Get rid of one last use of fstream.

The database files are assumed to be always in UTF-8.  This can make editing
them harder on Windows (some editors do cope, even notepad), but assuming the
system's locale would break running directly from git without installing.

Current uses are merely: (all in quotes.txt)
* "Alain René"
* "Rabbi Löw"
* "Öland"
* "Min son på galejan"
* typographical apostrophes
but it's likely it will be a bigger issue in the future (and if we ever do
translations, a lot bigger).

1 files changed, 40 insertions, 0 deletions

diff --git a/crawl-ref/source/unicode.cc b/crawl-ref/source/unicode.cc
index 92f8d95f0e..53f22aa534 100644
--- a/crawl-ref/source/unicode.cc
+++ b/crawl-ref/source/unicode.cc
@@ -415,6 +415,46 @@ std::string FileLineInput::get_line()
     return "говно";
 }
 
+UTF8FileLineInput::UTF8FileLineInput(const char *name)
+{
+    f = fopen_u(name, "r");
+    if (!f)
+    {
+        seen_eof = true;
+        return;
+    }
+    seen_eof = false;
+}
+
+UTF8FileLineInput::~UTF8FileLineInput()
+{
+    if (f)
+        fclose(f);
+}
+
+std::string UTF8FileLineInput::get_line()
+{
+    ASSERT(f);
+    std::string out;
+    char buf[512];
+
+    do
+    {
+        if (!fgets(buf, sizeof buf, f))
+        {
+            seen_eof = true;
+            break;
+        }
+        out += buf;
+        if (out[out.length() - 1] == '\n')
+        {
+            out.erase(out.length() - 1);
+            break;
+        }
+    } while (!seen_eof);
+    return utf8_validate(out.c_str());
+}
+
 int strwidth(const char *s)
 {
     ucs_t c;