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comparison: rdf/base/src/rdfutil.cpp
rdf/base/src/rdfutil.cpp
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| -1:000000000000 | 0:f0d6ec77cfda |
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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /* | |
| 7 | |
| 8 Implementations for a bunch of useful RDF utility routines. Many of | |
| 9 these will eventually be exported outside of RDF.DLL via the | |
| 10 nsIRDFService interface. | |
| 11 | |
| 12 TO DO | |
| 13 | |
| 14 1) Make this so that it doesn't permanently leak the RDF service | |
| 15 object. | |
| 16 | |
| 17 2) Make container functions thread-safe. They currently don't ensure | |
| 18 that the RDF:nextVal property is maintained safely. | |
| 19 | |
| 20 */ | |
| 21 | |
| 22 #include "nsCOMPtr.h" | |
| 23 #include "nsIRDFDataSource.h" | |
| 24 #include "nsIRDFNode.h" | |
| 25 #include "nsIRDFService.h" | |
| 26 #include "nsIServiceManager.h" | |
| 27 #include "nsIURL.h" | |
| 28 #include "nsIIOService.h" | |
| 29 #include "nsIURL.h" | |
| 30 #include "nsNetUtil.h" | |
| 31 #include "nsRDFCID.h" | |
| 32 #include "nsString.h" | |
| 33 #include "nsXPIDLString.h" | |
| 34 #include "nsUnicharUtils.h" | |
| 35 #include "rdfutil.h" | |
| 36 | |
| 37 //////////////////////////////////////////////////////////////////////// | |
| 38 | |
| 39 nsresult | |
| 40 rdf_MakeRelativeRef(const nsCSubstring& aBaseURI, nsCString& aURI) | |
| 41 { | |
| 42 // This implementation is extremely simple: e.g., it can't compute | |
| 43 // relative paths, or anything fancy like that. If the context URI | |
| 44 // is not a prefix of the URI in question, we'll just bail. | |
| 45 uint32_t prefixLen = aBaseURI.Length(); | |
| 46 if (prefixLen != 0 && StringBeginsWith(aURI, aBaseURI)) { | |
| 47 if (prefixLen < aURI.Length() && aURI.CharAt(prefixLen) == '/') | |
| 48 ++prefixLen; // chop the leading slash so it's not `absolute' | |
| 49 | |
| 50 aURI.Cut(0, prefixLen); | |
| 51 } | |
| 52 | |
| 53 return NS_OK; | |
| 54 } | |
| 55 | |
| 56 void | |
| 57 rdf_FormatDate(PRTime aTime, nsACString &aResult) | |
| 58 { | |
| 59 // Outputs Unixish date in GMT plus usecs; e.g., | |
| 60 // Wed Jan 9 19:15:13 2002 +002441 | |
| 61 // | |
| 62 PRExplodedTime t; | |
| 63 PR_ExplodeTime(aTime, PR_GMTParameters, &t); | |
| 64 | |
| 65 char buf[256]; | |
| 66 PR_FormatTimeUSEnglish(buf, sizeof buf, "%a %b %d %H:%M:%S %Y", &t); | |
| 67 aResult.Append(buf); | |
| 68 | |
| 69 // usecs | |
| 70 aResult.Append(" +"); | |
| 71 int32_t usec = t.tm_usec; | |
| 72 for (int32_t digit = 100000; digit > 1; digit /= 10) { | |
| 73 aResult.Append(char('0' + (usec / digit))); | |
| 74 usec %= digit; | |
| 75 } | |
| 76 aResult.Append(char('0' + usec)); | |
| 77 } | |
| 78 | |
| 79 PRTime | |
| 80 rdf_ParseDate(const nsACString &aTime) | |
| 81 { | |
| 82 PRTime t; | |
| 83 PR_ParseTimeString(PromiseFlatCString(aTime).get(), true, &t); | |
| 84 | |
| 85 int32_t usec = 0; | |
| 86 | |
| 87 nsACString::const_iterator begin, digit, end; | |
| 88 aTime.BeginReading(begin); | |
| 89 aTime.EndReading(end); | |
| 90 | |
| 91 // Walk backwards until we find a `+', run out of string, or a | |
| 92 // non-numeric character. | |
| 93 digit = end; | |
| 94 while (--digit != begin && *digit != '+') { | |
| 95 if (*digit < '0' || *digit > '9') | |
| 96 break; | |
| 97 } | |
| 98 | |
| 99 if (digit != begin && *digit == '+') { | |
| 100 // There's a usec field specified (or, at least, something | |
| 101 // that looks close enough. Parse it, and add it to the time. | |
| 102 while (++digit != end) { | |
| 103 usec *= 10; | |
| 104 usec += *digit - '0'; | |
| 105 } | |
| 106 | |
| 107 t += usec; | |
| 108 } | |
| 109 | |
| 110 return t; | |
| 111 } |
