1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
|
/* Provide a version _doprnt in terms of fprintf.
Copyright (C) 1998 Free Software Foundation, Inc.
Contributed by Kaveh Ghazi (ghazi@caip.rutgers.edu) 3/29/98
This program 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, or (at your option) any
later version.
This program 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 this program; if not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
*/
#include "config.h"
#include "system.h"
#undef _doprnt
#ifdef TEST /* Make sure to use the internal one. */
#define _doprnt my_doprnt
#endif
#define COPY_VA_INT \
do { \
const int value = abs (va_arg (ap, int)); \
char buf[32]; \
ptr++; /* Go past the asterisk. */ \
*sptr = '\0'; /* NULL terminate sptr. */ \
sprintf(buf, "%d", value); \
strcat(sptr, buf); \
while (*sptr) sptr++; \
} while (0)
#define PRINT_CHAR(CHAR) \
do { \
putc(CHAR, stream); \
ptr++; \
total_printed++; \
continue; \
} while (0)
#define PRINT_TYPE(TYPE) \
do { \
int result; \
TYPE value = va_arg (ap, TYPE); \
*sptr++ = *ptr++; /* Copy the type specifier. */ \
*sptr = '\0'; /* NULL terminate sptr. */ \
result = fprintf(stream, specifier, value); \
if (result == -1) \
return -1; \
else \
{ \
total_printed += result; \
continue; \
} \
} while (0)
int
_doprnt (format, ap, stream)
const char * format;
va_list ap;
FILE * stream;
{
const char * ptr = format;
char specifier[128];
int total_printed = 0;
while (*ptr != '\0')
{
if (*ptr != '%') /* While we have regular characters, print them. */
PRINT_CHAR(*ptr);
else /* We got a format specifier! */
{
char * sptr = specifier;
int wide_width = 0, short_width = 0;
*sptr++ = *ptr++; /* Copy the % and move forward. */
while (strchr ("-+ #0", *ptr)) /* Move past flags. */
*sptr++ = *ptr++;
if (*ptr == '*')
COPY_VA_INT;
else
while (ISDIGIT(*ptr)) /* Handle explicit numeric value. */
*sptr++ = *ptr++;
if (*ptr == '.')
{
*sptr++ = *ptr++; /* Copy and go past the period. */
if (*ptr == '*')
COPY_VA_INT;
else
while (ISDIGIT(*ptr)) /* Handle explicit numeric value. */
*sptr++ = *ptr++;
}
while (strchr ("hlL", *ptr))
{
switch (*ptr)
{
case 'h':
short_width = 1;
break;
case 'l':
wide_width++;
break;
case 'L':
wide_width = 2;
break;
default:
abort();
}
*sptr++ = *ptr++;
}
switch (*ptr)
{
case 'd':
case 'i':
case 'o':
case 'u':
case 'x':
case 'X':
case 'c':
{
/* Short values are promoted to int, so just copy it
as an int and trust the C library printf to cast it
to the right width. */
if (short_width)
PRINT_TYPE(int);
else
{
switch (wide_width)
{
case 0:
PRINT_TYPE(int);
break;
case 1:
PRINT_TYPE(long);
break;
case 2:
default:
#if defined(__GNUC__) || defined(HAVE_LONG_LONG)
PRINT_TYPE(long long);
#else
PRINT_TYPE(long); /* Fake it and hope for the best. */
#endif
break;
} /* End of switch (wide_width) */
} /* End of else statement */
} /* End of integer case */
break;
case 'f':
case 'e':
case 'E':
case 'g':
case 'G':
{
if (wide_width == 0)
PRINT_TYPE(double);
else
{
#if defined(__GNUC__) || defined(HAVE_LONG_DOUBLE)
PRINT_TYPE(long double);
#else
PRINT_TYPE(double); /* Fake it and hope for the best. */
#endif
}
}
break;
case 's':
PRINT_TYPE(char *);
break;
case 'p':
PRINT_TYPE(void *);
break;
case '%':
PRINT_CHAR('%');
break;
default:
abort();
} /* End of switch (*ptr) */
} /* End of else statement */
}
return total_printed;
}
#ifdef TEST
#include <math.h>
#ifndef M_PI
#define M_PI (3.1415926535897932385)
#endif
#define RESULT(x) do \
{ \
int i = (x); \
printf ("printed %d characters\n", i); \
fflush(stdin); \
} while (0)
static int checkit PVPROTO ((const char * format, ...)) ATTRIBUTE_PRINTF_1;
static int
checkit VPROTO ((const char* format, ...))
{
va_list args;
int result;
#ifndef ANSI_PROTOTYPES
char *format;
#endif
VA_START (args, format);
#ifndef ANSI_PROTOTYPES
format = va_arg (args, char *);
#endif
result = _doprnt (format, args, stdout);
va_end(args);
return result;
}
int
main ()
{
RESULT(checkit ("<%d>\n", 0x12345678));
RESULT(printf ("<%d>\n", 0x12345678));
RESULT(checkit ("<%200d>\n", 5));
RESULT(printf ("<%200d>\n", 5));
RESULT(checkit ("<%.300d>\n", 6));
RESULT(printf ("<%.300d>\n", 6));
RESULT(checkit ("<%100.150d>\n", 7));
RESULT(printf ("<%100.150d>\n", 7));
RESULT(checkit ("<%s>\n",
"jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
777777777777777777333333333333366666666666622222222222777777777777733333"));
RESULT(printf ("<%s>\n",
"jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
777777777777777777333333333333366666666666622222222222777777777777733333"));
RESULT(checkit ("<%f><%0+#f>%s%d%s>\n",
1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
RESULT(printf ("<%f><%0+#f>%s%d%s>\n",
1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
RESULT(checkit ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
RESULT(printf ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
RESULT(checkit ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
RESULT(printf ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
75, 75, 75, 75, 75, 75, 75));
RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
75, 75, 75, 75, 75, 75, 75));
RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
75, 75, 75, 75, 75, 75, 75));
RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
75, 75, 75, 75, 75, 75, 75));
RESULT(checkit ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
RESULT(printf ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
#if defined(__GNUC__) || defined (HAVE_LONG_LONG)
RESULT(checkit ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
RESULT(printf ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
RESULT(checkit ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
RESULT(printf ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
#endif
#if defined(__GNUC__) || defined (HAVE_LONG_DOUBLE)
RESULT(checkit ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
1.23456, 1.234567890123456789L, 1.23456));
RESULT(printf ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
1.23456, 1.234567890123456789L, 1.23456));
#endif
return 0;
}
#endif /* TEST */
|
