+++ /dev/null
-/*
- * Copyright (c) 1995-1999 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. 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.
- */
-
-#include <config.h>
-
-#include <stdio.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <sys/types.h>
-
-#include "netdissect.h"
-
-enum format_flags {
- minus_flag = 1,
- plus_flag = 2,
- space_flag = 4,
- alternate_flag = 8,
- zero_flag = 16
-};
-
-/*
- * Common state
- */
-
-struct state {
- unsigned char *str;
- unsigned char *s;
- unsigned char *theend;
- size_t sz;
- size_t max_sz;
- int (*append_char)(struct state *, unsigned char);
- int (*reserve)(struct state *, size_t);
- /* XXX - methods */
-};
-
-#if 0
-static int
-as_reserve (struct state *state, size_t n)
-{
- if (state->s + n > state->theend) {
- int off = state->s - state->str;
- unsigned char *tmp;
-
- if (state->max_sz && state->sz >= state->max_sz)
- return 1;
-
- state->sz = max(state->sz * 2, state->sz + n);
- if (state->max_sz)
- state->sz = min(state->sz, state->max_sz);
- 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, unsigned char c)
-{
- if(as_reserve (state, 1))
- return 1;
- else {
- *state->s++ = c;
- return 0;
- }
-}
-#endif
-
-static int
-append_number(struct state *state,
- unsigned long num, unsigned base, char *rep,
- int width, int prec, int flags, int minusp)
-{
- int len = 0;
- int i;
-
- /* given precision, ignore zero flag */
- if(prec != -1)
- flags &= ~zero_flag;
- else
- prec = 1;
- /* zero value with zero precision -> "" */
- if(prec == 0 && num == 0)
- return 0;
- do{
- if((*state->append_char)(state, rep[num % base]))
- return 1;
- len++;
- num /= base;
- }while(num);
- prec -= len;
- /* pad with prec zeros */
- while(prec-- > 0){
- if((*state->append_char)(state, '0'))
- return 1;
- len++;
- }
- /* add length of alternate prefix (added later) to len */
- if(flags & alternate_flag && (base == 16 || base == 8))
- len += base / 8;
- /* pad with zeros */
- if(flags & zero_flag){
- width -= len;
- if(minusp || (flags & space_flag) || (flags & plus_flag))
- width--;
- while(width-- > 0){
- if((*state->append_char)(state, '0'))
- return 1;
- len++;
- }
- }
- /* add alternate prefix */
- if(flags & alternate_flag && (base == 16 || base == 8)){
- if(base == 16)
- if((*state->append_char)(state, rep[10] + 23)) /* XXX */
- return 1;
- if((*state->append_char)(state, '0'))
- return 1;
- }
- /* add sign */
- if(minusp){
- if((*state->append_char)(state, '-'))
- return 1;
- len++;
- } else if(flags & plus_flag) {
- if((*state->append_char)(state, '+'))
- return 1;
- len++;
- } else if(flags & space_flag) {
- if((*state->append_char)(state, ' '))
- return 1;
- len++;
- }
- if(flags & minus_flag)
- /* swap before padding with spaces */
- for(i = 0; i < len / 2; i++){
- char c = state->s[-i-1];
- state->s[-i-1] = state->s[-len+i];
- state->s[-len+i] = c;
- }
- width -= len;
- while(width-- > 0){
- if((*state->append_char)(state, ' '))
- return 1;
- len++;
- }
- if(!(flags & minus_flag))
- /* swap after padding with spaces */
- for(i = 0; i < len / 2; i++){
- char c = state->s[-i-1];
- state->s[-i-1] = state->s[-len+i];
- state->s[-len+i] = c;
- }
-
- return 0;
-}
-
-static int
-append_string (struct state *state,
- unsigned char *arg,
- int width,
- int prec,
- int flags)
-{
- if(prec != -1)
- width -= prec;
- else
- width -= strlen((char *)arg);
- if(!(flags & minus_flag))
- while(width-- > 0)
- if((*state->append_char) (state, ' '))
- return 1;
- if (prec != -1) {
- while (*arg && prec--)
- if ((*state->append_char) (state, *arg++))
- return 1;
- } else {
- while (*arg)
- if ((*state->append_char) (state, *arg++))
- return 1;
- }
- if(flags & minus_flag)
- while(width-- > 0)
- if((*state->append_char) (state, ' '))
- return 1;
- return 0;
-}
-
-static int
-append_char(struct state *state,
- unsigned char arg,
- int width,
- int flags)
-{
- while(!(flags & minus_flag) && --width > 0)
- if((*state->append_char) (state, ' '))
- return 1;
-
- if((*state->append_char) (state, arg))
- return 1;
- while((flags & minus_flag) && --width > 0)
- if((*state->append_char) (state, ' '))
- return 1;
-
- return 0;
-}
-
-/*
- * This can't be made into a function...
- */
-
-#define PARSE_INT_FORMAT(res, arg, unsig) \
-if (long_flag) \
- res = (unsig long)va_arg(arg, unsig long); \
-else if (short_flag) \
- res = (unsig short)va_arg(arg, unsig int); \
-else \
- res = (unsig int)va_arg(arg, unsig int)
-
-/*
- * zyxprintf - return 0 or -1
- */
-
-static int
-xyzprintf (struct state *state, const char *char_format, va_list ap)
-{
- const unsigned char *format = (const unsigned char *)char_format;
- unsigned char c;
-
- while((c = *format++)) {
- if (c == '%') {
- int flags = 0;
- int width = 0;
- int prec = -1;
- int long_flag = 0;
- int short_flag = 0;
-
- /* flags */
- while((c = *format++)){
- if(c == '-')
- flags |= minus_flag;
- else if(c == '+')
- flags |= plus_flag;
- else if(c == ' ')
- flags |= space_flag;
- else if(c == '#')
- flags |= alternate_flag;
- else if(c == '0')
- flags |= zero_flag;
- else
- break;
- }
-
- if((flags & space_flag) && (flags & plus_flag))
- flags ^= space_flag;
-
- if((flags & minus_flag) && (flags & zero_flag))
- flags ^= zero_flag;
-
- /* 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 == '.') {
- prec = 0;
- 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(append_char(state, va_arg(ap, int), width, flags))
- return -1;
- break;
- case 's' :
- if (append_string(state,
- va_arg(ap, unsigned char*),
- width,
- prec,
- flags))
- return -1;
- break;
- case 'd' :
- case 'i' : {
- long arg;
- unsigned long num;
- int minusp = 0;
-
- PARSE_INT_FORMAT(arg, ap, signed);
-
- if (arg < 0) {
- minusp = 1;
- num = -arg;
- } else
- num = arg;
-
- if (append_number (state, num, 10, "0123456789",
- width, prec, flags, minusp))
- return -1;
- break;
- }
- case 'u' : {
- unsigned long arg;
-
- PARSE_INT_FORMAT(arg, ap, unsigned);
-
- if (append_number (state, arg, 10, "0123456789",
- width, prec, flags, 0))
- return -1;
- break;
- }
- case 'o' : {
- unsigned long arg;
-
- PARSE_INT_FORMAT(arg, ap, unsigned);
-
- if (append_number (state, arg, 010, "01234567",
- width, prec, flags, 0))
- return -1;
- break;
- }
- case 'x' : {
- unsigned long arg;
-
- PARSE_INT_FORMAT(arg, ap, unsigned);
-
- if (append_number (state, arg, 0x10, "0123456789abcdef",
- width, prec, flags, 0))
- return -1;
- break;
- }
- case 'X' :{
- unsigned long arg;
-
- PARSE_INT_FORMAT(arg, ap, unsigned);
-
- if (append_number (state, arg, 0x10, "0123456789ABCDEF",
- width, prec, flags, 0))
- return -1;
- break;
- }
- case 'p' : {
- unsigned long arg = (unsigned long)va_arg(ap, void*);
-
- if (append_number (state, arg, 0x10, "0123456789ABCDEF",
- width, prec, flags, 0))
- return -1;
- break;
- }
- case 'n' : {
- int *arg = va_arg(ap, int *);
- *arg = state->s - state->str;
- break;
- }
- case '\0' :
- --format;
- /* FALLTHROUGH */
- 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;
-}
-
-#if 0
-#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_VASNPRINTF
-int
-nd_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;
- 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 (tmp == NULL) {
- free (state.str);
- *ret = NULL;
- return -1;
- }
- *ret = tmp;
- return len;
- }
-}
-#endif
-#endif
projects / tcpdump / commitdiff
