From 75403940937c9ed569f870e03094e7a7297d0d75 Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Fri, 6 Jul 2018 20:28:42 +0200
Subject: [PATCH] q3map2/image.c: avoid the pyramid of if

---
 tools/quake3/q3map2/image.c | 126 ++++++++++++++++++------------------
 1 file changed, 62 insertions(+), 64 deletions(-)

diff --git a/tools/quake3/q3map2/image.c b/tools/quake3/q3map2/image.c
index 1732867b..4fb3f74e 100644
--- a/tools/quake3/q3map2/image.c
+++ b/tools/quake3/q3map2/image.c
@@ -398,83 +398,81 @@ image_t *ImageLoad( const char *filename ){
 	image->name = safe_malloc( strlen( name ) + 1 );
 	strcpy( image->name, name );
 
-	/* attempt to load tga */
-	StripExtension( name );
-	strcat( name, ".tga" );
-	size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
-	if ( size > 0 ) {
-		LoadTGABuffer( buffer, buffer + size, &image->pixels, &image->width, &image->height );
-	}
-	else
-	{
+	do {
+		/* attempt to load tga */
+		StripExtension( name );
+		strcat( name, ".tga" );
+		size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
+		if ( size > 0 ) {
+			LoadTGABuffer( buffer, buffer + size, &image->pixels, &image->width, &image->height );
+			break;
+		}
+
 		/* attempt to load png */
 		StripExtension( name );
 		strcat( name, ".png" );
 		size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
 		if ( size > 0 ) {
 			LoadPNGBuffer( buffer, size, &image->pixels, &image->width, &image->height );
+			break;
 		}
-		else
-		{
-			/* attempt to load jpg */
-			StripExtension( name );
-			strcat( name, ".jpg" );
-			size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
-			if ( size > 0 ) {
-				if ( LoadJPGBuff( buffer, size, &image->pixels, &image->width, &image->height ) == -1 && image->pixels != NULL ) {
-					// On error, LoadJPGBuff might store a pointer to the error message in image->pixels
-					Sys_FPrintf( SYS_WRN, "WARNING: LoadJPGBuff: %s\n", (unsigned char*) image->pixels );
-				}
-				alphaHack = qtrue;
+
+		/* attempt to load jpg */
+		StripExtension( name );
+		strcat( name, ".jpg" );
+		size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
+		if ( size > 0 ) {
+			if ( LoadJPGBuff( buffer, size, &image->pixels, &image->width, &image->height ) == -1 && image->pixels != NULL ) {
+				// On error, LoadJPGBuff might store a pointer to the error message in image->pixels
+				Sys_FPrintf( SYS_WRN, "WARNING: LoadJPGBuff: %s\n", (unsigned char*) image->pixels );
 			}
-			else
+			alphaHack = qtrue;
+			break;
+		}
+
+		/* attempt to load dds */
+		StripExtension( name );
+		strcat( name, ".dds" );
+		size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
+		if ( size > 0 ) {
+			LoadDDSBuffer( buffer, size, &image->pixels, &image->width, &image->height );
+
+			/* debug code */
+			#if 1
 			{
-				/* attempt to load dds */
-				StripExtension( name );
-				strcat( name, ".dds" );
-				size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
-				if ( size > 0 ) {
-					LoadDDSBuffer( buffer, size, &image->pixels, &image->width, &image->height );
-
-					/* debug code */
-					#if 1
-					{
-						ddsPF_t pf;
-						DDSGetInfo( (ddsBuffer_t*) buffer, NULL, NULL, &pf );
-						Sys_Printf( "pf = %d\n", pf );
-						if ( image->width > 0 ) {
-							StripExtension( name );
-							strcat( name, "_converted.tga" );
-							WriteTGA( "C:\\games\\quake3\\baseq3\\textures\\rad\\dds_converted.tga", image->pixels, image->width, image->height );
-						}
-					}
-					#endif
-				}
-				else
-				{
-					/* attempt to load ktx */
+				ddsPF_t pf;
+				DDSGetInfo( (ddsBuffer_t*) buffer, NULL, NULL, &pf );
+				Sys_Printf( "pf = %d\n", pf );
+				if ( image->width > 0 ) {
 					StripExtension( name );
-					strcat( name, ".ktx" );
-					size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
-					if ( size > 0 ) {
-						LoadKTXBufferFirstImage( buffer, size, &image->pixels, &image->width, &image->height );
-					}
-					#ifdef BUILD_CRUNCH
-					else
-					{
-						/* attempt to load crn */
-						StripExtension( name );
-						strcat( name, ".crn" );
-						size = vfsLoadFile( ( const char* ) name, ( void** ) &buffer, 0 );
-						if ( size > 0 ) {
-							LoadCRNBuffer( buffer, size, &image->pixels, &image->width, &image->height );
-						}
-					}
-					#endif // BUILD_CRUNCH
+					strcat( name, "_converted.tga" );
+					WriteTGA( "C:\\games\\quake3\\baseq3\\textures\\rad\\dds_converted.tga", image->pixels, image->width, image->height );
 				}
 			}
+			#endif // debug
+			break;
 		}
-	}
+
+		/* attempt to load ktx */
+		StripExtension( name );
+		strcat( name, ".ktx" );
+		size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
+		if ( size > 0 ) {
+			LoadKTXBufferFirstImage( buffer, size, &image->pixels, &image->width, &image->height );
+			break;
+		}
+
+		#ifdef BUILD_CRUNCH
+		/* attempt to load crn */
+		StripExtension( name );
+		strcat( name, ".crn" );
+		size = vfsLoadFile( ( const char* ) name, ( void** ) &buffer, 0 );
+		if ( size > 0 ) {
+			LoadCRNBuffer( buffer, size, &image->pixels, &image->width, &image->height );
+			break;
+		}
+		#endif // BUILD_CRUNCH
+	} while (qfalse);
 
 	/* free file buffer */
 	free( buffer );
-- 
2.39.2