From 91b4b78a3e35def58934ad7893295da77017c035 Mon Sep 17 00:00:00 2001
From: Andrew John Hughes <gnu_andrew@member.fsf.org>
Date: Thu, 5 Feb 2015 17:29:16 +0000
Subject: [PATCH] Support building against giflib 5.1.1.

---
 src/blocks/gifdbl.c | 13 +++++++++++++
 src/libming.h       | 31 ++++++++++++++++++++++++++++---
 util/gif2dbl.c      | 22 +++++++++++++++++++---
 util/gif2mask.c     | 19 +++++++++++++++----
 4 files changed, 75 insertions(+), 10 deletions(-)

diff --git a/src/blocks/gifdbl.c b/src/blocks/gifdbl.c
index d14b273..47e2e50 100644
--- a/src/blocks/gifdbl.c
+++ b/src/blocks/gifdbl.c
@@ -203,7 +203,12 @@ readGif(GifFileType *file, dblData result)
 	}
 
 	/* Done! */
+#if GIFLIB_MAJOR >= 5 && GIFLIB_MINOR >= 1
+	if (DGifCloseFile(file, NULL) != GIF_OK)
+	    return 0;
+#else
 	DGifCloseFile(file);
+#endif
 
 	result->data = malloc(outsize = (int)floor(size*1.01+12));
 
@@ -227,7 +232,11 @@ SWFDBLBitmapData newSWFDBLBitmapData_fromGifFile(const char *fileName)
 	SWFDBLBitmapData ret;
 	struct dbl_data gifdata;
 
+#if GIFLIB_MAJOR >= 5
+	if((file = DGifOpenFileName(fileName, NULL)) == NULL)
+#else
 	if((file = DGifOpenFileName(fileName)) == NULL)
+#endif
 		return NULL;
 	if(!readGif(file, &gifdata))
 		return NULL;
@@ -246,7 +255,11 @@ SWFDBLBitmapData newSWFDBLBitmapData_fromGifInput(SWFInput input)
 	SWFDBLBitmapData ret;
 	struct dbl_data gifdata;
 
+#if GIFLIB_MAJOR >= 5
+	if((file = DGifOpen(input, (InputFunc) gifReadFunc, NULL)) == NULL)
+#else
 	if((file = DGifOpen(input, (InputFunc) gifReadFunc)) == NULL)
+#endif
 		return NULL;
 	if(!readGif(file, &gifdata))
 		return NULL;
diff --git a/src/libming.h b/src/libming.h
index 84b367d..b26041f 100644
--- a/src/libming.h
+++ b/src/libming.h
@@ -75,13 +75,38 @@ typedef unsigned char BOOL;
   #include <unistd.h>
 #endif
 
-#if GIFLIB_GIFERRORSTRING
+#ifdef HAVE_GIF_LIB_H
 #include <gif_lib.h>
+#endif
+
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
+
+#if (defined(__GNUC__)) || __has_attribute(unused)
+#define UNUSED(x) UNUSED_ ## x __attribute__((__unused__))
+#else
+#define UNUSED(x) UNUSED_ ## x
+#endif
+
+#if GIFLIB_MAJOR < 5
+#define GIFLIB5_ONLY(x) UNUSED(x)
+#else
+#define GIFLIB5_ONLY(x) x
+#endif
+
 static void
-PrintGifError(void)
+PrintGifError(int GIFLIB5_ONLY(errorCode))
 {
+#if GIFLIB_GIFERRORSTRING
+#if GIFLIB_MAJOR < 5
 	fprintf(stderr, "\nGIF-LIB error: %s.\n", GifErrorString());
-}
+#else
+	fprintf(stderr, "\nGIF-LIB error: %s.\n", GifErrorString(errorCode));
+#endif
+#else
+	fprintf(stderr, "\nGIF-LIB error but no GifErrorString support.\n");
 #endif
+}
 
 #endif /* SWF_LIBMING_H_INCLUDED */
diff --git a/util/gif2dbl.c b/util/gif2dbl.c
index 3c2e7f1..c89152f 100644
--- a/util/gif2dbl.c
+++ b/util/gif2dbl.c
@@ -19,10 +19,10 @@
 
 #include "libming.h"
 
-void error(char *msg)
+void error(char *msg, int errorCode)
 {
   printf("%s:\n\n", msg);
-  PrintGifError();
+  PrintGifError(errorCode);
   exit(-1);
 }
 
@@ -59,11 +59,22 @@ unsigned char *readGif(char *fileName, int *length, int *bytesPerColor)
   unsigned char *p;
   int i, nColors, size, alpha, bgColor, alignedWidth;
 
+#if GIFLIB_MAJOR < 5
   if((file = DGifOpenFileName(fileName)) == NULL)
     error("Error opening file");
+#else
+  int errorCode = 0;
+
+  if((file = DGifOpenFileName(fileName, &errorCode)) == NULL)
+    error("Error opening file", errorCode);
+#endif
 
   if(DGifSlurp(file) != GIF_OK)
-    error("Error slurping file");
+#if GIFLIB_MAJOR < 5
+    error("Error slurping file", 0);
+#else
+    error("Error slurping file", file->Error);
+#endif
 
   /* data should now be available */
 
@@ -190,7 +201,12 @@ unsigned char *readGif(char *fileName, int *length, int *bytesPerColor)
   }
 
 	/* Done! */
+#if GIFLIB_MAJOR >= 5 && GIFLIB_MINOR >= 1
+  if (DGifCloseFile(file, &errorCode) != GIF_OK)
+    error("Error closing file", errorCode);
+#else
   DGifCloseFile(file);
+#endif
 
   *length = size;
   return data;
diff --git a/util/gif2mask.c b/util/gif2mask.c
index 76e36c3..e101b60 100644
--- a/util/gif2mask.c
+++ b/util/gif2mask.c
@@ -13,10 +13,10 @@
 
 #define max(a,b,c) (((a)>(b))?(((c)>(a))?(c):(a)):(((c)>(b))?(c):(b)))
 
-void error(char *msg)
+void error(char *msg, int errorCode)
 {
   printf("%s:\n\n", msg);
-  PrintGifError();
+  PrintGifError(errorCode);
   exit(-1);
 }
 
@@ -28,11 +28,22 @@ unsigned char *readGif(char *fileName, int *length)
   unsigned char *data;
   int i, nColors, size;
 
+#if GIFLIB_MAJOR < 5
   if((file = DGifOpenFileName(fileName)) == NULL)
-    error("Error opening file");
+    error("Error opening file", 0);
+#else
+  int errorCode = 0;
+
+  if((file = DGifOpenFileName(fileName, &errorCode)) == NULL)
+    error("Error opening file", errorCode);
+#endif
 
   if(DGifSlurp(file) != GIF_OK)
-    error("Error slurping file");
+#if GIFLIB_MAJOR < 5
+    error("Error slurping file", 0);
+#else
+    error("Error slurping file", file->Error);
+#endif
 
   /* data should now be available */