1 files changed, 39 insertions, 0 deletions
diff --git a/common/readline.c b/common/readline.c
new file mode 100644
index 00000000..e75b183f
--- /dev/null
+++ b/common/readline.c
@@ -0,0 +1,39 @@
+#include "readline.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+char *read_line(FILE *file) {
+	int length = 0, size = 128;
+	char *string = malloc(size);
+	if (!string) {
+		return NULL;
+	}
+	while (1) {
+		int c = getc(file);
+		if (c == EOF || c == '\n' || c == '\0') {
+			break;
+		}
+		if (c == '\r') {
+			continue;
+		}
+		if (length == size) {
+			char *new_string = realloc(string, size *= 2);
+			if (!new_string) {
+				free(string);
+				return NULL;
+			}
+			string = new_string;
+		}
+		string[length++] = c;
+	}
+	if (length + 1 == size) {
+		char *new_string = realloc(string, length + 1);
+		if (!new_string) {
+			free(string);
+			return NULL;
+		}
+		string = new_string;
+	}
+	string[length] = '\0';
+	return string;
+}