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freebsd-dev/compat/snprintf.c
Dag-Erling Smørgrav a7af7146c9 import unbound 1.5.7
2015-12-12 22:18:57 +00:00

1038 lines
29 KiB
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/* snprintf - compatibility implementation of snprintf, vsnprintf
*
* Copyright (c) 2013, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the NLNET LABS 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 COPYRIGHT HOLDERS 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 COPYRIGHT
* HOLDER 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 <ctype.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <errno.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <limits.h>
/* for test */
/* #define SNPRINTF_TEST 1 */
#ifdef SNPRINTF_TEST
#define snprintf my_snprintf
#define vsnprintf my_vsnprintf
#endif /* SNPRINTF_TEST */
int snprintf(char* str, size_t size, const char* format, ...);
int vsnprintf(char* str, size_t size, const char* format, va_list arg);
/**
* Very portable snprintf implementation, limited in functionality,
* esp. for %[capital] %[nonportable] and so on. Reduced float functionality,
* mostly in formatting and range (e+-16), for %f and %g.
*
* %s, %d, %u, %i, %x, %c, %n and %% are fully supported.
* This includes width, precision, flags 0- +, and *(arg for wid,prec).
* %f, %g, %m, %p have reduced support, support for wid,prec,flags,*, but
* less floating point range, no %e formatting for %g.
*/
int snprintf(char* str, size_t size, const char* format, ...)
{
int r;
va_list args;
va_start(args, format);
r = vsnprintf(str, size, format, args);
va_end(args);
return r;
}
/** add padding to string */
static void
print_pad(char** at, size_t* left, int* ret, char p, int num)
{
while(num--) {
if(*left > 1) {
*(*at)++ = p;
(*left)--;
}
(*ret)++;
}
}
/** get negative symbol, 0 if none */
static char
get_negsign(int negative, int plus, int space)
{
if(negative)
return '-';
if(plus)
return '+';
if(space)
return ' ';
return 0;
}
#define PRINT_DEC_BUFSZ 32 /* 20 is enough for 64 bit decimals */
/** print decimal into buffer, returns length */
static int
print_dec(char* buf, int max, unsigned int value)
{
int i = 0;
if(value == 0) {
if(max > 0) {
buf[0] = '0';
i = 1;
}
} else while(value && i < max) {
buf[i++] = '0' + value % 10;
value /= 10;
}
return i;
}
/** print long decimal into buffer, returns length */
static int
print_dec_l(char* buf, int max, unsigned long value)
{
int i = 0;
if(value == 0) {
if(max > 0) {
buf[0] = '0';
i = 1;
}
} else while(value && i < max) {
buf[i++] = '0' + value % 10;
value /= 10;
}
return i;
}
/** print long decimal into buffer, returns length */
static int
print_dec_ll(char* buf, int max, unsigned long long value)
{
int i = 0;
if(value == 0) {
if(max > 0) {
buf[0] = '0';
i = 1;
}
} else while(value && i < max) {
buf[i++] = '0' + value % 10;
value /= 10;
}
return i;
}
/** print hex into buffer, returns length */
static int
print_hex(char* buf, int max, unsigned int value)
{
const char* h = "0123456789abcdef";
int i = 0;
if(value == 0) {
if(max > 0) {
buf[0] = '0';
i = 1;
}
} else while(value && i < max) {
buf[i++] = h[value & 0x0f];
value >>= 4;
}
return i;
}
/** print long hex into buffer, returns length */
static int
print_hex_l(char* buf, int max, unsigned long value)
{
const char* h = "0123456789abcdef";
int i = 0;
if(value == 0) {
if(max > 0) {
buf[0] = '0';
i = 1;
}
} else while(value && i < max) {
buf[i++] = h[value & 0x0f];
value >>= 4;
}
return i;
}
/** print long long hex into buffer, returns length */
static int
print_hex_ll(char* buf, int max, unsigned long long value)
{
const char* h = "0123456789abcdef";
int i = 0;
if(value == 0) {
if(max > 0) {
buf[0] = '0';
i = 1;
}
} else while(value && i < max) {
buf[i++] = h[value & 0x0f];
value >>= 4;
}
return i;
}
/** copy string into result, reversed */
static void
spool_str_rev(char** at, size_t* left, int* ret, const char* buf, int len)
{
int i = len;
while(i) {
if(*left > 1) {
*(*at)++ = buf[--i];
(*left)--;
} else --i;
(*ret)++;
}
}
/** copy string into result */
static void
spool_str(char** at, size_t* left, int* ret, const char* buf, int len)
{
int i;
for(i=0; i<len; i++) {
if(*left > 1) {
*(*at)++ = buf[i];
(*left)--;
}
(*ret)++;
}
}
/** print number formatted */
static void
print_num(char** at, size_t* left, int* ret, int minw, int precision,
int prgiven, int zeropad, int minus, int plus, int space,
int zero, int negative, char* buf, int len)
{
int w = len; /* excludes minus sign */
char s = get_negsign(negative, plus, space);
if(minus) {
/* left adjust the number into the field, space padding */
/* calc numw = [sign][zeroes][number] */
int numw = w;
if(precision == 0 && zero) numw = 0;
if(numw < precision) numw = precision;
if(s) numw++;
/* sign */
if(s) print_pad(at, left, ret, s, 1);
/* number */
if(precision == 0 && zero) {
/* "" for the number */
} else {
if(w < precision)
print_pad(at, left, ret, '0', precision - w);
spool_str_rev(at, left, ret, buf, len);
}
/* spaces */
if(numw < minw)
print_pad(at, left, ret, ' ', minw - numw);
} else {
/* pad on the left of the number */
/* calculate numw has width of [sign][zeroes][number] */
int numw = w;
if(precision == 0 && zero) numw = 0;
if(numw < precision) numw = precision;
if(!prgiven && zeropad && numw < minw) numw = minw;
else if(s) numw++;
/* pad with spaces */
if(numw < minw)
print_pad(at, left, ret, ' ', minw - numw);
/* print sign (and one less zeropad if so) */
if(s) {
print_pad(at, left, ret, s, 1);
numw--;
}
/* pad with zeroes */
if(w < numw)
print_pad(at, left, ret, '0', numw - w);
if(precision == 0 && zero)
return;
/* print the characters for the value */
spool_str_rev(at, left, ret, buf, len);
}
}
/** print %d and %i */
static void
print_num_d(char** at, size_t* left, int* ret, int value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = (value < 0);
int zero = (value == 0);
int len = print_dec(buf, (int)sizeof(buf),
(unsigned int)(negative?-value:value));
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %ld and %li */
static void
print_num_ld(char** at, size_t* left, int* ret, long value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = (value < 0);
int zero = (value == 0);
int len = print_dec_l(buf, (int)sizeof(buf),
(unsigned long)(negative?-value:value));
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %lld and %lli */
static void
print_num_lld(char** at, size_t* left, int* ret, long long value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = (value < 0);
int zero = (value == 0);
int len = print_dec_ll(buf, (int)sizeof(buf),
(unsigned long long)(negative?-value:value));
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %u */
static void
print_num_u(char** at, size_t* left, int* ret, unsigned int value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = 0;
int zero = (value == 0);
int len = print_dec(buf, (int)sizeof(buf), value);
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %lu */
static void
print_num_lu(char** at, size_t* left, int* ret, unsigned long value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = 0;
int zero = (value == 0);
int len = print_dec_l(buf, (int)sizeof(buf), value);
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %llu */
static void
print_num_llu(char** at, size_t* left, int* ret, unsigned long long value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = 0;
int zero = (value == 0);
int len = print_dec_ll(buf, (int)sizeof(buf), value);
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %x */
static void
print_num_x(char** at, size_t* left, int* ret, unsigned int value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = 0;
int zero = (value == 0);
int len = print_hex(buf, (int)sizeof(buf), value);
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %lx */
static void
print_num_lx(char** at, size_t* left, int* ret, unsigned long value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = 0;
int zero = (value == 0);
int len = print_hex_l(buf, (int)sizeof(buf), value);
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %llx */
static void
print_num_llx(char** at, size_t* left, int* ret, unsigned long long value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = 0;
int zero = (value == 0);
int len = print_hex_ll(buf, (int)sizeof(buf), value);
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** print %llp */
static void
print_num_llp(char** at, size_t* left, int* ret, void* value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_DEC_BUFSZ];
int negative = 0;
int zero = (value == 0);
#if defined(SIZE_MAX) && defined(UINT32_MAX) && (UINT32_MAX == SIZE_MAX || INT32_MAX == SIZE_MAX)
/* avoid warning about upcast on 32bit systems */
unsigned long long llvalue = (unsigned long)value;
#else
unsigned long long llvalue = (unsigned long long)value;
#endif
int len = print_hex_ll(buf, (int)sizeof(buf), llvalue);
if(zero) {
buf[0]=')';
buf[1]='l';
buf[2]='i';
buf[3]='n';
buf[4]='(';
len = 5;
} else {
/* put '0x' in front of the (reversed) buffer result */
if(len < PRINT_DEC_BUFSZ)
buf[len++] = 'x';
if(len < PRINT_DEC_BUFSZ)
buf[len++] = '0';
}
print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
plus, space, zero, negative, buf, len);
}
#define PRINT_FLOAT_BUFSZ 64 /* xx.yy with 20.20 about the max */
/** spool remainder after the decimal point to buffer, in reverse */
static int
print_remainder(char* buf, int max, double r, int prec)
{
unsigned long long cap = 1;
unsigned long long value;
int len, i;
if(prec > 19) prec = 19; /* max we can do */
if(max < prec) return 0;
for(i=0; i<prec; i++) {
cap *= 10;
}
r *= (double)cap;
value = (unsigned long long)r;
/* see if we need to round up */
if(((unsigned long long)((r - (double)value)*10.0)) >= 5) {
value++;
/* that might carry to numbers before the comma, if so,
* just ignore that rounding. failure because 64bitprintout */
if(value >= cap)
value = cap-1;
}
len = print_dec_ll(buf, max, value);
while(len < prec) { /* pad with zeroes, e.g. if 0.0012 */
buf[len++] = '0';
}
if(len < max)
buf[len++] = '.';
return len;
}
/** spool floating point to buffer */
static int
print_float(char* buf, int max, double value, int prec)
{
/* as xxx.xxx if prec==0, no '.', with prec decimals after . */
/* no conversion for NAN and INF, because we do not want to require
linking with -lm. */
/* Thus, the conversions use 64bit integers to convert the numbers,
* which makes 19 digits before and after the decimal point the max */
unsigned long long whole = (unsigned long long)value;
double remain = value - (double)whole;
int len = 0;
if(prec != 0)
len = print_remainder(buf, max, remain, prec);
len += print_dec_ll(buf+len, max-len, whole);
return len;
}
/** print %f */
static void
print_num_f(char** at, size_t* left, int* ret, double value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_FLOAT_BUFSZ];
int negative = (value < 0);
int zero = 0;
int len;
if(!prgiven) precision = 6;
len = print_float(buf, (int)sizeof(buf), negative?-value:value,
precision);
print_num(at, left, ret, minw, 1, 0, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/* rudimentary %g support */
static int
print_float_g(char* buf, int max, double value, int prec)
{
unsigned long long whole = (unsigned long long)value;
double remain = value - (double)whole;
int before = 0;
int len = 0;
/* number of digits before the decimal point */
while(whole > 0) {
before++;
whole /= 10;
}
whole = (unsigned long long)value;
if(prec > before && remain != 0.0) {
/* see if the last decimals are zero, if so, skip them */
len = print_remainder(buf, max, remain, prec-before);
while(len > 0 && buf[0]=='0') {
memmove(buf, buf+1, --len);
}
}
len += print_dec_ll(buf+len, max-len, whole);
return len;
}
/** print %g */
static void
print_num_g(char** at, size_t* left, int* ret, double value,
int minw, int precision, int prgiven, int zeropad, int minus,
int plus, int space)
{
char buf[PRINT_FLOAT_BUFSZ];
int negative = (value < 0);
int zero = 0;
int len;
if(!prgiven) precision = 6;
if(precision == 0) precision = 1;
len = print_float_g(buf, (int)sizeof(buf), negative?-value:value,
precision);
print_num(at, left, ret, minw, 1, 0, zeropad, minus,
plus, space, zero, negative, buf, len);
}
/** strnlen (compat implementation) */
static int
my_strnlen(const char* s, int max)
{
int i;
for(i=0; i<max; i++)
if(s[i]==0)
return i;
return max;
}
/** print %s */
static void
print_str(char** at, size_t* left, int* ret, char* s,
int minw, int precision, int prgiven, int minus)
{
int w;
/* with prec: no more than x characters from this string, stop at 0 */
if(prgiven)
w = my_strnlen(s, precision);
else w = (int)strlen(s); /* up to the nul */
if(w < minw && !minus)
print_pad(at, left, ret, ' ', minw - w);
spool_str(at, left, ret, s, w);
if(w < minw && minus)
print_pad(at, left, ret, ' ', minw - w);
}
/** print %c */
static void
print_char(char** at, size_t* left, int* ret, int c,
int minw, int minus)
{
if(1 < minw && !minus)
print_pad(at, left, ret, ' ', minw - 1);
print_pad(at, left, ret, c, 1);
if(1 < minw && minus)
print_pad(at, left, ret, ' ', minw - 1);
}
/**
* Print to string.
* str: string buffer for result. result will be null terminated.
* size: size of the buffer. null is put inside buffer.
* format: printf format string.
* arg: '...' arguments to print.
* returns number of characters. a null is printed after this.
* return number of bytes that would have been written
* if the buffer had been large enough.
*
* supported format specifiers:
* %s, %u, %d, %x, %i, %f, %g, %c, %p, %n.
* length: l, ll (for d, u, x).
* precision: 6.6d (for d, u, x)
* %f, %g precisions, 0.3f
* %20s, '.*s'
* and %%.
*/
int vsnprintf(char* str, size_t size, const char* format, va_list arg)
{
char* at = str;
size_t left = size;
int ret = 0;
const char* fmt = format;
int conv, minw, precision, prgiven, zeropad, minus, plus, space, length;
while(*fmt) {
/* copy string before % */
while(*fmt && *fmt!='%') {
if(left > 1) {
*at++ = *fmt++;
left--;
} else fmt++;
ret++;
}
/* see if we are at end */
if(!*fmt) break;
/* fetch next argument % designation from format string */
fmt++; /* skip the '%' */
/********************************/
/* get the argument designation */
/********************************/
/* we must do this vararg stuff inside this function for
* portability. Hence, get_designation, and print_designation
* are not their own functions. */
/* printout designation:
* conversion specifier: x, d, u, s, c, n, m, p
* flags: # not supported
* 0 zeropad (on the left)
* - left adjust (right by default)
* ' ' printspace for positive number (in - position).
* + alwayssign
* fieldwidth: [1-9][0-9]* minimum field width.
* if this is * then type int next argument specifies the minwidth.
* if this is negative, the - flag is set (with positive width).
* precision: period[digits]*, %.2x.
* if this is * then type int next argument specifies the precision.
* just '.' or negative value means precision=0.
* this is mindigits to print for d, i, u, x
* this is aftercomma digits for f
* this is max number significant digits for g
* maxnumber characters to be printed for s
* length: 0-none (int), 1-l (long), 2-ll (long long)
* notsupported: hh (char), h (short), L (long double), q, j, z, t
* Does not support %m$ and *m$ argument designation as array indices.
* Does not support %#x
*
*/
minw = 0;
precision = 1;
prgiven = 0;
zeropad = 0;
minus = 0;
plus = 0;
space = 0;
length = 0;
/* get flags in any order */
for(;;) {
if(*fmt == '0')
zeropad = 1;
else if(*fmt == '-')
minus = 1;
else if(*fmt == '+')
plus = 1;
else if(*fmt == ' ')
space = 1;
else break;
fmt++;
}
/* field width */
if(*fmt == '*') {
fmt++; /* skip char */
minw = va_arg(arg, int);
if(minw < 0) {
minus = 1;
minw = -minw;
}
} else while(*fmt >= '0' && *fmt <= '9') {
minw = minw*10 + (*fmt++)-'0';
}
/* precision */
if(*fmt == '.') {
fmt++; /* skip period */
prgiven = 1;
precision = 0;
if(*fmt == '*') {
fmt++; /* skip char */
precision = va_arg(arg, int);
if(precision < 0)
precision = 0;
} else while(*fmt >= '0' && *fmt <= '9') {
precision = precision*10 + (*fmt++)-'0';
}
}
/* length */
if(*fmt == 'l') {
fmt++; /* skip char */
length = 1;
if(*fmt == 'l') {
fmt++; /* skip char */
length = 2;
}
}
/* get the conversion */
if(!*fmt) conv = 0;
else conv = *fmt++;
/***********************************/
/* print that argument designation */
/***********************************/
switch(conv) {
case 'i':
case 'd':
if(length == 0)
print_num_d(&at, &left, &ret, va_arg(arg, int),
minw, precision, prgiven, zeropad, minus, plus, space);
else if(length == 1)
print_num_ld(&at, &left, &ret, va_arg(arg, long),
minw, precision, prgiven, zeropad, minus, plus, space);
else if(length == 2)
print_num_lld(&at, &left, &ret,
va_arg(arg, long long),
minw, precision, prgiven, zeropad, minus, plus, space);
break;
case 'u':
if(length == 0)
print_num_u(&at, &left, &ret,
va_arg(arg, unsigned int),
minw, precision, prgiven, zeropad, minus, plus, space);
else if(length == 1)
print_num_lu(&at, &left, &ret,
va_arg(arg, unsigned long),
minw, precision, prgiven, zeropad, minus, plus, space);
else if(length == 2)
print_num_llu(&at, &left, &ret,
va_arg(arg, unsigned long long),
minw, precision, prgiven, zeropad, minus, plus, space);
break;
case 'x':
if(length == 0)
print_num_x(&at, &left, &ret,
va_arg(arg, unsigned int),
minw, precision, prgiven, zeropad, minus, plus, space);
else if(length == 1)
print_num_lx(&at, &left, &ret,
va_arg(arg, unsigned long),
minw, precision, prgiven, zeropad, minus, plus, space);
else if(length == 2)
print_num_llx(&at, &left, &ret,
va_arg(arg, unsigned long long),
minw, precision, prgiven, zeropad, minus, plus, space);
break;
case 's':
print_str(&at, &left, &ret, va_arg(arg, char*),
minw, precision, prgiven, minus);
break;
case 'c':
print_char(&at, &left, &ret, va_arg(arg, int),
minw, minus);
break;
case 'n':
*va_arg(arg, int*) = ret;
break;
case 'm':
print_str(&at, &left, &ret, strerror(errno),
minw, precision, prgiven, minus);
break;
case 'p':
print_num_llp(&at, &left, &ret, va_arg(arg, void*),
minw, precision, prgiven, zeropad, minus, plus, space);
break;
case '%':
print_pad(&at, &left, &ret, '%', 1);
break;
case 'f':
print_num_f(&at, &left, &ret, va_arg(arg, double),
minw, precision, prgiven, zeropad, minus, plus, space);
break;
case 'g':
print_num_g(&at, &left, &ret, va_arg(arg, double),
minw, precision, prgiven, zeropad, minus, plus, space);
break;
/* unknown */
default:
case 0: break;
}
}
/* zero terminate */
if(left > 0)
*at = 0;
return ret;
}
#ifdef SNPRINTF_TEST
/** do tests */
#undef snprintf
#define DOTEST(bufsz, result, retval, ...) do { \
char buf[bufsz]; \
printf("now test %s\n", #__VA_ARGS__); \
int r=my_snprintf(buf, sizeof(buf), __VA_ARGS__); \
if(r != retval || strcmp(buf, result) != 0) { \
printf("error test(%s) was \"%s\":%d\n", \
""#bufsz", "#result", "#retval", "#__VA_ARGS__, \
buf, r); \
exit(1); \
} \
r=snprintf(buf, sizeof(buf), __VA_ARGS__); \
if(r != retval || strcmp(buf, result) != 0) { \
printf("error test(%s) differs with system, \"%s\":%d\n", \
""#bufsz", "#result", "#retval", "#__VA_ARGS__, \
buf, r); \
exit(1); \
} \
printf("test(\"%s\":%d) passed\n", buf, r); \
} while(0);
/** test program */
int main(void)
{
int x = 0;
/* bufsize, expectedstring, expectedretval, snprintf arguments */
DOTEST(1024, "hello", 5, "hello");
DOTEST(1024, "h", 1, "h");
/* warning from gcc for format string, but it does work
* DOTEST(1024, "", 0, ""); */
DOTEST(3, "he", 5, "hello");
DOTEST(1, "", 7, "%d", 7823089);
/* test positive numbers */
DOTEST(1024, "0", 1, "%d", 0);
DOTEST(1024, "1", 1, "%d", 1);
DOTEST(1024, "9", 1, "%d", 9);
DOTEST(1024, "15", 2, "%d", 15);
DOTEST(1024, "ab15cd", 6, "ab%dcd", 15);
DOTEST(1024, "167", 3, "%d", 167);
DOTEST(1024, "7823089", 7, "%d", 7823089);
DOTEST(1024, " 12", 3, "%3d", 12);
DOTEST(1024, "012", 3, "%.3d", 12);
DOTEST(1024, "012", 3, "%3.3d", 12);
DOTEST(1024, "012", 3, "%03d", 12);
DOTEST(1024, " 012", 4, "%4.3d", 12);
DOTEST(1024, "", 0, "%.0d", 0);
/* test negative numbers */
DOTEST(1024, "-1", 2, "%d", -1);
DOTEST(1024, "-12", 3, "%3d", -12);
DOTEST(1024, " -2", 3, "%3d", -2);
DOTEST(1024, "-012", 4, "%.3d", -12);
DOTEST(1024, "-012", 4, "%3.3d", -12);
DOTEST(1024, "-012", 4, "%4.3d", -12);
DOTEST(1024, " -012", 5, "%5.3d", -12);
DOTEST(1024, "-12", 3, "%03d", -12);
DOTEST(1024, "-02", 3, "%03d", -2);
DOTEST(1024, "-15", 3, "%d", -15);
DOTEST(1024, "-7307", 5, "%d", -7307);
DOTEST(1024, "-12 ", 5, "%-5d", -12);
DOTEST(1024, "-00012", 6, "%-.5d", -12);
/* test + and space flags */
DOTEST(1024, "+12", 3, "%+d", 12);
DOTEST(1024, " 12", 3, "% d", 12);
/* test %u */
DOTEST(1024, "12", 2, "%u", 12);
DOTEST(1024, "0", 1, "%u", 0);
DOTEST(1024, "4294967295", 10, "%u", 0xffffffff);
/* test %x */
DOTEST(1024, "0", 1, "%x", 0);
DOTEST(1024, "c", 1, "%x", 12);
DOTEST(1024, "12ab34cd", 8, "%x", 0x12ab34cd);
/* test %llu, %lld */
DOTEST(1024, "18446744073709551615", 20, "%llu",
(long long)0xffffffffffffffff);
DOTEST(1024, "-9223372036854775808", 20, "%lld",
(long long)0x8000000000000000);
DOTEST(1024, "9223372036854775808", 19, "%llu",
(long long)0x8000000000000000);
/* test %s */
DOTEST(1024, "hello", 5, "%s", "hello");
DOTEST(1024, " hello", 10, "%10s", "hello");
DOTEST(1024, "hello ", 10, "%-10s", "hello");
DOTEST(1024, "he", 2, "%.2s", "hello");
DOTEST(1024, " he", 4, "%4.2s", "hello");
DOTEST(1024, " h", 4, "%4.2s", "h");
/* test %c */
DOTEST(1024, "a", 1, "%c", 'a');
/* warning from gcc for format string, but it does work
DOTEST(1024, " a", 5, "%5c", 'a');
DOTEST(1024, "a", 1, "%.0c", 'a'); */
/* test %n */
DOTEST(1024, "hello", 5, "hello%n", &x);
if(x != 5) { printf("the %%n failed\n"); exit(1); }
/* test %m */
errno = 0;
DOTEST(1024, "Success", 7, "%m");
/* test %p */
DOTEST(1024, "0x10", 4, "%p", (void*)0x10);
DOTEST(1024, "(nil)", 5, "%p", (void*)0x0);
/* test %% */
DOTEST(1024, "%", 1, "%%");
/* test %f */
DOTEST(1024, "0.000000", 8, "%f", 0.0);
DOTEST(1024, "0.00", 4, "%.2f", 0.0);
/* differs, "-0.00" DOTEST(1024, "0.00", 4, "%.2f", -0.0); */
DOTEST(1024, "234.00", 6, "%.2f", 234.005);
DOTEST(1024, "8973497.1246", 12, "%.4f", 8973497.12456);
DOTEST(1024, "-12.000000", 10, "%f", -12.0);
DOTEST(1024, "6", 1, "%.0f", 6.0);
DOTEST(1024, "6", 1, "%g", 6.0);
DOTEST(1024, "6.1", 3, "%g", 6.1);
DOTEST(1024, "6.15", 4, "%g", 6.15);
/* These format strings are from the code of NSD, Unbound, ldns */
DOTEST(1024, "abcdef", 6, "%s", "abcdef");
DOTEST(1024, "005", 3, "%03u", 5);
DOTEST(1024, "12345", 5, "%03u", 12345);
DOTEST(1024, "5", 1, "%d", 5);
DOTEST(1024, "(nil)", 5, "%p", NULL);
DOTEST(1024, "12345", 5, "%ld", (long)12345);
DOTEST(1024, "12345", 5, "%lu", (long)12345);
DOTEST(1024, " 12345", 12, "%12u", (unsigned)12345);
DOTEST(1024, "12345", 5, "%u", (unsigned)12345);
DOTEST(1024, "12345", 5, "%llu", (unsigned long long)12345);
DOTEST(1024, "12345", 5, "%x", 0x12345);
DOTEST(1024, "12345", 5, "%llx", (long long)0x12345);
DOTEST(1024, "012345", 6, "%6.6d", 12345);
DOTEST(1024, "012345", 6, "%6.6u", 12345);
DOTEST(1024, "1234.54", 7, "%g", 1234.54);
DOTEST(1024, "123456789.54", 12, "%.12g", 123456789.54);
DOTEST(1024, "3456789123456.54", 16, "%.16g", 3456789123456.54);
/* %24g does not work with 24 digits, not enough accuracy,
* the first 16 digits are correct */
DOTEST(1024, "12345", 5, "%3.3d", 12345);
DOTEST(1024, "000", 3, "%3.3d", 0);
DOTEST(1024, "001", 3, "%3.3d", 1);
DOTEST(1024, "012", 3, "%3.3d", 12);
DOTEST(1024, "-012", 4, "%3.3d", -12);
DOTEST(1024, "he", 2, "%.2s", "hello");
DOTEST(1024, "helloworld", 10, "%s%s", "hello", "world");
DOTEST(1024, "he", 2, "%.*s", 2, "hello");
DOTEST(1024, " hello", 7, "%*s", 7, "hello");
DOTEST(1024, "hello ", 7, "%*s", -7, "hello");
DOTEST(1024, "0", 1, "%c", '0');
DOTEST(1024, "A", 1, "%c", 'A');
DOTEST(1024, "", 1, "%c", 0);
DOTEST(1024, "\010", 1, "%c", 8);
DOTEST(1024, "%", 1, "%%");
DOTEST(1024, "0a", 2, "%02x", 0x0a);
DOTEST(1024, "bd", 2, "%02x", 0xbd);
DOTEST(1024, "12", 2, "%02ld", (long)12);
DOTEST(1024, "02", 2, "%02ld", (long)2);
DOTEST(1024, "02", 2, "%02u", (unsigned)2);
DOTEST(1024, "765432", 6, "%05u", (unsigned)765432);
DOTEST(1024, "10.234", 6, "%0.3f", 10.23421);
DOTEST(1024, "123456.234", 10, "%0.3f", 123456.23421);
DOTEST(1024, "123456789.234", 13, "%0.3f", 123456789.23421);
DOTEST(1024, "123456.23", 9, "%.2f", 123456.23421);
DOTEST(1024, "123456", 6, "%.0f", 123456.23421);
DOTEST(1024, "0123", 4, "%.4x", 0x0123);
DOTEST(1024, "00000123", 8, "%.8x", 0x0123);
DOTEST(1024, "ffeb0cde", 8, "%.8x", 0xffeb0cde);
DOTEST(1024, " 987654321", 10, "%10lu", (unsigned long)987654321);
DOTEST(1024, " 987654321", 12, "%12lu", (unsigned long)987654321);
DOTEST(1024, "987654321", 9, "%i", 987654321);
DOTEST(1024, "-87654321", 9, "%i", -87654321);
DOTEST(1024, "hello ", 16, "%-16s", "hello");
DOTEST(1024, " ", 16, "%-16s", "");
DOTEST(1024, "a ", 16, "%-16s", "a");
DOTEST(1024, "foobarfoobar ", 16, "%-16s", "foobarfoobar");
DOTEST(1024, "foobarfoobarfoobar", 18, "%-16s", "foobarfoobarfoobar");
/* combined expressions */
DOTEST(1024, "foo 1.0 size 512 edns", 21,
"foo %s size %d %s%s", "1.0", 512, "", "edns");
DOTEST(15, "foo 1.0 size 5", 21,
"foo %s size %d %s%s", "1.0", 512, "", "edns");
DOTEST(1024, "packet 1203ceff id", 18,
"packet %2.2x%2.2x%2.2x%2.2x id", 0x12, 0x03, 0xce, 0xff);
DOTEST(1024, "/tmp/testbound_123abcd.tmp", 26, "/tmp/testbound_%u%s%s.tmp", 123, "ab", "cd");
return 0;
}
#endif /* SNPRINTF_TEST */
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