Address emersion's feedback on peek_line

common/readline.c

@@ -49,11 +49,11 @@ char *read_line(FILE *file) {
 	return string;
 }
 
-char *peek_line(FILE *file, int offset, long *position) {
+char *peek_line(FILE *file, int line_offset, long *position) {
 	long pos = ftell(file);
-	size_t length = 1;
+	size_t length = 0;
-	char *line = calloc(1, length);
+	char *line = NULL;
-	for (int i = 0; i <= offset; i++) {
+	for (int i = 0; i <= line_offset; i++) {
 		ssize_t read = getline(&line, &length, file);
 		if (read < 0) {
 			break;

include/readline.h

@@ -4,7 +4,7 @@
 #include <stdio.h>
 
 char *read_line(FILE *file);
-char *peek_line(FILE *file, int offset, long *position);
+char *peek_line(FILE *file, int line_offset, long *position);
 char *read_line_buffer(FILE *file, char *string, size_t string_len);
 
 #endif