--- /dev/null
+/* -*-c-*-
+ *
+ * $Id: aunum.c,v 1.1 2002/02/02 19:16:28 mdw Exp $
+ *
+ * Reading numbers to audio output
+ *
+ * (c) 2002 Mark Wooding
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Jog: Programming for a jogging machine.
+ *
+ * Jog is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Jog 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jog; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: aunum.c,v $
+ * Revision 1.1 2002/02/02 19:16:28 mdw
+ * New audio subsystem.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <assert.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <mLib/dstr.h>
+
+#include "au.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @digit@ --- *
+ *
+ * Arguments: @char x@ = single digit to read
+ *
+ * Returns: ---
+ *
+ * Use: Reads a single digit.
+ */
+
+static void digit(int x)
+{
+ static char tagbuf[4] = "n-?";
+ tagbuf[2] = x;
+ au_play(tagbuf);
+}
+
+/* --- @digits@ --- *
+ *
+ * Arguments: @const char *p@ = pointer to digits
+ * @size_t n@ = number of digits
+ *
+ * Returns: ---
+ *
+ * Use: Reads a sequence of digits.
+ */
+
+static void digits(const char *p, size_t n)
+{
+ while (n) {
+ digit(*p++);
+ n--;
+ }
+}
+
+/* --- @lasttwo@ --- *
+ *
+ * Arguments: @const char *p@ = pointer to digits
+ * @size_t n@ = number of digits
+ * @unsigned f@ = flags
+ *
+ * Returns: Nonzero if the number was nonzero.
+ *
+ * Use: Reads out a number of no more than two digits.
+ */
+
+#define f_and 1u
+
+static int lasttwo(const char *p, size_t n, unsigned f)
+{
+ static char tagbuf[5] = "n-??";
+
+ while (n && *p == '0') {
+ n--;
+ p++;
+ }
+ if (!n)
+ return (0);
+
+ if (f & f_and)
+ au_play("n-and");
+ if (n == 1)
+ digit(*p);
+ else if (*p == '1') {
+ tagbuf[2] = p[0];
+ tagbuf[3] = p[1];
+ au_play(tagbuf);
+ } else {
+ tagbuf[2] = *p++;
+ tagbuf[3] = '0';
+ au_play(tagbuf);
+ if (*p != '0')
+ digit(*p);
+ }
+ return (1);
+}
+
+/* --- @bignum@ --- *
+ *
+ * Arguments: @const char *p@ = pointer to digits
+ * @size_t n@ = number of digits
+ *
+ * Returns: Nonzero if the number was nonzero.
+ *
+ * Use: Reads out a (large) integer in English.
+ */
+
+static int bignum(const char *p, size_t n)
+{
+ int nz = 0;
+ int rc;
+
+ if (n > 6) {
+ digits(p, n);
+ return (1);
+ }
+ if (n > 3) {
+ rc = bignum(p, n - 3);
+ p += n - 3;
+ n = 3;
+ if (rc) {
+ au_play("n-thou");
+ nz = 1;
+ }
+ }
+ if (n > 2) {
+ if (*p == '0') {
+ p++;
+ } else {
+ digit(*p++);
+ au_play("n-hun");
+ nz = 1;
+ }
+ n--;
+ }
+ return (lasttwo(p, n, nz ? f_and : 0) || nz);
+}
+
+/* --- @aunum@ --- *
+ *
+ * Arguments: @const char *p@ = pointer to number's textual representation
+ *
+ * Returns: ---
+ *
+ * Use: Reads the given number aloud.
+ */
+
+void aunum(const char *p)
+{
+ size_t pl;
+ int nz;
+
+ /* --- Pick off a leading sign --- */
+
+again:
+ if (*p == '+')
+ p++;
+ else if (*p == '-') {
+ au_play("n-minus");
+ p++;
+ }
+
+ /* --- Work out how many digits we have --- */
+
+ p += strspn(p, "0");
+ pl = strspn(p, "0123456789");
+ nz = bignum(p, pl);
+ p += pl;
+
+ /* --- If the value was zero, and there's no `point', say `zero' --- */
+
+ if (*p != '.' && !nz)
+ au_play("n-0");
+ if (*p == '.') {
+ au_play("n-point");
+ p++;
+ pl = strspn(p, "0123456789");
+ digits(p, pl);
+ p += pl;
+ }
+ if (*p == 'e' || *p == 'E') {
+ au_play("n-exp");
+ p++;
+ goto again;
+ }
+
+ /* --- Run out of things to do --- */
+
+ return;
+}
+
+/* --- @aunum_ulong@ --- *
+ *
+ * Arguments: @unsigned long n@ = number to be read
+ *
+ * Returns: ---
+ *
+ * Use: Reads a number expressed as an @unsigned long@.
+ */
+
+void aunum_ulong(unsigned long n)
+{
+ dstr d = DSTR_INIT;
+
+ dstr_putf(&d, "%lu", n);
+ aunum(d.buf);
+ dstr_destroy(&d);
+}
+
+/*----- That's all, folks -------------------------------------------------*/
~mdw / jog / blobdiff