Almost complete implementation of roff(7) numerical expressions.

Support all binary operators except ';' (scale conversion).
Fully support chained operations and nested parentheses.
Use this for the .nr, .if, and .ie requests.
While here, fix parsing of integer numbers in roff_getnum().

3 files changed, 102 insertions, 2 deletions

diff --git a/regress/usr.bin/mandoc/roff/nr/Makefile b/regress/usr.bin/mandoc/roff/nr/Makefile
index 19e66eb2ae0..e642dadeb26 100644
--- a/regress/usr.bin/mandoc/roff/nr/Makefile
+++ b/regress/usr.bin/mandoc/roff/nr/Makefile
@@ -1,5 +1,5 @@
-# $OpenBSD: Makefile,v 1.4 2014/04/05 20:33:38 schwarze Exp $
+# $OpenBSD: Makefile,v 1.5 2014/04/07 15:05:12 schwarze Exp $
 
-REGRESS_TARGETS = int argc predef rr
+REGRESS_TARGETS = argc eval int predef rr
 
 .include <bsd.regress.mk>
diff --git a/regress/usr.bin/mandoc/roff/nr/eval.in b/regress/usr.bin/mandoc/roff/nr/eval.in
new file mode 100644
index 00000000000..16bf24e3b5d
--- /dev/null
+++ b/regress/usr.bin/mandoc/roff/nr/eval.in
@@ -0,0 +1,67 @@
+.TH NR-EVAL 1 "April 7, 2014" OpenBSD
+.SH NAME
+nr-eval \- numeric expressions in assignments to number registers
+.SH DESCRIPTION
+.nr mr 1
+1: \n(mr
+.br
+.nr mr nonumber
+nonumber: \n(mr
+.br
+.nr mr 3X
+3X: \n(mr
+.br
+.nr mr 4+
+4+: \n(mr
+.br
+.nr mr 2+3
+2+3: \n(mr
+.br
+.nr mr 1+1:
+1+1:: \n(mr
+.br
+.nr mr 10-3
+10-3: \n(mr
+.br
+.nr mr 4*2
+4*2: \n(mr
+.br
+.nr mr 27/3
+27/3: \n(mr
+.br
+.nr mr 58%16
+58%16: \n(mr
+.br
+.nr mr 11<?20
+11<?20: \n(mr
+.br
+.nr mr 30<?12
+30<?12: \n(mr
+.br
+.nr mr 7>?13
+7>?13: \n(mr
+.br
+.nr mr 14>?6
+14>?6: \n(mr
+.br
+.nr mr 2+3*3
+2+3*3: \n(mr
+.br
+.nr mr 16+(
+para at eol: \n(mr
+.br
+.nr mr (17
+unclosed para: \n(mr
+.br
+.nr mr (18)
+(18): \n(mr
+.br
+.nr mr ( 25 - 6 )
+( 25 - 6 ): \n(mr
+.br
+.nr mr 11+( 3*3 )
+11+( 3*3 ): \n(mr
+.br
+.nr mr 3+(3*(5==5*2)*4)+(3*5)/2
+3+(3*(5==5*2)*4)+(3*5)/2: \n(mr
+.br
diff --git a/regress/usr.bin/mandoc/roff/nr/eval.out_ascii b/regress/usr.bin/mandoc/roff/nr/eval.out_ascii
new file mode 100644
index 00000000000..b2edcc52532
--- /dev/null
+++ b/regress/usr.bin/mandoc/roff/nr/eval.out_ascii
@@ -0,0 +1,33 @@
+NR-EVAL(1)                 OpenBSD Reference Manual                 NR-EVAL(1)
+
+
+
+NNAAMMEE
+       nr-eval - numeric expressions in assignments to number registers
+
+DDEESSCCRRIIPPTTIIOONN
+       1: 1
+       nonumber: 1
+       3X: 3
+       4+: 3
+       2+3: 5
+       1+1:: 5
+       10-3: 7
+       4*2: 8
+       27/3: 9
+       58%16: 10
+       11<?20: 11
+       30<?12: 12
+       7>?13: 13
+       14>?6: 14
+       2+3*3: 15
+       para at eol: 15
+       unclosed para: 17
+       (18): 18
+       ( 25 - 6 ): 19
+       11+( 3*3 ): 20
+       3+(3*(5==5*2)*4)+(3*5)/2: 21
+
+
+
+OpenBSD                          April 7, 2014                      NR-EVAL(1)