From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mail-il1-f179.google.com ([209.85.166.179]) by ewsd; Sun Dec  1 17:17:29 EST 2019
Received: by mail-il1-f179.google.com with SMTP id t17so4625225ilm.13
        for <9front@9front.org>; Sun, 01 Dec 2019 14:17:26 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20161025;
        h=mime-version:from:date:message-id:subject:to;
        bh=hvyNnnW3Ud+0Wz9h37lj0kk7U0NlK97GICHtpHRyLSw=;
        b=DvgmrdbQlztWn5n8lmEjTVH4zI3Fz0/hw1ebHRmx90pzY2vafPx531Zp3IWDS8xkl2
         xGNAQQ8Niy3WkerW1vuwr6dwjkvzZAuTriomlDhnmaY5cLci9k88DqJRJhbkr4C7vA8l
         lrA+yoRC7kw/upUBVTZC66wXLQWd0F6f4RvlIp/07BLHdFVsLvQEBc+fFZwv9iaVSuWQ
         AuN89N+cVenxlI3G4MaOi93AQ8OZQFIUuOrE1LVqMsiTSV/uSS0P+/Kq/kTnRp9RY1AI
         bNiFcKyDIlmQuioj+D8cpvJqu5P4ypHcLGa18qrdDiuDVq8BdTqtUkKGPAnj7sVlrbPi
         Y4rw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
        bh=hvyNnnW3Ud+0Wz9h37lj0kk7U0NlK97GICHtpHRyLSw=;
        b=RW3Kh4x09olDnvi+42tUlnIRpVaFUoEGchsYl3Wu4dKgAKH6a2W1WSRFOFlV17qA14
         pADRd0JHvf7T1awzLK+mlzLkS+WnKX+6qH/bGWBS3CZzJYiyezVsZFdwWdMoAwJgfXbD
         fbT+jylCTuIkbZH/BmdfEGOu3NZrxzh77IB5Ciualy3JbmMvXjddswGIDjrd/CUbAU+t
         Dlji/INQhm+EuYXTONAq+wu9TnjwlibehkP5hfuqekeI4bC/LRoCC1AkXcuB9wqDvD1O
         lmWN0C9BBGeApDejpTrdaYSTSQAgjruMtaqqdz++xr+7UdO7QZzzBTD+6FFVlXeoPFig
         +2cw==
X-Gm-Message-State: APjAAAVupHDsc2elaw4fWJIi5/wQMd6+IyAvxrjGaoBYH2veP726h11g
	b4LUL7VGY0bzfB2KWTFodBmChNS4sgbLUFRHQJNtM1BY
X-Google-Smtp-Source: APXvYqxFgPGTYO7aSF+mtFobDVDHYB8pqe3qu7gzxRUOac/3SP8r30jlS+7vIE1jNttKSmMUULCKTFYa/zmvzs1RtR8=
X-Received: by 2002:a92:994d:: with SMTP id p74mr21881200ili.30.1575238645608;
 Sun, 01 Dec 2019 14:17:25 -0800 (PST)
MIME-Version: 1.0
From: "Amavect ." <amavect@gmail.com>
Date: Sun, 1 Dec 2019 16:17:14 -0600
Message-ID: <CAGOW0YOssGUPmgSxX1PbJHS=hpaqk3gHbgTnRr+t_CsS1b9ctw@mail.gmail.com>
Subject: print(2): document n verb and z flag
To: 9front@9front.org
Content-Type: text/plain; charset="UTF-8"
List-ID: <9front.9front.org>
List-Help: <http://lists.9front.org>
X-Glyph: ➈
X-Bullshit: object-oriented interface descriptor hypervisor 

Heyo,

print(2): document n verb and z flag
libc.h: add varargck pragmas for n flags

The source for the n flag can take the usual int size flags.
/sys/src/libc/fmt/dofmt.c:/_countfmt/:
In order for the compiler to not complain about these flags,
/sys/include/libc.h needs varargck pragmas.

Thanks,
Amavect

---------

diff -r 94226ee6784b sys/include/libc.h
--- a/sys/include/libc.h    Sun Dec 01 17:57:14 2019 +0100
+++ b/sys/include/libc.h    Sun Dec 01 16:10:29 2019 -0600
@@ -223,6 +223,10 @@
 #pragma    varargck    type    "r"    void
 #pragma    varargck    type    "%"    void
 #pragma    varargck    type    "n"    int*
+#pragma    varargck    type    "hn"    short*
+#pragma    varargck    type    "hhn"    char*
+#pragma    varargck    type    "ln"    long*
+#pragma    varargck    type    "lln"    vlong*
 #pragma    varargck    type    "p"    uintptr
 #pragma    varargck    type    "p"    void*
 #pragma    varargck    flag    ','
diff -r 94226ee6784b sys/man/2/print
--- a/sys/man/2/print    Sun Dec 01 17:57:14 2019 +0100
+++ b/sys/man/2/print    Sun Dec 01 16:10:29 2019 -0600
@@ -200,13 +200,15 @@
 .BR l ,
 .BR ll ,
 .BR u ,
+.BR z ,
 .BR + ,
 .BR - ,
 .BR , ,
 and
 .B #
 to mean pad with zeros,
-short, byte, long, vlong, unsigned, always print a sign, left
justified, commas every three digits,
+short, byte, long, vlong, unsigned, intptr/uintptr,
+always print a sign, left justified, commas every three digits,
 and alternate format.
 Also, a space character in the flag
 position is like
@@ -374,6 +376,17 @@
 in hexadecimal.
 .PP
 The
+.B n
+verb takes the number of bytes written so far and copies it to the
+.B int*
+pointer argument. The flags h, hh, l, ll are interpret the argument type as
+.BR short* ,
+.BR byte* ,
+.BR long* ,
+and
+.BR vlong* .
+.PP
+The
 .B r
 verb takes no arguments; it copies the error string returned by a call to
 .IR errstr (2).