[C][gegl][tool] show list of gegl operations

geglops.c

/* list operations by gegl: http://gegl.org/
 *
 * build:
 * gcc -Wall `pkg-config --cflags --libs gegl` geglops.c -o geglops
 *
 * usage:
 * ./geglops
 */
#include <glib.h>
#include <glib-object.h>
#include <glib/gprintf.h>
#include <gegl.h>

static void print_pspec(GParamSpec * pspec)
{
  GParamFlags flags = pspec->flags;
  GType vtype = pspec->value_type;

  g_printf("* %s : %s (",
           g_param_spec_get_name(pspec),
           g_type_name(vtype));
  if (flags & G_PARAM_READABLE) g_printf("R");
  if (flags & G_PARAM_WRITABLE) g_printf("W");
  if (flags & G_PARAM_CONSTRUCT) g_printf("C");
  if (flags & G_PARAM_CONSTRUCT_ONLY) g_printf("O");
  if (flags & G_PARAM_LAX_VALIDATION) g_printf("V");
  g_printf(")\n");
  g_printf(" <%s> %s\n",
           g_param_spec_get_nick(pspec),
           g_param_spec_get_blurb(pspec));
}


gint main(gint argc, gchar * argv[])
{
  gchar ** ops;
  guint oplen;
  gint i;

  gegl_init(&argc, &argv);

  ops = gegl_list_operations(&oplen);
  for (i=0; i < oplen; i++) {
    GParamSpec ** pspecs;
    guint pspeclen;
    gchar * op = ops[i];
    gboolean do_print = TRUE;
    gint j;

    for (j = 1; j < argc; j++) {
      do_print = (g_strcmp0(op, argv[j]) == 0);
      if (do_print) break;
    }
    if (!do_print) continue;

    pspecs = gegl_list_properties(op, &pspeclen);
    g_printf("[%s]\n", op);
    for (j = 0; j < pspeclen; j++) {
      print_pspec(pspecs[j]);
    }
    g_printf("\n");
  }
  g_free(ops);

  gegl_exit();
  return 0;
}