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
--- /dev/null
+++ 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;
+}