From 0751b55f611b889f63dfc2bc2705e7537703cb43 Mon Sep 17 00:00:00 2001
From: gonzo <gonzo@toniatuh.com>
Date: Fri, 19 May 2023 22:17:58 +0200
Subject: added loan struct to abstract over loan types

---
 Makefile | 10 +++++-----
 loans.c  | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 loans.h  | 19 +++++++++++++++++++
 3 files changed, 72 insertions(+), 5 deletions(-)
 create mode 100644 loans.c

diff --git a/Makefile b/Makefile
index d3a30d0..14f15ab 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,14 @@
 UNAME := $$( uname -s )
 
 .if ${UNAME} == "Linux"
-CC=clang --std=gnu99
+CC=clang --std=gnu11
 .else
-CC=clang --std=c99
+CC=clang --std=c11
 .endif
 AR=ar ruvcs
 
-CFLAGS=-Wall -Wextra -Werror -Weverything -Wpadded -pedantic
-LIBS=-lncurses -lm
+CFLAGS=-Wall -Wextra -Werror -Weverything -pedantic
+LIBS=-lform -lncurses -lm
 BLDFLAGS=-g
 RELFLAGS=-O2
 
@@ -18,7 +18,7 @@ HEAD=
 OBJ=${DEPS:.c=.o}
 
 LIB=las.a
-LDEPS=bullet_loan.c straight_line_loan.c mortgage_loan.c
+LDEPS=bullet_loan.c straight_line_loan.c mortgage_loan.c loans.c
 LHEAD=contract.h loans.h
 LOBJ=${LDEPS:.c=.o}
 
diff --git a/loans.c b/loans.c
new file mode 100644
index 0000000..f812aaf
--- /dev/null
+++ b/loans.c
@@ -0,0 +1,48 @@
+#include "loans.h"
+#include "stdio.h"
+
+loan loan_init(loan_type type, int n, int d, float r, float P) {
+	loan ret;
+	ret.type = type;
+
+	switch (type) {
+	case BULLET:
+		ret.c = bullet_init(n, d, r, P);
+		break;
+	case STRAIGHTLINE:
+		ret.c = sl_init(n, d, r, P);
+		break;
+	case MORTGAGE:
+		ret.c = mort_init(n, d, r, P);
+		break;
+	}
+
+	return ret;
+}
+
+float loan_update(loan l) {
+	switch (l.type) {
+	case BULLET:
+		return bullet_update(l.c);
+	case STRAIGHTLINE:
+		return sl_update(l.c);
+	case MORTGAGE:
+		return mort_update(l.c);
+	}
+	perror("Unkown Loan type supplied!");
+	exit(EXIT_FAILURE);
+}
+
+void loan_free(loan l) {
+	switch (l.type) {
+	case BULLET:
+		bullet_free(l.c);
+		break;
+	case STRAIGHTLINE:
+		sl_free(l.c);
+		break;
+	case MORTGAGE:
+		mort_free(l.c);
+		break;
+	}
+}
diff --git a/loans.h b/loans.h
index fd276ae..88bbb41 100644
--- a/loans.h
+++ b/loans.h
@@ -3,6 +3,20 @@
 #include <math.h>
 #include "contract.h"
 
+typedef enum loan_type {
+	BULLET,
+	STRAIGHTLINE,
+	MORTGAGE,
+} loan_type;
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpadded"
+typedef struct loan {
+	loan_type type;
+	contract *c;
+} loan;
+#pragma clang diagnostic pop
+
 /**** BULLET LOAN ****/
 contract *bullet_init(int n, int d, float r, float P);
 float bullet_update(contract *);
@@ -17,3 +31,8 @@ void sl_free(contract *);
 contract *mort_init(int n, int d, float r, float P);
 float mort_update(contract *);
 void mort_free(contract *);
+
+/**** GENERAL LOAN STUFF ****/
+loan loan_init(loan_type type, int n, int d, float r, float P);
+float loan_update(loan);
+void loan_free(loan);
-- 
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