#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <pango/pango.h>
#include <pango/pangocairo.h>

// #define PRINT_RESULTS
#define NUM_RUNS 2048

void do_work (gchar *text, PangoContext *context)
{
    int linenum = 0;
    for(;;) {
        gchar *start = text;
        int length = 0;

        while (start [length] != '\n' && start [length]) {
            length++;
        }
        if (!start [length]) return;

        if (length) {
            PangoLayout *layout;
            PangoRectangle ink_rect, logical_rect;
#ifdef PRINT_RESULTS
            int i;
            printf ("Line %d [%d]: ", linenum, length);
            for (i = 0; i < length; i++) printf ("%c", start [i]);
            printf ("\n");
#endif

            layout = pango_layout_new (context);
            pango_layout_set_text (layout, start, length);
            pango_layout_get_extents (layout, &ink_rect, &logical_rect);
            g_object_unref (layout);

#ifdef PRINT_RESULTS
            printf ("Line %d [%d]: Ink %d,%d %dx%d   Logical %d,%d %dx%d\n",
                    linenum, length,
                    ink_rect.x, ink_rect.y, ink_rect.width, ink_rect.height,
                    logical_rect.x, logical_rect.y, logical_rect.width, logical_rect.height);
#endif
        }

        text += length + 1;
        linenum++;
    }
}

int main (int argc, char **argv)
{
    PangoFontMap *fontmap;
    PangoContext *context;
    gchar *text;
    int i;

    fontmap = pango_cairo_font_map_get_default ();
    context = pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fontmap));

    if (!g_file_get_contents (argv [1], &text, NULL, NULL)) {
        fprintf (stderr, "Cannot open input file %s\n", argv [1]);
        return 1;
    }

    for (i = 0; i < NUM_RUNS; i++)
        do_work (text, context);

    g_free (text);
    return 0;
}