAGE* fruit,int i,int render_mode){
               break;
 
     case 4 :
-    case 5 :  fruit->width = bitmap->width;            // LCD_V
+    case 5 :  fruit->width = bitmap->width;            /* LCD_V */
               fruit->height  = bitmap->rows / 3;
 
               fruit->pixels = calloc ( fruit->width * fruit->height,
@@ -276,7 +276,7 @@ void Make_PNG(FT_Bitmap* bitmap,IMAGE* fruit,int i,int render_mode){
 
 void Read_PNG(char *filename, IMAGE * after_effect) {
 
-  int width, height;
+  int width, height, x, y;
   png_bytep *row_pointers;
 
   FILE *fp = fopen(filename, "rb");
@@ -305,7 +305,7 @@ void Read_PNG(char *filename, IMAGE * after_effect) {
   after_effect->height = height;
 
   row_pointers = (png_bytep*)malloc(sizeof(png_bytep) * height);
-  for(int y = 0; y < height; y++) {
+  for( y = 0; y < height; y++) {
     row_pointers[y] = (png_byte*)malloc(png_get_rowbytes(png,info));
   }
 
@@ -314,11 +314,11 @@ void Read_PNG(char *filename, IMAGE * after_effect) {
   after_effect->pixels = 
   (PIXEL*) malloc( width * height * sizeof(PIXEL));
 
-  for(int y = 0; y < height; y++) {
+  for( y = 0; y < height; y++) {
 
     png_bytep row = row_pointers[y];
 
-    for(int x = 0; x < width; x++ ) {
+    for( x = 0; x < width; x++ ) {
 
       png_bytep px = &(row[x * 4]);
 
@@ -337,14 +337,15 @@ void Read_PNG(char *filename, IMAGE * after_effect) {
 int Add_effect(IMAGE* base, IMAGE* test, IMAGE* out, int Effect_ID)
 { 
   int pixel_diff = 0;
+  int x,y;
 
   out->width = base->width;
   out->height = base->height;
   out->pixels = 
   (PIXEL*)malloc(base->width * base->height * sizeof(PIXEL));
 
-  for(int y = 0; y < base->height; y++) {
-    for(int x = 0; x < base->width; x++ ) {
+  for( y = 0; y < base->height; y++) {
+    for( x = 0; x < base->width; x++ ) {
 
       PIXEL * pixel_base = Pixel_At ( base, x, y);
       PIXEL * pixel_test = Pixel_At ( test, x, y);
@@ -397,15 +398,17 @@ int Add_effect(IMAGE* base, IMAGE* test, IMAGE* out, int Effect_ID)
 
 void Stitch(IMAGE* left, IMAGE* right, IMAGE* result){
 
+  int x, y;
+
   result->width = left->width + right->width;
   result->height = MAX(left->height, right->height); 
 
   result->pixels = 
   (PIXEL*)calloc(result->width * result->height, sizeof(PIXEL));
 
-  for (int y = 0; y < left->height; ++y)
+  for ( y = 0; y < left->height; ++y)
   {
-    for (int x = 0; x < left->width; ++x)
+    for ( x = 0; x < left->width; ++x)
     {
       PIXEL * pixel_left = Pixel_At ( left, x, y);
       PIXEL * pixel_result = Pixel_At ( result, x, y);
@@ -417,9 +420,9 @@ void Stitch(IMAGE* left, IMAGE* right, IMAGE* result){
     }
   }
 
-  for (int y = 0; y < right->height; ++y)
+  for ( y = 0; y < right->height; ++y)
   {
-    for (int x = left->width; x < result->width; ++x)
+    for ( x = left->width; x < result->width; ++x)
     {
       PIXEL * pixel_right = Pixel_At ( right, x - left->width, y);
       PIXEL * pixel_result = Pixel_At ( result, x, y);
@@ -464,9 +467,11 @@ void Print_Row( FILE* fp, int index, char* name, int diff,
 
 int First_Column(IMAGE* input){
 
-  for (int x = 0; x < input->width; ++x)
+  int x, y;
+
+  for ( x = 0; x < input->width; ++x)
   {
-    for (int y = 0; y < input->height; ++y)
+    for ( y = 0; y < input->height; ++y)
     {
       PIXEL * pixel_result = Pixel_At ( input, x, y);
 
@@ -486,9 +491,11 @@ int First_Column(IMAGE* input){
 
 int First_Row(IMAGE* input){
 
-  for (int y = 0; y < input->height; ++y)
+  int x, y;
+  
+  for ( y = 0; y < input->height; ++y)
   {
-    for (int x = 0; x < input->width; ++x)
+    for ( x = 0; x < input->width; ++x)
     {
       PIXEL * pixel_result = Pixel_At ( input, x, y);
 
@@ -508,6 +515,8 @@ int First_Row(IMAGE* input){
 
 IMAGE* Append_Columns(IMAGE* small, IMAGE* big){
   
+  int x, y;
+
   IMAGE* result = (IMAGE*)malloc(sizeof(IMAGE));
 
   result->height = small->height;
@@ -517,9 +526,9 @@ IMAGE* Append_Columns(IMAGE* small, IMAGE* big){
 
   int first_col = First_Column(big);
 
-  for (int x = 0; x < first_col; ++x)
+  for ( x = 0; x < first_col; ++x)
   {
-    for (int y = 0; y < result->height; ++y)
+    for ( y = 0; y < result->height; ++y)
     {
       PIXEL * pixel_result = Pixel_At ( result, x, y);
 
@@ -530,9 +539,9 @@ IMAGE* Append_Columns(IMAGE* small, IMAGE* big){
     }
   }
 
-  for (int y = 0; y < result->height; ++y)
+  for ( y = 0; y < result->height; ++y)
   {
-    for (int x = first_col; x < first_col + small->width; ++x)
+    for ( x = first_col; x < first_col + small->width; ++x)
     {
       PIXEL * pixel_small = Pixel_At ( small, (x - first_col), y);
       PIXEL * pixel_result = Pixel_At ( result, x, y);
@@ -544,9 +553,9 @@ IMAGE* Append_Columns(IMAGE* small, IMAGE* big){
     }
   }
 
-  for (int x = first_col + small->width; x < result->width; ++x)
+  for ( x = first_col + small->width; x < result->width; ++x)
   {
-    for (int y = 0; y < result->height; ++y)
+    for ( y = 0; y < result->height; ++y)
     {
       PIXEL * pixel_result = Pixel_At ( result, x, y);
 
@@ -562,6 +571,8 @@ IMAGE* Append_Columns(IMAGE* small, IMAGE* big){
 
 IMAGE* Append_Rows(IMAGE* small, IMAGE* big){
   
+  int x, y;
+
   IMAGE* result = (IMAGE*)malloc(sizeof(IMAGE));
 
   result->height = big->height;
@@ -571,9 +582,9 @@ IMAGE* Append_Rows(IMAGE* small, IMAGE* big){
 
   int first_row = First_Row(big);
 
-  for (int y = 0; y < first_row; ++y)
+  for ( y = 0; y < first_row; ++y)
   {
-    for (int x = 0; x < result->width; ++x)
+    for ( x = 0; x < result->width; ++x)
     {
       PIXEL * pixel_result = Pixel_At ( result, x, y);
 
@@ -584,9 +595,9 @@ IMAGE* Append_Rows(IMAGE* small, IMAGE* big){
     }
   }
 
-  for (int y = first_row; y < first_row + small->height; ++y)
+  for ( y = first_row; y < first_row + small->height; ++y)
   {
-    for (int x = 0; x < result->width; ++x)
+    for ( x = 0; x < result->width; ++x)
     {
       PIXEL * pixel_small = Pixel_At ( small, x, y - first_row);
       PIXEL * pixel_result = Pixel_At ( result, x, y);
@@ -598,9 +609,9 @@ IMAGE* Append_Rows(IMAGE* small, IMAGE* big){
     }
   }
 
-  for (int y = first_row + small->height; y < result->height; ++y)
+  for ( y = first_row + small->height; y < result->height; ++y)
   {
-    for (int x = 0; x < result->width; ++x)
+    for ( x = 0; x < result->width; ++x)
     {
       PIXEL * pixel_result = Pixel_At ( result, x, y);
 
diff --git a/tests/make_png/bitmap.h b/tests/make_png/bitmap.h
index ef0da295b..95b97ceab 100644
--- a/tests/make_png/bitmap.h
+++ b/tests/make_png/bitmap.h
@@ -8,7 +8,7 @@
 
 #include <ft2build.h>
 
-#include "murmur3.h"            // MurmurHash3_x64_128 header file
+#include "murmur3.h"            /* MurmurHash3_x64_128 header file */
 
 #include <png.h>
 #include <dlfcn.h>
@@ -22,11 +22,11 @@
 #define BITS_PER_PIXEL_RGBA 32
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 
-typedef struct {                // To store 32bit Hash
+typedef struct {                /* To store 32bit Hash */
   FT_UInt32 hash;
 }HASH_32;
 
-typedef struct {                // To store 128bit Hash
+typedef struct {                /* To store 128bit Hash */
   FT_UInt32 hash[4];
 }HASH_128;
 
@@ -47,44 +47,45 @@ typedef struct {
 /* A picture. */
     
 typedef struct  {
-  PIXEL *pixels;
+  PIXEL* pixels;
   size_t width;
   size_t height;
 } IMAGE;
     
-//------------------------------------------------------------------------------
+/*-----------------------------------------------------------------*/
 
-HASH_32 * Generate_Hash_x86_32(FT_Bitmap * bitmap, HASH_32 * murmur);
-HASH_128 * Generate_Hash_x86_128(FT_Bitmap * bitmap, HASH_128 * murmur);
-HASH_128 * Generate_Hash_x64_128(FT_Bitmap * bitmap, HASH_128 * murmur);
+HASH_32* Generate_Hash_x86_32(FT_Bitmap* bitmap, HASH_32* murmur);
+HASH_128* Generate_Hash_x86_128(FT_Bitmap* bitmap, HASH_128* murmur);
+HASH_128* Generate_Hash_x64_128(FT_Bitmap* bitmap, HASH_128* murmur);
 
 int Compare_Hash(HASH_128* hash_b, HASH_128* hash_t);
 
-//------------------------------------------------------------------------------
+/*-----------------------------------------------------------------*/
 
-PIXEL * Pixel_At (IMAGE * bitmap, int x, int y);  // Returns a pointer to pixel
-                                                  // at (x,y) co-ordinate
-// buffer to image
+/* Returns a pointer to pixel */
+/* at (x,y) co-ordinate */
+PIXEL* Pixel_At (IMAGE * bitmap, int x, int y);  
+/* buffer to image */
 void Make_PNG (FT_Bitmap* bitmap,IMAGE* fruit, int i,int render_mode);
-// Image to file  
+/* Image to file */
 int Generate_PNG (IMAGE *bitmap, const char *path,int render_mode);   
-// Read PNG
+/* Read PNG */
 void Read_PNG(char *filename, IMAGE * after_effect);
-// Add an effect using two PNG images
-// Base Glyph = Gray {127,0,0,255} OR as it is 
-// Differences = Red {255,0,0,255}
-// Effect_ID = {1 or 2}
+/* Add an effect using two PNG images */
+/* Base Glyph = Gray {127,0,0,255} OR as it is */
+/* Differences = Red {255,0,0,255} */
+/* Effect_ID = {1 or 2} */
 int Add_effect(IMAGE* base, IMAGE* test, IMAGE* out, int Effect_ID);
-// Stitch 2 PNG files
+/* Stitch 2 PNG files */
 void Stitch(IMAGE* left, IMAGE* right, IMAGE* result);
-// Make the Height of both the PNG(s) same by filling with white pixels
+/* Print the row in list-view webpage */
 void Print_Row( FILE* fp, int index, char* name, int diff,
                 HASH_128* hash_b, HASH_128* hash_t);
-// Finding the first non-empty (non-white) column
+/* Finding the first non-empty (non-white) column */
 int First_Column(IMAGE* input);
-// Finding the first non-empty (non-white) row
+/* Finding the first non-empty (non-white) row */
 int First_Row(IMAGE* input);
-// Appening white columns with image alignment
+/* Appening white columns with image alignment */
 IMAGE* Append_Columns(IMAGE* small, IMAGE* big);
-// Appening white columns with image alignment
+/* Appening white columns with image alignment */
 IMAGE* Append_Rows(IMAGE* small, IMAGE* big);
diff --git a/tests/make_png/make_sprite.c b/tests/make_png/make_sprite.c
index 1f19e76d9..5ae7bc8dd 100644
--- a/tests/make_png/make_sprite.c
+++ b/tests/make_png/make_sprite.c
@@ -8,9 +8,9 @@ int main(int argc, char const *argv[])
   int              size;
   int              render_mode; 
 
-  int              load_flag;  // FT_LOAD_XXX
-  int              render_flag; // FT_RENDER_MODE_XXX
-  int              target_flag; // FT_LOAD_TARGET_XXX
+  int              load_flag;  /* FT_LOAD_XXX */
+  int              render_flag; /* FT_RENDER_MODE_XXX */
+  int              target_flag; /* FT_LOAD_TARGET_XXX */
 
   if(argc != 6)
   {
@@ -63,7 +63,7 @@ int main(int argc, char const *argv[])
   HASH_128 *  test_murmur = (HASH_128 *) malloc(sizeof(HASH_128)) ;  
 
   int Is_Different;
-  int pixel_diff;
+  int pixel_diff, i;
 
   char glyph_name[50] = ".not-def";
 /*******************************************************************/
@@ -351,8 +351,8 @@ int main(int argc, char const *argv[])
                               size,
                               DPI);
 
-// Need to write code to check the values in FT_Face and compare
-  for (int i = 0; i < base_face->num_glyphs; ++i)
+/* Need to write code to check the values in FT_Face and compare */
+  for ( i = 0; i < base_face->num_glyphs; ++i)
   {
     error = Base_Load_Glyph( base_face,
                              i, 
@@ -384,7 +384,7 @@ int main(int argc, char const *argv[])
 
     base_bitmap = &base_slot->bitmap;
     test_bitmap = &test_slot->bitmap;
-// Need to write code to check the values in FT_Bitmap and compare
+/* Need to write code to check the values in FT_Bitmap and compare */
     if (base_bitmap->width == 0 || base_bitmap->rows == 0)
     {
       printf("Empty Glyph in glyph-index %d\n", i);
diff --git a/tests/make_png/murmur3.c b/tests/make_png/murmur3.c
index 484ebfd03..6698c09d5 100644
--- a/tests/make_png/murmur3.c
+++ b/tests/make_png/murmur3.c
@@ -1,45 +1,40 @@
-//-----------------------------------------------------------------------------
-// Note - The x86 and x64 versions do _not_ produce the same results, as the
-// algorithms are optimized for their respective platforms. You can still
-// compile and run any of them on any platform, but your performance with the
-// non-native version will be less than optimal.
+/*------------------------------------------------------------------*/
+/* Note - The x86 and x64 versions do _not_ produce the same */
+/* results, as the algorithms are optimized for their respective */
+/* platforms. You can still compile and run any of them on any */
+/* platform, but your performance with the non-native version */
+/* will be less than optimal. */
 
 #include "murmur3.h"
 
-//-----------------------------------------------------------------------------
-// Platform-specific functions and macros
+/*------------------------------------------------------------------*/
+/* Platform-specific functions and macros */
 
-#ifdef __GNUC__
-#define FORCE_INLINE __attribute__((always_inline)) inline
-#else
-#define FORCE_INLINE inline
-#endif
-
-static FORCE_INLINE uint32_t rotl32 ( uint32_t x, int8_t r )
+static uint32_t rotl32 ( uint32_t x, int8_t r )
 {
   return (x << r) | (x >> (32 - r));
 }
 
-static FORCE_INLINE uint64_t rotl64 ( uint64_t x, int8_t r )
+static uint64_t rotl64 ( uint64_t x, int8_t r )
 {
   return (x << r) | (x >> (64 - r));
 }
 
-#define	ROTL32(x,y)	rotl32(x,y)
-#define ROTL64(x,y)	rotl64(x,y)
+#define ROTL32(x,y) rotl32(x,y)
+#define ROTL64(x,y) rotl64(x,y)
 
 #define BIG_CONSTANT(x) (x##LLU)
 
-//-----------------------------------------------------------------------------
-// Block read - if your platform needs to do endian-swapping or can only
-// handle aligned reads, do the conversion here
+/*------------------------------------------------------------------*/
+/* Block read - if your platform needs to do endian-swapping or can */
+/* only handle aligned reads, do the conversion here */
 
 #define getblock(p, i) (p[i])
 
-//-----------------------------------------------------------------------------
-// Finalization mix - force all bits of a hash block to avalanche
+/*------------------------------------------------------------------*/
+/* Finalization mix - force all bits of a hash block to avalanche */
 
-static FORCE_INLINE uint32_t fmix32 ( uint32_t h )
+static uint32_t fmix32 ( uint32_t h )
 {
   h ^= h >> 16;
   h *= 0x85ebca6b;
@@ -50,9 +45,9 @@ static FORCE_INLINE uint32_t fmix32 ( uint32_t h )
   return h;
 }
 
-//----------
+/*----------*/
 
-static FORCE_INLINE uint64_t fmix64 ( uint64_t k )
+static uint64_t fmix64 ( uint64_t k )
 {
   k ^= k >> 33;
   k *= BIG_CONSTANT(0xff51afd7ed558ccd);
@@ -63,7 +58,7 @@ static FORCE_INLINE uint64_t fmix64 ( uint64_t k )
   return k;
 }
 
-//-----------------------------------------------------------------------------
+/*------------------------------------------------------------------*/
 
 void MurmurHash3_x86_32 ( const void * key, int len,
                           uint32_t seed, void * out )
@@ -77,8 +72,8 @@ void MurmurHash3_x86_32 ( const void * key, int len,
   uint32_t c1 = 0xcc9e2d51;
   uint32_t c2 = 0x1b873593;
 
-  //----------
-  // body
+  /*----------*/
+  /* body */
 
   const uint32_t * blocks = (const uint32_t *)(data + nblocks*4);
 
@@ -95,8 +90,8 @@ void MurmurHash3_x86_32 ( const void * key, int len,
     h1 = h1*5+0xe6546b64;
   }
 
-  //----------
-  // tail
+  /*----------*/
+  /* tail */
 
   const uint8_t * tail = (const uint8_t*)(data + nblocks*4);
 
@@ -110,8 +105,8 @@ void MurmurHash3_x86_32 ( const void * key, int len,
           k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
   };
 
-  //----------
-  // finalization
+  /*----------*/
+  /* finalization */
 
   h1 ^= len;
 
@@ -120,7 +115,7 @@ void MurmurHash3_x86_32 ( const void * key, int len,
   *(uint32_t*)out = h1;
 } 
 
-//-----------------------------------------------------------------------------
+/*------------------------------------------------------------------*/
 
 void MurmurHash3_x86_128 ( const void * key, const int len,
                            uint32_t seed, void * out )
@@ -139,8 +134,8 @@ void MurmurHash3_x86_128 ( const void * key, const int len,
   uint32_t c3 = 0x38b34ae5; 
   uint32_t c4 = 0xa1e38b93;
 
-  //----------
-  // body
+  /*----------*/
+  /* body */
 
   const uint32_t * blocks = (const uint32_t *)(data + nblocks*16);
 
@@ -168,8 +163,8 @@ void MurmurHash3_x86_128 ( const void * key, const int len,
     h4 = ROTL32(h4,13); h4 += h1; h4 = h4*5+0x32ac3b17;
   }
 
-  //----------
-  // tail
+  /*----------*/
+  /* tail */
 
   const uint8_t * tail = (const uint8_t*)(data + nblocks*16);
 
@@ -204,8 +199,8 @@ void MurmurHash3_x86_128 ( const void * key, const int len,
            k1 *= c1; k1  = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
   };
 
-  //----------
-  // finalization
+  /*----------*/
+  /* finalization */
 
   h1 ^= len; h2 ^= len; h3 ^= len; h4 ^= len;
 
@@ -226,7 +221,7 @@ void MurmurHash3_x86_128 ( const void * key, const int len,
   ((uint32_t*)out)[3] = h4;
 }
 
-//-----------------------------------------------------------------------------
+/*------------------------------------------------------------------*/
 
 void MurmurHash3_x64_128 ( const void * key, const int len,
                            const uint32_t seed, void * out )
@@ -241,8 +236,8 @@ void MurmurHash3_x64_128 ( const void * key, const int len,
   uint64_t c1 = BIG_CONSTANT(0x87c37b91114253d5);
   uint64_t c2 = BIG_CONSTANT(0x4cf5ad432745937f);
 
-  //----------
-  // body
+  /*----------*/
+  /* body */
 
   const uint64_t * blocks = (const uint64_t *)(data);
 
@@ -260,8 +255,8 @@ void MurmurHash3_x64_128 ( const void * key, const int len,
     h2 = ROTL64(h2,31); h2 += h1; h2 = h2*5+0x38495ab5;
   }
 
-  //----------
-  // tail
+  /*----------*/
+  /* tail */
 
   const uint8_t * tail = (const uint8_t*)(data + nblocks*16);
 
@@ -290,8 +285,8 @@ void MurmurHash3_x64_128 ( const void * key, const int len,
            k1 *= c1; k1  = ROTL64(k1,31); k1 *= c2; h1 ^= k1;
   };
 
-  //----------
-  // finalization
+  /*----------*/
+  /* finalization*/
 
   h1 ^= len; h2 ^= len;
 
@@ -308,5 +303,5 @@ void MurmurHash3_x64_128 ( const void * key, const int len,
   ((uint64_t*)out)[1] = h2;
 }
 
-//-----------------------------------------------------------------------------
+/*------------------------------------------------------------------*/
 
diff --git a/tests/make_png/murmur3.h b/tests/make_png/murmur3.h
index 90878b00d..cd81c7fae 100644
--- a/tests/make_png/murmur3.h
+++ b/tests/make_png/murmur3.h
@@ -7,7 +7,7 @@
 extern "C" {
 #endif
 
-//-----------------------------------------------------------------------------
+/*-----------------------------------------------------------------*/
 
 void MurmurHash3_x86_32 (const void *key, int len, uint32_t seed, void *out);
 
@@ -15,10 +15,10 @@ void MurmurHash3_x86_128(const void *key, int len, uint32_t seed, void *out);
 
 void MurmurHash3_x64_128(const void *key, int len, uint32_t seed, void *out);
 
-//-----------------------------------------------------------------------------
+/*-----------------------------------------------------------------*/
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif // _MURMURHASH3_H_
+#endif /* _MURMURHASH3_H_ */