From fb44227179cd8d0dbaaf694fba2d4861106add75 Mon Sep 17 00:00:00 2001
From: Owen Shepherd <owen.shepherd@e43.eu>
Date: Mon, 31 Dec 2012 20:34:22 +0000
Subject: [PATCH] PDCLIB-2 PDCLIB-9: MB_CUR_MAX macro and implementation

---
 functions/locale/_PDCLIB_mb_cur_max.c | 27 +++++++++++++++++++++++++++
 includes/stdlib.h                     |  5 +++++
 internals/_PDCLIB_encoding.h          |  2 ++
 internals/_PDCLIB_int.h               |  2 ++
 opt/basecodecs/_PDCLIB_ascii.c        |  1 +
 opt/basecodecs/_PDCLIB_latin1.c       |  1 +
 opt/basecodecs/_PDCLIB_utf8.c         |  1 +
 7 files changed, 39 insertions(+)
 create mode 100644 functions/locale/_PDCLIB_mb_cur_max.c

diff --git a/functions/locale/_PDCLIB_mb_cur_max.c b/functions/locale/_PDCLIB_mb_cur_max.c
new file mode 100644
index 0000000..a5f459d
--- /dev/null
+++ b/functions/locale/_PDCLIB_mb_cur_max.c
@@ -0,0 +1,27 @@
+/* _PDCLIB_mb_cur_max( void ) 
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <locale.h>
+#ifndef REGTEST
+#include <_PDCLIB_locale.h>
+#include <_PDCLIB_encoding.h>
+
+size_t _PDCLIB_mb_cur_max( void )
+{
+    return _PDCLIB_threadlocale()->_Codec->__mb_max;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    TESTCASE( NO_TESTDRIVER );
+    return TEST_RESULTS;
+}
+#endif
diff --git a/includes/stdlib.h b/includes/stdlib.h
index 22cc80c..1151d1a 100644
--- a/includes/stdlib.h
+++ b/includes/stdlib.h
@@ -21,6 +21,11 @@ typedef _PDCLIB_size_t size_t;
 #define NULL _PDCLIB_NULL
 #endif
 
+#ifndef _PDCLIB_MB_CUR_MAX_DEFINED
+#define _PDCLIB_MB_CUR_MAX_DEFINED
+#define MB_CUR_MAX (_PDCLIB_mb_cur_max())
+#endif
+
 /* Numeric conversion functions */
 
 /* TODO: atof(), strtof(), strtod(), strtold() */
diff --git a/internals/_PDCLIB_encoding.h b/internals/_PDCLIB_encoding.h
index f53d77a..9b31735 100644
--- a/internals/_PDCLIB_encoding.h
+++ b/internals/_PDCLIB_encoding.h
@@ -138,6 +138,8 @@ struct _PDCLIB_charcodec {
         _PDCLIB_size_t                           *_PDCLIB_restrict  _P_insz,
         _PDCLIB_mbstate_t                        *_PDCLIB_restrict  _P_ps
     );
+
+    size_t __mb_max;
 };
 
 #endif
diff --git a/internals/_PDCLIB_int.h b/internals/_PDCLIB_int.h
index c9988a9..52ba8b3 100644
--- a/internals/_PDCLIB_int.h
+++ b/internals/_PDCLIB_int.h
@@ -364,6 +364,8 @@ typedef struct _PDCLIB_charcodec *_PDCLIB_charcodec_t;
 typedef struct _PDCLIB_locale    *_PDCLIB_locale_t;
 typedef struct lconv              _PDCLIB_lconv_t;
 
+_PDCLIB_size_t _PDCLIB_mb_cur_max( void );
+
 /* -------------------------------------------------------------------------- */
 /* stdio                                                                      */
 /* -------------------------------------------------------------------------- */
diff --git a/opt/basecodecs/_PDCLIB_ascii.c b/opt/basecodecs/_PDCLIB_ascii.c
index 86001af..e07e2ba 100644
--- a/opt/basecodecs/_PDCLIB_ascii.c
+++ b/opt/basecodecs/_PDCLIB_ascii.c
@@ -62,6 +62,7 @@ static bool c32toascii(
 struct _PDCLIB_charcodec _PDCLIB_ascii_codec = {
     .__mbstoc32s = asciitoc32,
     .__c32stombs = c32toascii,
+    .__mb_max    = 1,
 };
 
 #endif
diff --git a/opt/basecodecs/_PDCLIB_latin1.c b/opt/basecodecs/_PDCLIB_latin1.c
index b397001..72a3446 100644
--- a/opt/basecodecs/_PDCLIB_latin1.c
+++ b/opt/basecodecs/_PDCLIB_latin1.c
@@ -60,6 +60,7 @@ static bool c32tolatin1(
 struct _PDCLIB_charcodec _PDCLIB_latin1_codec = {
     .__mbstoc32s = latin1toc32,
     .__c32stombs = c32tolatin1,
+    .__mb_max    = 1,
 };
 
 #endif
diff --git a/opt/basecodecs/_PDCLIB_utf8.c b/opt/basecodecs/_PDCLIB_utf8.c
index 2b3f4f6..bac0e82 100644
--- a/opt/basecodecs/_PDCLIB_utf8.c
+++ b/opt/basecodecs/_PDCLIB_utf8.c
@@ -231,6 +231,7 @@ static bool c32toutf8(
 struct _PDCLIB_charcodec _PDCLIB_utf8_codec = {
     .__mbstoc32s = utf8toc32,
     .__c32stombs = c32toutf8,
+    .__mb_max    = 4,
 };
 
 #endif
-- 
2.40.0