1 /* Provide a version of _doprnt in terms of fprintf.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by Kaveh Ghazi (ghazi@caip.rutgers.edu) 3/29/98
4
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option) any
8 later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18
19 #include "config.h"
20 #include "ansidecl.h"
21 #include "safe-ctype.h"
22
23 #include <stdio.h>
24 #ifdef ANSI_PROTOTYPES
25 #include <stdarg.h>
26 #else
27 #include <varargs.h>
28 #endif
29 #ifdef HAVE_STRING_H
30 #include <string.h>
31 #endif
32 #ifdef HAVE_STDLIB_H
33 #include <stdlib.h>
34 #endif
35
36 #undef _doprnt
37
38 #ifdef HAVE__DOPRNT
39 #define TEST
40 #endif
41
42 #ifdef TEST /* Make sure to use the internal one. */
43 #define _doprnt my_doprnt
44 #endif
45
46 #define COPY_VA_INT \
47 do { \
48 const int value = abs (va_arg (ap, int)); \
49 char buf[32]; \
50 ptr++; /* Go past the asterisk. */ \
51 *sptr = '\0'; /* NULL terminate sptr. */ \
52 sprintf(buf, "%d", value); \
53 strcat(sptr, buf); \
54 while (*sptr) sptr++; \
55 } while (0)
56
57 #define PRINT_CHAR(CHAR) \
58 do { \
59 putc(CHAR, stream); \
60 ptr++; \
61 total_printed++; \
62 continue; \
63 } while (0)
64
65 #define PRINT_TYPE(TYPE) \
66 do { \
67 int result; \
68 TYPE value = va_arg (ap, TYPE); \
69 *sptr++ = *ptr++; /* Copy the type specifier. */ \
70 *sptr = '\0'; /* NULL terminate sptr. */ \
71 result = fprintf(stream, specifier, value); \
72 if (result == -1) \
73 return -1; \
74 else \
75 { \
76 total_printed += result; \
77 continue; \
78 } \
79 } while (0)
80
81 int
_doprnt(format,ap,stream)82 _doprnt (format, ap, stream)
83 const char * format;
84 va_list ap;
85 FILE * stream;
86 {
87 const char * ptr = format;
88 char specifier[128];
89 int total_printed = 0;
90
91 while (*ptr != '\0')
92 {
93 if (*ptr != '%') /* While we have regular characters, print them. */
94 PRINT_CHAR(*ptr);
95 else /* We got a format specifier! */
96 {
97 char * sptr = specifier;
98 int wide_width = 0, short_width = 0;
99
100 *sptr++ = *ptr++; /* Copy the % and move forward. */
101
102 while (strchr ("-+ #0", *ptr)) /* Move past flags. */
103 *sptr++ = *ptr++;
104
105 if (*ptr == '*')
106 COPY_VA_INT;
107 else
108 while (ISDIGIT(*ptr)) /* Handle explicit numeric value. */
109 *sptr++ = *ptr++;
110
111 if (*ptr == '.')
112 {
113 *sptr++ = *ptr++; /* Copy and go past the period. */
114 if (*ptr == '*')
115 COPY_VA_INT;
116 else
117 while (ISDIGIT(*ptr)) /* Handle explicit numeric value. */
118 *sptr++ = *ptr++;
119 }
120 while (strchr ("hlL", *ptr))
121 {
122 switch (*ptr)
123 {
124 case 'h':
125 short_width = 1;
126 break;
127 case 'l':
128 wide_width++;
129 break;
130 case 'L':
131 wide_width = 2;
132 break;
133 default:
134 abort();
135 }
136 *sptr++ = *ptr++;
137 }
138
139 switch (*ptr)
140 {
141 case 'd':
142 case 'i':
143 case 'o':
144 case 'u':
145 case 'x':
146 case 'X':
147 case 'c':
148 {
149 /* Short values are promoted to int, so just copy it
150 as an int and trust the C library printf to cast it
151 to the right width. */
152 if (short_width)
153 PRINT_TYPE(int);
154 else
155 {
156 switch (wide_width)
157 {
158 case 0:
159 PRINT_TYPE(int);
160 break;
161 case 1:
162 PRINT_TYPE(long);
163 break;
164 case 2:
165 default:
166 #if defined(__GNUC__) || defined(HAVE_LONG_LONG)
167 PRINT_TYPE(long long);
168 #else
169 PRINT_TYPE(long); /* Fake it and hope for the best. */
170 #endif
171 break;
172 } /* End of switch (wide_width) */
173 } /* End of else statement */
174 } /* End of integer case */
175 break;
176 case 'f':
177 case 'e':
178 case 'E':
179 case 'g':
180 case 'G':
181 {
182 if (wide_width == 0)
183 PRINT_TYPE(double);
184 else
185 {
186 #if defined(__GNUC__) || defined(HAVE_LONG_DOUBLE)
187 PRINT_TYPE(long double);
188 #else
189 PRINT_TYPE(double); /* Fake it and hope for the best. */
190 #endif
191 }
192 }
193 break;
194 case 's':
195 PRINT_TYPE(char *);
196 break;
197 case 'p':
198 PRINT_TYPE(void *);
199 break;
200 case '%':
201 PRINT_CHAR('%');
202 break;
203 default:
204 abort();
205 } /* End of switch (*ptr) */
206 } /* End of else statement */
207 }
208
209 return total_printed;
210 }
211
212 #ifdef TEST
213
214 #include <math.h>
215 #ifndef M_PI
216 #define M_PI (3.1415926535897932385)
217 #endif
218
219 #define RESULT(x) do \
220 { \
221 int i = (x); \
222 printf ("printed %d characters\n", i); \
223 fflush(stdin); \
224 } while (0)
225
226 static int checkit PARAMS ((const char * format, ...)) ATTRIBUTE_PRINTF_1;
227
228 static int
checkit(const char * format,...)229 checkit VPARAMS ((const char* format, ...))
230 {
231 int result;
232 VA_OPEN (args, format);
233 VA_FIXEDARG (args, char *, format);
234
235 result = _doprnt (format, args, stdout);
236 VA_CLOSE (args);
237
238 return result;
239 }
240
241 int
main()242 main ()
243 {
244 RESULT(checkit ("<%d>\n", 0x12345678));
245 RESULT(printf ("<%d>\n", 0x12345678));
246
247 RESULT(checkit ("<%200d>\n", 5));
248 RESULT(printf ("<%200d>\n", 5));
249
250 RESULT(checkit ("<%.300d>\n", 6));
251 RESULT(printf ("<%.300d>\n", 6));
252
253 RESULT(checkit ("<%100.150d>\n", 7));
254 RESULT(printf ("<%100.150d>\n", 7));
255
256 RESULT(checkit ("<%s>\n",
257 "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
258 777777777777777777333333333333366666666666622222222222777777777777733333"));
259 RESULT(printf ("<%s>\n",
260 "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
261 777777777777777777333333333333366666666666622222222222777777777777733333"));
262
263 RESULT(checkit ("<%f><%0+#f>%s%d%s>\n",
264 1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
265 RESULT(printf ("<%f><%0+#f>%s%d%s>\n",
266 1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
267
268 RESULT(checkit ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
269 RESULT(printf ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
270
271 RESULT(checkit ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
272 RESULT(printf ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
273
274 RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
275 75, 75, 75, 75, 75, 75, 75));
276 RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
277 75, 75, 75, 75, 75, 75, 75));
278
279 RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
280 75, 75, 75, 75, 75, 75, 75));
281 RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
282 75, 75, 75, 75, 75, 75, 75));
283
284 RESULT(checkit ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
285 RESULT(printf ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
286
287 #if defined(__GNUC__) || defined (HAVE_LONG_LONG)
288 RESULT(checkit ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
289 RESULT(printf ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
290 RESULT(checkit ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
291 RESULT(printf ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
292 #endif
293
294 #if defined(__GNUC__) || defined (HAVE_LONG_DOUBLE)
295 RESULT(checkit ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
296 1.23456, 1.234567890123456789L, 1.23456));
297 RESULT(printf ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
298 1.23456, 1.234567890123456789L, 1.23456));
299 #endif
300
301 return 0;
302 }
303 #endif /* TEST */
304