Fix and improve link, fix typos

AUTHORS

@@ -24,5 +24,5 @@ Alexander Peslyak
 
 Peter Selinger
 	libs/potrace/*
-	http://potrace.sourceforge.net
+	https://potrace.sourceforge.net
 

NEWS

@@ -987,7 +987,7 @@ dvisvgm-0.5 (2007-03-26)
 - command-line option -m has been renamed to -M
 - added command-line options -m/--map-file and -n/--no-mktexmf
 - memory bug in StreamCounter class has been fixed
-- added sources of Peter Selinger's potrace library (part of potrace, http://potrace.sourceforge.net)
+- added sources of Peter Selinger's potrace library (part of potrace, https://potrace.sourceforge.net)
   to simplify the build process
 
 dvisvgm-0.4.3 (2007-01-03)

README

@@ -9,12 +9,12 @@ DESCRIPTION
 DEPENDENCIES
 
  dvisvgm relies on the following free libraries:
- * Clipper (http://www.angusj.com/delphi/clipper.php)
+ * Clipper (https://www.angusj.com/delphi/clipper/documentation/Docs/Overview/_Body.htm)
    To compute the intersections of two curved paths, dvisvgm flattens the paths
    to polygons, intersects them using Clipper, and reconstructs the curves
    afterwards.
 
- * FreeType 2 (http://www.freetype.org)
+ * FreeType 2 (https://freetype.org)
    This library is used to extract the glyph outlines from vector fonts
    (PFB, OTF, TTF).
 
@@ -34,7 +34,7 @@ DEPENDENCIES
    searching files in the large texmf tree. Please ensure that you use the
    kpathsea version coming with or matching your TeX system.
 
- * potracelib (http://potrace.sourceforge.net)
+ * potracelib (https://potrace.sourceforge.net)
    Peter Selinger's bitmap tracing library is utilized to vectorize Metafont's
    bitmap output. A recent version is also part of the dvisvgm sources.
 
@@ -55,7 +55,7 @@ DEPENDENCIES
    store them in a compact way together with their Unicode points. A recent
    version of xxHash is bundled with the dvisvgm sources.
 
- * zlib (http://www.zlib.org)
+ * zlib (https://www.zlib.net)
    This library is required to create compressed SVGZ files.
 
 

README.md

@@ -17,7 +17,7 @@ _dvisvgm_ is a utility for TeX/LaTeX users. It converts
 XML-based scalable vector graphics format [SVG](https://www.w3.org/TR/SVG).
 The latest releases support standard DVI files (version 2) as well as DVI output
 created by [pTeX](https://ctan.org/pkg/ptex) in vertical mode (version 3),
-and [XeTeX](http://scripts.sil.org/xetex) (versions 5 to 7, also known as XDV).
+and [XeTeX](https://xetex.sourceforge.net) (versions 5 to 7, also known as XDV).
 
 To get an impression of the conversion results, have a look at the
 [examples](https://dvisvgm.de/Examples) created with _dvisvgm_.
@@ -53,12 +53,12 @@ Dependencies
 
 _dvisvgm_ relies on the following free libraries:
 
-* [Clipper](http://www.angusj.com/delphi/clipper.php)  
+* [Clipper](https://www.angusj.com/delphi/clipper/documentation/Docs/Overview/_Body.htm)  
   To compute the intersection of two curved paths, _dvisvgm_ flattens the paths to
   polygons, intersects them using a slightly modified version of Clipper, and reconstructs
   the curves afterwards. A slightly modified version of Clipper is bundled with the sources.
 
-* [FreeType 2](https://www.freetype.org)  
+* [FreeType 2](https://freetype.org)  
   This library is used to extract the glyph outlines from vector fonts (PFB, OTF, TTF).
 
 * [Ghostscript](https://www.ghostscript.com)  
@@ -76,7 +76,7 @@ _dvisvgm_ relies on the following free libraries:
   files in the large `texmf` tree. Please ensure that you use the kpathsea version
   coming with or matching your TeX system.
 
-* [potracelib](http://potrace.sourceforge.net)  
+* [potracelib](https://potrace.sourceforge.net)  
   Peter Selinger's bitmap tracing library is utilized to vectorize Metafont's
   bitmap output. It's also bundled with the _dvisvgm_ sources.
 
@@ -96,14 +96,14 @@ _dvisvgm_ relies on the following free libraries:
   a compact way together with their Unicode points. A recent version of xxHash is
   bundled with the _dvisvgm_ sources.
 
-* [zlib](http://www.zlib.org)  
+* [zlib](https://www.zlib.net)  
   This library is required to create compressed [SVGZ](https://en.wikipedia.org/wiki/Scalable_Vector_Graphics#Compression) files.
 
 
 Building dvisvgm from source
 ----------------------------
 
-_dvisvgm_ is written in C++11 ([ISO C++ standard 2011](http://www.iso.org/iso/catalogue_detail.htm?csnumber=50372))
+_dvisvgm_ is written in C++11 ([ISO C++ standard 2011](https://www.iso.org/standard/83626.html))
 and requires an appropriate compiler, like [GCC](https://gcc.gnu.org) 4.9, [Clang](https://clang.llvm.org) 3.3,
 or any later version. The configure script checks for the availability of C++11 support and
 adds the proper compiler options if necessary.

configure.ac

@@ -160,7 +160,7 @@ AX_GCC_BUILTIN(__builtin_clz)
 
 # add options for selection of "optional" library locations
 # currently these libraries are mandatory; the --with-foo options
-# are used to specify the locations explicitely
+# are used to specify the locations explicitly
 
 AC_ARG_WITH(zlib,
 	[AS_HELP_STRING([--with-zlib=DIR], [set location of the zlib library])],

src/DVIReader.cpp

@@ -197,7 +197,7 @@ void DVIReader::cmdPop (int) {
 }
 
 
-/** Helper function that handles charaters from virtual fonts (VF).
+/** Helper function that handles characters from virtual fonts (VF).
  *  It is called by the cmdSetChar and cmdPutChar methods.
  *  @param[in] font current font (corresponding to _currFontNum)
  *  @param[in] c character to typeset */
@@ -243,7 +243,7 @@ void DVIReader::putVFChar (Font *font, uint32_t c) {
 /** Reads and executes set_char_x command. Puts a character at the current
  *  position and advances the cursor.
  *  @param[in] c character to set
- *  @throw DVIException if method is called ouside a bop/eop pair */
+ *  @throw DVIException if method is called outside a bop/eop pair */
 void DVIReader::cmdSetChar0 (int c) {
 	if (!_inPage)
 		throw DVIException("setchar outside of page");
@@ -257,7 +257,7 @@ void DVIReader::cmdSetChar0 (int c) {
 /** Reads and executes setx command. Puts a character at the current
  *  position and advances the cursor.
  *  @param[in] len number of parameter bytes (possible values: 1-4)
- *  @throw DVIException if method is called ouside a bop/eop pair */
+ *  @throw DVIException if method is called outside a bop/eop pair */
 void DVIReader::cmdSetChar (int len) {
 	if (!_inPage)
 		throw DVIException("setchar outside of page");
@@ -274,7 +274,7 @@ void DVIReader::cmdSetChar (int len) {
 /** Reads and executes putx command. Puts a character at the current
  *  position but doesn't change the cursor position.
  *  @param[in] len number of parameter bytes (possible values: 1-4)
- *  @throw DVIException if method is called ouside a bop/eop pair */
+ *  @throw DVIException if method is called outside a bop/eop pair */
 void DVIReader::cmdPutChar (int len) {
 	if (!_inPage)
 		throw DVIException("putchar outside of page");
@@ -290,7 +290,7 @@ void DVIReader::cmdPutChar (int len) {
 /** Reads and executes set_rule command. Puts a solid rectangle at the current
  *  position and updates the cursor position.
  *  Format: set_rule h[+4] w[+4]
- *  @throw DVIException if method is called ouside a bop/eop pair */
+ *  @throw DVIException if method is called outside a bop/eop pair */
 void DVIReader::cmdSetRule (int) {
 	if (!_inPage)
 		throw DVIException("set_rule outside of page");
@@ -304,7 +304,7 @@ void DVIReader::cmdSetRule (int) {
 /** Reads and executes set_rule command. Puts a solid rectangle at the current
  *  position but leaves the cursor position unchanged.
  *  Format: put_rule h[+4] w[+4]
- *  @throw DVIException if method is called ouside a bop/eop pair */
+ *  @throw DVIException if method is called outside a bop/eop pair */
 void DVIReader::cmdPutRule (int) {
 	if (!_inPage)
 		throw DVIException("put_rule outside of page");

src/DvisvgmSpecialHandler.cpp

@@ -382,26 +382,26 @@ void DvisvgmSpecialHandler::processImg (InputReader &ir, SpecialActions &actions
 			Message::wstream(true) << "file '" << fname << "' not found\n";
 
 		update_bbox(width, height, Length(0), true, actions);
-		auto imgageNode = util::make_unique<SVGElement>("image");
-		imgageNode->addAttribute("x", actions.getX());
-		imgageNode->addAttribute("y", actions.getY()-height.bp());
-		imgageNode->addAttribute("width", width.bp());
-		imgageNode->addAttribute("height", height.bp());
+		auto imageNode = util::make_unique<SVGElement>("image");
+		imageNode->addAttribute("x", actions.getX());
+		imageNode->addAttribute("y", actions.getY()-height.bp());
+		imageNode->addAttribute("width", width.bp());
+		imageNode->addAttribute("height", height.bp());
 
 		string mimetype = util::mimetype(fname);
 		if (SVGTree::EMBED_BITMAP_DATA && (mimetype == "image/jpeg" || mimetype == "image/png"))
-			imgageNode->addAttribute("@@xlink:href", "data:"+mimetype+";base64,"+fname);
+			imageNode->addAttribute("@@xlink:href", "data:"+mimetype+";base64,"+fname);
 		else {
 			string href = fname;
 			// Only reference the image with an absolute path if either an absolute path was given by the user
 			// or a given plain filename is not present in the current working directory but was found through
 			// the FileFinder, i.e. it's usually located somewhere in the texmf tree.
 			if (!FilePath::isAbsolute(fname) && (fname.find('/') != string::npos || FilePath(fname).exists()))
 				href = FilePath(pathstr).relative(FilePath(actions.getSVGFilePath(1)));
-			imgageNode->addAttribute("xlink:href", href);
+			imageNode->addAttribute("xlink:href", href);
 		}
-		imgageNode->setTransform(actions.getMatrix());
-		actions.svgTree().appendToPage(std::move(imgageNode));
+		imageNode->setTransform(actions.getMatrix());
+		actions.svgTree().appendToPage(std::move(imageNode));
 	}
 	catch (const UnitException &e) {
 		throw SpecialException(string("dvisvgm:img: ") + e.what());

src/DvisvgmSpecialHandler.hpp

@@ -37,7 +37,7 @@ class XMLNode;
 
 #ifdef _MSC_VER
 // MSVC: Prevent aggressive optimization of pointers to member functions.
-// Instatiating class DvisvgmSpecialHandler without the following pragma
+// Instantiating class DvisvgmSpecialHandler without the following pragma
 // leads to memory corruption.
 // https://docs.microsoft.com/en-us/cpp/preprocessor/pointers-to-members
 #pragma pointers_to_members(full_generality, single_inheritance)

src/Font.cpp

@@ -436,7 +436,7 @@ int PhysicalFont::traceAllGlyphs (bool includeCached, GFGlyphTracer::Callback *c
 /** Computes the exact bounding box of a glyph.
  *  @param[in]  c character code of the glyph
  *  @param[out] bbox the computed bounding box
- *  @param[in]  cb optional calback object forwarded to the tracer
+ *  @param[in]  cb optional callback object forwarded to the tracer
  *  @return true if the box could be computed successfully */
 bool PhysicalFont::getExactGlyphBox (int c, BoundingBox& bbox, GFGlyphTracer::Callback* cb) const {
 	Glyph glyph;

src/FontEngine.cpp

@@ -330,7 +330,7 @@ int FontEngine::getNumGlyphs () const {
 }
 
 
-/** Returns the glyph name for a given charater code.
+/** Returns the glyph name for a given character code.
  * @param[in] c char code
  * @return glyph name */
 string FontEngine::getGlyphName (const Character &c) const {

src/Ghostscript.cpp

@@ -323,7 +323,7 @@ int Ghostscript::set_stdio (Stdin in, Stdout out, Stderr err) {
 
 /** Initializes Ghostscript with a set of optional parameters. This
  *  method is called by the constructor and should not be used elsewhere.
- *  @param[in] argc number of paramters
+ *  @param[in] argc number of parameters
  *  @param[in] argv parameters passed to Ghostscript */
 int Ghostscript::init_with_args (int argc, char **argv) {
 #if defined(HAVE_LIBGS)

src/HtmlSpecialHandler.cpp

@@ -34,7 +34,7 @@ void HtmlSpecialHandler::preprocess (const string&, istream &is, SpecialActions
 	if (ir.check("<a ") && ir.parseAttributes(attribs, true, "\"") > 0) {
 		map<string,string>::iterator it;
 		if ((it = attribs.find("name")) != attribs.end())
-			HyperlinkManager::instance().addNameAchor(it->second, actions.getCurrentPageNumber());
+			HyperlinkManager::instance().addNameAnchor(it->second, actions.getCurrentPageNumber());
 		else if ((it = attribs.find("href")) != attribs.end())
 			HyperlinkManager::instance().addHrefAnchor(it->second);
 	}

src/HyperlinkManager.cpp

@@ -55,7 +55,7 @@ void HyperlinkManager::addHrefAnchor (const string &uri) {
 }
 
 
-void HyperlinkManager::addNameAchor (const string &name, int pageno) {
+void HyperlinkManager::addNameAnchor (const string &name, int pageno) {
 	if (name.empty())
 		return;
 	auto it = _namedAnchors.find(name);

src/HyperlinkManager.hpp

@@ -46,7 +46,7 @@ class HyperlinkManager {
 		HyperlinkManager (const HyperlinkManager&) =delete;
 		HyperlinkManager (HyperlinkManager&&) =delete;
 		void addHrefAnchor (const std::string &uri);
-		void addNameAchor (const std::string &name, int pageno);
+		void addNameAnchor (const std::string &name, int pageno);
 		void setActiveNameAnchor (const std::string &name, SpecialActions &actions);
 		void closeAnchor (SpecialActions &actions);
 		void checkNewLine (SpecialActions &actions);

src/PDFParser.cpp

@@ -202,7 +202,7 @@ using NumberVariant = mpark::variant<int, double>;
 /** Parses a PDF number from a string. The number is either integer or real.
  *  @param[in] str string to parse
  *  @param[out] nv variant holding the numeric value
- *  @return true if entire string has been parsed succesfully */
+ *  @return true if entire string has been parsed successfully */
 static bool parse_number (const string &str, NumberVariant &nv) {
 	if (str.empty())
 		return false;

src/PSPattern.hpp

@@ -48,7 +48,7 @@ class PSPattern {
 		virtual std::unique_ptr<XMLElement> createPatternNode () const =0;
 
 	private:
-		int _id;  ///< PostSCript ID of this pattern
+		int _id;  ///< PostScript ID of this pattern
 };
 
 
@@ -70,7 +70,7 @@ class PSTilingPattern : public PSPattern {
 	private:
 		BoundingBox _bbox;           ///< bounding box of the tile graphics
 		Matrix _matrix;              ///< tile transformation
-		double _xstep, _ystep;       ///< horizontal and vertical distance between neighboured tiles
+		double _xstep, _ystep;       ///< horizontal and vertical distance between neighbouring tiles
 		mutable std::unique_ptr<XMLElement> _groupNode;  ///< group containing the drawing elements
 		XMLElement *_groupNodePtr; ///< keeps a pointer to the group node even after moving _groupNode to the SVGTree
 };

src/PdfSpecialHandler.cpp

@@ -157,7 +157,7 @@ void PdfSpecialHandler::preprocessDest (StreamInputReader &ir, SpecialActions &a
 	// get target info from array [pageno /XYZ xpos ypos zpos]
 	if (name && dest && dest->size() >= 4 && dest->at(0).get<int>()) {
 		int pageno = *dest->at(0).get<int>();
-		HyperlinkManager::instance().addNameAchor(*name, pageno);
+		HyperlinkManager::instance().addNameAnchor(*name, pageno);
 	}
 }
 

src/VFReader.cpp

@@ -108,7 +108,7 @@ void VFReader::cmdPre () {
 	uint32_t i = readUnsigned(1);  // identification number (should be 2)
 	uint32_t k = readUnsigned(1);  // length of following comment
 	string cmt = readString(k);    // comment
-	uint32_t cs = readUnsigned(4); // check sum to be compared with TFM cecksum
+	uint32_t cs = readUnsigned(4); // check sum to be compared with TFM checksum
 	int32_t ds = readUnsigned(4);  // design size (same as TFM design size) (fix_word)
 	_designSize = double(FixWord(ds))*Length::pt2bp;
 	if (i != 202)

src/XMLParser.cpp

@@ -52,7 +52,7 @@ static string::size_type find_end_of_tag (const string &str, string::size_type s
 	char attrval_delim = 0;
 	bool expect_attrval = false;
 	for (auto i=startpos; i < str.length(); i++) {
-		if (attrval_delim) {  // inside attrubute value?
+		if (attrval_delim) {  // inside attribute value?
 			if (str[i] == attrval_delim)  // end of attribute value?
 				attrval_delim = 0;
 		}

src/optimizer/TransformSimplifier.cpp

@@ -80,7 +80,7 @@ bool TransformSimplifier::incorporateTransform (XMLElement *elem, const Matrix &
 			y = strtod(ystr, nullptr);
 		// width and height attributes must not become negative. Hence, only apply the scaling
 		// values if they are non-negative. Otherwise, keep a scaling matrix. Also retain scaling
-		// transformations in image elements to avoid the need of attribute 'preseveAspectRatio'.
+		// transformations in image elements to avoid the need of attribute 'preserveAspectRatio'.
 		if (sx < 0 || sy < 0 || elem->name() == "image") {
 			x += (sx == 0 ? 0 : tx/sx);
 			y += (sy == 0 ? 0 : ty/sy);

src/ttf/GlyfTable.cpp

@@ -144,7 +144,7 @@ void Contour::reduceNumberOfPoints () {
 
 /** Bits of the "Simple Glyph Flags". See section "Simple Glyph Description" of glyf table documentation. */
 enum : uint8_t {
-	ON_CURVE_PT = 1,   ///< if set, corresponing point is on the curve, otherwise off the curve (= control point)
+	ON_CURVE_PT = 1,   ///< if set, corresponding point is on the curve, otherwise off the curve (= control point)
 	X_SHORT = 2,       ///< if set, the corresponding x-coordinate is 1 byte long, otherwise it's two bytes long
 	Y_SHORT = 4,       ///< if set, the corresponding y-coordinate is 1 byte long, otherwise it's two bytes long
 	REPEAT_FLAG = 8,   ///< if set, the next byte specifies the number of additional times this flag is to be repeated

src/ttf/NameTable.cpp

@@ -50,8 +50,8 @@ enum NameID {
 	PS_CID_FINDFONT_NAME = 20,
 	WWS_FAMILY_NAME = 21,
 	WWS_SUBFAMILY_NAME = 22,
-	LIGHT_BG_PALLETTE = 23,
-	DARK_BG_PALLETTE = 24,
+	LIGHT_BG_PALETTE = 23,
+	DARK_BG_PALETTE = 24,
 	VAR_PS_NAME_PREFIX = 25
 };
 

src/utility.cpp

@@ -207,7 +207,7 @@ int util::ilog10 (int n) {
  *  @param[in] is stream to read from
  *  @param[out] str the read string is appended to this one
  *  @param[in] allow_leading_sign true if the first character may be '+' or '-'
- *  @return true if the string coule be read successfully */
+ *  @return true if the string could be read successfully */
 static bool read_int_string (istream &is, string &str, bool allow_leading_sign=true) {
 	string intstr;
 	if (is.peek() == '-' || is.peek() == '+') {