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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'intl/hyphenation/glue/hnjstdio.cpp')
-rw-r--r--intl/hyphenation/glue/hnjstdio.cpp119
1 files changed, 119 insertions, 0 deletions
diff --git a/intl/hyphenation/glue/hnjstdio.cpp b/intl/hyphenation/glue/hnjstdio.cpp
new file mode 100644
index 000000000..660ebaf13
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+++ b/intl/hyphenation/glue/hnjstdio.cpp
@@ -0,0 +1,119 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This file provides substitutes for the basic stdio routines used by hyphen.c
+// to read its dictionary files. We #define the stdio names to these versions
+// in hnjalloc.h, so that we can use nsIURI and nsIInputStream to specify and
+// access the dictionary resources.
+
+#include "hnjalloc.h"
+#undef FILE // Undo the damage done in hnjalloc.h
+#include "nsNetUtil.h"
+#include "nsIInputStream.h"
+#include "nsIURI.h"
+#include "nsContentUtils.h"
+
+#define BUFSIZE 1024
+
+struct hnjFile_ {
+ nsCOMPtr<nsIInputStream> mStream;
+ char mBuffer[BUFSIZE];
+ uint32_t mCurPos;
+ uint32_t mLimit;
+};
+
+// replacement for fopen()
+// (not a full substitute: only supports read access)
+hnjFile*
+hnjFopen(const char* aURISpec, const char* aMode)
+{
+ // this override only needs to support "r"
+ NS_ASSERTION(!strcmp(aMode, "r"), "unsupported fopen() mode in hnjFopen");
+
+ nsCOMPtr<nsIURI> uri;
+ nsresult rv = NS_NewURI(getter_AddRefs(uri), aURISpec);
+ if (NS_FAILED(rv)) {
+ return nullptr;
+ }
+
+ nsCOMPtr<nsIChannel> channel;
+ rv = NS_NewChannel(getter_AddRefs(channel),
+ uri,
+ nsContentUtils::GetSystemPrincipal(),
+ nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
+ nsIContentPolicy::TYPE_OTHER);
+ if (NS_FAILED(rv)) {
+ return nullptr;
+ }
+
+ nsCOMPtr<nsIInputStream> instream;
+ rv = channel->Open2(getter_AddRefs(instream));
+ if (NS_FAILED(rv)) {
+ return nullptr;
+ }
+
+ hnjFile *f = new hnjFile;
+ f->mStream = instream;
+ f->mCurPos = 0;
+ f->mLimit = 0;
+
+ return f;
+}
+
+// replacement for fclose()
+int
+hnjFclose(hnjFile* f)
+{
+ NS_ASSERTION(f && f->mStream, "bad argument to hnjFclose");
+
+ int result = 0;
+ nsresult rv = f->mStream->Close();
+ if (NS_FAILED(rv)) {
+ result = EOF;
+ }
+ f->mStream = nullptr;
+
+ delete f;
+ return result;
+}
+
+// replacement for fgets()
+// (not a full reimplementation, but sufficient for libhyphen's needs)
+char*
+hnjFgets(char* s, int n, hnjFile* f)
+{
+ NS_ASSERTION(s && f, "bad argument to hnjFgets");
+
+ int i = 0;
+ while (i < n - 1) {
+ if (f->mCurPos < f->mLimit) {
+ char c = f->mBuffer[f->mCurPos++];
+ s[i++] = c;
+ if (c == '\n' || c == '\r') {
+ break;
+ }
+ continue;
+ }
+
+ f->mCurPos = 0;
+
+ nsresult rv = f->mStream->Read(f->mBuffer, BUFSIZE, &f->mLimit);
+ if (NS_FAILED(rv)) {
+ f->mLimit = 0;
+ return nullptr;
+ }
+
+ if (f->mLimit == 0) {
+ break;
+ }
+ }
+
+ if (i == 0) {
+ return nullptr; // end of file
+ }
+
+ s[i] = '\0'; // null-terminate the returned string
+ return s;
+}