Merge branch 'gawk-4.1-stable'

15 files changed, 416 insertions, 316 deletions

diff --git a/ChangeLog b/ChangeLog
index 1fd67b68..ce4e8410 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2015-05-26  Paul Eggert  <eggert@Penguin.CS.UCLA.EDU>
+
+	* floatcomp.c (count_trailing_zeros): New function.
+	This compiles to a single TZCNT instruction on the x86-64.
+	(adjust_uint): Use it to keep more high-order bits when
+	some of the lowest-order bits are zero.  This implements
+	the documented behavior: "If the result cannot be represented
+	exactly as a C 'double', leading nonzero bits are removed one by
+	one until it can be represented exactly."
+
 2015-05-26         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* regcomp.c: Fix offsets so error messages come out correct
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 70a7147c..dd671ff0 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,7 @@
+2015-05-30         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* gawktexi.in (Bitwise Functions): Update results of testbits.awk.
+
 2015-05-19         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* 4.1.3: Release tar ball made.
diff --git a/doc/gawk.info b/doc/gawk.info
index 6a52baec..337c148c 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -13404,7 +13404,7 @@ This program produces the following output when run:
      -| 123 = 01111011
      -| 0123 = 01010011
      -| 0x99 = 10011001
-     -| compl(0x99) = 0xffffff66 = 11111111111111111111111101100110
+     -| compl(0x99) = 0x3fffffffffff66 = 00111111111111111111111111111111111111111111111101100110
      -| lshift(0x99, 2) = 0x264 = 0000001001100100
      -| rshift(0x99, 2) = 0x26 = 00100110
 
@@ -35143,309 +35143,309 @@ Ref: Time Functions-Footnote-5564193
 Ref: Time Functions-Footnote-6564420
 Node: Bitwise Functions564686
 Ref: table-bitwise-ops565280
-Ref: Bitwise Functions-Footnote-1569588
-Node: Type Functions569761
-Node: I18N Functions570917
-Node: User-defined572568
-Node: Definition Syntax573373
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-Node: Return Statement590044
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 End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index 9d1d88f6..df53c97d 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -19363,7 +19363,7 @@ $ @kbd{gawk -f testbits.awk}
 @print{} 123 = 01111011
 @print{} 0123 = 01010011
 @print{} 0x99 = 10011001
-@print{} compl(0x99) = 0xffffff66 = 11111111111111111111111101100110
+@print{} compl(0x99) = 0x3fffffffffff66 = 00111111111111111111111111111111111111111111111101100110
 @print{} lshift(0x99, 2) = 0x264 = 0000001001100100
 @print{} rshift(0x99, 2) = 0x26 = 00100110
 @end example
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index c55557a2..0cf09842 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -18484,7 +18484,7 @@ $ @kbd{gawk -f testbits.awk}
 @print{} 123 = 01111011
 @print{} 0123 = 01010011
 @print{} 0x99 = 10011001
-@print{} compl(0x99) = 0xffffff66 = 11111111111111111111111101100110
+@print{} compl(0x99) = 0x3fffffffffff66 = 00111111111111111111111111111111111111111111111101100110
 @print{} lshift(0x99, 2) = 0x264 = 0000001001100100
 @print{} rshift(0x99, 2) = 0x26 = 00100110
 @end example
diff --git a/floatcomp.c b/floatcomp.c
index 16a6d88e..d8d35694 100644
--- a/floatcomp.c
+++ b/floatcomp.c
@@ -71,6 +71,20 @@ Please port the following code to your weird host;
 #define AWKNUM_FRACTION_BITS (AWKNUM_MANT_DIG * (FLT_RADIX == 2 ? 1 : 4))
 #define DBL_FRACTION_BITS (DBL_MANT_DIG * (FLT_RADIX == 2 ? 1 : 4))
 
+/* Return the number of trailing zeros in N.  N must be nonzero.  */
+static int
+count_trailing_zeros(uintmax_t n)
+{
+#if 3 < (__GNUC__ + (4 <= __GNUC_MINOR__)) && UINTMAX_MAX <= ULLONG_MAX
+	return __builtin_ctzll(n);
+#else
+	int i = 0;
+	for (; (n & 3) == 0; n >>= 2)
+		i += 2;
+	return i + (1 & ~n);
+#endif
+}
+
 /* adjust_uint --- fiddle with values, ask Paul Eggert to explain */
 
 uintmax_t
@@ -84,8 +98,15 @@ adjust_uint(uintmax_t n)
 	 * This is more desirable in practice, since it means the user sees
 	 * integers that are the same width as the AWKNUM fractions.
 	 */
-	if (AWKNUM_FRACTION_BITS < CHAR_BIT * sizeof n)
-		n &= ((uintmax_t) 1 << AWKNUM_FRACTION_BITS) - 1;
+	int wordbits = CHAR_BIT * sizeof n;
+	if (AWKNUM_FRACTION_BITS < wordbits) {
+		uintmax_t one = 1;
+		uintmax_t sentinel = one << (wordbits - AWKNUM_FRACTION_BITS);
+		int shift = count_trailing_zeros(n | sentinel);
+		uintmax_t mask = (one << AWKNUM_FRACTION_BITS) - 1;
+
+		n &= mask << shift;
+	}
 
 	return n;
 }
diff --git a/helpers/ChangeLog b/helpers/ChangeLog
index 357bb09c..fb0cc109 100644
--- a/helpers/ChangeLog
+++ b/helpers/ChangeLog
@@ -1,3 +1,7 @@
+2015-05-27         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* mb_cur_max.c, timeformat.c: New files.
+
 2015-05-19         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* 4.1.3: Release tar ball made.
diff --git a/helpers/mb_cur_max.c b/helpers/mb_cur_max.c
new file mode 100644
index 00000000..c36d7ef7
--- /dev/null
+++ b/helpers/mb_cur_max.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <locale.h>
+#include <stdlib.h>
+
+int main()
+{
+	setlocale(LC_ALL, "");
+	printf("MB_CUR_MAX = %lu\n", MB_CUR_MAX);
+	return 0;
+}
diff --git a/helpers/timeformat.c b/helpers/timeformat.c
new file mode 100644
index 00000000..c3d1b933
--- /dev/null
+++ b/helpers/timeformat.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <locale.h>
+#include <langinfo.h>
+
+int main(int argc, char **argv)
+{
+	setlocale(LC_ALL, "");
+	printf("D_T_FMT: %s\n", nl_langinfo(D_T_FMT));
+#ifdef _DATE_FMT
+	printf("_DATE_FMT: %s\n", nl_langinfo(_DATE_FMT));
+#endif /* _DATE_FMT */
+	return 0;
+}
diff --git a/pc/ChangeLog b/pc/ChangeLog
index a9c7ec8e..fb44a486 100644
--- a/pc/ChangeLog
+++ b/pc/ChangeLog
@@ -1,3 +1,11 @@
+2015-05-29         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* Makefile.tst (negtime): Sync with mainline.
+
+2015-05-29         Scott Deifik  <scottd.mail@sbcglobal.net>
+
+	* Makefile.tst (dbugeval): Sync with mainline.
+
 2015-05-19         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* 4.1.3: Release tar ball made.
diff --git a/pc/Makefile.tst b/pc/Makefile.tst
index 8b7baa2b..a787563c 100644
--- a/pc/Makefile.tst
+++ b/pc/Makefile.tst
@@ -1201,8 +1201,10 @@ backsmalls2:
 
 dbugeval::
 	@echo $@
-	@$(AWK) --debug -f /dev/null < "$(srcdir)"/$@.in > _$@  2>&1 || echo EXIT CODE: $$? >>_$@
-	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
+	@if [ -t 0 ]; then \
+	$(AWK) --debug -f /dev/null < "$(srcdir)"/$@.in > _$@  2>&1 || echo EXIT CODE: $$? >>_$@ ; \
+	$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@ ; \
+	fi
 
 printhuge::
 	@echo $@
@@ -1232,9 +1234,8 @@ paramasfunc2::
 
 negtime::
 	@echo $@
-	@echo Expect negtime to fail with MinGW and DJGPP
 	@TZ=GMT AWKPATH="$(srcdir)" $(AWK) -f $@.awk >_$@ 2>&1 || echo EXIT CODE: $$? >>_$@
-	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
+	@AWKPATH="$(srcdir)" $(AWK) -f checknegtime.awk $@.ok _$@ && rm -f _$@
 Gt-dummy:
 # file Maketests, generated from Makefile.am by the Gentests program
 addcomma:
diff --git a/test/ChangeLog b/test/ChangeLog
index 47a6ed01..b80398e8 100644
--- a/test/ChangeLog
+++ b/test/ChangeLog
@@ -1,3 +1,9 @@
+2015-05-29         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* checknegtime.awk: New file.
+	* Makefile.am (negtime): Use checknegtime.awk to test results.
+	Should solve some problems with BSD and also MinGW.
+
 2015-05-21         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* fts.awk: Really remove atime from the output. 
diff --git a/test/Makefile.am b/test/Makefile.am
index fe30cb41..f13fa2fb 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -137,6 +137,7 @@ EXTRA_DIST = \
 	charasbytes.awk \
 	charasbytes.in \
 	charasbytes.ok \
+	checknegtime.awk \
 	childin.awk \
 	childin.in \
 	childin.ok \
@@ -2116,8 +2117,7 @@ paramasfunc2::
 negtime::
 	@echo $@
 	@TZ=GMT AWKPATH="$(srcdir)" $(AWK) -f $@.awk >_$@ 2>&1 || echo EXIT CODE: $$? >>_$@
-	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
-
+	@AWKPATH="$(srcdir)" $(AWK) -f checknegtime.awk $@.ok _$@ && rm -f _$@
 
 # Targets generated for other tests:
 include Maketests
diff --git a/test/Makefile.in b/test/Makefile.in
index cddc7a5e..08c04a02 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -394,6 +394,7 @@ EXTRA_DIST = \
 	charasbytes.awk \
 	charasbytes.in \
 	charasbytes.ok \
+	checknegtime.awk \
 	childin.awk \
 	childin.in \
 	childin.ok \
@@ -2552,7 +2553,7 @@ paramasfunc2::
 negtime::
 	@echo $@
 	@TZ=GMT AWKPATH="$(srcdir)" $(AWK) -f $@.awk >_$@ 2>&1 || echo EXIT CODE: $$? >>_$@
-	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
+	@AWKPATH="$(srcdir)" $(AWK) -f checknegtime.awk $@.ok _$@ && rm -f _$@
 Gt-dummy:
 # file Maketests, generated from Makefile.am by the Gentests program
 addcomma:
diff --git a/test/checknegtime.awk b/test/checknegtime.awk
new file mode 100644
index 00000000..06dfcae9
--- /dev/null
+++ b/test/checknegtime.awk
@@ -0,0 +1,22 @@
+NR == 1 {
+	# Tue Dec 15 07:00:00 GMT 1959
+	Weekday = $1
+	Month = $2
+	Day = $3
+	Time = $4
+	Timezone = $5
+	Year = $6
+}
+
+NR == 2 {
+	if (NF == 0)	# MinGW gives an empty line
+		exit 0
+
+	# Some BSDs give us UTC in the timezone
+	if ($1 == Weekday && $2 == Month && $3 == Day &&
+	    $4 == Time && $6 == Year)
+		exit 0
+
+	# Some other mismatch
+	exit 1
+}