--- /dev/null
+/* -*-c-*-
+ *
+ * $Id$
+ *
+ * Subcommand infrastructure
+ *
+ * (c) 2004 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <mLib/quis.h>
+#include <mLib/report.h>
+
+#include "cc.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @findcmd@ --- *
+ *
+ * Arguments: @const cmd *cmds@ = pointer to command table
+ * @const char *name@ = a command name
+ *
+ * Returns: Pointer to the command structure.
+ *
+ * Use: Looks up a command by name. If the command isn't found, an
+ * error is reported and the program is terminated.
+ */
+
+const cmd *findcmd(const cmd *cmds, const char *name)
+{
+ const cmd *c, *chosen = 0;
+ size_t sz = strlen(name);
+
+ for (c = cmds; c->name; c++) {
+ if (strncmp(name, c->name, sz) == 0) {
+ if (c->name[sz] == 0) {
+ chosen = c;
+ break;
+ } else if (chosen)
+ die(EXIT_FAILURE, "ambiguous command name `%s'", name);
+ else
+ chosen = c;
+ }
+ }
+ if (!chosen)
+ die(EXIT_FAILURE, "unknown command name `%s'", name);
+ return (chosen);
+}
+
+/* --- @sc_help@ --- *
+ *
+ * Arguments: @const cmd *cmds@ = pointer to command table
+ * @FILE *fp@ = output file handle
+ * @char *const *argv@ = remaining arguments
+ *
+ * Returns: ---
+ *
+ * Use: Prints a help message, maybe with help about subcommands.
+ */
+
+void sc_help(const cmd *cmds, FILE *fp, char *const *argv)
+{
+ const cmd *c;
+
+ version(fp);
+ fputc('\n', fp);
+ if (!*argv) {
+ help_global(fp);
+ fputs("\n\
+The following commands are understood:\n\n",
+ fp);
+ for (c = cmds; c->name; c++)
+ fprintf(fp, "%s\n", c->usage);
+ } else {
+ while (*argv) {
+ c = findcmd(cmds, *argv);
+ fprintf(fp, "Usage: %s [-OPTIONS] %s\n", QUIS, c->usage);
+ if (c->help) {
+ fputc('\n', fp);
+ pquis(fp, c->help);
+ }
+ argv++;
+ if (*argv) fputc('\n', fp);
+ }
+ }
+}
+
+/*----- That's all, folks -------------------------------------------------*/