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 | |
e9060e7e |
29 | /*----- Header files ------------------------------------------------------*/ |
30 | |
31 | #ifdef HAVE_CONFIG_H |
32 | # include "config.h" |
33 | #endif |
34 | |
35 | #include <assert.h> |
36 | #include <ctype.h> |
37 | #include <stdio.h> |
38 | #include <stdlib.h> |
39 | #include <string.h> |
40 | |
41 | #include <mLib/dstr.h> |
42 | |
43 | #include "au.h" |
44 | |
45 | /*----- Main code ---------------------------------------------------------*/ |
46 | |
47 | /* --- @digit@ --- * |
48 | * |
49 | * Arguments: @char x@ = single digit to read |
50 | * |
51 | * Returns: --- |
52 | * |
53 | * Use: Reads a single digit. |
54 | */ |
55 | |
56 | static void digit(int x) |
57 | { |
58 | static char tagbuf[4] = "n-?"; |
59 | tagbuf[2] = x; |
60 | au_play(tagbuf); |
61 | } |
62 | |
63 | /* --- @digits@ --- * |
64 | * |
65 | * Arguments: @const char *p@ = pointer to digits |
66 | * @size_t n@ = number of digits |
67 | * |
68 | * Returns: --- |
69 | * |
70 | * Use: Reads a sequence of digits. |
71 | */ |
72 | |
73 | static void digits(const char *p, size_t n) |
74 | { |
75 | while (n) { |
76 | digit(*p++); |
77 | n--; |
78 | } |
79 | } |
80 | |
81 | /* --- @lasttwo@ --- * |
82 | * |
83 | * Arguments: @const char *p@ = pointer to digits |
84 | * @size_t n@ = number of digits |
85 | * @unsigned f@ = flags |
86 | * |
87 | * Returns: Nonzero if the number was nonzero. |
88 | * |
89 | * Use: Reads out a number of no more than two digits. |
90 | */ |
91 | |
92 | #define f_and 1u |
93 | |
94 | static int lasttwo(const char *p, size_t n, unsigned f) |
95 | { |
96 | static char tagbuf[5] = "n-??"; |
97 | |
98 | while (n && *p == '0') { |
99 | n--; |
100 | p++; |
101 | } |
102 | if (!n) |
103 | return (0); |
104 | |
105 | if (f & f_and) |
106 | au_play("n-and"); |
107 | if (n == 1) |
108 | digit(*p); |
109 | else if (*p == '1') { |
110 | tagbuf[2] = p[0]; |
111 | tagbuf[3] = p[1]; |
112 | au_play(tagbuf); |
113 | } else { |
114 | tagbuf[2] = *p++; |
115 | tagbuf[3] = '0'; |
116 | au_play(tagbuf); |
117 | if (*p != '0') |
118 | digit(*p); |
119 | } |
120 | return (1); |
121 | } |
122 | |
123 | /* --- @bignum@ --- * |
124 | * |
125 | * Arguments: @const char *p@ = pointer to digits |
126 | * @size_t n@ = number of digits |
127 | * |
128 | * Returns: Nonzero if the number was nonzero. |
129 | * |
130 | * Use: Reads out a (large) integer in English. |
131 | */ |
132 | |
133 | static int bignum(const char *p, size_t n) |
134 | { |
135 | int nz = 0; |
136 | int rc; |
137 | |
138 | if (n > 6) { |
139 | digits(p, n); |
140 | return (1); |
141 | } |
142 | if (n > 3) { |
143 | rc = bignum(p, n - 3); |
144 | p += n - 3; |
145 | n = 3; |
146 | if (rc) { |
147 | au_play("n-thou"); |
148 | nz = 1; |
149 | } |
150 | } |
151 | if (n > 2) { |
152 | if (*p == '0') { |
153 | p++; |
154 | } else { |
155 | digit(*p++); |
156 | au_play("n-hun"); |
157 | nz = 1; |
158 | } |
159 | n--; |
160 | } |
161 | return (lasttwo(p, n, nz ? f_and : 0) || nz); |
162 | } |
163 | |
164 | /* --- @aunum@ --- * |
165 | * |
166 | * Arguments: @const char *p@ = pointer to number's textual representation |
167 | * |
168 | * Returns: --- |
169 | * |
170 | * Use: Reads the given number aloud. |
171 | */ |
172 | |
173 | void aunum(const char *p) |
174 | { |
175 | size_t pl; |
176 | int nz; |
177 | |
178 | /* --- Pick off a leading sign --- */ |
179 | |
180 | again: |
181 | if (*p == '+') |
182 | p++; |
183 | else if (*p == '-') { |
184 | au_play("n-minus"); |
185 | p++; |
186 | } |
187 | |
188 | /* --- Work out how many digits we have --- */ |
189 | |
190 | p += strspn(p, "0"); |
191 | pl = strspn(p, "0123456789"); |
192 | nz = bignum(p, pl); |
193 | p += pl; |
194 | |
195 | /* --- If the value was zero, and there's no `point', say `zero' --- */ |
196 | |
197 | if (*p != '.' && !nz) |
198 | au_play("n-0"); |
199 | if (*p == '.') { |
200 | au_play("n-point"); |
201 | p++; |
202 | pl = strspn(p, "0123456789"); |
203 | digits(p, pl); |
204 | p += pl; |
205 | } |
206 | if (*p == 'e' || *p == 'E') { |
207 | au_play("n-exp"); |
208 | p++; |
209 | goto again; |
210 | } |
211 | |
212 | /* --- Run out of things to do --- */ |
213 | |
214 | return; |
215 | } |
216 | |
217 | /* --- @aunum_ulong@ --- * |
218 | * |
219 | * Arguments: @unsigned long n@ = number to be read |
220 | * |
221 | * Returns: --- |
222 | * |
223 | * Use: Reads a number expressed as an @unsigned long@. |
224 | */ |
225 | |
226 | void aunum_ulong(unsigned long n) |
227 | { |
228 | dstr d = DSTR_INIT; |
229 | |
230 | dstr_putf(&d, "%lu", n); |
231 | aunum(d.buf); |
232 | dstr_destroy(&d); |
233 | } |
234 | |
235 | /*----- That's all, folks -------------------------------------------------*/ |