[Add] Basic commodity support. (Not in use yet).

.clang_complete

@@ -1,4 +1,5 @@
 -I /usr/include/SDL/
 -I /usr/include/freetype2/
+-I /usr/include/libxml2/
 -I lib/lua/
 

dat/commodity.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Commodities>
+	<commodity name="Food">
+		<high>160</high>
+		<medium>140</medium>
+		<low>120</low>
+	</commodity>
+	<commodity name="Ore">
+		<high>240</high>
+		<medium>210</medium>
+		<low>180</low>
+	</commodity>
+</Commodities>
+

src/economy.c

@@ -1,7 +1,24 @@
 #include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+
 #include "lephisto.h"
+#include "xml.h"
+#include "pack.h"
+#include "log.h"
 #include "economy.h"
 
+#define XML_COMMODITY_ID		"Commodities"	// XML section identifier.
+#define XML_COMMODITY_TAG		"commodity"
+#define COMMODITY_DATA			"../dat/commodity.xml"
+
+// Commodity stack.
+static Commodity* commodity_stack = NULL;
+static int commodity_nstack = 0;
+
+static void commodity_freeOne(Commodity* com);
+static Commodity* commodity_parse(xmlNodePtr parent);
+
 // Convert credits to a usable string for displaying.
 // str must have 10 characters allocated.
 void credits2str(char* str, unsigned int credits, int decimals) {
@@ -16,3 +33,89 @@ void credits2str(char* str, unsigned int credits, int decimals) {
 	else snprintf(str, 16, "%d", credits);
 }
 
+// Free a commodity.
+static void commodity_freeOne(Commodity* com) {
+	if(com->name) free(com->name);
+}
+
+static Commodity* commodity_parse(xmlNodePtr parent) {
+	xmlNodePtr node;
+	Commodity* tmp = CALLOC_L(Commodity);
+
+	tmp->name = (char*)xmlGetProp(parent, (xmlChar*)"name");
+	if(tmp->name == NULL)
+		WARN("Commodity from "COMMODITY_DATA" has invalid or noname");
+	
+	node = parent->xmlChildrenNode;
+
+	do {
+		if(xml_isNode(node, "high"))
+			tmp->high = xml_getInt(node);
+		else if(xml_isNode(node, "medium"))
+			tmp->medium = xml_getInt(node);
+		else if(xml_isNode(node, "low"))
+			tmp->low = xml_getInt(node);
+	} while((node = node->next));
+
+#define MELEMENT(o,s)if(o)WARN("Commodity '%s' missing '"s"' element",tmp->name)
+	MELEMENT(tmp->high==0, 		"high");
+	MELEMENT(tmp->medium==0, 	"medium");
+	MELEMENT(tmp->low==0, 		"low");
+#undef MELEMENT
+
+	return tmp;
+}
+
+int commodity_load(void) {
+	uint32_t bufsize;
+	char* buf = pack_readfile(DATA, COMMODITY_DATA, &bufsize);
+
+	xmlNodePtr node;
+	xmlDocPtr doc = xmlParseMemory(buf, bufsize);
+
+	Commodity* tmp = NULL;
+
+	node = doc->xmlChildrenNode; // Commoditys node.
+	if(strcmp((char*)node->name, XML_COMMODITY_ID)) {
+		ERR("Malformed "COMMODITY_DATA
+					" file: Missing root element '"XML_COMMODITY_ID"'");
+		return -1;
+	}
+
+	node = node->xmlChildrenNode; // First faction node.
+	if(node == NULL) {
+		ERR("Malformed "COMMODITY_DATA" file: does not contain elements");
+		return -1;
+	}
+
+	do {
+		if(node->type == XML_NODE_START) {
+			if(strcmp((char*)node->name, XML_COMMODITY_TAG)==0) {
+				tmp = commodity_parse(node);
+				commodity_stack = realloc(commodity_stack,
+							sizeof(Commodity)*(++commodity_nstack));
+				memcpy(commodity_stack+commodity_nstack-1, tmp, sizeof(Commodity));
+				free(tmp);
+			}
+		}
+	} while((node = node->next));
+
+	xmlFreeDoc(doc);
+	free(buf);
+	xmlCleanupParser();
+
+	DEBUG("Loaded %d commodit%s",
+				commodity_nstack, (commodity_nstack==1) ? "y" : "ies");
+
+	return 0;
+}
+
+void commodity_free(void) {
+	int i;
+	for(i = 0; i < commodity_nstack; i++)
+		commodity_freeOne(&commodity_stack[i]);
+	free(commodity_stack);
+	commodity_stack = NULL;
+	commodity_nstack = 0;
+}
+

src/economy.h

@@ -1,4 +1,15 @@
 #pragma once
 
+typedef struct Commodity_ {
+	char* name;
+	int low, medium, high; // Prices.
+} Commodity;
+
+// Commidity stuff.
+Commodity* commodity_get(const char* name);
+int commodity_load(void);
+void commodity_free(void);
+
+// Misc.
 void credits2str(char* str, unsigned int credits, int decimals);
 

src/lephisto.c

@@ -25,6 +25,7 @@
 #include "pilot.h"
 #include "sound.h"
 #include "spfx.h"
+#include "economy.h"
 #include "music.h"
 
 #define XML_START_ID    "Start"
@@ -151,6 +152,7 @@ int main(int argc, char** argv) {
   toolkit_init(); // Init the toolkit.
 
   // Data loading.
+	commodity_load();
   factions_load();
 	spfx_load();
   outfit_load();
@@ -209,9 +211,9 @@ int main(int argc, char** argv) {
   outfit_free();
 	spfx_free(); 		// Remove the special effects.
   factions_free();
-  gl_freeFont(&gl_smallFont);
-
+	commodity_free();
   gl_freeFont(NULL);
+	gl_freeFont(&gl_smallFont);
 
   // Exit subsystems.
   toolkit_exit();   // Kill the toolkit.