The Tor Browser / file comparison
comparison: intl/hyphenation/src/hnjstdio.cpp
intl/hyphenation/src/hnjstdio.cpp
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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replaced
| -1:000000000000 | 0:877f2968e340 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 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 // This file provides substitutes for the basic stdio routines used by hyphen.c | |
| 7 // to read its dictionary files. We #define the stdio names to these versions | |
| 8 // in hnjalloc.h, so that we can use nsIURI and nsIInputStream to specify and | |
| 9 // access the dictionary resources. | |
| 10 | |
| 11 #include "hnjalloc.h" | |
| 12 #include "nsNetUtil.h" | |
| 13 | |
| 14 #define BUFSIZE 1024 | |
| 15 | |
| 16 struct hnjFile_ { | |
| 17 nsCOMPtr<nsIInputStream> mStream; | |
| 18 char mBuffer[BUFSIZE]; | |
| 19 uint32_t mCurPos; | |
| 20 uint32_t mLimit; | |
| 21 }; | |
| 22 | |
| 23 // replacement for fopen() | |
| 24 // (not a full substitute: only supports read access) | |
| 25 hnjFile* | |
| 26 hnjFopen(const char* aURISpec, const char* aMode) | |
| 27 { | |
| 28 // this override only needs to support "r" | |
| 29 NS_ASSERTION(!strcmp(aMode, "r"), "unsupported fopen() mode in hnjFopen"); | |
| 30 | |
| 31 nsCOMPtr<nsIURI> uri; | |
| 32 nsresult rv = NS_NewURI(getter_AddRefs(uri), aURISpec); | |
| 33 if (NS_FAILED(rv)) { | |
| 34 return nullptr; | |
| 35 } | |
| 36 | |
| 37 nsCOMPtr<nsIInputStream> instream; | |
| 38 rv = NS_OpenURI(getter_AddRefs(instream), uri); | |
| 39 if (NS_FAILED(rv)) { | |
| 40 return nullptr; | |
| 41 } | |
| 42 | |
| 43 hnjFile *f = new hnjFile; | |
| 44 f->mStream = instream; | |
| 45 f->mCurPos = 0; | |
| 46 f->mLimit = 0; | |
| 47 | |
| 48 return f; | |
| 49 } | |
| 50 | |
| 51 // replacement for fclose() | |
| 52 int | |
| 53 hnjFclose(hnjFile* f) | |
| 54 { | |
| 55 NS_ASSERTION(f && f->mStream, "bad argument to hnjFclose"); | |
| 56 | |
| 57 int result = 0; | |
| 58 nsresult rv = f->mStream->Close(); | |
| 59 if (NS_FAILED(rv)) { | |
| 60 result = EOF; | |
| 61 } | |
| 62 f->mStream = nullptr; | |
| 63 | |
| 64 delete f; | |
| 65 return result; | |
| 66 } | |
| 67 | |
| 68 // replacement for fgets() | |
| 69 // (not a full reimplementation, but sufficient for libhyphen's needs) | |
| 70 char* | |
| 71 hnjFgets(char* s, int n, hnjFile* f) | |
| 72 { | |
| 73 NS_ASSERTION(s && f, "bad argument to hnjFgets"); | |
| 74 | |
| 75 int i = 0; | |
| 76 while (i < n - 1) { | |
| 77 if (f->mCurPos < f->mLimit) { | |
| 78 char c = f->mBuffer[f->mCurPos++]; | |
| 79 s[i++] = c; | |
| 80 if (c == '\n' || c == '\r') { | |
| 81 break; | |
| 82 } | |
| 83 continue; | |
| 84 } | |
| 85 | |
| 86 f->mCurPos = 0; | |
| 87 | |
| 88 nsresult rv = f->mStream->Read(f->mBuffer, BUFSIZE, &f->mLimit); | |
| 89 if (NS_FAILED(rv)) { | |
| 90 f->mLimit = 0; | |
| 91 return nullptr; | |
| 92 } | |
| 93 | |
| 94 if (f->mLimit == 0) { | |
| 95 break; | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 if (i == 0) { | |
| 100 return nullptr; // end of file | |
| 101 } | |
| 102 | |
| 103 s[i] = '\0'; // null-terminate the returned string | |
| 104 return s; | |
| 105 } |
