[Decompilation] Add a separate segment type

At least wherever Turbo C++ and master.lib want us to use a
non-pointer, since both use uint16_t for segment values throughout
their APIs instead of the more sensible void __seg*. Maybe, integer
arithmetic on segment values was widely considered more important than
dereferencing?

platform.h

@@ -23,3 +23,9 @@ typedef unsigned long uint32_t;
 # error This code can currently only be compiled on Borland's 16-bit DOS compilers. Ideally, you'd only have to declare <stdint.h> types for your compiler here though?
 #endif
 /// ----------
+
+// Both Turbo C++ and master.lib use uint16_t for segment values throughout
+// their APIs instead of the more sensible void __seg*. Maybe, integer
+// arithmetic on segment values was widely considered more important than
+// dereferencing?
+typedef uint16_t seg_t;

th01/mdrv2.c

@@ -8,6 +8,7 @@
 #include <io.h>
 #include <malloc.h>
 #include <string.h>
+#include "platform.h"
 
 #define	MDRV2 0xf2
 #define MDRV2_CALL(func) { \
@@ -54,7 +55,7 @@ static void near pascal mdrv2_load(const char *fn, char func)
 	if(mdrv2_have_board) {
 		int handle = open(fn, O_BINARY | O_RDONLY);
 		int length = filelength(handle);
-		int sgm;
+		seg_t sgm;
 		int ofs;
 		void far *block;
 

th01/resstuff.c

@@ -14,7 +14,7 @@ void resident_stuff_set(
 	char rank, char bgm_mode, char bombs, char start_lives_extra, long rand
 )
 {
-	unsigned res = resdata_exist(res_id, RES_ID_STRLEN, RES_PARASIZE);
+	seg_t res = resdata_exist(res_id, RES_ID_STRLEN, RES_PARASIZE);
 	if(!res) {
 		res = resdata_create(res_id, RES_ID_STRLEN, RES_PARASIZE);
 		reiidenconfig = MK_FP(res, 0);
@@ -42,7 +42,7 @@ int resident_stuff_get(
 	int *stage
 )
 {
-	unsigned res = resdata_exist(res_id, RES_ID_STRLEN, RES_PARASIZE);
+	seg_t res = resdata_exist(res_id, RES_ID_STRLEN, RES_PARASIZE);
 	if(res) {
 		reiidenconfig = MK_FP(res, 0);
 		*rank = reiidenconfig->rank;
@@ -59,7 +59,7 @@ int resident_stuff_get(
 
 void resident_free(void)
 {
-	unsigned res = resdata_exist(res_id, RES_ID_STRLEN, RES_PARASIZE);
+	seg_t res = resdata_exist(res_id, RES_ID_STRLEN, RES_PARASIZE);
 	if(res) {
 		resdata_free(res);
 	}

th02/maine_03.c

@@ -20,7 +20,7 @@ int unused_6;
 
 int pascal cfg_load(void)
 {
-	int resident_sgm;
+	seg_t resident_sgm;
 
 	file_ropen(CFG_FN);
 	file_seek(offsetof(huuma_cfg_t, resident_sgm), 0);

th02/op_01.c

@@ -20,7 +20,7 @@ char snd_bgm_mode;
 static int unused_2;
 unsigned int idle_frames;
 unsigned char demo_num;
-unsigned int mikoconfig_sgm;
+void __seg *mikoconfig_sgm;
 putfunc_t near *putfunc;
 
 // No, we don't want to put these two into th02.h. Apparently, declaring

th02/th02.h

@@ -215,7 +215,7 @@ typedef struct {
 
 typedef struct {
 	huuma_options_t opts;
-	int resident_sgm;
+	void __seg *resident_sgm;
 	int8_t debug;
 } huuma_cfg_t;
 #pragma option -a.

th02/zun_res1.c

@@ -13,7 +13,7 @@
 
 char debug = 0;
 
-void cfg_write(int mikoconfig_sgm)
+void cfg_write(seg_t mikoconfig_sgm)
 {
 	static const huuma_options_t opts_default = {
 		RANK_NORMAL, SND_BGM_FM, 3, 2, 0
@@ -58,7 +58,7 @@ int main(int argc, const char **argv)
 	static const char INITIALIZED[] =
 		"それでは、よろしくお願いします\n\n";
 
-	int sgm;
+	seg_t sgm;
 	const char *res_id = MIKOConfig;
 	int i;
 	char far *mikoconfig;

th04/ems.h

@@ -1 +1 @@
-extern unsigned int Ems; /* ZUN symbol [MAGNet2010] */
+extern seg_t Ems; /* ZUN symbol [MAGNet2010] */

th04/formats/bb_stage.c

@@ -19,7 +19,7 @@ void pascal far bb_stage_free(void)
 #endif
 {
 	if(bb_stage_seg) {
-		hmem_free((unsigned int)bb_stage_seg);
+		hmem_free((seg_t)bb_stage_seg);
 		bb_stage_seg = 0;
 	}
 }