new demo

src/file.c

@@ -8,26 +8,27 @@ int
 fileCountLines(file_t* f) {
 	char ch;
 	int lines = 0;
+	FILE* fd = fopen(f->path, "r");
 
-	while ((ch = fgetc(f->descriptor)) != EOF) {
+	while ((ch = fgetc(fd)) != EOF) {
 		if (ch == '\n') {
 			lines++;
 		}
 	}
 
-	rewind(f->descriptor);
+	fclose(fd);
 
 	return lines;
 }
 
 void 
-_fileLoadLines(file_t* f) {
+_fileLoadLines(file_t* f, FILE* fd) {
     int lineLength;
     char ch;
     vector_t* line = vectorInit(CHAR);
 
     for (int i = 0; i < f->length; i++) {
-        while ((ch = fgetc(f->descriptor)) != '\n' && ch != EOF) {
+        while ((ch = fgetc(fd)) != '\n' && ch != EOF) {
             vectorPush(line, &ch);
         }
 
@@ -40,8 +41,6 @@ _fileLoadLines(file_t* f) {
         vectorPush(f->lines, line);
         line = vectorInit(CHAR);
     }
-
-    rewind(f->descriptor);
 }
 
 char* 
@@ -50,40 +49,34 @@ fileToString(file_t* f) {
 }
 
 file_t* 
-fileInit(char* path, char* mode) {
+fileInit(char* path) {
 	file_t* f = malloc(sizeof(file_t));
 	if (f == NULL) {
         perror("failed to allocate memory for the file\n");
         exit(EXIT_FAILURE);
     }
+
 	f->lines = malloc(sizeof(vector_t));
 	if (f->lines == NULL) {
         perror("failed to allocate memory for the file contents vector\n");
         exit(EXIT_FAILURE);
     }
-	int imode = 0;
 
-	if (strcmp(mode, "r") == 0) {
-		imode = 0;
-	} else if (strcmp(mode, "w") == 0) {
-		imode = 1;
-	} else if (strcmp(mode, "a") == 0) {
-		imode = 2;
-	} else {
-		perror("only allowed modes for file opening are \"r\", \"w\" and \"a\"\n");
-		exit(EXIT_FAILURE);
-	}
+	f->path = path;
 
-	f->descriptor = fopen(path, mode);
-	if (f->descriptor == NULL) {
-		fprintf(stderr, "unable to open file %s with mode %s\n", path, mode);
+	FILE* fd = fopen(f->path, "r");
+	if (fd == NULL) {
+		fprintf(stderr, "unable to open file %s with mode \"r\"\n", path);
+		fclose(fd);
 		fileCleanup(f);
 		exit(EXIT_FAILURE);
 	}
 
 	f->length = fileCountLines(f);
 	f->lines = vectorInit(VECTOR); // vector of vectors of chars = vector of strings
-	if (imode == 0) _fileLoadLines(f);
+	_fileLoadLines(f, fd);
+
+	fclose(fd);
 
 	return f;
 }
@@ -91,7 +84,6 @@ fileInit(char* path, char* mode) {
 void
 fileCleanup(file_t* f) {
 	vectorCleanup(f->lines);
-	fclose(f->descriptor);
 	free(f);
 }
 
@@ -102,4 +94,4 @@ filePrint(file_t* f) {
 		line = (vector_t *)vectorGetAt(f->lines, i);
 		vectorPrintAsString(line);
 	}
-}
+}