e9060e7e |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: aunum.c,v 1.1 2002/02/02 19:16:28 mdw Exp $ |
4 | * |
5 | * Reading numbers to audio output |
6 | * |
7 | * (c) 2002 Mark Wooding |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Jog: Programming for a jogging machine. |
13 | * |
14 | * Jog is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by |
16 | * the Free Software Foundation; either version 2 of the License, or |
17 | * (at your option) any later version. |
18 | * |
19 | * Jog is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU General Public License |
25 | * along with Jog; if not, write to the Free Software Foundation, |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | */ |
28 | |
29 | /*----- Revision history --------------------------------------------------* |
30 | * |
31 | * $Log: aunum.c,v $ |
32 | * Revision 1.1 2002/02/02 19:16:28 mdw |
33 | * New audio subsystem. |
34 | * |
35 | */ |
36 | |
37 | /*----- Header files ------------------------------------------------------*/ |
38 | |
39 | #ifdef HAVE_CONFIG_H |
40 | # include "config.h" |
41 | #endif |
42 | |
43 | #include <assert.h> |
44 | #include <ctype.h> |
45 | #include <stdio.h> |
46 | #include <stdlib.h> |
47 | #include <string.h> |
48 | |
49 | #include <mLib/dstr.h> |
50 | |
51 | #include "au.h" |
52 | |
53 | /*----- Main code ---------------------------------------------------------*/ |
54 | |
55 | /* --- @digit@ --- * |
56 | * |
57 | * Arguments: @char x@ = single digit to read |
58 | * |
59 | * Returns: --- |
60 | * |
61 | * Use: Reads a single digit. |
62 | */ |
63 | |
64 | static void digit(int x) |
65 | { |
66 | static char tagbuf[4] = "n-?"; |
67 | tagbuf[2] = x; |
68 | au_play(tagbuf); |
69 | } |
70 | |
71 | /* --- @digits@ --- * |
72 | * |
73 | * Arguments: @const char *p@ = pointer to digits |
74 | * @size_t n@ = number of digits |
75 | * |
76 | * Returns: --- |
77 | * |
78 | * Use: Reads a sequence of digits. |
79 | */ |
80 | |
81 | static void digits(const char *p, size_t n) |
82 | { |
83 | while (n) { |
84 | digit(*p++); |
85 | n--; |
86 | } |
87 | } |
88 | |
89 | /* --- @lasttwo@ --- * |
90 | * |
91 | * Arguments: @const char *p@ = pointer to digits |
92 | * @size_t n@ = number of digits |
93 | * @unsigned f@ = flags |
94 | * |
95 | * Returns: Nonzero if the number was nonzero. |
96 | * |
97 | * Use: Reads out a number of no more than two digits. |
98 | */ |
99 | |
100 | #define f_and 1u |
101 | |
102 | static int lasttwo(const char *p, size_t n, unsigned f) |
103 | { |
104 | static char tagbuf[5] = "n-??"; |
105 | |
106 | while (n && *p == '0') { |
107 | n--; |
108 | p++; |
109 | } |
110 | if (!n) |
111 | return (0); |
112 | |
113 | if (f & f_and) |
114 | au_play("n-and"); |
115 | if (n == 1) |
116 | digit(*p); |
117 | else if (*p == '1') { |
118 | tagbuf[2] = p[0]; |
119 | tagbuf[3] = p[1]; |
120 | au_play(tagbuf); |
121 | } else { |
122 | tagbuf[2] = *p++; |
123 | tagbuf[3] = '0'; |
124 | au_play(tagbuf); |
125 | if (*p != '0') |
126 | digit(*p); |
127 | } |
128 | return (1); |
129 | } |
130 | |
131 | /* --- @bignum@ --- * |
132 | * |
133 | * Arguments: @const char *p@ = pointer to digits |
134 | * @size_t n@ = number of digits |
135 | * |
136 | * Returns: Nonzero if the number was nonzero. |
137 | * |
138 | * Use: Reads out a (large) integer in English. |
139 | */ |
140 | |
141 | static int bignum(const char *p, size_t n) |
142 | { |
143 | int nz = 0; |
144 | int rc; |
145 | |
146 | if (n > 6) { |
147 | digits(p, n); |
148 | return (1); |
149 | } |
150 | if (n > 3) { |
151 | rc = bignum(p, n - 3); |
152 | p += n - 3; |
153 | n = 3; |
154 | if (rc) { |
155 | au_play("n-thou"); |
156 | nz = 1; |
157 | } |
158 | } |
159 | if (n > 2) { |
160 | if (*p == '0') { |
161 | p++; |
162 | } else { |
163 | digit(*p++); |
164 | au_play("n-hun"); |
165 | nz = 1; |
166 | } |
167 | n--; |
168 | } |
169 | return (lasttwo(p, n, nz ? f_and : 0) || nz); |
170 | } |
171 | |
172 | /* --- @aunum@ --- * |
173 | * |
174 | * Arguments: @const char *p@ = pointer to number's textual representation |
175 | * |
176 | * Returns: --- |
177 | * |
178 | * Use: Reads the given number aloud. |
179 | */ |
180 | |
181 | void aunum(const char *p) |
182 | { |
183 | size_t pl; |
184 | int nz; |
185 | |
186 | /* --- Pick off a leading sign --- */ |
187 | |
188 | again: |
189 | if (*p == '+') |
190 | p++; |
191 | else if (*p == '-') { |
192 | au_play("n-minus"); |
193 | p++; |
194 | } |
195 | |
196 | /* --- Work out how many digits we have --- */ |
197 | |
198 | p += strspn(p, "0"); |
199 | pl = strspn(p, "0123456789"); |
200 | nz = bignum(p, pl); |
201 | p += pl; |
202 | |
203 | /* --- If the value was zero, and there's no `point', say `zero' --- */ |
204 | |
205 | if (*p != '.' && !nz) |
206 | au_play("n-0"); |
207 | if (*p == '.') { |
208 | au_play("n-point"); |
209 | p++; |
210 | pl = strspn(p, "0123456789"); |
211 | digits(p, pl); |
212 | p += pl; |
213 | } |
214 | if (*p == 'e' || *p == 'E') { |
215 | au_play("n-exp"); |
216 | p++; |
217 | goto again; |
218 | } |
219 | |
220 | /* --- Run out of things to do --- */ |
221 | |
222 | return; |
223 | } |
224 | |
225 | /* --- @aunum_ulong@ --- * |
226 | * |
227 | * Arguments: @unsigned long n@ = number to be read |
228 | * |
229 | * Returns: --- |
230 | * |
231 | * Use: Reads a number expressed as an @unsigned long@. |
232 | */ |
233 | |
234 | void aunum_ulong(unsigned long n) |
235 | { |
236 | dstr d = DSTR_INIT; |
237 | |
238 | dstr_putf(&d, "%lu", n); |
239 | aunum(d.buf); |
240 | dstr_destroy(&d); |
241 | } |
242 | |
243 | /*----- That's all, folks -------------------------------------------------*/ |