sumalibs first commit

libfile/fileHandling.c

@@ -0,0 +1,88 @@
+/**
+ * FileName:    fileHandling.c
+ * Authors:      Tiayyba Riaz, Celine Mercier
+ * Description: C file for file handling functions
+ * **/
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../libutils/utilities.h"
+
+/*
+ * Function Name: fileOpen(char* fileName, BOOL abortOnError)
+ * Description:   Opens the file and returns the pointer to file object
+ */
+FILE *file_open(char* fileName, BOOL abortOnError)
+{
+	FILE* fp;
+	
+	if (fileName == NULL && abortOnError)
+		ERRORABORT(FILE_OPENING_ERROR, "File name not given.");
+	
+	if (fileName == NULL)
+		return NULL;
+	
+	fp = fopen(fileName, "r");
+	return fp;
+}
+
+FILE *file_openrw(char* fileName, BOOL abortOnError)
+{
+	FILE* fp;
+	
+	if (fileName == NULL && abortOnError)
+		ERRORABORT(FILE_OPENING_ERROR, "File name not given.");
+	
+	if (fileName == NULL)
+		return NULL;
+	
+	fp = fopen(fileName, "w+");
+	 return fp;
+}
+
+/*
+ * Function Name: fileNextChar(FILE* fp)
+ * Description:   Reads the file and returns next character, if file is null or its end of file, returns \<5C>.
+ */
+char file_nextChar(FILE* fp)
+{
+	if (fp == NULL)
+		return '\0';
+	
+	if(feof(fp))
+		return '\0';
+	
+	return (char) fgetc(fp);
+}
+
+/*
+ * Function Name: *fileNextLine(FILE *fp, char *buffer, int32_t bufferSize)
+ * Description:   Reads the file and returns next line, if file is null or its end of file, returns \<5C>.
+ */
+char *file_nextLine(FILE *fp, char *buffer, int32_t bufferSize)
+{
+	if(fp == NULL)
+		return NULL;
+
+	if(feof(fp))
+		return NULL;
+
+	return fgets(buffer, bufferSize, fp);
+}
+
+
+void exitIfEmptyFile(FILE *file)
+{
+    long savedOffset = ftell(file);
+    fseek(file, 0, SEEK_END);
+
+    if (ftell(file) == 0)
+    {
+        fprintf(stderr, "\nInput file is empty.\n");
+        exit(1);
+    }
+    fseek(file, savedOffset, SEEK_SET);
+}
+