fix incorrect fileio.c

src/fileio.c

@@ -1,48 +1,56 @@
-#include <assert.h>
 #include <stdio.h>
 #include <string.h>
-#include "fileio.h"
-#include "global.h"
 
-/* Loads a binary file located at filePath to memory, taking up a block of exactly memorySize bytes,
-   and returns the starting address of the data. If memorySize is insufficient to store the entire file,
-   an appropriate error is reported. Excess memory is set to 0 bit values. */
+#define MAX_ASM_LINE_LENGTH 100
 
-byte *fileio_loadBin(const char *filePath, size_t memorySize) {
-    FILE *file = fopen(filePath, "rb");
-    if (file == NULL) {
-        fprintf(stderr, "Couldn't open %s!\n", filePath);
-        exit(EXIT_FAILURE);
-    }
+int isValidFileFormat(char filename[], char expectedExtension[]){
+    int *pointLoc = strrchr(filename, '.');
 
-    byte *fileData = malloc(memorySize);
-    if (fileData == NULL) {
-        fprintf(stderr, "Ran out of memory attempting to load %s!\n", filePath);
-        exit(EXIT_FAILURE);
-    }
-
-    // Loop while reading from the file yields data. Only terminates if EOF is reached or ERROR occurs.
-    // Explicitly deal with attempting to write too much data to memory block, rather than allow segfault.
-    const size_t byteCount = memorySize/sizeof(byte);
-    int i = 0;
-    while (fread(fileData + i, sizeof(byte), 1, file)) {
-        if (i >= byteCount) {
-            fprintf(stderr, "Attempting to load binary %s to memory of smaller size %zu!\n", filePath, memorySize);
-            exit(EXIT_FAILURE);
+    if(pointLoc != NULL){
+        if(strcmp(pointLoc, expectedExtension)==0){
+            return(1);
         }
-
-        i++;
     }
-
-    if (ferror(file)) {
-        fprintf(stderr, "Encountered error attempting to read %s!\n", filePath);
-        exit(EXIT_FAILURE);
-    }
-    assert(fclose(file) != EOF);
-
-    // If part of memory block was left uninitialized, initialize it to zero.
-    if (i < byteCount) {
-        memset(fileData + i, 0, (byteCount - i) * sizeof(byte));   
-    }
-    return fileData;
+    return(0);
+}
+
+int writeBinaryFile(word instrs[], char outputFile[]){
+
+    if (!isValidFileFormat(filename, "bin")){
+        return(-1);
+    }
+
+    FILE *fp; 
+    
+    fp = fopen(outputFile, "wb");
+
+    if(fp == NULL){
+        return(-1);
+    }
+
+    fwrite(instrs, 4, sizeof(instrs), fp);
+    fclose(fp);
+
+    return(0);
+}
+
+int readAssemblyFile(char inputFile[]) {
+    if (!isValidFileFormat(filename, "s")){
+        return(1);
+    }
+
+    FILE *fp;
+    char savedLine[MAX_ASM_LINE_LENGTH];
+
+    fp = fopen(inputFile, "r");
+
+    if(fp == NULL){
+        return(-1);
+    }
+    
+    while (fgets(savedLine, MAX_ASM_LINE_LENGTH-1, fp) != NULL) {
+        //pass line to parser
+    }
+
+    return(0);
 }