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-rw-r--r--Build/source/libs/libpng/libpng-src/contrib/powerpc-vsx/linux.c57
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diff --git a/Build/source/libs/libpng/libpng-src/contrib/powerpc-vsx/linux.c b/Build/source/libs/libpng/libpng-src/contrib/powerpc-vsx/linux.c
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index 00000000000..32ed9d7491d
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+++ b/Build/source/libs/libpng/libpng-src/contrib/powerpc-vsx/linux.c
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+/* contrib/powerpc-vsx/linux.c
+ *
+ * Copyright (c) 2017 Glenn Randers-Pehrson
+ * Written by Vadim Barkov, 2017.
+ * Last changed in libpng 1.6.29 [March 16, 2017]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * STATUS: TESTED
+ * BUG REPORTS: png-mng-implement@sourceforge.net
+ *
+ * png_have_vsx implemented for Linux by reading the widely available
+ * pseudo-file /proc/cpuinfo.
+ *
+ * This code is strict ANSI-C and is probably moderately portable; it does
+ * however use <stdio.h> and it assumes that /proc/cpuinfo is never localized.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "png.h"
+
+#ifndef MAXLINE
+# define MAXLINE 1024
+#endif
+
+static int
+png_have_vsx(png_structp png_ptr)
+{
+ FILE *f;
+
+ const char *string = "altivec supported";
+ char input[MAXLINE];
+ char *token = NULL;
+
+ PNG_UNUSED(png_ptr)
+
+ f = fopen("/proc/cpuinfo", "r");
+ if (f != NULL)
+ {
+ memset(input,0,MAXLINE);
+ while(fgets(input,MAXLINE,f) != NULL)
+ {
+ token = strstr(input,string);
+ if(token != NULL)
+ return 1;
+ }
+ }
+#ifdef PNG_WARNINGS_SUPPORTED
+ else
+ png_warning(png_ptr, "/proc/cpuinfo open failed");
+#endif
+ return 0;
+}