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author | markm <markm@FreeBSD.org> | 1997-09-04 06:04:33 +0000 |
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committer | markm <markm@FreeBSD.org> | 1997-09-04 06:04:33 +0000 |
commit | a8a89cfaf983bc64f4b42f7c35209a5a36dd0fe8 (patch) | |
tree | 0b84977f19022a965f8c6145f067f951173f6290 /crypto/kerberosIV/lib/roken/snprintf.c | |
download | FreeBSD-src-a8a89cfaf983bc64f4b42f7c35209a5a36dd0fe8.zip FreeBSD-src-a8a89cfaf983bc64f4b42f7c35209a5a36dd0fe8.tar.gz |
Initial import of KTH eBones. This has been cleaned up to only include
the "core" Kerberos functionality. The rest of the userland will get their
own changes later.
Diffstat (limited to 'crypto/kerberosIV/lib/roken/snprintf.c')
-rw-r--r-- | crypto/kerberosIV/lib/roken/snprintf.c | 520 |
1 files changed, 520 insertions, 0 deletions
diff --git a/crypto/kerberosIV/lib/roken/snprintf.c b/crypto/kerberosIV/lib/roken/snprintf.c new file mode 100644 index 0000000..b0757e5 --- /dev/null +++ b/crypto/kerberosIV/lib/roken/snprintf.c @@ -0,0 +1,520 @@ +/* + * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the Kungliga Tekniska + * Högskolan and its contributors. + * + * 4. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +RCSID("$Id: snprintf.c,v 1.13 1997/05/25 02:00:31 assar Exp $"); +#endif +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <roken.h> + +/* + * Common state + */ + +struct state { + char *str; + char *s; + char *theend; + size_t sz; + size_t max_sz; + int (*append_char)(struct state *, char); + int (*reserve)(struct state *, size_t); + /* XXX - methods */ +}; + +static int +sn_reserve (struct state *state, size_t n) +{ + return state->s + n > state->theend; +} + +static int +sn_append_char (struct state *state, char c) +{ + if (sn_reserve (state, 1)) { + *state->s++ = '\0'; + return 1; + } else { + *state->s++ = c; + return 0; + } +} + +static int +as_reserve (struct state *state, size_t n) +{ + while (state->s + n > state->theend) { + int off = state->s - state->str; + char *tmp; + + if (state->max_sz && state->sz >= state->max_sz) + return 1; + + if (state->max_sz) + state->sz = min(state->max_sz, state->sz*2); + else + state->sz *= 2; + tmp = realloc (state->str, state->sz); + if (tmp == NULL) + return 1; + state->str = tmp; + state->s = state->str + off; + state->theend = state->str + state->sz - 1; + } + return 0; +} + +static int +as_append_char (struct state *state, char c) +{ + if(as_reserve (state, 1)) + return 1; + else { + *state->s++ = c; + return 0; + } +} + +static int +append_number (struct state *state, + unsigned long num, unsigned base, char *rep, + int width, int zerop, int minusp) +{ + int i, len; + + len = 0; + if (num == 0) { + ++len; + if((*state->append_char) (state, '0')) + return 1; + } + while (num > 0) { + ++len; + if ((*state->append_char) (state, rep[num % base])) + return 1; + num /= base; + } + if (minusp) { + ++len; + if ((*state->append_char) (state, '-')) + return 1; + } + + for (i = 0; i < len / 2; ++i) { + char c; + + c = state->s[-i-1]; + state->s[-i-1] = state->s[-len+i]; + state->s[-len+i] = c; + } + + if (width > len) { + if ((*state->reserve) (state, width - len)) + return 1; + +#ifdef HAVE_MEMMOVE + memmove (state->s + width - 2 * len, state->s - len, len); +#else + bcopy (state->s - len, state->s + width - 2 * len, len); +#endif + for (i = 0; i < width - len; ++i) + state->s[-len+i] = (zerop ? '0' : ' '); + state->s += width - len; + + } + return 0; +} + +static int +append_string (struct state *state, + char *arg, + int prec) +{ + if (prec) { + while (*arg && prec--) + if ((*state->append_char) (state, *arg++)) + return 1; + } else { + while (*arg) + if ((*state->append_char) (state, *arg++)) + return 1; + } + return 0; +} + +/* + * This can't be made into a function... + */ + +#define PARSE_INT_FORMAT(res, arg, unsig) \ +if (long_flag) \ + res = va_arg(arg, unsig long); \ +else if (short_flag) \ + res = va_arg(arg, unsig short); \ +else \ + res = va_arg(arg, unsig int) + +/* + * zyxprintf - return 0 or -1 + */ + +static int +xyzprintf (struct state *state, const char *format, va_list ap) +{ + char c; + + while((c = *format++)) { + if (c == '%') { + int zerop = 0; + int width = 0; + int prec = 0; + int long_flag = 0; + int short_flag = 0; + + c = *format++; + + /* flags */ + if (c == '0') { + zerop = 1; + c = *format++; + } + + /* width */ + if (isdigit(c)) + do { + width = width * 10 + c - '0'; + c = *format++; + } while(isdigit(c)); + else if(c == '*') { + width = va_arg(ap, int); + c = *format++; + } + + /* precision */ + if (c == '.') { + c = *format++; + if (isdigit(c)) + do { + prec = prec * 10 + c - '0'; + c = *format++; + } while(isdigit(c)); + else if (c == '*') { + prec = va_arg(ap, int); + c = *format++; + } + } + + /* size */ + + if (c == 'h') { + short_flag = 1; + c = *format++; + } else if (c == 'l') { + long_flag = 1; + c = *format++; + } + + switch (c) { + case 'c' : + if ((*state->append_char)(state, (unsigned char)va_arg(ap, int))) + return -1; + break; + case 's' : + if (append_string(state, + va_arg(ap, char*), + prec)) + return -1; + break; + case 'd' : + case 'i' : { + long arg; + unsigned long num; + int minusp = 0; + + PARSE_INT_FORMAT(arg, ap, ); + + if (arg < 0) { + minusp = 1; + num = -arg; + } else + num = arg; + + if (append_number (state, num, 10, "0123456789", + width, zerop, minusp)) + return -1; + break; + } + case 'u' : { + unsigned long arg; + + PARSE_INT_FORMAT(arg, ap, unsigned); + + if (append_number (state, arg, 10, "0123456789", + width, zerop, 0)) + return -1; + break; + } + case 'o' : { + unsigned long arg; + + PARSE_INT_FORMAT(arg, ap, unsigned); + + if (append_number (state, arg, 010, "01234567", + width, zerop, 0)) + return -1; + break; + } + case 'x' : { + unsigned long arg; + + PARSE_INT_FORMAT(arg, ap, unsigned); + + if (append_number (state, arg, 0x10, "0123456789abcdef", + width, zerop, 0)) + return -1; + break; + } + case 'X' :{ + unsigned long arg; + + PARSE_INT_FORMAT(arg, ap, unsigned); + + if (append_number (state, arg, 0x10, "0123456789ABCDEF", + width, zerop, 0)) + return -1; + break; + } + case 'p' : { + unsigned long arg = (unsigned long)va_arg(ap, void*); + + if (append_number (state, arg, 0x10, "0123456789ABCDEF", + width, zerop, 0)) + return -1; + break; + } + case '%' : + if ((*state->append_char)(state, c)) + return -1; + break; + default : + if ( (*state->append_char)(state, '%') + || (*state->append_char)(state, c)) + return -1; + break; + } + } else + if ((*state->append_char) (state, c)) + return -1; + } + return 0; +} + +#ifndef HAVE_SNPRINTF +int +snprintf (char *str, size_t sz, const char *format, ...) +{ + va_list args; + int ret; + + va_start(args, format); + ret = vsnprintf (str, sz, format, args); + +#ifdef PARANOIA + { + int ret2; + char *tmp; + + tmp = malloc (sz); + if (tmp == NULL) + abort (); + + ret2 = vsprintf (tmp, format, args); + if (ret != ret2 || strcmp(str, tmp)) + abort (); + free (tmp); + } +#endif + + va_end(args); + return ret; +} +#endif + +#ifndef HAVE_ASPRINTF +int +asprintf (char **ret, const char *format, ...) +{ + va_list args; + int val; + + va_start(args, format); + val = vasprintf (ret, format, args); + +#ifdef PARANOIA + { + int ret2; + char *tmp; + tmp = malloc (val + 1); + if (tmp == NULL) + abort (); + + ret2 = vsprintf (tmp, format, args); + if (val != ret2 || strcmp(*ret, tmp)) + abort (); + free (tmp); + } +#endif + + va_end(args); + return val; +} +#endif + +#ifndef HAVE_ASNPRINTF +int +asnprintf (char **ret, size_t max_sz, const char *format, ...) +{ + va_list args; + int val; + + va_start(args, format); + val = vasnprintf (ret, max_sz, format, args); + +#ifdef PARANOIA + { + int ret2; + char *tmp; + tmp = malloc (val + 1); + if (tmp == NULL) + abort (); + + ret2 = vsprintf (tmp, format, args); + if (val != ret2 || strcmp(*ret, tmp)) + abort (); + free (tmp); + } +#endif + + va_end(args); + return val; +} +#endif + +#ifndef HAVE_VASPRINTF +int +vasprintf (char **ret, const char *format, va_list args) +{ + return vasnprintf (ret, 0, format, args); +} +#endif + + +#ifndef HAVE_VASNPRINTF +int +vasnprintf (char **ret, size_t max_sz, const char *format, va_list args) +{ + int st; + size_t len; + struct state state; + + state.max_sz = max_sz; + if (max_sz) + state.sz = min(1, max_sz); + else + state.sz = 1; + state.str = malloc(state.sz); + if (state.str == NULL) { + *ret = NULL; + return -1; + } + state.s = state.str; + state.theend = state.s + state.sz - 1; + state.append_char = as_append_char; + state.reserve = as_reserve; + + st = xyzprintf (&state, format, args); + if (st) { + free (state.str); + *ret = NULL; + return -1; + } else { + char *tmp; + + *state.s = '\0'; + len = state.s - state.str; + tmp = realloc (state.str, len+1); + if (state.str == NULL) { + free (state.str); + *ret = NULL; + return -1; + } + *ret = tmp; + return len; + } +} +#endif + +#ifndef HAVE_VSNPRINTF +int +vsnprintf (char *str, size_t sz, const char *format, va_list args) +{ + struct state state; + int ret; + + state.max_sz = 0; + state.sz = sz; + state.str = str; + state.s = str; + state.theend = str + sz - 1; + state.append_char = sn_append_char; + state.reserve = sn_reserve; + + ret = xyzprintf (&state, format, args); + *state.s = '\0'; + if (ret) + return sz; + else + return state.s - state.str; +} +#endif + |