Function for updating quantity

2 files changed, 25 insertions, 5 deletions

diff --git a/interchange/ord.h b/interchange/ord.h
index 16c4e64..fa55da1 100644
--- a/interchange/ord.h
+++ b/interchange/ord.h
@@ -38,14 +38,25 @@ void interchange_ord_order(const char *sku,
 		void (*handler)(interchange_response *));
 
 /*!
+ * \brief For updating the quantity of an item in a cart.
+ * \param name The name given, in the cart, to the item.
+ * \param quantity The desired quantity.
+ * \param orderpage The order page, by default it's ord/basket.
+ * \param nextpage The page to expect response from, whatever the result is.
+ * \param parser Function for parsing the formatted response.
+ */
+void interchange_ord_update(const char *name, const unsigned int quantity,
+		const char *orderpage, const char *nextpage,
+		void (*parser)(interchange_response *));
+
+/*!
  * \brief For removing an item from a cart.
  * \param name The name given, in the cart, to the item.
  * \param orderpage The order page, by default it's ord/basket.
  * \param nextpage The page to expect response from, whatever the result is.
  * \param parser Function for parsing the formatted response.
  */
-void interchange_ord_remove(const char *name, const char *orderpage,
-		const char *nextpage, void (*parser)(interchange_response *));
+#define interchange_ord_remove(a, b, c, d) interchange_ord_update(a, 0, b, c, d)
 
 /*!
  * \brief For checking out items in the cart.
diff --git a/ord.c b/ord.c
index a3019e7..8ffe17c 100644
--- a/ord.c
+++ b/ord.c
@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "request.h"
@@ -11,13 +12,21 @@ void interchange_ord_order(const char *sku,
 	request(handler, NULL, NULL, "%s%s", "order?mv_arg=", sku);
 }
 
-void interchange_ord_remove(const char *name, const char *orderpage,
-		const char *nextpage, void (*parser)(interchange_response *))
+void interchange_ord_update(const char *name, const unsigned int quantity,
+		const char *orderpage, const char *nextpage,
+		void (*parser)(interchange_response *))
 {
+	size_t length = 0;
+	unsigned int qty = quantity;
+	do {
+		length++;
+	} while ((qty /= 10));
+	char qty_str[length + 1];
+	sprintf(qty_str, "%d", quantity);
 	request(parser, NULL, &(struct body){ 4 + (nextpage ? 1 : 0), {
 		{ "mv_quantity_update", "1" },
 		{ "mv_doit", "refresh" },
-		{ name, "0" },
+		{ name, qty_str },
 		{ "mv_orderpage", orderpage ? orderpage : "ord/basket" },
 		{ "mv_nextpage", nextpage }
 	}}, "%s", "process");