awk macro: new fconv conversions c and cz.

* share/txr/stdlib/conv.tl (sys:conv-let): New
local functions c and cz, using the new #\c
radix conversion.

* txr.1: Documented new extension under the fconv
awk macro. Also fixed a typo here; the b conversion
was exemplified as (c str).

2 files changed, 22 insertions, 3 deletions

diff --git a/share/txr/stdlib/conv.tl b/share/txr/stdlib/conv.tl
index 88a8fb95..e373e3dc 100644
--- a/share/txr/stdlib/conv.tl
+++ b/share/txr/stdlib/conv.tl
@@ -33,6 +33,8 @@
             (toint arg 16))
           (b (arg)
             (toint arg 2))
+          (c (arg)
+            (toint arg #\c))
           (r (arg)
             (tofloat arg))
           (iz (arg : radix)
@@ -43,6 +45,8 @@
             (tointz arg 16))
           (bz (arg)
             (tointz arg 2))
+          (cz (arg)
+            (tointz arg #\c))
           (rz (arg)
             (tofloatz arg)))
      ,*body))
diff --git a/txr.1 b/txr.1
index e46d52a0..7c1ec319 100644
--- a/txr.1
+++ b/txr.1
@@ -45805,21 +45805,36 @@ is equivalent to
 .coIP b
 Converts a string value holding a binary (base two) representation
 to the integer which it denotes. The expression
-.code "(c str)"
+.code "(b str)"
 is equivalent to
 .codn "(toint str 2)" .
+.coIP c
+Converts a string value holding a C-language-style representation
+to the integer which it denotes, meaning that the
+.code 0x
+prefix denotes a hexadecimal value, a leading zero octal, otherwise
+decimal. These prefixes follow the
+.code +
+or
+.code -
+sign, if present.
+The expression
+.code "(c str)"
+is equivalent to
+.codn "(toint str #\ec)" .
 .coIP r
 Converts a string holding a floating-point representation to
 the floating-point value which it denotes. The expression
 .code "(r str)"
 is equivalent to
 .codn "(tofloat str)" .
-.ccIP @, iz @, oz @, xz @ bz and @ rz
+.ccIP @, iz @, oz @, xz @, bz @ cz and @ rz
 Conversion similar to
 .codn i ,
 .codn o ,
 .codn x ,
-.code b
+.codn b ,
+.code c
 and
 .codn r ,
 but using