From d27f4fcc8261ce8ba82125537a5f4bec57058420 Mon Sep 17 00:00:00 2001
From: sorgelig <pour.garbage@gmail.com>
Date: Sat, 11 Apr 2020 19:47:33 +0800
Subject: [PATCH] common large load buffer.

---
 file_io.cpp                 | 1 +
 file_io.h                   | 1 +
 support/arcade/romutils.cpp | 8 ++++----
 support/neogeo/loader.cpp   | 8 ++++----
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/file_io.cpp b/file_io.cpp
index 58fe595..3511f73 100644
--- a/file_io.cpp
+++ b/file_io.cpp
@@ -41,6 +41,7 @@ static int iSelectedEntry = 0;       // selected entry index
 static int iFirstEntry = 0;
 
 static char full_path[2100];
+uint8_t loadbuf[LOADBUF_SZ];
 
 fileTYPE::fileTYPE()
 {
diff --git a/file_io.h b/file_io.h
index bcaef24..70c171f 100644
--- a/file_io.h
+++ b/file_io.h
@@ -113,6 +113,7 @@ const char *getFullPath(const char *name);
 uint32_t getFileType(const char *name);
 bool isMraName(char *path);
 
+#define LOADBUF_SZ (1024*1024)
 
 #define COEFF_DIR "filters"
 #define GAMMA_DIR "gamma"
diff --git a/support/arcade/romutils.cpp b/support/arcade/romutils.cpp
index 0718481..8d61667 100644
--- a/support/arcade/romutils.cpp
+++ b/support/arcade/romutils.cpp
@@ -191,10 +191,10 @@ static int rom_data(const uint8_t *buf, int chunk, int map, struct MD5Context *m
 	return 1;
 }
 
+extern uint8_t loadbuf[];
 static int rom_file(const char *name, uint32_t crc32, int start, int len, int map, struct MD5Context *md5context)
 {
 	fileTYPE f = {};
-	static uint8_t buf[4096];
 	if (!FileOpenZip(&f, name, crc32)) return 0;
 	if (start) FileSeek(&f, start, SEEK_SET);
 	unsigned long bytes2send = f.size - f.offset;
@@ -202,10 +202,10 @@ static int rom_file(const char *name, uint32_t crc32, int start, int len, int ma
 
 	while (bytes2send)
 	{
-		uint16_t chunk = (bytes2send > sizeof(buf)) ? sizeof(buf) : bytes2send;
+		uint32_t chunk = (bytes2send > LOADBUF_SZ) ? LOADBUF_SZ : bytes2send;
 
-		FileReadAdv(&f, buf, chunk);
-		if (!rom_data(buf, chunk, map, md5context))
+		FileReadAdv(&f, loadbuf, chunk);
+		if (!rom_data(loadbuf, chunk, map, md5context))
 		{
 			FileClose(&f);
 			return 0;
diff --git a/support/neogeo/loader.cpp b/support/neogeo/loader.cpp
index 28de896..8417421 100644
--- a/support/neogeo/loader.cpp
+++ b/support/neogeo/loader.cpp
@@ -223,7 +223,7 @@ static void make_path(const char *root, const char *name, char *path)
 	strcat(path, name);
 }
 
-static uint8_t loadbuf[1024 * 1024];
+extern uint8_t loadbuf[];
 static uint32_t load_crom_to_mem(const char* path, const char* name, uint8_t index, uint32_t offset, uint32_t size)
 {
 	fileTYPE f = {};
@@ -260,7 +260,7 @@ static uint32_t load_crom_to_mem(const char* path, const char* name, uint8_t ind
 	while (remain)
 	{
 		uint32_t partsz = remain;
-		if (partsz > 1024 * 1024) partsz = 1024 * 1024;
+		if (partsz > LOADBUF_SZ) partsz = LOADBUF_SZ;
 
 		//printf("partsz=%d, map_addr=0x%X\n", partsz, map_addr);
 		void *base = mmap(0, partsz, PROT_READ | PROT_WRITE, MAP_SHARED, memfd, map_addr);
@@ -335,10 +335,10 @@ static uint32_t load_rom_to_mem(const char* path, const char* name, uint8_t neo_
 	while (remain)
 	{
 		uint32_t partsz = remain;
-		if (partsz > 1024 * 1024) partsz = 1024 * 1024;
+		if (partsz > LOADBUF_SZ) partsz = LOADBUF_SZ;
 
 		uint32_t partszf = remainf;
-		if (partszf > 1024 * 1024) partszf = 1024 * 1024;
+		if (partszf > LOADBUF_SZ) partszf = LOADBUF_SZ;
 
 		//printf("partsz=%d, map_addr=0x%X\n", partsz, map_addr);
 		void *base = mmap(0, partsz, PROT_READ | PROT_WRITE, MAP_SHARED, memfd, map_addr);