From 7f59757eea364f99c34e3a3efdbf628a9bffa5d8 Mon Sep 17 00:00:00 2001
From: TheLastRar <TheLastRar@users.noreply.github.com>
Date: Wed, 18 Dec 2024 21:43:52 +0000
Subject: [PATCH] 3rdparty/libchdr: Purge almost all remaining patches

Leaving only the chd_read_header_* functions, of which exists an equivalent in later libchdr versions
---
 3rdparty/libchdr/include/libchdr/cdrom.h | 26 ++++++++-------------
 3rdparty/libchdr/include/libchdr/chd.h   |  2 +-
 3rdparty/libchdr/src/libchdr_cdrom.c     | 29 ------------------------
 3rdparty/libchdr/src/libchdr_chd.c       |  3 +--
 4 files changed, 11 insertions(+), 49 deletions(-)

diff --git a/3rdparty/libchdr/include/libchdr/cdrom.h b/3rdparty/libchdr/include/libchdr/cdrom.h
index 0e978473e6..816e6a5c4f 100644
--- a/3rdparty/libchdr/include/libchdr/cdrom.h
+++ b/3rdparty/libchdr/include/libchdr/cdrom.h
@@ -10,12 +10,10 @@
 
 #pragma once
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#ifndef __CDROM_H__
+#define __CDROM_H__
 
 #include <stdint.h>
-#include <stdbool.h>
 #include <libchdr/chdconfig.h>
 
 /***************************************************************************
@@ -49,15 +47,11 @@ enum
 
 enum
 {
-	CD_SUB_NONE = 0,            /* no subcode data stored */
-	CD_SUB_RAW_INTERLEAVED,     /* raw interleaved 96 bytes per sector */
-	CD_SUB_RAW,                 /* raw non-interleaved 96 bytes per sector */
+	CD_SUB_NORMAL = 0,          /* "cooked" 96 bytes per sector */
+	CD_SUB_RAW,                 /* raw uninterleaved 96 bytes per sector */
+	CD_SUB_NONE                 /* no subcode data stored */
 };
 
-const char* cdrom_get_subtype_string(uint32_t subtype);
-bool cdrom_parse_subtype_string(const char* typestring, uint32_t* subtype, uint32_t* subsize);
-
-
 #define CD_FLAG_GDROM   0x00000001  /* disc is a GD-ROM, all tracks should be stored with GD-ROM metadata */
 #define CD_FLAG_GDROMLE 0x00000002  /* legacy GD-ROM, with little-endian CDDA data */
 
@@ -87,10 +81,10 @@ static inline uint32_t lba_to_msf(uint32_t lba)
 {
 	uint8_t m, s, f;
 
-	m = (uint8_t)(lba / (60 * 75));
+	m = lba / (60 * 75);
 	lba -= m * (60 * 75);
-	s = (uint8_t)(lba / 75);
-	f = (uint8_t)(lba % 75);
+	s = lba / 75;
+	f = lba % 75;
 
 	return ((m / 10) << 20) | ((m % 10) << 16) |
 			((s / 10) << 12) | ((s % 10) <<  8) |
@@ -113,6 +107,4 @@ static inline uint32_t lba_to_msf_alt(int lba)
 	return ret;
 }
 
-#ifdef __cplusplus
-} // extern "C"
-#endif
\ No newline at end of file
+#endif  /* __CDROM_H__ */
diff --git a/3rdparty/libchdr/include/libchdr/chd.h b/3rdparty/libchdr/include/libchdr/chd.h
index f4b7aae0f8..e13dca03a4 100644
--- a/3rdparty/libchdr/include/libchdr/chd.h
+++ b/3rdparty/libchdr/include/libchdr/chd.h
@@ -48,7 +48,6 @@ extern "C" {
 
 #include <libchdr/coretypes.h>
 #include <libchdr/chdconfig.h>
-#include <stdbool.h>
 
 /***************************************************************************
 
@@ -393,6 +392,7 @@ CHD_EXPORT core_file *chd_core_file(chd_file *chd);
 CHD_EXPORT const char *chd_error_string(chd_error err);
 
 
+
 /* ----- CHD header management ----- */
 
 /* return a pointer to the extracted CHD header data */
diff --git a/3rdparty/libchdr/src/libchdr_cdrom.c b/3rdparty/libchdr/src/libchdr_cdrom.c
index aa06b49247..112ea2e147 100644
--- a/3rdparty/libchdr/src/libchdr_cdrom.c
+++ b/3rdparty/libchdr/src/libchdr_cdrom.c
@@ -20,35 +20,6 @@
 
 #include <libchdr/cdrom.h>
 
-const char* cdrom_get_subtype_string(uint32_t subtype)
-{
-	switch (subtype)
-	{
-	case CD_SUB_RAW:              return "RW";
-	case CD_SUB_RAW_INTERLEAVED:  return "RW_RAW";
-	default:                      return "NONE";
-	}
-}
-
-bool cdrom_parse_subtype_string(const char* typestring, uint32_t* subtype, uint32_t* subsize)
-{
-	// https://github.com/mamedev/mame/blob/d2d54fb8ed53a2e86d308067da8414f85b5929b0/src/lib/util/cdrom.cpp#L767
-  if (!strcmp(typestring, "RW"))
-  {
-    *subtype = CD_SUB_RAW;
-    *subsize = 96;
-		return true;
-  }
-  else if (!strcmp(typestring, "RW_RAW"))
-  {
-    *subtype = CD_SUB_RAW_INTERLEAVED;
-    *subsize = 96;
-		return true;
-  }
-
-	return false;
-}
-
 #ifdef WANT_RAW_DATA_SECTOR
 
 /***************************************************************************
diff --git a/3rdparty/libchdr/src/libchdr_chd.c b/3rdparty/libchdr/src/libchdr_chd.c
index 97c0632008..ec37a490dc 100644
--- a/3rdparty/libchdr/src/libchdr_chd.c
+++ b/3rdparty/libchdr/src/libchdr_chd.c
@@ -42,7 +42,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
-#include <limits.h>
 
 #include <libchdr/chd.h>
 #include <libchdr/cdrom.h>
@@ -1951,7 +1950,7 @@ cleanup:
     memory
 -------------------------------------------------*/
 
-CHD_EXPORT chd_error chd_precache(chd_file* chd)
+CHD_EXPORT chd_error chd_precache(chd_file *chd)
 {
 	INT64 count;
 	UINT64 size;