Fix some unused variable warnings.

[libsub.git] / src / util.cc

diff --git a/src/util.cc b/src/util.cc
index 5f4cd39c464e4c6cdcc221185242d86473104930..89af13fb0d33dd8820e338ebc9ec38b8d2f61d9c 100644 (file)
--- a/src/util.cc
+++ b/src/util.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2020 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -18,8 +18,23 @@
 */
 
 #include "util.h"
+#include "reader.h"
+#include "subtitle.h"
+#include "collect.h"
+#include <boost/shared_ptr.hpp>
+#include <string>
+#include <iostream>
+#include <cstdio>
+#include <map>
 
 using std::string;
+using std::getline;
+using std::ostream;
+using std::map;
+using std::list;
+using boost::optional;
+using boost::shared_ptr;
+using namespace sub;
 
 /** @param s A string.
  *  @return true if the string contains only space, newline or tab characters, or is empty.
@@ -35,3 +50,122 @@ sub::empty_or_white_space (string s)
 
        return true;
 }
+
+optional<string>
+sub::get_line_string (string* s)
+{
+       if (s->length() == 0) {
+               return optional<string>();
+       }
+
+       size_t pos = s->find ("\n");
+       if (pos == string::npos) {
+               string const c = *s;
+               *s = "";
+               return c;
+       }
+
+       string const c = s->substr (0, pos);
+       s->erase (0, pos + 1);
+       return c;
+}
+
+optional<string>
+sub::get_line_file (FILE* f)
+{
+       char buffer[256];
+       char* r = fgets (buffer, sizeof (buffer), f);
+       if (r == 0) {
+               return optional<string> ();
+       }
+
+       return string (buffer);
+}
+
+void
+sub::remove_unicode_bom (optional<string>& line)
+{
+       if (
+               line->length() >= 3 &&
+               static_cast<unsigned char> (line.get()[0]) == 0xef &&
+               static_cast<unsigned char> (line.get()[1]) == 0xbb &&
+               static_cast<unsigned char> (line.get()[2]) == 0xbf
+               ) {
+
+               /* Skip Unicode byte order mark */
+               line = line->substr (3);
+       }
+}
+
+void
+sub::dump (shared_ptr<const Reader> reader, ostream& os)
+{
+       map<string, string> metadata = reader->metadata ();
+       for (map<string, string>::const_iterator i = metadata.begin(); i != metadata.end(); ++i) {
+               os << i->first << ": " << i->second << "\n";
+       }
+
+       list<sub::Subtitle> subs = collect<list<sub::Subtitle> > (reader->subtitles ());
+       int n = 0;
+       for (list<sub::Subtitle>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
+               os << "Subtitle " << n << " at " << i->from << " -> " << i->to << "\n";
+               for (list<sub::Line>::const_iterator j = i->lines.begin(); j != i->lines.end(); ++j) {
+
+                       os << "\t";
+
+                       if (j->vertical_position.proportional) {
+                               os << j->vertical_position.proportional.get() << " of screen";
+                       } else if (j->vertical_position.line && j->vertical_position.lines) {
+                               os << j->vertical_position.line.get() << " lines of " << j->vertical_position.lines.get();
+                       }
+                       if (j->vertical_position.reference) {
+                               os << " from ";
+                               switch (j->vertical_position.reference.get()) {
+                               case TOP_OF_SCREEN:
+                                       os << "top";
+                                       break;
+                               case VERTICAL_CENTRE_OF_SCREEN:
+                                       os << "centre";
+                                       break;
+                               case BOTTOM_OF_SCREEN:
+                                       os << "bottom";
+                                       break;
+                               case TOP_OF_SUBTITLE:
+                                       os << "top of subtitle";
+                                       break;
+                               }
+                       }
+
+                       os << "\t";
+                       bool italic = false;
+                       bool underline = false;
+                       for (list<sub::Block>::const_iterator k = j->blocks.begin(); k != j->blocks.end(); ++k) {
+                               if (k->italic && !italic) {
+                                       os << "<i>";
+                               } else if (italic && !k->italic) {
+                                       os << "</i>";
+                               }
+                               if (k->underline && !underline) {
+                                       os << "<u>";
+                               } else if (underline && !k->underline) {
+                                       os << "</u>";
+                               }
+
+                               italic = k->italic;
+                               underline = k->underline;
+
+                               os << k->text;
+                       }
+
+                       if (italic) {
+                               os << "</i>";
+                       }
+                       if (underline) {
+                               os << "</u>";
+                       }
+                       os << "\n";
+               }
+
+               ++n;
+       }
+}