]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Mach Operating System | |
3 | * Copyright (c) 1991,1990,1989 Carnegie Mellon University | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission to use, copy, modify and distribute this software and its | |
7 | * documentation is hereby granted, provided that both the copyright | |
8 | * notice and this permission notice appear in all copies of the | |
9 | * software, derivative works or modified versions, and any portions | |
10 | * thereof, and that both notices appear in supporting documentation. | |
11 | * | |
12 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
13 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR | |
14 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
15 | * | |
16 | * Carnegie Mellon requests users of this software to return to | |
17 | * | |
18 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
19 | * School of Computer Science | |
20 | * Carnegie Mellon University | |
21 | * Pittsburgh PA 15213-3890 | |
22 | * | |
23 | * any improvements or extensions that they make and grant Carnegie Mellon | |
24 | * the rights to redistribute these changes. | |
25 | */ | |
26 | ||
27 | #include <stdarg.h> | |
28 | #include "doprnt.h" | |
29 | ||
30 | #define SPRINTF_UNLIMITED -1 | |
31 | struct sprintf_state { | |
32 | char *buf; | |
33 | unsigned int len; | |
34 | unsigned int max; | |
35 | }; | |
36 | ||
37 | static void | |
38 | savechar(char *arg, int c) | |
39 | { | |
40 | struct sprintf_state *state = (struct sprintf_state *)arg; | |
41 | ||
42 | if (state->max != SPRINTF_UNLIMITED) | |
43 | { | |
44 | if (state->len == state->max) | |
45 | return; | |
46 | } | |
47 | ||
48 | state->len++; | |
49 | *state->buf = c; | |
50 | state->buf++; | |
51 | } | |
52 | ||
53 | int vsprintf(char *s, const char *fmt, va_list args) | |
54 | { | |
55 | struct sprintf_state state; | |
56 | state.max = SPRINTF_UNLIMITED; | |
57 | state.len = 0; | |
58 | state.buf = s; | |
59 | ||
60 | _doprnt(fmt, args, 0, (void (*)()) savechar, (char *) &state); | |
61 | *(state.buf) = '\0'; | |
62 | ||
63 | return state.len; | |
64 | } | |
65 | ||
66 | int vsnprintf(char *s, int size, const char *fmt, va_list args) | |
67 | { | |
68 | struct sprintf_state state; | |
69 | state.max = size; | |
70 | state.len = 0; | |
71 | state.buf = s; | |
72 | ||
73 | _doprnt(fmt, args, 0, (void (*)()) savechar, (char *) &state); | |
74 | *(state.buf) = '\0'; | |
75 | ||
76 | return state.len; | |
77 | } | |
78 | ||
79 | int sprintf(char *s, const char *fmt, ...) | |
80 | { | |
81 | va_list args; | |
82 | int err; | |
83 | ||
84 | va_start(args, fmt); | |
85 | err = vsprintf(s, fmt, args); | |
86 | va_end(args); | |
87 | ||
88 | return err; | |
89 | } | |
90 | ||
91 | int snprintf(char *s, int size, const char *fmt, ...) | |
92 | { | |
93 | va_list args; | |
94 | int err; | |
95 | ||
96 | va_start(args, fmt); | |
97 | err = vsnprintf(s, size, fmt, args); | |
98 | va_end(args); | |
99 | ||
100 | return err; | |
101 | } | |
102 |