1 files changed, 70 insertions, 0 deletions
diff --git a/util/gapcalc.c b/util/gapcalc.c
new file mode 100644
index 0000000..4a4c3db
--- /dev/null
+++ b/util/gapcalc.c
@@ -0,0 +1,70 @@
+/*  gapcalc - calculate height of given font
+ *  Copyright (C) 2007 by Robert Manea  <rob.manea@gmail.com>
+ *
+ *  Compile with: cc -lX11 -o gapcalc gapcalc.c
+ */
+
+#include<stdio.h>
+#include<stdlib.h>
+#include<stdarg.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+void 
+eprint(const char *errstr, ...) {
+    va_list ap;
+
+    va_start(ap, errstr);
+    vfprintf(stderr, errstr, ap);
+    va_end(ap);
+    exit(EXIT_FAILURE);
+}
+
+
+int 
+main(int argc, char *argv[]) {
+    Display *dpy;    
+    XFontStruct *xfont;
+    XFontSet set;
+    char *def, **missing;
+    char *fontstr;
+    int i, n, ascent, descent;
+
+    if(argc < 2)
+        eprint("Usage: gapcalc <font>\n");
+
+    if(!(dpy = XOpenDisplay(0)))
+        eprint("fatal: cannot open display\n");
+
+    fontstr = argv[1];
+    missing = NULL;
+
+    set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
+    if(missing)
+        XFreeStringList(missing);
+    if(set) {
+        XFontSetExtents *font_extents;
+        XFontStruct **xfonts;
+        char **font_names;
+        ascent = descent = 0;
+        font_extents = XExtentsOfFontSet(set);
+        n = XFontsOfFontSet(set, &xfonts, &font_names);
+        for(i = 0, ascent = 0, descent = 0; i < n; i++) {
+            if(ascent < (*xfonts)->ascent)
+                ascent = (*xfonts)->ascent;
+            if(descent < (*xfonts)->descent)
+                descent = (*xfonts)->descent;
+            xfonts++;
+        }
+    } else if(!set && (xfont = XLoadQueryFont(dpy, fontstr))) {
+        ascent = xfont->ascent;
+        descent = xfont->descent;
+    } else 
+        eprint("fatal: cannot find specified font\n");
+
+    printf("%d\n", ascent + descent + 2);
+
+  
+  return EXIT_SUCCESS;
+}
+