Implemented the add-entry command

src/utils.c

@@ -427,3 +427,40 @@ Result format_size(uint64_t size, char** out_string) {
 	// Format the string
 	return format(out_string, "%.2f%s", value, unit);
 }
+
+Result parse_size(const char* string, uint64_t* out_size) {
+	// Parse the size
+	char* endptr;
+	uint64_t size = strtoull(string, &endptr, 10);
+
+	if (endptr == string) {
+		log_message(LOG_LEVEL_ERROR, "Failed to parse the size '%s'.", string);
+		return FAILURE;
+	}
+
+	// Determine the unit
+	if (*endptr == '\0') {
+		// No unit
+		*out_size = size;
+	} else if (strcmp(endptr, "K") == 0 || strcmp(endptr, "KB") == 0 || strcmp(endptr, "KiB") == 0) {
+		// Kilobytes
+		*out_size = size * 1024;
+	} else if (strcmp(endptr, "M") == 0 || strcmp(endptr, "MB") == 0 || strcmp(endptr, "MiB") == 0) {
+		// Megabytes
+		*out_size = size * 1024 * 1024;
+	} else if (strcmp(endptr, "G") == 0 || strcmp(endptr, "GB") == 0 || strcmp(endptr, "GiB") == 0) {
+		// Gigabytes
+		*out_size = size * 1024 * 1024 * 1024;
+	} else if (strcmp(endptr, "T") == 0 || strcmp(endptr, "TB") == 0 || strcmp(endptr, "TiB") == 0) {
+		// Terabytes
+		*out_size = size * 1024 * 1024 * 1024 * 1024;
+	} else if (strcmp(endptr, "P") == 0 || strcmp(endptr, "PB") == 0 || strcmp(endptr, "PiB") == 0) {
+		// Petabytes
+		*out_size = size * 1024 * 1024 * 1024 * 1024 * 1024;
+	} else {
+		log_message(LOG_LEVEL_ERROR, "Unknown unit '%s'.", endptr);
+		return FAILURE;
+	}
+
+	return SUCCESS;
+}