tectonic/XeTeXLayoutInterface.cpp: merge contents of hz.cpp

The file hz.cpp was tiny and had a weird name, so I think it's nicer to just
merge it into a bigger file. XeTeXLayoutInterface.cpp works.

Author: pkgw

build.rs

@@ -256,7 +256,6 @@ fn main() {
     cppcfg
         .cpp(true)
         .file("tectonic/Engine.cpp")
-        .file("tectonic/hz.cpp")
         .file("tectonic/XeTeXFontInst.cpp")
         .file("tectonic/XeTeXFontMgr.cpp")
         .file("tectonic/XeTeXLayoutInterface.cpp")

tectonic/XeTeXLayoutInterface.cpp

@@ -97,6 +97,60 @@ cacheGlyphBBox(uint16_t fontID, uint16_t glyphID, const GlyphBBox* bbox)
     uint32_t key = ((uint32_t)fontID << 16) + glyphID;
     sGlyphBoxes[key] = *bbox;
 }
+
+/* The following code used to be in a file called "hz.cpp" and there's no
+ * particular reason for it to be here, but it was a tiny file with a weird
+ * name so I wanted to get rid of it. The functions are invoked from the C
+ * code. */
+
+typedef std::pair<int, unsigned int> GlyphId;
+typedef std::map<GlyphId, int>  ProtrusionFactor;
+ProtrusionFactor leftProt, rightProt;
+
+void
+set_cp_code(int fontNum, unsigned int code, int side, int value)
+{
+    GlyphId id(fontNum, code);
+
+    switch (side) {
+    case LEFT_SIDE:
+        leftProt[id] = value;
+        break;
+    case RIGHT_SIDE:
+        rightProt[id] = value;
+        break;
+    default:
+        assert(0); // we should not reach here
+    }
+}
+
+
+int
+get_cp_code(int fontNum, unsigned int code, int side)
+{
+    GlyphId id(fontNum, code);
+    ProtrusionFactor *container;
+
+    switch (side) {
+    case LEFT_SIDE:
+        container = &leftProt;
+        break;
+    case RIGHT_SIDE:
+        container = &rightProt;
+        break;
+    default:
+        assert(0); // we should not reach here
+    }
+
+    ProtrusionFactor::iterator it = container->find(id);
+    if (it == container->end())
+        return 0;
+
+    return it->second;
+}
+
+
+
 /*******************************************************************/
 
 void

tectonic/XeTeX_ext.h

@@ -161,8 +161,8 @@ int find_pic_file(char** path, real_rect* bounds, int pdfBoxType, int page);
 
 void terminate_font_manager(void);
 int maketexstring(const char* s);
-void set_cp_code(int fontNum, unsigned int code, int side, int value);
-int get_cp_code(int fontNum, unsigned int code, int side);
+extern void set_cp_code(int fontNum, unsigned int code, int side, int value);
+extern int get_cp_code(int fontNum, unsigned int code, int side);
 double Fix2D(Fixed f);
 Fixed D2Fix(double d);
 

tectonic/XeTeX_web.h

@@ -46,8 +46,6 @@ extern void print_char(int c);
 extern void begin_diagnostic(void);
 extern void end_diagnostic(int nl);
 extern int get_tracing_fonts_state(void);
-extern void set_cp_code(int, unsigned int, int, int);
-extern int get_cp_code(int, unsigned int, int);
 
 extern Fixed loaded_font_design_size;
 extern void **font_layout_engine;