projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| cfc687a9 KB |
1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * %sccs.include.redist.c% | |
| 6 | * | |
| 7 | * @(#)clnp_sprintf.c 7.1 (Berkeley) %G% | |
| 8 | */ | |
| 9 | ||
| 10 | /* | |
| 11 | * CLNP needs a version of sprintf in the kernel. If anything else | |
| 12 | * ever needs it, this can trivially be dropped into kern/subr_prf.c. | |
| 13 | */ | |
| 14 | #include "param.h" | |
| 15 | ||
| 16 | /* | |
| 17 | * Note that stdarg.h and the ANSI style va_start macro is used for both | |
| 18 | * ANSI and traditional C compilers. | |
| 19 | */ | |
| 20 | #include <machine/stdarg.h> | |
| 21 | ||
| 22 | int sprintf __P((char *, const char *, ...)); | |
| 23 | ||
| 24 | /* | |
| 25 | * Scaled down version of sprintf(3). | |
| 26 | */ | |
| 27 | #ifdef __STDC__ | |
| 28 | sprintf(char *buf, const char *fmt, ...) | |
| 29 | #else | |
| 30 | sprintf(buf, fmt /*, va_alist */) | |
| 31 | char *buf, *fmt; | |
| 32 | #endif | |
| 33 | { | |
| 34 | register char *p, *bp; | |
| 35 | register int ch, base; | |
| 36 | u_long ul; | |
| 37 | int lflag; /* hold a long in base 8 */ | |
| 38 | char num[(sizeof(long) * NBBY / 3) + 1]; | |
| 39 | va_list ap; | |
| 40 | ||
| 41 | va_start(ap, fmt); | |
| 42 | for (bp = buf;;) { | |
| 43 | while ((ch = *fmt++) != '%') { | |
| 44 | if ((*bp = ch) == '\0') | |
| 45 | return(bp - buf); | |
| 46 | *bp++ = ch; | |
| 47 | } | |
| 48 | lflag = 0; | |
| 49 | reswitch: switch (ch = *fmt++) { | |
| 50 | case 'l': | |
| 51 | lflag = 1; | |
| 52 | goto reswitch; | |
| 53 | case 'c': | |
| 54 | *bp++ = va_arg(ap, int); | |
| 55 | break; | |
| 56 | case 's': | |
| 57 | p = va_arg(ap, char *); | |
| 58 | while (*bp++ = *p++); | |
| 59 | --bp; | |
| 60 | break; | |
| 61 | case 'D': | |
| 62 | lflag = 1; | |
| 63 | /* FALLTHROUGH */ | |
| 64 | case 'd': | |
| 65 | ul = lflag ? | |
| 66 | va_arg(ap, long) : va_arg(ap, int); | |
| 67 | if ((long)ul < 0) { | |
| 68 | *bp++ = '-'; | |
| 69 | ul = -(long)ul; | |
| 70 | } | |
| 71 | base = 10; | |
| 72 | goto number; | |
| 73 | break; | |
| 74 | case 'O': | |
| 75 | lflag = 1; | |
| 76 | /* FALLTHROUGH */ | |
| 77 | case 'o': | |
| 78 | ul = lflag ? | |
| 79 | va_arg(ap, u_long) : va_arg(ap, u_int); | |
| 80 | base = 8; | |
| 81 | goto number; | |
| 82 | break; | |
| 83 | case 'U': | |
| 84 | lflag = 1; | |
| 85 | /* FALLTHROUGH */ | |
| 86 | case 'u': | |
| 87 | ul = lflag ? | |
| 88 | va_arg(ap, u_long) : va_arg(ap, u_int); | |
| 89 | base = 10; | |
| 90 | goto number; | |
| 91 | break; | |
| 92 | case 'X': | |
| 93 | lflag = 1; | |
| 94 | /* FALLTHROUGH */ | |
| 95 | case 'x': | |
| 96 | ul = lflag ? | |
| 97 | va_arg(ap, u_long) : va_arg(ap, u_int); | |
| 98 | base = 16; | |
| 99 | number: p = num; | |
| 100 | do { | |
| 101 | *p++ = "0123456789abcdef"[ul % base]; | |
| 102 | } while (ul /= base); | |
| 103 | do { | |
| 104 | *bp++ = *--p; | |
| 105 | } while (p > num); | |
| 106 | break; | |
| 107 | default: | |
| 108 | *bp++ = '%'; | |
| 109 | if (lflag) | |
| 110 | *bp++ = 'l'; | |
| 111 | *bp++ = ch; | |
| 112 | } | |
| 113 | } | |
| 114 | va_end(ap); | |
| 115 | } |