1 /****************************************************************************
2 * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Thomas E. Dickey <dickey@clark.net> 1997 *
31 ****************************************************************************/
33 #include <curses.priv.h>
36 MODULE_ID("$Id: safe_sprintf.c,v 1.14 2001/07/08 00:58:34 tom Exp $")
41 Flags, Width, Prec, Type, Format
44 #define VA_INTGR(type) ival = va_arg(ap, type)
45 #define VA_FLOAT(type) fval = va_arg(ap, type)
46 #define VA_POINT(type) pval = (void *)va_arg(ap, type)
49 * Scan a variable-argument list for printf to determine the number of
50 * characters that would be emitted.
53 _nc_printf_length(const char *fmt, va_list ap)
55 size_t length = BUFSIZ;
60 if (fmt == 0 || *fmt == '\0')
62 if ((format = typeMalloc(char, strlen(fmt) + 1)) == 0)
64 if ((buffer = typeMalloc(char, length)) == 0) {
69 while (*fmt != '\0') {
71 static char dummy[] = "";
73 char *pval = dummy; /* avoid const-cast */
84 while (*++fmt != '\0' && len >= 0 && !done) {
87 if (isdigit(UChar(*fmt))) {
89 if (state == Flags && num != 0)
94 width = (width * 10) + num;
95 } else if (state == Prec) {
98 prec = (prec * 10) + num;
100 } else if (*fmt == '*') {
104 if (state == Width) {
106 } else if (state == Prec) {
109 sprintf(&format[--f], "%d", ival);
111 } else if (isalpha(UChar(*fmt))) {
114 case 'Z': /* FALLTHRU */
115 case 'h': /* FALLTHRU */
116 case 'l': /* FALLTHRU */
120 case 'i': /* FALLTHRU */
121 case 'd': /* FALLTHRU */
122 case 'u': /* FALLTHRU */
123 case 'x': /* FALLTHRU */
124 case 'X': /* FALLTHRU */
127 else if (type == 'Z')
133 case 'f': /* FALLTHRU */
134 case 'e': /* FALLTHRU */
135 case 'E': /* FALLTHRU */
136 case 'g': /* FALLTHRU */
137 case 'G': /* FALLTHRU */
149 if (prec > (int) length) {
150 length = length + prec;
151 buffer = typeRealloc(char, length, buffer);
170 } else if (*fmt == '.') {
172 } else if (*fmt == '%') {
180 sprintf(buffer, format, ival);
183 sprintf(buffer, format, fval);
186 sprintf(buffer, format, pval);
189 len += (int) strlen(buffer);
203 * Wrapper for vsprintf that allocates a buffer big enough to hold the result.
205 NCURSES_EXPORT(char *)
207 (const char *fmt, va_list ap)
211 int len = _nc_printf_length(fmt, ap);
214 if ((buf = typeMalloc(char, len + 1)) == 0)
216 vsprintf(buf, fmt, ap);
219 static int rows, cols;
223 if (screen_lines > rows || screen_columns > cols) {
224 if (screen_lines > rows)
226 if (screen_columns > cols)
227 cols = screen_columns;
228 len = (rows * (cols + 1)) + 1;
229 buf = typeRealloc(char, len, buf);
237 vsnprintf(buf, len, fmt, ap); /* GNU extension */
239 vsprintf(buf, fmt, ap); /* ANSI */