1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rdf/base/src/rdfutil.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,111 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 +
1.11 + Implementations for a bunch of useful RDF utility routines. Many of
1.12 + these will eventually be exported outside of RDF.DLL via the
1.13 + nsIRDFService interface.
1.14 +
1.15 + TO DO
1.16 +
1.17 + 1) Make this so that it doesn't permanently leak the RDF service
1.18 + object.
1.19 +
1.20 + 2) Make container functions thread-safe. They currently don't ensure
1.21 + that the RDF:nextVal property is maintained safely.
1.22 +
1.23 + */
1.24 +
1.25 +#include "nsCOMPtr.h"
1.26 +#include "nsIRDFDataSource.h"
1.27 +#include "nsIRDFNode.h"
1.28 +#include "nsIRDFService.h"
1.29 +#include "nsIServiceManager.h"
1.30 +#include "nsIURL.h"
1.31 +#include "nsIIOService.h"
1.32 +#include "nsIURL.h"
1.33 +#include "nsNetUtil.h"
1.34 +#include "nsRDFCID.h"
1.35 +#include "nsString.h"
1.36 +#include "nsXPIDLString.h"
1.37 +#include "nsUnicharUtils.h"
1.38 +#include "rdfutil.h"
1.39 +
1.40 +////////////////////////////////////////////////////////////////////////
1.41 +
1.42 +nsresult
1.43 +rdf_MakeRelativeRef(const nsCSubstring& aBaseURI, nsCString& aURI)
1.44 +{
1.45 + // This implementation is extremely simple: e.g., it can't compute
1.46 + // relative paths, or anything fancy like that. If the context URI
1.47 + // is not a prefix of the URI in question, we'll just bail.
1.48 + uint32_t prefixLen = aBaseURI.Length();
1.49 + if (prefixLen != 0 && StringBeginsWith(aURI, aBaseURI)) {
1.50 + if (prefixLen < aURI.Length() && aURI.CharAt(prefixLen) == '/')
1.51 + ++prefixLen; // chop the leading slash so it's not `absolute'
1.52 +
1.53 + aURI.Cut(0, prefixLen);
1.54 + }
1.55 +
1.56 + return NS_OK;
1.57 +}
1.58 +
1.59 +void
1.60 +rdf_FormatDate(PRTime aTime, nsACString &aResult)
1.61 +{
1.62 + // Outputs Unixish date in GMT plus usecs; e.g.,
1.63 + // Wed Jan 9 19:15:13 2002 +002441
1.64 + //
1.65 + PRExplodedTime t;
1.66 + PR_ExplodeTime(aTime, PR_GMTParameters, &t);
1.67 +
1.68 + char buf[256];
1.69 + PR_FormatTimeUSEnglish(buf, sizeof buf, "%a %b %d %H:%M:%S %Y", &t);
1.70 + aResult.Append(buf);
1.71 +
1.72 + // usecs
1.73 + aResult.Append(" +");
1.74 + int32_t usec = t.tm_usec;
1.75 + for (int32_t digit = 100000; digit > 1; digit /= 10) {
1.76 + aResult.Append(char('0' + (usec / digit)));
1.77 + usec %= digit;
1.78 + }
1.79 + aResult.Append(char('0' + usec));
1.80 +}
1.81 +
1.82 +PRTime
1.83 +rdf_ParseDate(const nsACString &aTime)
1.84 +{
1.85 + PRTime t;
1.86 + PR_ParseTimeString(PromiseFlatCString(aTime).get(), true, &t);
1.87 +
1.88 + int32_t usec = 0;
1.89 +
1.90 + nsACString::const_iterator begin, digit, end;
1.91 + aTime.BeginReading(begin);
1.92 + aTime.EndReading(end);
1.93 +
1.94 + // Walk backwards until we find a `+', run out of string, or a
1.95 + // non-numeric character.
1.96 + digit = end;
1.97 + while (--digit != begin && *digit != '+') {
1.98 + if (*digit < '0' || *digit > '9')
1.99 + break;
1.100 + }
1.101 +
1.102 + if (digit != begin && *digit == '+') {
1.103 + // There's a usec field specified (or, at least, something
1.104 + // that looks close enough. Parse it, and add it to the time.
1.105 + while (++digit != end) {
1.106 + usec *= 10;
1.107 + usec += *digit - '0';
1.108 + }
1.109 +
1.110 + t += usec;
1.111 + }
1.112 +
1.113 + return t;
1.114 +}
