minix/tools/compat/snprintf.c
Thomas Veerman c8a0e2f4c6 Import NetBSD tools and build.sh
This commit finalizes support for cross compilation. The tools
directory are all links to the actual tools and are built on the
host system to build Minix. build.sh is the work horse that takes
care of all environment settings. It's slightly adjusted for Minix.
The /usr/src/Makefile has additional targets needed for cross
compilation.
2012-06-18 10:54:51 +00:00

663 lines
14 KiB
C

/*
* Copyright (c) 1995-2001 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.
*/
/* From heimdal lib/roken/snprintf.c. */
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#if 0
RCSID("$Id: snprintf.c,v 1.3 2003/10/27 00:12:43 lukem Exp $");
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#if 0
#include <roken.h>
#endif
#undef min
#define min(a,b) ((a) < (b) ? (a) : (b))
#undef max
#define max(a,b) ((a) > (b) ? (a) : (b))
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;
void (*append_char)(struct state *, unsigned char);
/* XXX - methods */
};
#if TEST_SNPRINTF
#include "snprintf-test.h"
#endif /* TEST_SNPRINTF */
#if !defined(HAVE_VSNPRINTF) || defined(TEST_SNPRINTF)
static int
sn_reserve (struct state *state, size_t n)
{
return state->s + n > state->theend;
}
static void
sn_append_char (struct state *state, unsigned char c)
{
if (!sn_reserve (state, 1))
*state->s++ = c;
}
#endif
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 void
as_append_char (struct state *state, unsigned char c)
{
if(!as_reserve (state, 1))
*state->s++ = c;
}
/* longest integer types */
#ifdef HAVE_LONG_LONG
typedef unsigned long long u_longest;
typedef long long longest;
#else
typedef unsigned long u_longest;
typedef long longest;
#endif
/*
* is # supposed to do anything?
*/
static int
use_alternative (int flags, u_longest num, unsigned base)
{
return flags & alternate_flag && (base == 16 || base == 8) && num != 0;
}
static int
append_number(struct state *state,
u_longest num, unsigned base, char *rep,
int width, int prec, int flags, int minusp)
{
int len = 0;
int i;
u_longest n = num;
/* given precision, ignore zero flag */
if(prec != -1)
flags &= ~zero_flag;
else
prec = 1;
/* zero value with zero precision -> "" */
if(prec == 0 && n == 0)
return 0;
do{
(*state->append_char)(state, rep[n % base]);
++len;
n /= base;
} while(n);
prec -= len;
/* pad with prec zeros */
while(prec-- > 0){
(*state->append_char)(state, '0');
++len;
}
/* add length of alternate prefix (added later) to len */
if(use_alternative(flags, num, base))
len += base / 8;
/* pad with zeros */
if(flags & zero_flag){
width -= len;
if(minusp || (flags & space_flag) || (flags & plus_flag))
width--;
while(width-- > 0){
(*state->append_char)(state, '0');
len++;
}
}
/* add alternate prefix */
if(use_alternative(flags, num, base)){
if(base == 16)
(*state->append_char)(state, rep[10] + 23); /* XXX */
(*state->append_char)(state, '0');
}
/* add sign */
if(minusp){
(*state->append_char)(state, '-');
++len;
} else if(flags & plus_flag) {
(*state->append_char)(state, '+');
++len;
} else if(flags & space_flag) {
(*state->append_char)(state, ' ');
++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){
(*state->append_char)(state, ' ');
++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 len;
}
/*
* return length
*/
static int
append_string (struct state *state,
const unsigned char *arg,
int width,
int prec,
int flags)
{
int len = 0;
if(arg == NULL)
arg = (const unsigned char*)"(null)";
if(prec != -1)
width -= prec;
else
width -= strlen((const char *)arg);
if(!(flags & minus_flag))
while(width-- > 0) {
(*state->append_char) (state, ' ');
++len;
}
if (prec != -1) {
while (*arg && prec--) {
(*state->append_char) (state, *arg++);
++len;
}
} else {
while (*arg) {
(*state->append_char) (state, *arg++);
++len;
}
}
if(flags & minus_flag)
while(width-- > 0) {
(*state->append_char) (state, ' ');
++len;
}
return len;
}
static int
append_char(struct state *state,
unsigned char arg,
int width,
int flags)
{
int len = 0;
while(!(flags & minus_flag) && --width > 0) {
(*state->append_char) (state, ' ') ;
++len;
}
(*state->append_char) (state, arg);
++len;
while((flags & minus_flag) && --width > 0) {
(*state->append_char) (state, ' ');
++len;
}
return 0;
}
/*
* This can't be made into a function...
*/
#ifdef HAVE_LONG_LONG
#define PARSE_INT_FORMAT(res, arg, unsig) \
if (long_long_flag) \
res = (unsig long long)va_arg(arg, unsig long long); \
else 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)
#else
#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)
#endif
/*
* zyxprintf - return length, as snprintf
*/
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;
int len = 0;
while((c = *format++)) {
if (c == '%') {
int flags = 0;
int width = 0;
int prec = -1;
int long_long_flag = 0;
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++;
if (c == 'l') {
long_long_flag = 1;
c = *format++;
}
}
switch (c) {
case 'c' :
append_char(state, va_arg(ap, int), width, flags);
++len;
break;
case 's' :
len += append_string(state,
va_arg(ap, unsigned char*),
width,
prec,
flags);
break;
case 'd' :
case 'i' : {
longest arg;
u_longest num;
int minusp = 0;
PARSE_INT_FORMAT(arg, ap, signed);
if (arg < 0) {
minusp = 1;
num = -arg;
} else
num = arg;
len += append_number (state, num, 10, "0123456789",
width, prec, flags, minusp);
break;
}
case 'u' : {
u_longest arg;
PARSE_INT_FORMAT(arg, ap, unsigned);
len += append_number (state, arg, 10, "0123456789",
width, prec, flags, 0);
break;
}
case 'o' : {
u_longest arg;
PARSE_INT_FORMAT(arg, ap, unsigned);
len += append_number (state, arg, 010, "01234567",
width, prec, flags, 0);
break;
}
case 'x' : {
u_longest arg;
PARSE_INT_FORMAT(arg, ap, unsigned);
len += append_number (state, arg, 0x10, "0123456789abcdef",
width, prec, flags, 0);
break;
}
case 'X' :{
u_longest arg;
PARSE_INT_FORMAT(arg, ap, unsigned);
len += append_number (state, arg, 0x10, "0123456789ABCDEF",
width, prec, flags, 0);
break;
}
case 'p' : {
unsigned long arg = (unsigned long)va_arg(ap, void*);
len += append_number (state, arg, 0x10, "0123456789ABCDEF",
width, prec, flags, 0);
break;
}
case 'n' : {
int *arg = va_arg(ap, int*);
*arg = state->s - state->str;
break;
}
case '\0' :
--format;
/* FALLTHROUGH */
case '%' :
(*state->append_char)(state, c);
++len;
break;
default :
(*state->append_char)(state, '%');
(*state->append_char)(state, c);
len += 2;
break;
}
} else {
(*state->append_char) (state, c);
++len;
}
}
return len;
}
#if !defined(HAVE_SNPRINTF) || defined(TEST_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);
va_end(args);
#ifdef PARANOIA
{
int ret2;
char *tmp;
tmp = malloc (sz);
if (tmp == NULL)
abort ();
va_start(args, format);
ret2 = vsprintf (tmp, format, args);
va_end(args);
if (ret != ret2 || strcmp(str, tmp))
abort ();
free (tmp);
}
#endif
return ret;
}
#endif
#if !defined(HAVE_ASPRINTF) || defined(TEST_SNPRINTF)
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
#if !defined(HAVE_ASNPRINTF) || defined(TEST_SNPRINTF)
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
#if !defined(HAVE_VASPRINTF) || defined(TEST_SNPRINTF)
int
vasprintf (char **ret, const char *format, va_list args)
{
return vasnprintf (ret, 0, format, args);
}
#endif
#if !defined(HAVE_VASNPRINTF) || defined(TEST_SNPRINTF)
int
vasnprintf (char **ret, size_t max_sz, const char *format, va_list args)
{
int st;
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;
st = xyzprintf (&state, format, args);
if (st > state.sz) {
free (state.str);
*ret = NULL;
return -1;
} else {
char *tmp;
*state.s = '\0';
tmp = realloc (state.str, st+1);
if (tmp == NULL) {
free (state.str);
*ret = NULL;
return -1;
}
*ret = tmp;
return st;
}
}
#endif
#if !defined(HAVE_VSNPRINTF) || defined(TEST_SNPRINTF)
int
vsnprintf (char *str, size_t sz, const char *format, va_list args)
{
struct state state;
int ret;
unsigned char *ustr = (unsigned char *)str;
state.max_sz = 0;
state.sz = sz;
state.str = ustr;
state.s = ustr;
state.theend = ustr + sz - (sz > 0);
state.append_char = sn_append_char;
ret = xyzprintf (&state, format, args);
if (state.s != NULL)
*state.s = '\0';
return ret;
}
#endif