MFC r262441-262442,262447,262461-262464,262655:

- Consistently pass around context information using a simple pointer.
  This fixes some dereferencing bugs in Chinese character set conversions.
- Fix Simplified Chinese character set conversions by switching around the
  fields of an internal struct so it corresponds with the way variables of
  this type are initialised.
- Fix an array index out of bounds bug in iconv VIQR (Vietnamese) module.
- Silence gcc warning about unsigned comparison with 0.

Also record r258316 and r258587 as merged so they no longer show up as
eligible.

PR:		185964
Submitted by:	Manuel Mausz <manuel-freebsd@mausz.at>

5 files changed, 20 insertions, 20 deletions

diff --git a/lib/libc/iconv/citrus_prop.c b/lib/libc/iconv/citrus_prop.c
index c2d4829..0e6d34a 100644
--- a/lib/libc/iconv/citrus_prop.c
+++ b/lib/libc/iconv/citrus_prop.c
@@ -339,7 +339,7 @@ name_found:
 
 static int
 _citrus_prop_parse_element(struct _memstream * __restrict ms,
-    const _citrus_prop_hint_t * __restrict hints, void ** __restrict context)
+    const _citrus_prop_hint_t * __restrict hints, void * __restrict context)
 {
 	int ch, errnum;
 #define _CITRUS_PROP_HINT_NAME_LEN_MAX	255
@@ -435,8 +435,7 @@ _citrus_prop_parse_variable(const _citrus_prop_hint_t * __restrict hints,
 		if (ch == EOF || ch == '\0')
 			break;
 		_memstream_ungetc(&ms, ch);
-		errnum = _citrus_prop_parse_element(
-		    &ms, hints, (void ** __restrict)context);
+		errnum = _citrus_prop_parse_element(&ms, hints, context);
 		if (errnum != 0)
 			return (errnum);
 	}
diff --git a/lib/libc/iconv/citrus_prop.h b/lib/libc/iconv/citrus_prop.h
index db087a4..2962154 100644
--- a/lib/libc/iconv/citrus_prop.h
+++ b/lib/libc/iconv/citrus_prop.h
@@ -42,7 +42,7 @@ typedef struct _citrus_prop_hint_t _citrus_prop_hint_t;
 
 #define _CITRUS_PROP_CB0_T(_func_, _type_) \
 typedef int (*_citrus_prop_##_func_##_cb_func_t) \
-    (void ** __restrict, const char *, _type_); \
+    (void * __restrict, const char *, _type_); \
 typedef struct { \
 	_citrus_prop_##_func_##_cb_func_t func; \
 } _citrus_prop_##_func_##_cb_t;
@@ -52,7 +52,7 @@ _CITRUS_PROP_CB0_T(str, const char *)
 
 #define _CITRUS_PROP_CB1_T(_func_, _type_) \
 typedef int (*_citrus_prop_##_func_##_cb_func_t) \
-    (void ** __restrict, const char *, _type_, _type_); \
+    (void * __restrict, const char *, _type_, _type_); \
 typedef struct { \
 	_citrus_prop_##_func_##_cb_func_t func; \
 } _citrus_prop_##_func_##_cb_t;
diff --git a/lib/libiconv_modules/BIG5/citrus_big5.c b/lib/libiconv_modules/BIG5/citrus_big5.c
index e79b162..d0e7047 100644
--- a/lib/libiconv_modules/BIG5/citrus_big5.c
+++ b/lib/libiconv_modules/BIG5/citrus_big5.c
@@ -172,7 +172,7 @@ _citrus_BIG5_check_excludes(_BIG5EncodingInfo *ei, wint_t c)
 }
 
 static int
-_citrus_BIG5_fill_rowcol(void ** __restrict ctx, const char * __restrict s,
+_citrus_BIG5_fill_rowcol(void * __restrict ctx, const char * __restrict s,
     uint64_t start, uint64_t end)
 {
 	_BIG5EncodingInfo *ei;
@@ -191,7 +191,7 @@ _citrus_BIG5_fill_rowcol(void ** __restrict ctx, const char * __restrict s,
 
 static int
 /*ARGSUSED*/
-_citrus_BIG5_fill_excludes(void ** __restrict ctx,
+_citrus_BIG5_fill_excludes(void * __restrict ctx,
     const char * __restrict s __unused, uint64_t start, uint64_t end)
 {
 	_BIG5EncodingInfo *ei;
@@ -237,7 +237,6 @@ static int
 _citrus_BIG5_encoding_module_init(_BIG5EncodingInfo * __restrict ei,
     const void * __restrict var, size_t lenvar)
 {
-	void *ctx = (void *)ei;
 	const char *s;
 	int err;
 
@@ -259,9 +258,9 @@ _citrus_BIG5_encoding_module_init(_BIG5EncodingInfo * __restrict ei,
 	}
 
 	/* fallback Big5-1984, for backward compatibility. */
-	_citrus_BIG5_fill_rowcol((void **)&ctx, "row", 0xA1, 0xFE);
-	_citrus_BIG5_fill_rowcol((void **)&ctx, "col", 0x40, 0x7E);
-	_citrus_BIG5_fill_rowcol((void **)&ctx, "col", 0xA1, 0xFE);
+	_citrus_BIG5_fill_rowcol(ei, "row", 0xA1, 0xFE);
+	_citrus_BIG5_fill_rowcol(ei, "col", 0x40, 0x7E);
+	_citrus_BIG5_fill_rowcol(ei, "col", 0xA1, 0xFE);
 
 	return (0);
 }
diff --git a/lib/libiconv_modules/HZ/citrus_hz.c b/lib/libiconv_modules/HZ/citrus_hz.c
index 6d0b6d8..f9eb006 100644
--- a/lib/libiconv_modules/HZ/citrus_hz.c
+++ b/lib/libiconv_modules/HZ/citrus_hz.c
@@ -65,8 +65,8 @@ typedef enum {
 } charset_t;
 
 typedef struct {
-	int	 end;
 	int	 start;
+	int	 end;
 	int	 width;
 } range_t;
 
@@ -505,12 +505,12 @@ _citrus_HZ_encoding_module_uninit(_HZEncodingInfo *ei)
 }
 
 static int
-_citrus_HZ_parse_char(void **context, const char *name __unused, const char *s)
+_citrus_HZ_parse_char(void *context, const char *name __unused, const char *s)
 {
 	escape_t *escape;
 	void **p;
 
-	p = (void **)*context;
+	p = (void **)context;
 	escape = (escape_t *)p[0];
 	if (escape->ch != '\0')
 		return (EINVAL);
@@ -522,14 +522,14 @@ _citrus_HZ_parse_char(void **context, const char *name __unused, const char *s)
 }
 
 static int
-_citrus_HZ_parse_graphic(void **context, const char *name, const char *s)
+_citrus_HZ_parse_graphic(void *context, const char *name, const char *s)
 {
 	_HZEncodingInfo *ei;
 	escape_t *escape;
 	graphic_t *graphic;
 	void **p;
 
-	p = (void **)*context;
+	p = (void **)context;
 	escape = (escape_t *)p[0];
 	ei = (_HZEncodingInfo *)p[1];
 	graphic = malloc(sizeof(*graphic));
@@ -591,13 +591,13 @@ _CITRUS_PROP_HINT_END
 };
 
 static int
-_citrus_HZ_parse_escape(void **context, const char *name, const char *s)
+_citrus_HZ_parse_escape(void *context, const char *name, const char *s)
 {
 	_HZEncodingInfo *ei;
 	escape_t *escape;
 	void *p[2];
 
-	ei = (_HZEncodingInfo *)*context;
+	ei = (_HZEncodingInfo *)context;
 	escape = malloc(sizeof(*escape));
 	if (escape == NULL)
 		return (EINVAL);
diff --git a/lib/libiconv_modules/VIQR/citrus_viqr.c b/lib/libiconv_modules/VIQR/citrus_viqr.c
index b8a881d..bcf2007 100644
--- a/lib/libiconv_modules/VIQR/citrus_viqr.c
+++ b/lib/libiconv_modules/VIQR/citrus_viqr.c
@@ -433,7 +433,6 @@ static int
 _citrus_VIQR_encoding_module_init(_VIQREncodingInfo * __restrict ei,
     const void * __restrict var __unused, size_t lenvar __unused)
 {
-	const mnemonic_def_t *p;
 	const char *s;
 	size_t i, n;
 	int errnum;
@@ -457,7 +456,10 @@ _citrus_VIQR_encoding_module_init(_VIQREncodingInfo * __restrict ei,
 			return (errnum);
 		}
 	}
-	for (i = 0;; ++i) {
+	/* a + 1 < b + 1 here to silence gcc warning about unsigned < 0. */
+	for (i = 0; i + 1 < mnemonic_ext_size + 1; ++i) {
+		const mnemonic_def_t *p;
+
 		p = &mnemonic_ext[i];
 		n = strlen(p->name);
 		if (ei->mb_cur_max < n)