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gvalue: Add explicitly signed g_value_get_schar() and g_value_set_schar()

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The documentation for G_TYPE_CHAR says:

"The type designated by G_TYPE_CHAR is unconditionally an 8-bit signed
 integer."

However the return value for g_value_get_char() was just "char" which
in C has an unspecified signedness; on e.g. x86 it's signed (which
matches the GType), but on e.g. PowerPC or ARM, it's not.

We can't break the old API, so we need to suck it up and add new API.
Port most internal users, but keep some tests of the old API too.

https://bugzilla.gnome.org/show_bug.cgi?id=659870
This commit is contained in:
Colin Walters 2011-09-22 16:08:35 -04:00
parent 1df8160fa6
commit f42fe6cdc0
11 changed files with 83 additions and 12 deletions
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4
gio/gsettings-mapping.c
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@ -346,7 +346,7 @@ g_settings_set_mapping (const GValue *value,
if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_BYTE))
{
if (G_VALUE_HOLDS_CHAR (value))
return g_variant_new_byte (g_value_get_char (value));
return g_variant_new_byte (g_value_get_schar (value));
else
return g_variant_new_byte (g_value_get_uchar (value));
}
@ -453,7 +453,7 @@ g_settings_get_mapping (GValue *value,
if (G_VALUE_HOLDS_UCHAR (value))
g_value_set_uchar (value, g_variant_get_byte (variant));
else if (G_VALUE_HOLDS_CHAR (value))
g_value_set_char (value, (gchar) g_variant_get_byte (variant));
g_value_set_schar (value, (gint8)g_variant_get_byte (variant));
else
return FALSE;
return TRUE;

6
gio/tests/gsettings.c
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@ -718,7 +718,7 @@ typedef struct
gboolean bool_prop;
gboolean anti_bool_prop;
gchar byte_prop;
gint8 byte_prop;
gint int16_prop;
guint16 uint16_prop;
gint int_prop;
@ -771,7 +771,7 @@ test_object_get_property (GObject *object,
g_value_set_boolean (value, test_object->anti_bool_prop);
break;
case PROP_BYTE:
g_value_set_char (value, test_object->byte_prop);
g_value_set_schar (value, test_object->byte_prop);
break;
case PROP_UINT16:
g_value_set_uint (value, test_object->uint16_prop);
@ -829,7 +829,7 @@ test_object_set_property (GObject *object,
test_object->anti_bool_prop = g_value_get_boolean (value);
break;
case PROP_BYTE:
test_object->byte_prop = g_value_get_char (value);
test_object->byte_prop = g_value_get_schar (value);
break;
case PROP_INT16:
test_object->int16_prop = g_value_get_int (value);

2
gobject/gclosure.c
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@ -1029,7 +1029,7 @@ value_from_ffi_type (GValue *gvalue, gpointer *value)
g_value_set_string (gvalue, *(gchar**)value);
break;
case G_TYPE_CHAR:
g_value_set_char (gvalue, *(gchar*)value);
g_value_set_schar (gvalue, *(gint8*)value);
break;
case G_TYPE_UCHAR:
g_value_set_uchar (gvalue, *(guchar*)value);

2
gobject/glib-genmarshal.c
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@ -134,7 +134,7 @@ put_marshal_value_getters (void)
fputs ("\n", fout);
fputs ("#ifdef G_ENABLE_DEBUG\n", fout);
fputs ("#define g_marshal_value_peek_boolean(v) g_value_get_boolean (v)\n", fout);
fputs ("#define g_marshal_value_peek_char(v) g_value_get_char (v)\n", fout);
fputs ("#define g_marshal_value_peek_char(v) g_value_get_schar (v)\n", fout);
fputs ("#define g_marshal_value_peek_uchar(v) g_value_get_uchar (v)\n", fout);
fputs ("#define g_marshal_value_peek_int(v) g_value_get_int (v)\n", fout);
fputs ("#define g_marshal_value_peek_uint(v) g_value_get_uint (v)\n", fout);

2
gobject/gmarshal.c
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@ -8,7 +8,7 @@
#ifdef G_ENABLE_DEBUG
#define g_marshal_value_peek_boolean(v) g_value_get_boolean (v)
#define g_marshal_value_peek_char(v) g_value_get_char (v)
#define g_marshal_value_peek_char(v) g_value_get_schar (v)
#define g_marshal_value_peek_uchar(v) g_value_get_uchar (v)
#define g_marshal_value_peek_int(v) g_value_get_int (v)
#define g_marshal_value_peek_uint(v) g_value_get_uint (v)

2
gobject/gobject.symbols
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@ -218,6 +218,7 @@ g_value_set_int64
g_value_set_long
g_value_set_pointer
g_value_set_static_string
g_value_set_schar
g_value_set_string
g_value_set_string_take_ownership
g_value_set_uchar
@ -233,6 +234,7 @@ g_value_get_int
g_value_get_int64
g_value_get_long
g_value_get_pointer
g_value_get_schar
g_value_get_string
g_value_get_uchar
g_value_get_uint

40
gobject/gvaluetypes.c
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@ -636,6 +636,7 @@ _g_value_types_init (void)
* @v_char: character value to be set
*
* Set the contents of a %G_TYPE_CHAR #GValue to @v_char.
* Deprecated: 2.32: This function's input type is broken, see g_value_set_schar()
*/
void
g_value_set_char (GValue *value,
@ -650,9 +651,13 @@ g_value_set_char (GValue *value,
* g_value_get_char:
* @value: a valid #GValue of type %G_TYPE_CHAR
*
* Do not use this function; it is broken on platforms where the %char
* type is unsigned, such as ARM and PowerPC. See g_value_get_schar().
*
* Get the contents of a %G_TYPE_CHAR #GValue.
*
* Returns: character contents of @value
* Deprecated: 2.32: This function's return type is broken, see g_value_get_schar()
*/
gchar
g_value_get_char (const GValue *value)
@ -662,6 +667,41 @@ g_value_get_char (const GValue *value)
return value->data[0].v_int;
}
/**
* g_value_set_schar:
* @value: a valid #GValue of type %G_TYPE_CHAR
* @v_char: signed 8 bit integer to be set
*
* Set the contents of a %G_TYPE_CHAR #GValue to @v_char.
*
* Since: 2.32
*/
void
g_value_set_schar (GValue *value,
gint8 v_char)
{
g_return_if_fail (G_VALUE_HOLDS_CHAR (value));
value->data[0].v_int = v_char;
}
/**
* g_value_get_schar:
* @value: a valid #GValue of type %G_TYPE_CHAR
*
* Get the contents of a %G_TYPE_CHAR #GValue.
*
* Returns: signed 8 bit integer contents of @value
* Since: 2.32
*/
gint8
g_value_get_schar (const GValue *value)
{
g_return_val_if_fail (G_VALUE_HOLDS_CHAR (value), 0);
return value->data[0].v_int;
}
/**
* g_value_set_uchar:
* @value: a valid #GValue of type %G_TYPE_UCHAR

5
gobject/gvaluetypes.h
View File

@ -177,9 +177,14 @@ G_BEGIN_DECLS
/* --- prototypes --- */
#ifndef G_DISABLE_DEPRECATED
void g_value_set_char (GValue *value,
gchar v_char);
gchar g_value_get_char (const GValue *value);
#endif
void g_value_set_schar (GValue *value,
gint8 v_char);
gint8 g_value_get_schar (const GValue *value);
void g_value_set_uchar (GValue *value,
guchar v_uchar);
guchar g_value_get_uchar (const GValue *value);

13
gobject/tests/param.c
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@ -145,8 +145,15 @@ test_value_transform (void)
g_value_unset (&src); \
g_value_unset (&dest);
CHECK_INT_CONVERSION(G_TYPE_CHAR, char, -124)
/* Keep a check for an integer in the range of 0-127 so we're
* still testing g_value_get_char(). See
* https://bugzilla.gnome.org/show_bug.cgi?id=659870
* for why it is broken.
*/
CHECK_INT_CONVERSION(G_TYPE_CHAR, char, 124)
CHECK_INT_CONVERSION(G_TYPE_CHAR, schar, -124)
CHECK_INT_CONVERSION(G_TYPE_CHAR, schar, 124)
CHECK_INT_CONVERSION(G_TYPE_UCHAR, uchar, 0)
CHECK_INT_CONVERSION(G_TYPE_UCHAR, uchar, 255)
CHECK_INT_CONVERSION(G_TYPE_INT, int, -12345)
@ -378,9 +385,9 @@ test_value_transform (void)
g_value_init (&src, G_TYPE_STRING);
g_value_init (&dest, G_TYPE_CHAR);
g_value_set_static_string (&src, "bla");
g_value_set_char (&dest, 'c');
g_value_set_schar (&dest, 'c');
g_assert (!g_value_transform (&src, &dest));
g_assert_cmpint (g_value_get_char (&dest), ==, 'c');
g_assert_cmpint (g_value_get_schar (&dest), ==, 'c');
g_value_unset (&src);
g_value_unset (&dest);
}

1
tests/gobject/gvalue-test.c
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@ -50,6 +50,7 @@ test_enum_transformation (void)
g_value_init (&xform, G_TYPE_CHAR);
g_value_transform (&orig, &xform);
g_assert (g_value_get_char (&xform) == 1);
g_assert (g_value_get_schar (&xform) == 1);
memset (&xform, 0, sizeof (GValue));
g_value_init (&xform, G_TYPE_UCHAR);

16
tests/gobject/paramspec-test.c
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@ -67,6 +67,22 @@ test_param_spec_char (void)
modified = g_param_value_validate (pspec, &value);
g_assert (modified && g_value_get_char (&value) == 40);
g_value_set_schar (&value, 0);
modified = g_param_value_validate (pspec, &value);
g_assert (modified && g_value_get_schar (&value) == 20);
g_value_set_schar (&value, 20);
modified = g_param_value_validate (pspec, &value);
g_assert (!modified && g_value_get_schar (&value) == 20);
g_value_set_schar (&value, 40);
modified = g_param_value_validate (pspec, &value);
g_assert (!modified && g_value_get_schar (&value) == 40);
g_value_set_schar (&value, 60);
modified = g_param_value_validate (pspec, &value);
g_assert (modified && g_value_get_schar (&value) == 40);
g_param_spec_unref (pspec);
}