Issue 3382: Make '%F' and float.__format__('F') convert results to upper case.

8 files changed, 53 insertions, 23 deletions

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index e857154..3c0aa18 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -1296,9 +1296,9 @@ The conversion types are:
 +------------+-----------------------------------------------------+-------+
 | ``'E'``    | Floating point exponential format (uppercase).      | \(3)  |
 +------------+-----------------------------------------------------+-------+
-| ``'f'``    | Floating point decimal format.                      | \(3)  |
+| ``'f'``    | Floating point decimal format (lowercase).          | \(3)  |
 +------------+-----------------------------------------------------+-------+
-| ``'F'``    | Floating point decimal format.                      | \(3)  |
+| ``'F'``    | Floating point decimal format (uppercase).          | \(3)  |
 +------------+-----------------------------------------------------+-------+
 | ``'g'``    | Floating point format. Uses lowercase exponential   | \(4)  |
 |            | format if exponent is less than -4 or not less than |       |
diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index 0e345e3..cb9cf93 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -429,13 +429,14 @@ The available presentation types for floating point and decimal values are:
    | ``'e'`` | Exponent notation. Prints the number in scientific       |
    |         | notation using the letter 'e' to indicate the exponent.  |
    +---------+----------------------------------------------------------+
-   | ``'E'`` | Exponent notation. Same as ``'e'`` except it uses an     |
-   |         | upper case 'E' as the separator character.               |
+   | ``'E'`` | Exponent notation. Same as ``'e'`` except it converts    |
+   |         | the number to upper case.                                |
    +---------+----------------------------------------------------------+
    | ``'f'`` | Fixed point. Displays the number as a fixed-point        |
    |         | number.                                                  |
    +---------+----------------------------------------------------------+
-   | ``'F'`` | Fixed point. Same as ``'f'``.                            |
+   | ``'F'`` | Fixed point. Same as ``'f'`` except it converts the      |
+   |         | number to upper case.                                    |
    +---------+----------------------------------------------------------+
    | ``'g'`` | General format. This prints the number as a fixed-point  |
    |         | number, unless the number is too large, in which case    |
diff --git a/Lib/test/test_format.py b/Lib/test/test_format.py
index cd46bc2..1268670 100644
--- a/Lib/test/test_format.py
+++ b/Lib/test/test_format.py
@@ -88,6 +88,18 @@ class FormatTest(unittest.TestCase):
         testboth("%#.*F", (110, -1.e+100/3.))
         overflowrequired = 0
 
+        # check for %f and %F
+        testboth("%f", (1.0,), "1.000000")
+        testboth("%F", (1.0,), "1.000000")
+        testboth("%f", (1e100,), "1e+100")
+        testboth("%F", (1e100,), "1E+100")
+        testboth("%f", (1e100,), "1e+100")
+        testboth("%F", (1e100,), "1E+100")
+        testboth("%f", (float('nan'),), "nan")
+        testboth("%F", (float('nan'),), "NAN")
+        testboth("%f", (float('inf'),), "inf")
+        testboth("%F", (float('inf'),), "INF")
+
         # Formatting of long integers. Overflow is not ok
         overflowok = 0
         testboth("%x", 10L, "a")
diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
index 03f2ff8..78106a3 100644
--- a/Lib/test/test_types.py
+++ b/Lib/test/test_types.py
@@ -587,9 +587,17 @@ class TypesTests(unittest.TestCase):
         test( 1.0, '+f', '+1.000000')
         test(-1.0, '+f', '-1.000000')
         test(1.1234e90, 'f', '1.1234e+90')
-        test(1.1234e90, 'F', '1.1234e+90')
+        test(1.1234e90, 'F', '1.1234E+90')
         test(1.1234e200, 'f', '1.1234e+200')
-        test(1.1234e200, 'F', '1.1234e+200')
+        test(1.1234e200, 'F', '1.1234E+200')
+        test(1e100, 'x<20f', '1e+100xxxxxxxxxxxxxx')
+        test(1e100, 'x<20F', '1E+100xxxxxxxxxxxxxx')
+        test(float('nan'), 'f', 'nan')
+        test(float('nan'), 'F', 'NAN')
+        test(float('inf'), 'f', 'inf')
+        test(float('inf'), 'F', 'INF')
+        test(float('-inf'), 'f', '-inf')
+        test(float('-inf'), 'F', '-INF')
 
         test( 1.0, 'e', '1.000000e+00')
         test(-1.0, 'e', '-1.000000e+00')
diff --git a/Misc/NEWS b/Misc/NEWS
index 8b32d61..a7f371e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@ What's New in Python 2.6 beta 2?
 Core and Builtins
 -----------------
 
+- Issue #3382: Make '%F' and float.__format__('F') convert results
+  to uppercase.
+
 - Issue #3156: Fix inconsistent behavior of the bytearray type: all
   its methods now allow for items objects that can be converted to
   an integer using operator.index().
diff --git a/Objects/stringlib/formatter.h b/Objects/stringlib/formatter.h
index b964435..d8cb171 100644
--- a/Objects/stringlib/formatter.h
+++ b/Objects/stringlib/formatter.h
@@ -741,10 +741,6 @@ format_float_internal(PyObject *value,
     /* first, do the conversion as 8-bit chars, using the platform's
        snprintf.  then, if needed, convert to unicode. */
 
-    /* 'F' is the same as 'f', per the PEP */
-    if (type == 'F')
-        type = 'f';
-
     x = PyFloat_AsDouble(value);
 
     if (x == -1.0 && PyErr_Occurred())
@@ -758,8 +754,12 @@ format_float_internal(PyObject *value,
 
     if (precision < 0)
         precision = 6;
-    if (type == 'f' && (fabs(x) / 1e25) >= 1e25)
-        type = 'g';
+    if ((type == 'f' || type == 'F') && (fabs(x) / 1e25) >= 1e25) {
+	if (type == 'f')
+	    type = 'g';
+	else
+	    type = 'G';
+    }
 
     /* cast "type", because if we're in unicode we need to pass a
        8-bit char.  this is safe, because we've restricted what "type"
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 793cc88..b161c8c 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -4320,8 +4320,12 @@ formatfloat(char *buf, size_t buflen, int flags,
 	}
 	if (prec < 0)
 		prec = 6;
-	if (type == 'f' && fabs(x)/1e25 >= 1e25)
-		type = 'g';
+	if ((type == 'f' || type == 'F') && (fabs(x) / 1e25) >= 1e25) {
+		if (type == 'f')
+			type = 'g';
+		else
+			type = 'G';
+	}
 	/* Worst case length calc to ensure no buffer overrun:
 
 	   'g' formats:
@@ -4340,7 +4344,8 @@ formatfloat(char *buf, size_t buflen, int flags,
 	*/
 	if (((type == 'g' || type == 'G') &&
               buflen <= (size_t)10 + (size_t)prec) ||
-	    (type == 'f' && buflen <= (size_t)53 + (size_t)prec)) {
+	    ((type == 'f' || type == 'F') &&
+	      buflen <= (size_t)53 + (size_t)prec)) {
 		PyErr_SetString(PyExc_OverflowError,
 			"formatted float is too long (precision too large?)");
 		return -1;
@@ -4910,8 +4915,6 @@ PyString_Format(PyObject *format, PyObject *args)
 			case 'F':
 			case 'g':
 			case 'G':
-				if (c == 'F')
-					c = 'f';
 				pbuf = formatbuf;
 				len = formatfloat(pbuf, sizeof(formatbuf),
 						  flags, prec, c, v);
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index a62e929..a885ff0 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -8191,8 +8191,12 @@ formatfloat(Py_UNICODE *buf,
 	return -1;
     if (prec < 0)
 	prec = 6;
-    if (type == 'f' && (fabs(x) / 1e25) >= 1e25)
-	type = 'g';
+    if ((type == 'f' || type == 'F') && (fabs(x) / 1e25) >= 1e25) {
+        if (type == 'f')
+            type = 'g';
+        else
+            type = 'G';
+    }
     /* Worst case length calc to ensure no buffer overrun:
 
        'g' formats:
@@ -8211,7 +8215,8 @@ formatfloat(Py_UNICODE *buf,
     */
     if (((type == 'g' || type == 'G') && 
           buflen <= (size_t)10 + (size_t)prec) ||
-	(type == 'f' && buflen <= (size_t)53 + (size_t)prec)) {
+	((type == 'f' || type == 'F')  &&
+          buflen <= (size_t)53 + (size_t)prec)) {
 	PyErr_SetString(PyExc_OverflowError,
 			"formatted float is too long (precision too large?)");
 	return -1;
@@ -8704,8 +8709,6 @@ PyObject *PyUnicode_Format(PyObject *format,
 	    case 'F':
 	    case 'g':
 	    case 'G':
-		if (c == 'F')
-			c = 'f';
 		pbuf = formatbuf;
 		len = formatfloat(pbuf, sizeof(formatbuf)/sizeof(Py_UNICODE),
 			flags, prec, c, v);