upload android base code part6

android/system/extras/libfec/test/test_rs.c

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <fec.h>
+
+#define FEC_RSM 255
+#define FEC_ROOTS 16
+#define FEC_RSN (FEC_RSM - FEC_ROOTS)
+#define FEC_PARAMS(roots) \
+    8, 0x11d, 0, 1, (roots), 0
+
+int main()
+{
+    uint8_t data[FEC_RSM];
+    uint8_t dupl[FEC_RSM];
+    uint8_t corr[FEC_RSM];
+    int i, rc, neras, errors;
+    int erasures[FEC_RSM];
+    void *rs;
+
+    memset(data, 0x00, sizeof(data));
+    memset(corr, 0x00, sizeof(corr));
+
+    rs = init_rs_char(FEC_PARAMS(FEC_ROOTS));
+
+    if (!rs) {
+        perror("init_rs_char");
+        exit(1);
+    }
+
+    encode_rs_char(rs, data, &corr[FEC_RSN]);
+
+    for (neras = 1; neras <= FEC_ROOTS; ++neras) {
+        printf("%d errors\n", neras);
+
+        for (i = 0; i < neras; ++i) {
+            corr[i] = 0xFD;
+            erasures[i] = i;
+        }
+
+        memcpy(dupl, corr, sizeof(corr));
+
+        rc = decode_rs_char(rs, corr, NULL, 0);
+
+        printf("\tno erasures: %d\n", rc);
+
+        errors = 0;
+        for (i = 0; i < FEC_RSN; ++i) {
+            if (corr[i] != 0x00) {
+                printf("\t\terror at %d (%02x)\n", i, corr[i]);
+                ++errors;
+            }
+        }
+        printf("\t\t%d errors in output\n", errors);
+
+        rc = decode_rs_char(rs, dupl, erasures, neras);
+
+        printf("\terasures: %d\n", rc);
+
+        errors = 0;
+        for (i = 0; i < FEC_RSN; ++i) {
+            if (dupl[i] != 0x00) {
+                printf("\t\terror at %d (%02x)\n", i, dupl[i]);
+                ++errors;
+            }
+        }
+        printf("\t\t%d errors in output\n", errors);
+    }
+
+    exit(0);
+}