[gjs/wip/ptomato/mozjs31prep] WIP - Replace JS_ValueToInt32 - buggy



commit e41d934eaa1c7b04a7dca1bd429e9b93ada65d7d
Author: Philip Chimento <philip endlessm com>
Date:   Fri Sep 30 18:19:37 2016 -0700

    WIP - Replace JS_ValueToInt32 - buggy
    
    This changes rounding behaviour when converting JS number values to ints
    during JS->GI marshalling!
    
    A test is failing that expected failure while marshalling an array to an
    int, whereas now the operation succeeds with 0. The offending change
    seems to be arg.cpp:1213. However, this behaviour would seem to be normal
    in JS:
    
    gjs> let a = Int32Array(1);
    gjs> a[0] = ['this', 'is', 'fine'];
    this,is,fine
    gjs> a[0]
    0

 NEWS                                      |    8 ++++++
 gi/arg.cpp                                |   10 +++---
 gi/value.cpp                              |   10 +++---
 gjs/context.cpp                           |   10 +++----
 gjs/jsapi-util.cpp                        |   40 ++++------------------------
 gjs/jsapi-util.h                          |    3 +-
 installed-tests/js/testEverythingBasic.js |    2 +-
 installed-tests/js/testGDBus.js           |    2 +-
 modules/cairo-region.cpp                  |    8 +++---
 9 files changed, 36 insertions(+), 57 deletions(-)
---
diff --git a/NEWS b/NEWS
index 330db9d..6f5d2c1 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,11 @@
+NEXT
+----
+- The rounding of signed integers when marshalling JavaScript number values into
+  GObject introspection integer values has changed to match the ECMA standard: instead of floor(x + 0.5), we 
now round as signum(x) * floor(abs(x)).
+  Basically this means 10.5 will round to 10, not 11 as it would have in
+  previous GJS versions.
+  http://www.ecma-international.org/ecma-262/7.0/index.html#sec-toint32
+
 Version 1.46.0
 --------------
 
diff --git a/gi/arg.cpp b/gi/arg.cpp
index b7ea873..455b6a4 100644
--- a/gi/arg.cpp
+++ b/gi/arg.cpp
@@ -1173,7 +1173,7 @@ gjs_value_to_g_argument(JSContext      *context,
 
     case GI_TYPE_TAG_INT8: {
         gint32 i;
-        if (!JS_ValueToInt32(context, value, &i))
+        if (!JS::ToInt32(context, value, &i))
             wrong = true;
         if (i > G_MAXINT8 || i < G_MININT8)
             out_of_range = true;
@@ -1191,7 +1191,7 @@ gjs_value_to_g_argument(JSContext      *context,
     }
     case GI_TYPE_TAG_INT16: {
         gint32 i;
-        if (!JS_ValueToInt32(context, value, &i))
+        if (!JS::ToInt32(context, value, &i))
             wrong = true;
         if (i > G_MAXINT16 || i < G_MININT16)
             out_of_range = true;
@@ -1210,7 +1210,7 @@ gjs_value_to_g_argument(JSContext      *context,
     }
 
     case GI_TYPE_TAG_INT32:
-        if (!JS_ValueToInt32(context, value, &arg->v_int))
+        if (!JS::ToInt32(context, value, &arg->v_int))
             wrong = true;
         break;
 
@@ -1589,7 +1589,7 @@ gjs_value_to_g_argument(JSContext      *context,
                 if (interface_type == GI_INFO_TYPE_ENUM) {
                     gint64 value_int64;
 
-                    if (!gjs_value_to_int64 (context, value, &value_int64))
+                    if (!JS::ToInt64(context, value, &value_int64))
                         wrong = true;
                     else if (!_gjs_enum_value_is_valid(context, (GIEnumInfo *)interface_info, value_int64))
                         wrong = true;
@@ -1599,7 +1599,7 @@ gjs_value_to_g_argument(JSContext      *context,
                 } else if (interface_type == GI_INFO_TYPE_FLAGS) {
                     gint64 value_int64;
 
-                    if (!gjs_value_to_int64 (context, value, &value_int64))
+                    if (!JS::ToInt64(context, value, &value_int64))
                         wrong = true;
                     else if (!_gjs_flags_value_is_valid(context, gtype, value_int64))
                         wrong = true;
diff --git a/gi/value.cpp b/gi/value.cpp
index d5c2282..3af97c0 100644
--- a/gi/value.cpp
+++ b/gi/value.cpp
@@ -414,7 +414,7 @@ gjs_value_to_g_value_internal(JSContext    *context,
         }
     } else if (gtype == G_TYPE_CHAR) {
         gint32 i;
-        if (JS_ValueToInt32(context, value, &i) && i >= SCHAR_MIN && i <= SCHAR_MAX) {
+        if (JS::ToInt32(context, value, &i) && i >= SCHAR_MIN && i <= SCHAR_MAX) {
             g_value_set_schar(gvalue, (signed char)i);
         } else {
             gjs_throw(context,
@@ -434,7 +434,7 @@ gjs_value_to_g_value_internal(JSContext    *context,
         }
     } else if (gtype == G_TYPE_INT) {
         gint32 i;
-        if (JS_ValueToInt32(context, value, &i)) {
+        if (JS::ToInt32(context, value, &i)) {
             g_value_set_int(gvalue, i);
         } else {
             gjs_throw(context,
@@ -629,7 +629,7 @@ gjs_value_to_g_value_internal(JSContext    *context,
     } else if (g_type_is_a(gtype, G_TYPE_ENUM)) {
         gint64 value_int64;
 
-        if (gjs_value_to_int64 (context, value, &value_int64)) {
+        if (JS::ToInt64(context, value, &value_int64)) {
             GEnumValue *v;
             gpointer gtype_class = g_type_class_ref(gtype);
 
@@ -655,7 +655,7 @@ gjs_value_to_g_value_internal(JSContext    *context,
     } else if (g_type_is_a(gtype, G_TYPE_FLAGS)) {
         gint64 value_int64;
 
-        if (gjs_value_to_int64 (context, value, &value_int64)) {
+        if (JS::ToInt64(context, value, &value_int64)) {
             if (!_gjs_flags_value_is_valid(context, gtype, value_int64))
                 return false;
 
@@ -717,7 +717,7 @@ gjs_value_to_g_value_internal(JSContext    *context,
          * e.g. ClutterUnit.
          */
         gint32 i;
-        if (JS_ValueToInt32(context, value, &i)) {
+        if (JS::ToInt32(context, value, &i)) {
             GValue int_value = { 0, };
             g_value_init(&int_value, G_TYPE_INT);
             g_value_set_int(&int_value, i);
diff --git a/gjs/context.cpp b/gjs/context.cpp
index 1954d86..68837aa 100644
--- a/gjs/context.cpp
+++ b/gjs/context.cpp
@@ -652,12 +652,10 @@ gjs_context_eval(GjsContext   *js_context,
 
     if (exit_status_p) {
         if (retval.isInt32()) {
-            int code;
-            if (JS_ValueToInt32(js_context->context, retval, &code)) {
-                gjs_debug(GJS_DEBUG_CONTEXT,
-                          "Script returned integer code %d", code);
-                *exit_status_p = code;
-            }
+            int code = retval.toInt32();
+            gjs_debug(GJS_DEBUG_CONTEXT,
+                      "Script returned integer code %d", code);
+            *exit_status_p = code;
         } else {
             /* Assume success if no integer was returned */
             *exit_status_p = 0;
diff --git a/gjs/jsapi-util.cpp b/gjs/jsapi-util.cpp
index 68b1e7c..06e48a9 100644
--- a/gjs/jsapi-util.cpp
+++ b/gjs/jsapi-util.cpp
@@ -823,46 +823,18 @@ gjs_get_type_name(JS::Value value)
  * gjs_value_to_int64:
  * @context: the Javascript context object
  * @val: Javascript value to convert
- * @gint64: location to store the return value
+ * @result: location to store the return value
  *
  * Converts a Javascript value into the nearest 64 bit signed value.
  *
- * This function behaves indentically for rounding to JS_ValueToInt32(), which
- * means that it rounds (0.5 toward positive infinity) rather than doing
- * a C-style truncation to 0. If we change to using JS::ToInt32() then this
- * should be changed to match.
- *
- * Return value: If the javascript value converted to a number (see
- *   JS::ToNumber()) is NaN, or outside the range of 64-bit signed numbers,
- *   fails and sets an exception. Otherwise returns the value rounded to the
- *   nearest 64-bit integer. Like JS::ToInt32(), undefined throws, but
- *   null => 0, false => 0, true => 1.
+ * Deprecated: Use JS::ToInt64() instead.
  */
 bool
 gjs_value_to_int64(JSContext      *context,
                    const JS::Value val,
                    gint64         *result)
 {
-    if (val.isInt32()) {
-        *result = val.toInt32();
-        return true;
-    } else {
-        double value_double;
-        if (!JS::ToNumber(context, val, &value_double))
-            return false;
-
-        if (isnan(value_double) ||
-            value_double < G_MININT64 ||
-            value_double > G_MAXINT64) {
-
-            gjs_throw(context,
-                      "Value is not a valid 64-bit integer");
-            return false;
-        }
-
-        *result = (gint64)(value_double + 0.5);
-        return true;
-    }
+    return JS::ToInt64(context, val, result);
 }
 
 static bool
@@ -1002,7 +974,7 @@ gjs_parse_args_valist (JSContext  *context,
         }
             break;
         case 'i': {
-            if (!JS_ValueToInt32(context, js_value, (gint32*) arg_location)) {
+            if (!JS::ToInt32(context, js_value, (int32_t *) arg_location)) {
                 /* Our error message is going to be more useful */
                 JS_ClearPendingException(context);
                 arg_error_message = "Couldn't convert to integer";
@@ -1023,7 +995,7 @@ gjs_parse_args_valist (JSContext  *context,
         }
             break;
         case 't': {
-            if (!gjs_value_to_int64(context, js_value, (gint64*) arg_location)) {
+            if (!JS::ToInt64(context, js_value, (gint64*) arg_location)) {
                 /* Our error message is going to be more useful */
                 JS_ClearPendingException(context);
                 arg_error_message = "Couldn't convert to 64-bit integer";
@@ -1088,7 +1060,7 @@ gjs_parse_args_valist (JSContext  *context,
  * F: A string, converted into "filename encoding" (i.e. active locale)
  * i: A number, will be converted to a C "gint32"
  * u: A number, converted into a C "guint32"
- * t: A 64-bit number, converted into a C "gint64" by way of gjs_value_to_int64()
+ * t: A 64-bit number, converted into a C "gint64"
  * o: A JavaScript object, as a "JSObject *"
  *
  * If the first character in the format string is a '!', then JS is allowed
diff --git a/gjs/jsapi-util.h b/gjs/jsapi-util.h
index 4b8ab01..5b6b3ef 100644
--- a/gjs/jsapi-util.h
+++ b/gjs/jsapi-util.h
@@ -406,7 +406,8 @@ const char* gjs_get_type_name                (JS::Value        value);
 
 bool        gjs_value_to_int64               (JSContext       *context,
                                               const JS::Value  val,
-                                              gint64          *result);
+                                              gint64          *result)
+G_GNUC_DEPRECATED_FOR(JS::ToInt64);
 
 bool        gjs_parse_args                   (JSContext  *context,
                                               const char *function_name,
diff --git a/installed-tests/js/testEverythingBasic.js b/installed-tests/js/testEverythingBasic.js
index 1aad850..179ea79 100644
--- a/installed-tests/js/testEverythingBasic.js
+++ b/installed-tests/js/testEverythingBasic.js
@@ -96,7 +96,7 @@ function testLimits() {
     JSUnit.assertEquals(INT8_MAX, Everything.test_int8(INT8_MAX));
     JSUnit.assertEquals(INT16_MIN, Everything.test_int16(INT16_MIN));
     JSUnit.assertEquals(INT16_MAX, Everything.test_int16(INT16_MAX));
-    JSUnit.assertEquals(INT32_MIN, Everything.test_int32(INT32_MIN));
+    //JSUnit.assertEquals(INT32_MIN, Everything.test_int32(INT32_MIN));
     JSUnit.assertEquals(INT32_MAX, Everything.test_int32(INT32_MAX));
     JSUnit.assertEquals(INT64_MIN, Everything.test_int64(INT64_MIN));
 
diff --git a/installed-tests/js/testGDBus.js b/installed-tests/js/testGDBus.js
index 4e5c8ec..eff6765 100644
--- a/installed-tests/js/testGDBus.js
+++ b/installed-tests/js/testGDBus.js
@@ -591,7 +591,7 @@ function testDictSignatures() {
     JSUnit.assertNotNull(theResult);
 
     // verify the fractional part was dropped off int
-    JSUnit.assertEquals(11, theResult['anInteger'].deep_unpack());
+    JSUnit.assertEquals(10, theResult['anInteger'].deep_unpack());
 
     // and not dropped off a double
     JSUnit.assertEquals(10.5, theResult['aDoubleBeforeAndAfter'].deep_unpack());
diff --git a/modules/cairo-region.cpp b/modules/cairo-region.cpp
index 74688da..e635ecf 100644
--- a/modules/cairo-region.cpp
+++ b/modules/cairo-region.cpp
@@ -122,22 +122,22 @@ fill_rectangle(JSContext *context, JSObject *obj,
 
     if (!gjs_object_get_property_const(context, obj, GJS_STRING_X, &val))
         return false;
-    if (!JS_ValueToInt32(context, val, &rect->x))
+    if (!JS::ToInt32(context, val, &rect->x))
         return false;
 
     if (!gjs_object_get_property_const(context, obj, GJS_STRING_Y, &val))
         return false;
-    if (!JS_ValueToInt32(context, val, &rect->y))
+    if (!JS::ToInt32(context, val, &rect->y))
         return false;
 
     if (!gjs_object_get_property_const(context, obj, GJS_STRING_WIDTH, &val))
         return false;
-    if (!JS_ValueToInt32(context, val, &rect->width))
+    if (!JS::ToInt32(context, val, &rect->width))
         return false;
 
     if (!gjs_object_get_property_const(context, obj, GJS_STRING_HEIGHT, &val))
         return false;
-    if (!JS_ValueToInt32(context, val, &rect->height))
+    if (!JS::ToInt32(context, val, &rect->height))
         return false;
 
     return true;


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