From owner-sc22wg14+sc22wg14-domo2=www.open-std.org@open-std.org Wed Apr 8 13:31:37 2026 Return-Path: X-Original-To: sc22wg14-domo2 Delivered-To: sc22wg14-domo2@www.open-std.org Received: by www.open-std.org (Postfix, from userid 521) id 67317356DDB; Wed, 8 Apr 2026 13:31:37 +0200 (CEST) Delivered-To: sc22wg14@open-std.org Received: from out-178.mta0.migadu.com (out-178.mta0.migadu.com [91.218.175.178]) by www.open-std.org (Postfix) with ESMTP id 16224356D2F for ; Wed, 8 Apr 2026 13:31:35 +0200 (CEST) Date: Wed, 8 Apr 2026 13:31:24 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alejandro-colomar.es; s=key1; t=1775647895; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type; bh=Tw3Mjl8T5y7ofs18GKOsSmsSyoq/UvCWuCDFVXlu4+o=; b=eoobr1PtrVrNvoqz6UbqKk0Nbq4k12gFv530J5M/X/WQ3aclqJiEEcjXPhZJAizZyzRtUn m7F3eyhssh1I4z7L4VYk8euUc6eJfWJtT5jdrDoY35pRGp0sIyRZ8vcS2dSM//EzoCAOE6 v1T4wIB4tepokGdPEbNZCUM0tkyFsuExmhVgRkCWjM6iMIz2RTJimtp7uGa38rb/rX3j6T sPxu24r57nShSko71uYITjG53BnOsGy30Bxz++JgYG779S2sZyIipLu38NZmtFB00iNDvZ PYOc6tRqryzBqvDorW8r1xAYwsH38FL4fZ1sfOnnL0c0EP1emqlqtbPfiC1oTQ== X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Alejandro Colomar To: C Committee Cc: Joseph Myers Subject: alx-0090r0 - Error returns from specific width length modifiers Message-ID: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="4bxcsjlcwqfufzau" Content-Disposition: inline X-Migadu-Flow: FLOW_OUT Sender: owner-sc22wg14@open-std.org Precedence: bulk --4bxcsjlcwqfufzau Content-Type: text/plain; protected-headers=v1; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable From: Alejandro Colomar To: C Committee Cc: Joseph Myers Subject: alx-0090r0 - Error returns from specific width length modifiers Message-ID: MIME-Version: 1.0 Hi, Here's a proposal for addressing Issue 1012 from n3773. I have not included wording for wchar.h and Annex K, as it seems obvious what to do from the instructions. I've just written 'Do the same' to note to the editor that morally the same thing should be done. I've also applied some refactor, which will make fprintf() and fscanf() specifications smaller, and thus easier to compare to the other functions. The specification of the format strings go to General sections before the functions. Have a lovely day! Alex --- Name alx-0090r0 - Error returns from specific width length modifiers Category Refactor, and fix issue n3773::1012. Author Reported-by: Joseph Myers Signed-off-by: Alejandro Colomar History r0 (2026-04-08): - Initial draft. Rationale See n3773, issue 1012. Proposed wording Based on N3854 + alx-0043. 7.24.6.1+1 Formatted output functions @@ New subsection after title. +7.24.6.1+1.0+1 General +Description +1 + The formatted output functions accept a format string + that specifies how the subsequent arguments + are converted for output. + ## Move all paragraphs from 'The fprintf function' Description, ## except for the first one. + +Recommended practice ## Move verbatim from 'The fprintf function'. + +Environmental limits ## Move verbatim from 'The fprintf function'. 7.24.6.1+1.1 The fprintf function @@ Description ## Remove all paragraphs except the first one (p2). @@ Recommended practice ## Remove entirely (move to above). @@ Returns s/specified/specific/ @@ Environmental limits ## Remove entirely (move to above). 7.24.6.1+1.{2..8} @@ Returns ... or a negative value if an output or encoding error -occurred. +occurred, +or if the implementation does not support +a specific width length modifier. 7.24.6.1+2 Formatted input functions @@ New subsection after title. +7.24.6.1+2.0+1 General +Description +1 + The formatted input functions accept a format string + that specifies the admissible input sequences + and how they are to be converted for assignmentm + using subsequent arguments as pointers to the objects + to receive the converted input. + ## Move all paragraphs from 'The fscanf function' Description, ## except for the first one. 7.24.6.1+2.1 The fscanf function @@ Description ## Remove all paragraphs except the first one (p2). 7.24.6.1+2.{2..7} @@ Returns ... or even zero, in the event of an early -matching failure. +matching failure +or if the implementation does not support +a specific width length modifier. 7.33.2 Formatted wide character input/output functions ## Do the same. 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