Return-Path: X-Original-To: notmuch@notmuchmail.org Delivered-To: notmuch@notmuchmail.org Received: from localhost (localhost [127.0.0.1]) by olra.theworths.org (Postfix) with ESMTP id 39B3E431FBD for ; Fri, 21 Dec 2012 05:08:45 -0800 (PST) X-Virus-Scanned: Debian amavisd-new at olra.theworths.org X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=0 tagged_above=-999 required=5 tests=[none] autolearn=disabled Received: from olra.theworths.org ([127.0.0.1]) by localhost (olra.theworths.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id O6E5Wu-Re3ij for ; Fri, 21 Dec 2012 05:08:44 -0800 (PST) Received: from tesseract.cs.unb.ca (tesseract.cs.unb.ca [131.202.240.238]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by olra.theworths.org (Postfix) with ESMTPS id 36FF9431FC3 for ; Fri, 21 Dec 2012 05:08:39 -0800 (PST) Received: from fctnnbsc30w-156034082078.dhcp-dynamic.fibreop.nb.bellaliant.net ([156.34.82.78] helo=zancas.localnet) by tesseract.cs.unb.ca with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.72) (envelope-from ) id 1Tm2L6-0005dc-JS; Fri, 21 Dec 2012 09:08:37 -0400 Received: from bremner by zancas.localnet with local (Exim 4.80) (envelope-from ) id 1Tm2L1-0005yc-4j; Fri, 21 Dec 2012 09:08:31 -0400 From: david@tethera.net To: notmuch@notmuchmail.org Subject: [Patch v8 06/18] util/hex-escape: add a function to check strings unchanged by hex encoding. Date: Fri, 21 Dec 2012 09:08:15 -0400 Message-Id: <1356095307-22895-6-git-send-email-david@tethera.net> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1356095307-22895-1-git-send-email-david@tethera.net> References: <1356095307-22895-1-git-send-email-david@tethera.net> X-Spam_bar: - Cc: David Bremner X-BeenThere: notmuch@notmuchmail.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Use and development of the notmuch mail system." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 21 Dec 2012 13:08:45 -0000 From: David Bremner Initial use case is to recognize input tokens for batch tagging that need quoting. --- util/hex-escape.c | 7 +++++++ util/hex-escape.h | 8 ++++++++ 2 files changed, 15 insertions(+) diff --git a/util/hex-escape.c b/util/hex-escape.c index b7e2e07..b601a33 100644 --- a/util/hex-escape.c +++ b/util/hex-escape.c @@ -24,6 +24,7 @@ #include #include "error_util.h" #include "hex-escape.h" +#include "string-util.h" static const size_t default_buf_size = 1024; @@ -38,6 +39,12 @@ is_output (char c) return (strchr (output_charset, c) != NULL); } +size_t +hex_invariant (const char *str, size_t len) +{ + return strnspn (str, len, output_charset); +} + static int maybe_realloc (void *ctx, size_t needed, char **out, size_t *out_size) { diff --git a/util/hex-escape.h b/util/hex-escape.h index 5182042..e7d0b31 100644 --- a/util/hex-escape.h +++ b/util/hex-escape.h @@ -38,4 +38,12 @@ hex_decode (void *talloc_ctx, const char *in, char **out, */ hex_status_t hex_decode_inplace (char *s); + +/* + * Calculate the length of the initial segment of str that would not + * be changed by hex encoding. Consider at most `len' characters + * (bytes) before stopping. + */ +size_t +hex_invariant (const char *str, size_t len); #endif -- 1.7.10.4