chore: import upstream snapshot with attribution

tools/cpp/checkInvalidValue.cpp

@@ -0,0 +1,113 @@
+//
+//  checkInvalidValue.cpp
+//  MNN
+//
+//  Created by MNN on 2019/10/28.
+//  Copyright © 2018, Alibaba Group Htargeting Limited
+//
+
+#include <assert.h>
+#include <stdio.h>
+#include <cmath>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <stdlib.h>
+
+#if defined(_MSC_VER)
+#include <Windows.h>
+#undef min
+#undef max
+#else
+#include <dirent.h>
+#include <sys/stat.h>
+#endif
+
+using namespace std;
+
+#define NONE "\e[0m"
+#define RED "\e[0;31m"
+#define GREEN "\e[0;32m"
+#define L_GREEN "\e[1;32m"
+#define BLUE "\e[0;34m"
+#define L_BLUE "\e[1;34m"
+#define Btarget "\e[1m"
+
+int main(int argc, char* argv[]) {
+    if (argc < 2) {
+        printf("Usage: ./checkInvalidValue.out outputDir [limit]\n");
+        return 0;
+    }
+
+    // read args
+    printf("Compare:\n");
+    printf("%s\n", argv[1]);
+    float tolerance = 0.001;
+    int limit = 10;
+    if (argc > 2) {
+        limit = atoi(argv[2]);
+    }
+    printf("limit=%d\n", limit);
+
+    std::vector<std::string> compareFiles;
+#if defined(_MSC_VER)
+    WIN32_FIND_DATA ffd;
+    HANDLE hFind = INVALID_HANDLE_VALUE;
+    hFind = FindFirstFile(argv[1], &ffd);
+    if (INVALID_HANDLE_VALUE == hFind) {
+        printf("Error to open %s\n", argv[1]);
+        return 0;
+    }
+    do {
+        if(INVALID_FILE_ATTRIBUTES != GetFileAttributes(ffd.cFileName) && GetLastError() != ERROR_FILE_NOT_FOUND) {
+            compareFiles.push_back(ffd.cFileName);
+        }
+    } while (FindNextFile(hFind, &ffd) != 0);
+    FindClose(hFind);
+#else
+    // open dir
+    DIR* root = opendir(argv[1]);
+    if (NULL == root) {
+        printf("Error to open %s\n", argv[1]);
+        return 0;
+    }
+    struct dirent* ent;
+    while ((ent = readdir(root)) != NULL) {
+        compareFiles.push_back(ent->d_name);
+    }
+    closedir(root);
+#endif
+    auto limitValue = powf(10, limit);
+
+    // compare files
+    for (auto s : compareFiles) {
+        if (s.size() <= 2) {
+            continue;
+        }
+        std::string empty   = "";
+        std::string targetFile = empty + argv[1] + "/" + s;
+        std::ifstream targetOs(targetFile.c_str());
+        if (targetOs.fail()) {
+            // printf("Can's open %s\n", targetFile.c_str());
+            continue;
+        }
+        int pos      = 0;
+        bool correct = true;
+        float v1;
+        while (targetOs >> v1) {
+            auto absValue = fabsf(v1);
+            if (!isnan(v1) && absValue < limitValue) {
+                pos++;
+                continue;
+            }
+            printf(RED "Error for %s, %d, v1=%.6f\n" NONE, s.c_str(), pos, v1);
+            correct = false;
+            break;
+        }
+        if (correct) {
+            printf(GREEN "Correct : %s\n" NONE, s.c_str());
+        }
+    }
+
+    return 0;
+}