Add SDL2 sources

SDL2-2.0.12/test/testiconv.c

@@ -0,0 +1,88 @@
+/*
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely.
+*/
+
+#include <stdio.h>
+
+#include "SDL.h"
+
+static size_t
+widelen(char *data)
+{
+    size_t len = 0;
+    Uint32 *p = (Uint32 *) data;
+    while (*p++) {
+        ++len;
+    }
+    return len;
+}
+
+int
+main(int argc, char *argv[])
+{
+    const char *formats[] = {
+        "UTF8",
+        "UTF-8",
+        "UTF16BE",
+        "UTF-16BE",
+        "UTF16LE",
+        "UTF-16LE",
+        "UTF32BE",
+        "UTF-32BE",
+        "UTF32LE",
+        "UTF-32LE",
+        "UCS4",
+        "UCS-4",
+    };
+    char buffer[BUFSIZ];
+    char *ucs4;
+    char *test[2];
+    int i;
+    FILE *file;
+    int errors = 0;
+
+    /* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    if (!argv[1]) {
+        argv[1] = "utf8.txt";
+    }
+    file = fopen(argv[1], "rb");
+    if (!file) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to open %s\n", argv[1]);
+        return (1);
+    }
+
+    while (fgets(buffer, sizeof(buffer), file)) {
+        /* Convert to UCS-4 */
+        size_t len;
+        ucs4 =
+            SDL_iconv_string("UCS-4", "UTF-8", buffer,
+                             SDL_strlen(buffer) + 1);
+        len = (widelen(ucs4) + 1) * 4;
+        for (i = 0; i < SDL_arraysize(formats); ++i) {
+            test[0] = SDL_iconv_string(formats[i], "UCS-4", ucs4, len);
+            test[1] = SDL_iconv_string("UCS-4", formats[i], test[0], len);
+            if (!test[1] || SDL_memcmp(test[1], ucs4, len) != 0) {
+                SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "FAIL: %s\n", formats[i]);
+                ++errors;
+            }
+            SDL_free(test[0]);
+            SDL_free(test[1]);
+        }
+        test[0] = SDL_iconv_string("UTF-8", "UCS-4", ucs4, len);
+        SDL_free(ucs4);
+        fputs(test[0], stdout);
+        SDL_free(test[0]);
+    }
+    fclose(file);
+    return (errors ? errors + 1 : 0);
+}