git subrepo clone https://github.com/libretro/libretro-common.git deps/libretro-common

[pcsx_rearmed.git] / deps / libretro-common / samples / utils / crc32.c

diff --git a/deps/libretro-common/samples/utils/crc32.c b/deps/libretro-common/samples/utils/crc32.c
new file mode 100644 (file)
index 0000000..786fed7
--- /dev/null
+++ b/deps/libretro-common/samples/utils/crc32.c
@@ -0,0 +1,43 @@
+/* gcc -O3 -o crc32 crc32.c -lz */
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include <encodings/crc32.h>
+
+int main(int argc, const char* argv[])
+{
+   if (argc != 2 )
+   {
+      fprintf( stderr, "Usage: crc32 <filename>\n" );
+      return 1;
+   }
+
+   FILE *file = fopen(argv[1], "rb");
+
+   if (file)
+   {
+      uint32_t crc = encoding_crc32(0L, NULL, 0 );
+
+      for (;;)
+      {
+         uint8_t buffer[16384];
+
+         int numread = fread((void*)buffer, 1, sizeof(buffer), file);
+
+         if (numread > 0)
+            crc = encoding_crc32( crc, buffer, numread );
+         else
+            break;
+      }
+
+      fclose(file);
+
+      printf("%08x\n", crc);
+      return 0;
+   }
+
+   fprintf(stderr, "Error opening input file: %s\n", strerror(errno));
+   return 1;
+}