| 2 |
- |
1 |
/*
|
|
|
2 |
* pANS stdio -- vfprintf
|
|
|
3 |
*/
|
|
|
4 |
#include "iolib.h"
|
|
|
5 |
/*
|
|
|
6 |
* Leading flags
|
|
|
7 |
*/
|
|
|
8 |
#define SPACE 1 /* ' ' prepend space if no sign printed */
|
|
|
9 |
#define ALT 2 /* '#' use alternate conversion */
|
|
|
10 |
#define SIGN 4 /* '+' prepend sign, even if positive */
|
|
|
11 |
#define LEFT 8 /* '-' left-justify */
|
|
|
12 |
#define ZPAD 16 /* '0' zero-pad */
|
|
|
13 |
/*
|
|
|
14 |
* Trailing flags
|
|
|
15 |
*/
|
|
|
16 |
#define SHORT 32 /* 'h' convert a short integer */
|
|
|
17 |
#define LONG 64 /* 'l' convert a long integer */
|
|
|
18 |
#define LDBL 128 /* 'L' convert a long double */
|
|
|
19 |
#define PTR 256 /* convert a void * (%p) */
|
|
|
20 |
|
|
|
21 |
static int lflag[] = { /* leading flags */
|
|
|
22 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^@ ^A ^B ^C ^D ^E ^F ^G */
|
|
|
23 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^H ^I ^J ^K ^L ^M ^N ^O */
|
|
|
24 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^P ^Q ^R ^S ^T ^U ^V ^W */
|
|
|
25 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^X ^Y ^Z ^[ ^\ ^] ^^ ^_ */
|
|
|
26 |
SPACE, 0, 0, ALT, 0, 0, 0, 0, /* sp ! " # $ % & ' */
|
|
|
27 |
0, 0, 0, SIGN, 0, LEFT, 0, 0, /* ( ) * + , - . / */
|
|
|
28 |
ZPAD, 0, 0, 0, 0, 0, 0, 0, /* 0 1 2 3 4 5 6 7 */
|
|
|
29 |
0, 0, 0, 0, 0, 0, 0, 0, /* 8 9 : ; < = > ? */
|
|
|
30 |
0, 0, 0, 0, 0, 0, 0, 0, /* @ A B C D E F G */
|
|
|
31 |
0, 0, 0, 0, 0, 0, 0, 0, /* H I J K L M N O */
|
|
|
32 |
0, 0, 0, 0, 0, 0, 0, 0, /* P Q R S T U V W */
|
|
|
33 |
0, 0, 0, 0, 0, 0, 0, 0, /* X Y Z [ \ ] ^ _ */
|
|
|
34 |
0, 0, 0, 0, 0, 0, 0, 0, /* ` a b c d e f g */
|
|
|
35 |
0, 0, 0, 0, 0, 0, 0, 0, /* h i j k l m n o */
|
|
|
36 |
0, 0, 0, 0, 0, 0, 0, 0, /* p q r s t u v w */
|
|
|
37 |
0, 0, 0, 0, 0, 0, 0, 0, /* x y z { | } ~ ^? */
|
|
|
38 |
|
|
|
39 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
40 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
41 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
42 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
43 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
44 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
45 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
46 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
47 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
48 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
49 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
50 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
51 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
52 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
53 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
54 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
55 |
};
|
|
|
56 |
|
|
|
57 |
static int tflag[] = { /* trailing flags */
|
|
|
58 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^@ ^A ^B ^C ^D ^E ^F ^G */
|
|
|
59 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^H ^I ^J ^K ^L ^M ^N ^O */
|
|
|
60 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^P ^Q ^R ^S ^T ^U ^V ^W */
|
|
|
61 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^X ^Y ^Z ^[ ^\ ^] ^^ ^_ */
|
|
|
62 |
0, 0, 0, 0, 0, 0, 0, 0, /* sp ! " # $ % & ' */
|
|
|
63 |
0, 0, 0, 0, 0, 0, 0, 0, /* ( ) * + , - . / */
|
|
|
64 |
0, 0, 0, 0, 0, 0, 0, 0, /* 0 1 2 3 4 5 6 7 */
|
|
|
65 |
0, 0, 0, 0, 0, 0, 0, 0, /* 8 9 : ; < = > ? */
|
|
|
66 |
0, 0, 0, 0, 0, 0, 0, 0, /* @ A B C D E F G */
|
|
|
67 |
0, 0, 0, 0, LDBL, 0, 0, 0, /* H I J K L M N O */
|
|
|
68 |
0, 0, 0, 0, 0, 0, 0, 0, /* P Q R S T U V W */
|
|
|
69 |
0, 0, 0, 0, 0, 0, 0, 0, /* X Y Z [ \ ] ^ _ */
|
|
|
70 |
0, 0, 0, 0, 0, 0, 0, 0, /* ` a b c d e f g */
|
|
|
71 |
SHORT, 0, 0, 0, LONG, 0, 0, 0, /* h i j k l m n o */
|
|
|
72 |
0, 0, 0, 0, 0, 0, 0, 0, /* p q r s t u v w */
|
|
|
73 |
0, 0, 0, 0, 0, 0, 0, 0, /* x y z { | } ~ ^? */
|
|
|
74 |
|
|
|
75 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
76 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
77 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
78 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
79 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
80 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
81 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
82 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
83 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
84 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
85 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
86 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
87 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
88 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
89 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
90 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
91 |
};
|
|
|
92 |
|
|
|
93 |
static int ocvt_E(FILE *, va_list *, int, int, int);
|
|
|
94 |
static int ocvt_G(FILE *, va_list *, int, int, int);
|
|
|
95 |
static int ocvt_X(FILE *, va_list *, int, int, int);
|
|
|
96 |
static int ocvt_c(FILE *, va_list *, int, int, int);
|
|
|
97 |
static int ocvt_d(FILE *, va_list *, int, int, int);
|
|
|
98 |
static int ocvt_e(FILE *, va_list *, int, int, int);
|
|
|
99 |
static int ocvt_f(FILE *, va_list *, int, int, int);
|
|
|
100 |
static int ocvt_g(FILE *, va_list *, int, int, int);
|
|
|
101 |
static int ocvt_n(FILE *, va_list *, int, int, int);
|
|
|
102 |
static int ocvt_o(FILE *, va_list *, int, int, int);
|
|
|
103 |
static int ocvt_p(FILE *, va_list *, int, int, int);
|
|
|
104 |
static int ocvt_s(FILE *, va_list *, int, int, int);
|
|
|
105 |
static int ocvt_u(FILE *, va_list *, int, int, int);
|
|
|
106 |
static int ocvt_x(FILE *, va_list *, int, int, int);
|
|
|
107 |
|
|
|
108 |
static int(*ocvt[])(FILE *, va_list *, int, int, int) = {
|
|
|
109 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^@ ^A ^B ^C ^D ^E ^F ^G */
|
|
|
110 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^H ^I ^J ^K ^L ^M ^N ^O */
|
|
|
111 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^P ^Q ^R ^S ^T ^U ^V ^W */
|
|
|
112 |
0, 0, 0, 0, 0, 0, 0, 0, /* ^X ^Y ^Z ^[ ^\ ^] ^^ ^_ */
|
|
|
113 |
0, 0, 0, 0, 0, 0, 0, 0, /* sp ! " # $ % & ' */
|
|
|
114 |
0, 0, 0, 0, 0, 0, 0, 0, /* ( ) * + , - . / */
|
|
|
115 |
0, 0, 0, 0, 0, 0, 0, 0, /* 0 1 2 3 4 5 6 7 */
|
|
|
116 |
0, 0, 0, 0, 0, 0, 0, 0, /* 8 9 : ; < = > ? */
|
|
|
117 |
0, 0, 0, 0, 0, ocvt_E, 0, ocvt_G, /* @ A B C D E F G */
|
|
|
118 |
0, 0, 0, 0, 0, 0, 0, 0, /* H I J K L M N O */
|
|
|
119 |
0, 0, 0, 0, 0, 0, 0, 0, /* P Q R S T U V W */
|
|
|
120 |
ocvt_X, 0, 0, 0, 0, 0, 0, 0, /* X Y Z [ \ ] ^ _ */
|
|
|
121 |
0, 0, 0, ocvt_c, ocvt_d, ocvt_e, ocvt_f, ocvt_g, /* ` a b c d e f g */
|
|
|
122 |
0, ocvt_d, 0, 0, 0, 0, ocvt_n, ocvt_o, /* h i j k l m n o */
|
|
|
123 |
ocvt_p, 0, 0, ocvt_s, 0, ocvt_u, 0, 0, /* p q r s t u v w */
|
|
|
124 |
ocvt_x, 0, 0, 0, 0, 0, 0, 0, /* x y z { | } ~ ^? */
|
|
|
125 |
|
|
|
126 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
127 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
128 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
129 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
130 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
131 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
132 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
133 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
134 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
135 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
136 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
137 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
138 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
139 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
140 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
141 |
0, 0, 0, 0, 0, 0, 0, 0,
|
|
|
142 |
};
|
|
|
143 |
|
|
|
144 |
static int nprint;
|
|
|
145 |
|
|
|
146 |
QLock _stdiolk;
|
|
|
147 |
|
|
|
148 |
int
|
|
|
149 |
vfprintf(FILE *f, const char *s, va_list args)
|
|
|
150 |
{
|
|
|
151 |
int flags, width, precision;
|
|
|
152 |
|
|
|
153 |
qlock(&_stdiolk);
|
|
|
154 |
|
|
|
155 |
nprint = 0;
|
|
|
156 |
while(*s){
|
|
|
157 |
if(*s != '%'){
|
|
|
158 |
putc(*s++, f);
|
|
|
159 |
nprint++;
|
|
|
160 |
continue;
|
|
|
161 |
}
|
|
|
162 |
s++;
|
|
|
163 |
flags = 0;
|
|
|
164 |
while(lflag[*s&_IO_CHMASK]) flags |= lflag[*s++&_IO_CHMASK];
|
|
|
165 |
if(*s == '*'){
|
|
|
166 |
width = va_arg(args, int);
|
|
|
167 |
s++;
|
|
|
168 |
if(width<0){
|
|
|
169 |
flags |= LEFT;
|
|
|
170 |
width = -width;
|
|
|
171 |
}
|
|
|
172 |
}
|
|
|
173 |
else{
|
|
|
174 |
width = 0;
|
|
|
175 |
while('0'<=*s && *s<='9') width = width*10 + *s++ - '0';
|
|
|
176 |
}
|
|
|
177 |
if(*s == '.'){
|
|
|
178 |
s++;
|
|
|
179 |
if(*s == '*'){
|
|
|
180 |
precision = va_arg(args, int);
|
|
|
181 |
s++;
|
|
|
182 |
}
|
|
|
183 |
else{
|
|
|
184 |
precision = 0;
|
|
|
185 |
while('0'<=*s && *s<='9') precision = precision*10 + *s++ - '0';
|
|
|
186 |
}
|
|
|
187 |
}
|
|
|
188 |
else
|
|
|
189 |
precision = -1;
|
|
|
190 |
while(tflag[*s&_IO_CHMASK]) flags |= tflag[*s++&_IO_CHMASK];
|
|
|
191 |
if(ocvt[*s]) nprint += (*ocvt[*s++])(f, &args, flags, width, precision);
|
|
|
192 |
else if(*s){
|
|
|
193 |
putc(*s++, f);
|
|
|
194 |
nprint++;
|
|
|
195 |
}
|
|
|
196 |
}
|
|
|
197 |
|
|
|
198 |
qunlock(&_stdiolk);
|
|
|
199 |
|
|
|
200 |
if(ferror(f)){
|
|
|
201 |
if((f->flags&STRING) && f->wp==f->rp && f->wp>f->buf){
|
|
|
202 |
*(f->wp-1) = '\0';
|
|
|
203 |
return nprint;
|
|
|
204 |
}
|
|
|
205 |
return -1;
|
|
|
206 |
}
|
|
|
207 |
return nprint;
|
|
|
208 |
}
|
|
|
209 |
|
|
|
210 |
static int
|
|
|
211 |
ocvt_c(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
212 |
{
|
|
|
213 |
#pragma ref precision
|
|
|
214 |
int i;
|
|
|
215 |
|
|
|
216 |
if(!(flags&LEFT)) for(i=1; i<width; i++) putc(' ', f);
|
|
|
217 |
putc((unsigned char)va_arg(*args, int), f);
|
|
|
218 |
if(flags&LEFT) for(i=1; i<width; i++) putc(' ', f);
|
|
|
219 |
return width<1 ? 1 : width;
|
|
|
220 |
}
|
|
|
221 |
|
|
|
222 |
static int
|
|
|
223 |
ocvt_s(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
224 |
{
|
|
|
225 |
int i, n = 0;
|
|
|
226 |
char *s;
|
|
|
227 |
|
|
|
228 |
s = va_arg(*args, char *);
|
|
|
229 |
if(!(flags&LEFT)){
|
|
|
230 |
if(precision >= 0)
|
|
|
231 |
for(i=0; i!=precision && s[i]; i++);
|
|
|
232 |
else
|
|
|
233 |
for(i=0; s[i]; i++);
|
|
|
234 |
for(; i<width; i++){
|
|
|
235 |
putc(' ', f);
|
|
|
236 |
n++;
|
|
|
237 |
}
|
|
|
238 |
}
|
|
|
239 |
if(precision >= 0){
|
|
|
240 |
for(i=0; i!=precision && *s; i++){
|
|
|
241 |
putc(*s++, f);
|
|
|
242 |
n++;
|
|
|
243 |
}
|
|
|
244 |
} else{
|
|
|
245 |
for(i=0;*s;i++){
|
|
|
246 |
putc(*s++, f);
|
|
|
247 |
n++;
|
|
|
248 |
}
|
|
|
249 |
}
|
|
|
250 |
if(flags&LEFT){
|
|
|
251 |
for(; i<width; i++){
|
|
|
252 |
putc(' ', f);
|
|
|
253 |
n++;
|
|
|
254 |
}
|
|
|
255 |
}
|
|
|
256 |
return n;
|
|
|
257 |
}
|
|
|
258 |
|
|
|
259 |
static int
|
|
|
260 |
ocvt_n(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
261 |
{
|
|
|
262 |
#pragma ref f
|
|
|
263 |
#pragma ref width
|
|
|
264 |
#pragma ref precision
|
|
|
265 |
if(flags&SHORT)
|
|
|
266 |
*va_arg(*args, short *) = nprint;
|
|
|
267 |
else if(flags&LONG)
|
|
|
268 |
*va_arg(*args, long *) = nprint;
|
|
|
269 |
else
|
|
|
270 |
*va_arg(*args, int *) = nprint;
|
|
|
271 |
return 0;
|
|
|
272 |
}
|
|
|
273 |
|
|
|
274 |
/*
|
|
|
275 |
* Generic fixed-point conversion
|
|
|
276 |
* f is the output FILE *;
|
|
|
277 |
* args is the va_list * from which to get the number;
|
|
|
278 |
* flags, width and precision are the results of printf-cracking;
|
|
|
279 |
* radix is the number base to print in;
|
|
|
280 |
* alphabet is the set of digits to use;
|
|
|
281 |
* prefix is the prefix to print before non-zero numbers when
|
|
|
282 |
* using ``alternate form.''
|
|
|
283 |
*/
|
|
|
284 |
static int
|
|
|
285 |
ocvt_fixed(FILE *f, va_list *args, int flags, int width, int precision,
|
|
|
286 |
int radix, int sgned, char alphabet[], char *prefix)
|
|
|
287 |
{
|
|
|
288 |
char digits[128]; /* no reasonable machine will ever overflow this */
|
|
|
289 |
char *sign;
|
|
|
290 |
char *dp;
|
|
|
291 |
long snum;
|
|
|
292 |
unsigned long num;
|
|
|
293 |
int nout, npad, nlzero;
|
|
|
294 |
|
|
|
295 |
if(sgned){
|
|
|
296 |
if(flags&PTR) snum = (long)va_arg(*args, void *);
|
|
|
297 |
else if(flags&SHORT) snum = va_arg(*args, short);
|
|
|
298 |
else if(flags&LONG) snum = va_arg(*args, long);
|
|
|
299 |
else snum = va_arg(*args, int);
|
|
|
300 |
if(snum < 0){
|
|
|
301 |
sign = "-";
|
|
|
302 |
num = -snum;
|
|
|
303 |
} else{
|
|
|
304 |
if(flags&SIGN) sign = "+";
|
|
|
305 |
else if(flags&SPACE) sign = " ";
|
|
|
306 |
else sign = "";
|
|
|
307 |
num = snum;
|
|
|
308 |
}
|
|
|
309 |
} else {
|
|
|
310 |
sign = "";
|
|
|
311 |
if(flags&PTR) num = (long)va_arg(*args, void *);
|
|
|
312 |
else if(flags&SHORT) num = va_arg(*args, unsigned short);
|
|
|
313 |
else if(flags&LONG) num = va_arg(*args, unsigned long);
|
|
|
314 |
else num = va_arg(*args, unsigned int);
|
|
|
315 |
}
|
|
|
316 |
if(num == 0) prefix = "";
|
|
|
317 |
dp = digits;
|
|
|
318 |
do{
|
|
|
319 |
*dp++ = alphabet[num%radix];
|
|
|
320 |
num /= radix;
|
|
|
321 |
}while(num);
|
|
|
322 |
if(precision==0 && dp-digits==1 && dp[-1]=='0')
|
|
|
323 |
dp--;
|
|
|
324 |
nlzero = precision-(dp-digits);
|
|
|
325 |
if(nlzero < 0) nlzero = 0;
|
|
|
326 |
if(flags&ALT){
|
|
|
327 |
if(radix == 8) if(dp[-1]=='0' || nlzero) prefix = "";
|
|
|
328 |
}
|
|
|
329 |
else prefix = "";
|
|
|
330 |
nout = dp-digits+nlzero+strlen(prefix)+strlen(sign);
|
|
|
331 |
npad = width-nout;
|
|
|
332 |
if(npad < 0) npad = 0;
|
|
|
333 |
nout += npad;
|
|
|
334 |
if(!(flags&LEFT)){
|
|
|
335 |
if(flags&ZPAD && precision <= 0){
|
|
|
336 |
fputs(sign, f);
|
|
|
337 |
fputs(prefix, f);
|
|
|
338 |
while(npad){
|
|
|
339 |
putc('0', f);
|
|
|
340 |
--npad;
|
|
|
341 |
}
|
|
|
342 |
} else{
|
|
|
343 |
while(npad){
|
|
|
344 |
putc(' ', f);
|
|
|
345 |
--npad;
|
|
|
346 |
}
|
|
|
347 |
fputs(sign, f);
|
|
|
348 |
fputs(prefix, f);
|
|
|
349 |
}
|
|
|
350 |
while(nlzero){
|
|
|
351 |
putc('0', f);
|
|
|
352 |
--nlzero;
|
|
|
353 |
}
|
|
|
354 |
while(dp!=digits) putc(*--dp, f);
|
|
|
355 |
}
|
|
|
356 |
else{
|
|
|
357 |
fputs(sign, f);
|
|
|
358 |
fputs(prefix, f);
|
|
|
359 |
while(nlzero){
|
|
|
360 |
putc('0', f);
|
|
|
361 |
--nlzero;
|
|
|
362 |
}
|
|
|
363 |
while(dp != digits) putc(*--dp, f);
|
|
|
364 |
while(npad){
|
|
|
365 |
putc(' ', f);
|
|
|
366 |
--npad;
|
|
|
367 |
}
|
|
|
368 |
}
|
|
|
369 |
return nout;
|
|
|
370 |
}
|
|
|
371 |
|
|
|
372 |
static int
|
|
|
373 |
ocvt_X(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
374 |
{
|
|
|
375 |
return ocvt_fixed(f, args, flags, width, precision, 16, 0, "0123456789ABCDEF", "0X");
|
|
|
376 |
}
|
|
|
377 |
|
|
|
378 |
static int
|
|
|
379 |
ocvt_d(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
380 |
{
|
|
|
381 |
return ocvt_fixed(f, args, flags, width, precision, 10, 1, "0123456789", "");
|
|
|
382 |
}
|
|
|
383 |
|
|
|
384 |
static int
|
|
|
385 |
ocvt_o(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
386 |
{
|
|
|
387 |
return ocvt_fixed(f, args, flags, width, precision, 8, 0, "01234567", "0");
|
|
|
388 |
}
|
|
|
389 |
|
|
|
390 |
static int
|
|
|
391 |
ocvt_p(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
392 |
{
|
|
|
393 |
return ocvt_fixed(f, args, flags|PTR|ALT, width, precision, 16, 0,
|
|
|
394 |
"0123456789ABCDEF", "0X");
|
|
|
395 |
}
|
|
|
396 |
|
|
|
397 |
static int
|
|
|
398 |
ocvt_u(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
399 |
{
|
|
|
400 |
return ocvt_fixed(f, args, flags, width, precision, 10, 0, "0123456789", "");
|
|
|
401 |
}
|
|
|
402 |
|
|
|
403 |
static int
|
|
|
404 |
ocvt_x(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
405 |
{
|
|
|
406 |
return ocvt_fixed(f, args, flags, width, precision, 16, 0, "0123456789abcdef", "0x");
|
|
|
407 |
}
|
|
|
408 |
|
|
|
409 |
static int ocvt_flt(FILE *, va_list *, int, int, int, char);
|
|
|
410 |
|
|
|
411 |
static int
|
|
|
412 |
ocvt_E(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
413 |
{
|
|
|
414 |
return ocvt_flt(f, args, flags, width, precision, 'E');
|
|
|
415 |
}
|
|
|
416 |
|
|
|
417 |
static int
|
|
|
418 |
ocvt_G(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
419 |
{
|
|
|
420 |
return ocvt_flt(f, args, flags, width, precision, 'G');
|
|
|
421 |
}
|
|
|
422 |
|
|
|
423 |
static int
|
|
|
424 |
ocvt_e(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
425 |
{
|
|
|
426 |
return ocvt_flt(f, args, flags, width, precision, 'e');
|
|
|
427 |
}
|
|
|
428 |
|
|
|
429 |
static int
|
|
|
430 |
ocvt_f(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
431 |
{
|
|
|
432 |
return ocvt_flt(f, args, flags, width, precision, 'f');
|
|
|
433 |
}
|
|
|
434 |
|
|
|
435 |
static int
|
|
|
436 |
ocvt_g(FILE *f, va_list *args, int flags, int width, int precision)
|
|
|
437 |
{
|
|
|
438 |
return ocvt_flt(f, args, flags, width, precision, 'g');
|
|
|
439 |
}
|
|
|
440 |
|
|
|
441 |
static int
|
|
|
442 |
ocvt_flt(FILE *f, va_list *args, int flags, int width, int precision, char afmt)
|
|
|
443 |
{
|
|
|
444 |
int echr;
|
|
|
445 |
char *digits, *edigits;
|
|
|
446 |
int exponent;
|
|
|
447 |
char fmt;
|
|
|
448 |
int sign;
|
|
|
449 |
int ndig;
|
|
|
450 |
int nout, i;
|
|
|
451 |
char ebuf[20]; /* no sensible machine will overflow this */
|
|
|
452 |
char *eptr;
|
|
|
453 |
double d;
|
|
|
454 |
|
|
|
455 |
echr = 'e';
|
|
|
456 |
fmt = afmt;
|
|
|
457 |
d = va_arg(*args, double);
|
|
|
458 |
if(precision < 0) precision = 6;
|
|
|
459 |
switch(fmt){
|
|
|
460 |
case 'f':
|
|
|
461 |
digits = dtoa(d, 3, precision, &exponent, &sign, &edigits);
|
|
|
462 |
break;
|
|
|
463 |
case 'E':
|
|
|
464 |
echr = 'E';
|
|
|
465 |
fmt = 'e';
|
|
|
466 |
/* fall through */
|
|
|
467 |
case 'e':
|
|
|
468 |
digits = dtoa(d, 2, 1+precision, &exponent, &sign, &edigits);
|
|
|
469 |
break;
|
|
|
470 |
case 'G':
|
|
|
471 |
echr = 'E';
|
|
|
472 |
/* fall through */
|
|
|
473 |
case 'g':
|
|
|
474 |
if (precision > 0)
|
|
|
475 |
digits = dtoa(d, 2, precision, &exponent, &sign, &edigits);
|
|
|
476 |
else {
|
|
|
477 |
digits = dtoa(d, 0, precision, &exponent, &sign, &edigits);
|
|
|
478 |
precision = edigits - digits;
|
|
|
479 |
if (exponent > precision && exponent <= precision + 4)
|
|
|
480 |
precision = exponent;
|
|
|
481 |
}
|
|
|
482 |
if(exponent >= -3 && exponent <= precision){
|
|
|
483 |
fmt = 'f';
|
|
|
484 |
precision -= exponent;
|
|
|
485 |
}else{
|
|
|
486 |
fmt = 'e';
|
|
|
487 |
--precision;
|
|
|
488 |
}
|
|
|
489 |
break;
|
|
|
490 |
}
|
|
|
491 |
if (exponent == 9999) {
|
|
|
492 |
/* Infinity or Nan */
|
|
|
493 |
precision = 0;
|
|
|
494 |
exponent = edigits - digits;
|
|
|
495 |
fmt = 'f';
|
|
|
496 |
}
|
|
|
497 |
ndig = edigits-digits;
|
|
|
498 |
if((afmt=='g' || afmt=='G') && !(flags&ALT)){ /* knock off trailing zeros */
|
|
|
499 |
if(fmt == 'f'){
|
|
|
500 |
if(precision+exponent > ndig) {
|
|
|
501 |
precision = ndig - exponent;
|
|
|
502 |
if(precision < 0)
|
|
|
503 |
precision = 0;
|
|
|
504 |
}
|
|
|
505 |
}
|
|
|
506 |
else{
|
|
|
507 |
if(precision > ndig-1) precision = ndig-1;
|
|
|
508 |
}
|
|
|
509 |
}
|
|
|
510 |
nout = precision; /* digits after decimal point */
|
|
|
511 |
if(precision!=0 || flags&ALT) nout++; /* decimal point */
|
|
|
512 |
if(fmt=='f' && exponent>0) nout += exponent; /* digits before decimal point */
|
|
|
513 |
else nout++; /* there's always at least one */
|
|
|
514 |
if(sign || flags&(SPACE|SIGN)) nout++; /* sign */
|
|
|
515 |
if(fmt != 'f'){ /* exponent */
|
|
|
516 |
eptr = ebuf;
|
|
|
517 |
for(i=exponent<=0?1-exponent:exponent-1; i; i/=10)
|
|
|
518 |
*eptr++ = '0' + i%10;
|
|
|
519 |
while(eptr<ebuf+2) *eptr++ = '0';
|
|
|
520 |
nout += eptr-ebuf+2; /* e+99 */
|
|
|
521 |
}
|
|
|
522 |
if(!(flags&ZPAD) && !(flags&LEFT))
|
|
|
523 |
while(nout < width){
|
|
|
524 |
putc(' ', f);
|
|
|
525 |
nout++;
|
|
|
526 |
}
|
|
|
527 |
if(sign) putc('-', f);
|
|
|
528 |
else if(flags&SIGN) putc('+', f);
|
|
|
529 |
else if(flags&SPACE) putc(' ', f);
|
|
|
530 |
if(flags&ZPAD)
|
|
|
531 |
while(nout < width){
|
|
|
532 |
putc('0', f);
|
|
|
533 |
nout++;
|
|
|
534 |
}
|
|
|
535 |
if(fmt == 'f'){
|
|
|
536 |
for(i=0; i<exponent; i++) putc(i<ndig?digits[i]:'0', f);
|
|
|
537 |
if(i == 0) putc('0', f);
|
|
|
538 |
if(precision>0 || flags&ALT) putc('.', f);
|
|
|
539 |
for(i=0; i!=precision; i++)
|
|
|
540 |
putc(0<=i+exponent && i+exponent<ndig?digits[i+exponent]:'0', f);
|
|
|
541 |
}
|
|
|
542 |
else{
|
|
|
543 |
putc(digits[0], f);
|
|
|
544 |
if(precision>0 || flags&ALT) putc('.', f);
|
|
|
545 |
for(i=0; i!=precision; i++) putc(i<ndig-1?digits[i+1]:'0', f);
|
|
|
546 |
}
|
|
|
547 |
if(fmt != 'f'){
|
|
|
548 |
putc(echr, f);
|
|
|
549 |
putc(exponent<=0?'-':'+', f);
|
|
|
550 |
while(eptr>ebuf) putc(*--eptr, f);
|
|
|
551 |
}
|
|
|
552 |
while(nout < width){
|
|
|
553 |
putc(' ', f);
|
|
|
554 |
nout++;
|
|
|
555 |
}
|
|
|
556 |
freedtoa(digits);
|
|
|
557 |
return nout;
|
|
|
558 |
}
|