Fix: File reading

.vscode/settings.json

@@ -9,7 +9,8 @@
     "optional": "c",
     "string_view": "c",
     "system_error": "c",
-    "variant": "c"
+    "variant": "c",
+    "array": "c"
   },
   "editor.formatOnSave": true
 }

Implementierung/lib/io.h

@@ -2,6 +2,7 @@
 #define IO_H
 
 #include <errno.h>
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -11,9 +12,10 @@
  * @brief reads a file at a path
  *
  * @param path the filepath
+ * @param data where to store the pointer to the data
  * @param size a pointer where the size of the result should be stored
  * @return the raw data
  */
-uint8_t* read_file(const char* path, size_t* size);
+bool read_file(const char* path, uint8_t** data, size_t* size);
 
 #endif  // IO_H

Implementierung/src/io.c

@@ -1,13 +1,13 @@
 #include "io.h"
 
-uint8_t* read_file(const char* path, size_t* size) {
+bool read_file(const char* path, uint8_t** data, size_t* size) {
   // Read the contents of the file specified by path into a heap-allocated
   // buffer and return a pointer to that buffer.
   FILE* f = fopen(path, "r");
   if (f == NULL) {
     printf("Fopen error: %d\n", errno);
     fclose(f);
-    return NULL;
+    return false;
   }
 
   struct stat statOfFile;
@@ -15,28 +15,28 @@ uint8_t* read_file(const char* path, size_t* size) {
   if (status == -1) {
     printf("Fstat error: %d\n", errno);
     fclose(f);
-    return NULL;
+    return false;
   };
 
   if ((statOfFile.st_mode & S_IFMT) != S_IFREG) {
     printf("File is not a regular file!\n");
     fclose(f);
-    return NULL;
+    return false;
   }
 
-  uint8_t* data = malloc(statOfFile.st_size);
+  (*data) = malloc(statOfFile.st_size);
 
   size_t bytesRead =
-      fread(data, statOfFile.st_blksize, statOfFile.st_blocks, f);
-  // Or: size_t bytesRead = fread(data, sizeof(char), statOfFile.st_size, f);
+      fread((*data), statOfFile.st_blksize, statOfFile.st_blocks, f);
+  // size_t bytesRead = fread(data, sizeof(uint8_t), statOfFile.st_size, f);
   if (bytesRead != 0 && !feof(f)) {
     printf("Error reading file!\n");
     fclose(f);
-    return NULL;
+    return false;
   }
 
   fclose(f);
 
-  (*size) = bytesRead;
-  return data;
+  (*size) = statOfFile.st_size;
+  return true;
 }

Implementierung/src/main.c

@@ -65,19 +65,23 @@ int main(int argc, char** argv) {
       "benchmark cycles: %d\n",
       c.filename, c.implementationToUse, c.doBenchmark, c.benchmarkingCycles);
 
-  runTests();
-  /*size_t len;
-  uint8_t* data = read_file(c.filename, &len);
+  // runTests();
+  size_t len;
+  uint8_t* data;
+  if (!read_file(c.filename, &data, &len)) {
+    printf("Error reading file %s!", c.filename);
+    return EXIT_FAILURE;
+  }
+  printf("File read with size: %zu\n", len);
+  printf("\n");
 
   uint8_t out[16];
-  const char* test = "abcdefghijklmnopqrstuvwxyz";
-  len = strlen(test);
-  md2_hash(len, test, out);
+  md2_hash(len, data, out);
 
   printf("Hash: ");
-  const char hash[16];
-  encodeHash(out, &hash);
-  printf("%s\n", hash);*/
+  char hash[16];
+  encodeHash(out, hash);
+  printf("%s\n", hash);
 
   return 0;
 }

Implementierung/src/md2.c

@@ -55,7 +55,7 @@ void md2_hash(size_t len, const uint8_t buf[len], uint8_t out[16]) {
   uint8_t* newBuf = calloc(len + 16, sizeof(uint8_t));
   memcpy(newBuf, buf, len - paddingNeeded);
 
-  printBuf(len + 16, newBuf);
+  // printBuf(len + 16, newBuf);
 
   while (paddingNeeded > 0) {
     newBuf[len - paddingNeeded] = originalPadding;