935 lines
26 KiB
C
935 lines
26 KiB
C
/*
|
|
** The "printf" code that follows dates from the 1980's. It is in
|
|
** the public domain. The original comments are included here for
|
|
** completeness. They are very out-of-date but might be useful as
|
|
** an historical reference. Most of the "enhancements" have been backed
|
|
** out so that the functionality is now the same as standard printf().
|
|
**
|
|
**************************************************************************
|
|
**
|
|
** The following modules is an enhanced replacement for the "printf" subroutines
|
|
** found in the standard C library. The following enhancements are
|
|
** supported:
|
|
**
|
|
** + Additional functions. The standard set of "printf" functions
|
|
** includes printf, fprintf, sprintf, vprintf, vfprintf, and
|
|
** vsprintf. This module adds the following:
|
|
**
|
|
** * snprintf -- Works like sprintf, but has an extra argument
|
|
** which is the size of the buffer written to.
|
|
**
|
|
** * mprintf -- Similar to sprintf. Writes output to memory
|
|
** obtained from malloc.
|
|
**
|
|
** * xprintf -- Calls a function to dispose of output.
|
|
**
|
|
** * nprintf -- No output, but returns the number of characters
|
|
** that would have been output by printf.
|
|
**
|
|
** * A v- version (ex: vsnprintf) of every function is also
|
|
** supplied.
|
|
**
|
|
** + A few extensions to the formatting notation are supported:
|
|
**
|
|
** * The "=" flag (similar to "-") causes the output to be
|
|
** be centered in the appropriately sized field.
|
|
**
|
|
** * The %b field outputs an integer in binary notation.
|
|
**
|
|
** * The %c field now accepts a precision. The character output
|
|
** is repeated by the number of times the precision specifies.
|
|
**
|
|
** * The %' field works like %c, but takes as its character the
|
|
** next character of the format string, instead of the next
|
|
** argument. For example, printf("%.78'-") prints 78 minus
|
|
** signs, the same as printf("%.78c",'-').
|
|
**
|
|
** + When compiled using GCC on a SPARC, this version of printf is
|
|
** faster than the library printf for SUN OS 4.1.
|
|
**
|
|
** + All functions are fully reentrant.
|
|
**
|
|
*/
|
|
/*
|
|
* 20090210 (stkn):
|
|
* Taken from sqlite-3.3.x,
|
|
* renamed SQLITE_ -> SWITCH_,
|
|
* renamed visible functions to switch_*
|
|
* disabled functions without extra conversion specifiers
|
|
*/
|
|
|
|
#include <switch.h>
|
|
|
|
#define LONGDOUBLE_TYPE long double
|
|
|
|
/*
|
|
** Conversion types fall into various categories as defined by the
|
|
** following enumeration.
|
|
*/
|
|
#define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */
|
|
#define etFLOAT 2 /* Floating point. %f */
|
|
#define etEXP 3 /* Exponentional notation. %e and %E */
|
|
#define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */
|
|
#define etSIZE 5 /* Return number of characters processed so far. %n */
|
|
#define etSTRING 6 /* Strings. %s */
|
|
#define etDYNSTRING 7 /* Dynamically allocated strings. %z */
|
|
#define etPERCENT 8 /* Percent symbol. %% */
|
|
#define etCHARX 9 /* Characters. %c */
|
|
/* The rest are extensions, not normally found in printf() */
|
|
#define etCHARLIT 10 /* Literal characters. %' */
|
|
#define etSQLESCAPE 11 /* Strings with '\'' doubled. %q */
|
|
#define etSQLESCAPE2 12 /* Strings with '\'' doubled and enclosed in '',
|
|
NULL pointers replaced by SQL NULL. %Q */
|
|
#ifdef __UNSUPPORTED__
|
|
#define etTOKEN 13 /* a pointer to a Token structure */
|
|
#define etSRCLIST 14 /* a pointer to a SrcList */
|
|
#endif
|
|
#define etPOINTER 15 /* The %p conversion */
|
|
#define etSQLESCAPE3 16
|
|
#define etSQLESCAPE4 17
|
|
|
|
/*
|
|
** An "etByte" is an 8-bit unsigned value.
|
|
*/
|
|
typedef unsigned char etByte;
|
|
|
|
/*
|
|
** Each builtin conversion character (ex: the 'd' in "%d") is described
|
|
** by an instance of the following structure
|
|
*/
|
|
typedef struct et_info { /* Information about each format field */
|
|
char fmttype; /* The format field code letter */
|
|
etByte base; /* The base for radix conversion */
|
|
etByte flags; /* One or more of FLAG_ constants below */
|
|
etByte type; /* Conversion paradigm */
|
|
etByte charset; /* Offset into aDigits[] of the digits string */
|
|
etByte prefix; /* Offset into aPrefix[] of the prefix string */
|
|
} et_info;
|
|
|
|
/*
|
|
** Allowed values for et_info.flags
|
|
*/
|
|
#define FLAG_SIGNED 1 /* True if the value to convert is signed */
|
|
#define FLAG_INTERN 2 /* True if for internal use only */
|
|
#define FLAG_STRING 4 /* Allow infinity precision */
|
|
|
|
|
|
/*
|
|
** The following table is searched linearly, so it is good to put the
|
|
** most frequently used conversion types first.
|
|
*/
|
|
static const char aDigits[] = "0123456789ABCDEF0123456789abcdef";
|
|
static const char aPrefix[] = "-x0\000X0";
|
|
static const et_info fmtinfo[] = {
|
|
{'d', 10, 1, etRADIX, 0, 0},
|
|
{'s', 0, 4, etSTRING, 0, 0},
|
|
{'g', 0, 1, etGENERIC, 30, 0},
|
|
{'z', 0, 6, etDYNSTRING, 0, 0},
|
|
{'q', 0, 4, etSQLESCAPE, 0, 0},
|
|
{'Q', 0, 4, etSQLESCAPE2, 0, 0},
|
|
{'w', 0, 4, etSQLESCAPE3, 0, 0},
|
|
{'y', 0, 4, etSQLESCAPE4, 0, 0},
|
|
{'c', 0, 0, etCHARX, 0, 0},
|
|
{'o', 8, 0, etRADIX, 0, 2},
|
|
{'u', 10, 0, etRADIX, 0, 0},
|
|
{'x', 16, 0, etRADIX, 16, 1},
|
|
{'X', 16, 0, etRADIX, 0, 4},
|
|
#ifndef SWITCH_OMIT_FLOATING_POINT
|
|
{'f', 0, 1, etFLOAT, 0, 0},
|
|
{'e', 0, 1, etEXP, 30, 0},
|
|
{'E', 0, 1, etEXP, 14, 0},
|
|
{'G', 0, 1, etGENERIC, 14, 0},
|
|
#endif
|
|
{'i', 10, 1, etRADIX, 0, 0},
|
|
{'n', 0, 0, etSIZE, 0, 0},
|
|
{'%', 0, 0, etPERCENT, 0, 0},
|
|
{'p', 16, 0, etPOINTER, 0, 1},
|
|
#ifdef __UNSUPPORTED__
|
|
{'T', 0, 2, etTOKEN, 0, 0},
|
|
{'S', 0, 2, etSRCLIST, 0, 0},
|
|
#endif
|
|
};
|
|
|
|
#define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0]))
|
|
|
|
/*
|
|
** If SWITCH_OMIT_FLOATING_POINT is defined, then none of the floating point
|
|
** conversions will work.
|
|
*/
|
|
#ifndef SWITCH_OMIT_FLOATING_POINT
|
|
/*
|
|
** "*val" is a double such that 0.1 <= *val < 10.0
|
|
** Return the ascii code for the leading digit of *val, then
|
|
** multiply "*val" by 10.0 to renormalize.
|
|
**
|
|
** Example:
|
|
** input: *val = 3.14159
|
|
** output: *val = 1.4159 function return = '3'
|
|
**
|
|
** The counter *cnt is incremented each time. After counter exceeds
|
|
** 16 (the number of significant digits in a 64-bit float) '0' is
|
|
** always returned.
|
|
*/
|
|
static int et_getdigit(LONGDOUBLE_TYPE * val, int *cnt)
|
|
{
|
|
int digit;
|
|
LONGDOUBLE_TYPE d;
|
|
if ((*cnt)++ >= 16)
|
|
return '0';
|
|
digit = (int) *val;
|
|
d = digit;
|
|
digit += '0';
|
|
*val = (*val - d) * 10.0;
|
|
return digit;
|
|
}
|
|
#endif /* SWITCH_OMIT_FLOATING_POINT */
|
|
|
|
/*
|
|
** On machines with a small stack size, you can redefine the
|
|
** SWITCH_PRINT_BUF_SIZE to be less than 350. But beware - for
|
|
** smaller values some %f conversions may go into an infinite loop.
|
|
*/
|
|
#ifndef SWITCH_PRINT_BUF_SIZE
|
|
# define SWITCH_PRINT_BUF_SIZE 350
|
|
#endif
|
|
#define etBUFSIZE SWITCH_PRINT_BUF_SIZE /* Size of the output buffer */
|
|
|
|
/*
|
|
** The root program. All variations call this core.
|
|
**
|
|
** INPUTS:
|
|
** func This is a pointer to a function taking three arguments
|
|
** 1. A pointer to anything. Same as the "arg" parameter.
|
|
** 2. A pointer to the list of characters to be output
|
|
** (Note, this list is NOT null terminated.)
|
|
** 3. An integer number of characters to be output.
|
|
** (Note: This number might be zero.)
|
|
**
|
|
** arg This is the pointer to anything which will be passed as the
|
|
** first argument to "func". Use it for whatever you like.
|
|
**
|
|
** fmt This is the format string, as in the usual print.
|
|
**
|
|
** ap This is a pointer to a list of arguments. Same as in
|
|
** vfprint.
|
|
**
|
|
** OUTPUTS:
|
|
** The return value is the total number of characters sent to
|
|
** the function "func". Returns -1 on a error.
|
|
**
|
|
** Note that the order in which automatic variables are declared below
|
|
** seems to make a big difference in determining how fast this beast
|
|
** will run.
|
|
*/
|
|
static int vxprintf(void (*func) (void *, const char *, int), /* Consumer of text */
|
|
void *arg, /* First argument to the consumer */
|
|
int useExtended, /* Allow extended %-conversions */
|
|
const char *fmt, /* Format string */
|
|
va_list ap /* arguments */
|
|
)
|
|
{
|
|
int c; /* Next character in the format string */
|
|
char *bufpt; /* Pointer to the conversion buffer */
|
|
int precision; /* Precision of the current field */
|
|
int length; /* Length of the field */
|
|
int idx; /* A general purpose loop counter */
|
|
int count; /* Total number of characters output */
|
|
int width; /* Width of the current field */
|
|
etByte flag_leftjustify; /* True if "-" flag is present */
|
|
etByte flag_plussign; /* True if "+" flag is present */
|
|
etByte flag_blanksign; /* True if " " flag is present */
|
|
etByte flag_alternateform; /* True if "#" flag is present */
|
|
etByte flag_altform2; /* True if "!" flag is present */
|
|
etByte flag_zeropad; /* True if field width constant starts with zero */
|
|
etByte flag_long; /* True if "l" flag is present */
|
|
etByte flag_longlong; /* True if the "ll" flag is present */
|
|
etByte done; /* Loop termination flag */
|
|
uint64_t longvalue; /* Value for integer types */
|
|
LONGDOUBLE_TYPE realvalue; /* Value for real types */
|
|
const et_info *infop; /* Pointer to the appropriate info structure */
|
|
char buf[etBUFSIZE]; /* Conversion buffer */
|
|
char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */
|
|
etByte errorflag = 0; /* True if an error is encountered */
|
|
etByte xtype = 0; /* Conversion paradigm */
|
|
char *zExtra; /* Extra memory used for etTCLESCAPE conversions */
|
|
static const char spaces[] = " ";
|
|
#define etSPACESIZE (sizeof(spaces)-1)
|
|
#ifndef SWITCH_OMIT_FLOATING_POINT
|
|
int exp, e2; /* exponent of real numbers */
|
|
double rounder; /* Used for rounding floating point values */
|
|
etByte flag_dp; /* True if decimal point should be shown */
|
|
etByte flag_rtz; /* True if trailing zeros should be removed */
|
|
etByte flag_exp; /* True to force display of the exponent */
|
|
int nsd; /* Number of significant digits returned */
|
|
#endif
|
|
|
|
func(arg, "", 0);
|
|
count = length = 0;
|
|
bufpt = 0;
|
|
for (; (c = (*fmt)) != 0; ++fmt) {
|
|
if (c != '%') {
|
|
int amt;
|
|
bufpt = (char *) fmt;
|
|
amt = 1;
|
|
while ((c = (*++fmt)) != '%' && c != 0)
|
|
amt++;
|
|
(*func) (arg, bufpt, amt);
|
|
count += amt;
|
|
if (c == 0)
|
|
break;
|
|
}
|
|
if ((c = (*++fmt)) == 0) {
|
|
errorflag = 1;
|
|
(*func) (arg, "%", 1);
|
|
count++;
|
|
break;
|
|
}
|
|
/* Find out what flags are present */
|
|
flag_leftjustify = flag_plussign = flag_blanksign = flag_alternateform = flag_altform2 = flag_zeropad = 0;
|
|
done = 0;
|
|
do {
|
|
switch (c) {
|
|
case '-':
|
|
flag_leftjustify = 1;
|
|
break;
|
|
case '+':
|
|
flag_plussign = 1;
|
|
break;
|
|
case ' ':
|
|
flag_blanksign = 1;
|
|
break;
|
|
case '#':
|
|
flag_alternateform = 1;
|
|
break;
|
|
case '!':
|
|
flag_altform2 = 1;
|
|
break;
|
|
case '0':
|
|
flag_zeropad = 1;
|
|
break;
|
|
default:
|
|
done = 1;
|
|
break;
|
|
}
|
|
} while (!done && (c = (*++fmt)) != 0);
|
|
/* Get the field width */
|
|
width = 0;
|
|
if (c == '*') {
|
|
width = va_arg(ap, int);
|
|
if (width < 0) {
|
|
flag_leftjustify = 1;
|
|
width = -width;
|
|
}
|
|
c = *++fmt;
|
|
} else {
|
|
while (c >= '0' && c <= '9') {
|
|
width = width * 10 + c - '0';
|
|
c = *++fmt;
|
|
}
|
|
}
|
|
if (width > etBUFSIZE - 10) {
|
|
width = etBUFSIZE - 10;
|
|
}
|
|
/* Get the precision */
|
|
if (c == '.') {
|
|
precision = 0;
|
|
c = *++fmt;
|
|
if (c == '*') {
|
|
precision = va_arg(ap, int);
|
|
if (precision < 0)
|
|
precision = -precision;
|
|
c = *++fmt;
|
|
} else {
|
|
while (c >= '0' && c <= '9') {
|
|
precision = precision * 10 + c - '0';
|
|
c = *++fmt;
|
|
}
|
|
}
|
|
} else {
|
|
precision = -1;
|
|
}
|
|
/* Get the conversion type modifier */
|
|
if (c == 'l') {
|
|
flag_long = 1;
|
|
c = *++fmt;
|
|
if (c == 'l') {
|
|
flag_longlong = 1;
|
|
c = *++fmt;
|
|
} else {
|
|
flag_longlong = 0;
|
|
}
|
|
} else {
|
|
flag_long = flag_longlong = 0;
|
|
}
|
|
/* Fetch the info entry for the field */
|
|
infop = 0;
|
|
for (idx = 0; idx < etNINFO; idx++) {
|
|
if (c == fmtinfo[idx].fmttype) {
|
|
infop = &fmtinfo[idx];
|
|
if (useExtended || (infop->flags & FLAG_INTERN) == 0) {
|
|
xtype = infop->type;
|
|
} else {
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
zExtra = 0;
|
|
if (infop == 0) {
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* Limit the precision to prevent overflowing buf[] during conversion */
|
|
if (precision > etBUFSIZE - 40 && (infop->flags & FLAG_STRING) == 0) {
|
|
precision = etBUFSIZE - 40;
|
|
}
|
|
|
|
/*
|
|
** At this point, variables are initialized as follows:
|
|
**
|
|
** flag_alternateform TRUE if a '#' is present.
|
|
** flag_altform2 TRUE if a '!' is present.
|
|
** flag_plussign TRUE if a '+' is present.
|
|
** flag_leftjustify TRUE if a '-' is present or if the
|
|
** field width was negative.
|
|
** flag_zeropad TRUE if the width began with 0.
|
|
** flag_long TRUE if the letter 'l' (ell) prefixed
|
|
** the conversion character.
|
|
** flag_longlong TRUE if the letter 'll' (ell ell) prefixed
|
|
** the conversion character.
|
|
** flag_blanksign TRUE if a ' ' is present.
|
|
** width The specified field width. This is
|
|
** always non-negative. Zero is the default.
|
|
** precision The specified precision. The default
|
|
** is -1.
|
|
** xtype The class of the conversion.
|
|
** infop Pointer to the appropriate info struct.
|
|
*/
|
|
switch (xtype) {
|
|
case etPOINTER:
|
|
flag_longlong = sizeof(char *) == sizeof(int64_t);
|
|
flag_long = sizeof(char *) == sizeof(long int);
|
|
/* Fall through into the next case */
|
|
case etRADIX:
|
|
if (infop->flags & FLAG_SIGNED) {
|
|
int64_t v;
|
|
if (flag_longlong)
|
|
v = va_arg(ap, int64_t);
|
|
else if (flag_long)
|
|
v = va_arg(ap, long int);
|
|
else
|
|
v = va_arg(ap, int);
|
|
if (v < 0) {
|
|
longvalue = -v;
|
|
prefix = '-';
|
|
} else {
|
|
longvalue = v;
|
|
if (flag_plussign)
|
|
prefix = '+';
|
|
else if (flag_blanksign)
|
|
prefix = ' ';
|
|
else
|
|
prefix = 0;
|
|
}
|
|
} else {
|
|
if (flag_longlong)
|
|
longvalue = va_arg(ap, uint64_t);
|
|
else if (flag_long)
|
|
longvalue = va_arg(ap, unsigned long int);
|
|
else
|
|
longvalue = va_arg(ap, unsigned int);
|
|
prefix = 0;
|
|
}
|
|
if (longvalue == 0)
|
|
flag_alternateform = 0;
|
|
if (flag_zeropad && precision < width - (prefix != 0)) {
|
|
precision = width - (prefix != 0);
|
|
}
|
|
bufpt = &buf[etBUFSIZE - 1];
|
|
{
|
|
register const char *cset; /* Use registers for speed */
|
|
register int base;
|
|
cset = &aDigits[infop->charset];
|
|
base = infop->base;
|
|
do { /* Convert to ascii */
|
|
*(--bufpt) = cset[longvalue % base];
|
|
longvalue = longvalue / base;
|
|
} while (longvalue > 0);
|
|
}
|
|
length = (int)(&buf[etBUFSIZE - 1] - bufpt);
|
|
for (idx = precision - length; idx > 0; idx--) {
|
|
*(--bufpt) = '0'; /* Zero pad */
|
|
}
|
|
if (prefix)
|
|
*(--bufpt) = prefix; /* Add sign */
|
|
if (flag_alternateform && infop->prefix) { /* Add "0" or "0x" */
|
|
const char *pre;
|
|
char x;
|
|
pre = &aPrefix[infop->prefix];
|
|
if (*bufpt != pre[0]) {
|
|
for (; (x = (*pre)) != 0; pre++)
|
|
*(--bufpt) = x;
|
|
}
|
|
}
|
|
length = (int)(&buf[etBUFSIZE - 1] - bufpt);
|
|
break;
|
|
case etFLOAT:
|
|
case etEXP:
|
|
case etGENERIC:
|
|
realvalue = va_arg(ap, double);
|
|
#ifndef SWITCH_OMIT_FLOATING_POINT
|
|
if (precision < 0)
|
|
precision = 6; /* Set default precision */
|
|
if (precision > etBUFSIZE / 2 - 10)
|
|
precision = etBUFSIZE / 2 - 10;
|
|
if (realvalue < 0.0) {
|
|
realvalue = -realvalue;
|
|
prefix = '-';
|
|
} else {
|
|
if (flag_plussign)
|
|
prefix = '+';
|
|
else if (flag_blanksign)
|
|
prefix = ' ';
|
|
else
|
|
prefix = 0;
|
|
}
|
|
if (xtype == etGENERIC && precision > 0)
|
|
precision--;
|
|
#if 0
|
|
/* Rounding works like BSD when the constant 0.4999 is used. Wierd! */
|
|
for (idx = precision, rounder = 0.4999; idx > 0; idx--, rounder *= 0.1);
|
|
#else
|
|
/* It makes more sense to use 0.5 */
|
|
for (idx = precision, rounder = 0.5; idx > 0; idx--, rounder *= 0.1) {
|
|
}
|
|
#endif
|
|
if (xtype == etFLOAT)
|
|
realvalue += rounder;
|
|
/* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
|
|
exp = 0;
|
|
if (realvalue > 0.0) {
|
|
while (realvalue >= 1e32 && exp <= 350) {
|
|
realvalue *= 1e-32;
|
|
exp += 32;
|
|
}
|
|
while (realvalue >= 1e8 && exp <= 350) {
|
|
realvalue *= 1e-8;
|
|
exp += 8;
|
|
}
|
|
while (realvalue >= 10.0 && exp <= 350) {
|
|
realvalue *= 0.1;
|
|
exp++;
|
|
}
|
|
while (realvalue < 1e-8 && exp >= -350) {
|
|
realvalue *= 1e8;
|
|
exp -= 8;
|
|
}
|
|
while (realvalue < 1.0 && exp >= -350) {
|
|
realvalue *= 10.0;
|
|
exp--;
|
|
}
|
|
if (exp > 350 || exp < -350) {
|
|
bufpt = "NaN";
|
|
length = 3;
|
|
break;
|
|
}
|
|
}
|
|
bufpt = buf;
|
|
/*
|
|
** If the field type is etGENERIC, then convert to either etEXP
|
|
** or etFLOAT, as appropriate.
|
|
*/
|
|
flag_exp = xtype == etEXP;
|
|
if (xtype != etFLOAT) {
|
|
realvalue += rounder;
|
|
if (realvalue >= 10.0) {
|
|
realvalue *= 0.1;
|
|
exp++;
|
|
}
|
|
}
|
|
if (xtype == etGENERIC) {
|
|
flag_rtz = !flag_alternateform;
|
|
if (exp < -4 || exp > precision) {
|
|
xtype = etEXP;
|
|
} else {
|
|
precision = precision - exp;
|
|
xtype = etFLOAT;
|
|
}
|
|
} else {
|
|
flag_rtz = 0;
|
|
}
|
|
if (xtype == etEXP) {
|
|
e2 = 0;
|
|
} else {
|
|
e2 = exp;
|
|
}
|
|
nsd = 0;
|
|
flag_dp = (precision > 0) | flag_alternateform | flag_altform2;
|
|
/* The sign in front of the number */
|
|
if (prefix) {
|
|
*(bufpt++) = prefix;
|
|
}
|
|
/* Digits prior to the decimal point */
|
|
if (e2 < 0) {
|
|
*(bufpt++) = '0';
|
|
} else {
|
|
for (; e2 >= 0; e2--) {
|
|
*(bufpt++) = (char) et_getdigit(&realvalue, &nsd);
|
|
}
|
|
}
|
|
/* The decimal point */
|
|
if (flag_dp) {
|
|
*(bufpt++) = '.';
|
|
}
|
|
/* "0" digits after the decimal point but before the first
|
|
** significant digit of the number */
|
|
for (e2++; e2 < 0 && precision > 0; precision--, e2++) {
|
|
*(bufpt++) = '0';
|
|
}
|
|
/* Significant digits after the decimal point */
|
|
while ((precision--) > 0) {
|
|
*(bufpt++) = (char) et_getdigit(&realvalue, &nsd);
|
|
}
|
|
/* Remove trailing zeros and the "." if no digits follow the "." */
|
|
if (flag_rtz && flag_dp) {
|
|
while (bufpt[-1] == '0')
|
|
*(--bufpt) = 0;
|
|
assert(bufpt > buf);
|
|
if (bufpt[-1] == '.') {
|
|
if (flag_altform2) {
|
|
*(bufpt++) = '0';
|
|
} else {
|
|
*(--bufpt) = 0;
|
|
}
|
|
}
|
|
}
|
|
/* Add the "eNNN" suffix */
|
|
if (flag_exp || (xtype == etEXP && exp)) {
|
|
*(bufpt++) = aDigits[infop->charset];
|
|
if (exp < 0) {
|
|
*(bufpt++) = '-';
|
|
exp = -exp;
|
|
} else {
|
|
*(bufpt++) = '+';
|
|
}
|
|
if (exp >= 100) {
|
|
*(bufpt++) = (char) (exp / 100) + '0'; /* 100's digit */
|
|
exp %= 100;
|
|
}
|
|
*(bufpt++) = (char) exp / 10 + '0'; /* 10's digit */
|
|
*(bufpt++) = exp % 10 + '0'; /* 1's digit */
|
|
}
|
|
*bufpt = 0;
|
|
|
|
/* The converted number is in buf[] and zero terminated. Output it.
|
|
** Note that the number is in the usual order, not reversed as with
|
|
** integer conversions. */
|
|
length = (int)(bufpt - buf);
|
|
bufpt = buf;
|
|
|
|
/* Special case: Add leading zeros if the flag_zeropad flag is
|
|
** set and we are not left justified */
|
|
if (flag_zeropad && !flag_leftjustify && length < width) {
|
|
int i;
|
|
int nPad = width - length;
|
|
for (i = width; i >= nPad; i--) {
|
|
bufpt[i] = bufpt[i - nPad];
|
|
}
|
|
i = prefix != 0;
|
|
while (nPad--)
|
|
bufpt[i++] = '0';
|
|
length = width;
|
|
}
|
|
#endif
|
|
break;
|
|
case etSIZE:
|
|
*(va_arg(ap, int *)) = count;
|
|
length = width = 0;
|
|
break;
|
|
case etPERCENT:
|
|
buf[0] = '%';
|
|
bufpt = buf;
|
|
length = 1;
|
|
break;
|
|
case etCHARLIT:
|
|
case etCHARX:
|
|
c = buf[0] = (char) (xtype == etCHARX ? va_arg(ap, int) : *++fmt);
|
|
if (precision >= 0) {
|
|
for (idx = 1; idx < precision; idx++)
|
|
buf[idx] = (char) c;
|
|
length = precision;
|
|
} else {
|
|
length = 1;
|
|
}
|
|
bufpt = buf;
|
|
break;
|
|
case etSTRING:
|
|
case etDYNSTRING:
|
|
bufpt = va_arg(ap, char *);
|
|
if (bufpt == 0) {
|
|
bufpt = "";
|
|
} else if (xtype == etDYNSTRING) {
|
|
zExtra = bufpt;
|
|
}
|
|
length = (int)strlen(bufpt);
|
|
if (precision >= 0 && precision < length)
|
|
length = precision;
|
|
break;
|
|
case etSQLESCAPE:
|
|
case etSQLESCAPE2:
|
|
case etSQLESCAPE4:
|
|
case etSQLESCAPE3:{
|
|
size_t i, j, n, ch;
|
|
int needQuote, isnull;
|
|
char *escarg = va_arg(ap, char *);
|
|
isnull = escarg == 0;
|
|
if (isnull)
|
|
escarg = (xtype == etSQLESCAPE2 ? "NULL" : "(NULL)");
|
|
for (i = n = 0; (ch = escarg[i]) != 0; i++) {
|
|
if (ch == '\'' || (xtype == etSQLESCAPE3 && ch == '\\'))
|
|
n++;
|
|
}
|
|
needQuote = !isnull && xtype == etSQLESCAPE2;
|
|
n += i + 1 + needQuote * 2;
|
|
if (n > etBUFSIZE) {
|
|
bufpt = zExtra = malloc(n);
|
|
if (bufpt == 0)
|
|
return -1;
|
|
} else {
|
|
bufpt = buf;
|
|
}
|
|
j = 0;
|
|
if (needQuote)
|
|
bufpt[j++] = '\'';
|
|
for (i = 0; (ch = escarg[i]) != 0; i++) {
|
|
bufpt[j++] = (char) ch;
|
|
if (xtype == etSQLESCAPE4) {
|
|
if (ch == '\'' || (xtype == etSQLESCAPE3 && ch == '\\')) {
|
|
bufpt[j] = (char) ch;
|
|
bufpt[j-1] = (char) '\\';
|
|
j++;
|
|
}
|
|
} else {
|
|
if (ch == '\'' || (xtype == etSQLESCAPE3 && ch == '\\'))
|
|
bufpt[j++] = (char) ch;
|
|
}
|
|
}
|
|
if (needQuote)
|
|
bufpt[j++] = '\'';
|
|
bufpt[j] = 0;
|
|
length = j;
|
|
/* The precision is ignored on %q and %Q */
|
|
/* if ( precision>=0 && precision<length ) length = precision; */
|
|
break;
|
|
}
|
|
#ifdef __UNSUPPORTED__
|
|
case etTOKEN:{
|
|
Token *pToken = va_arg(ap, Token *);
|
|
if (pToken && pToken->z) {
|
|
(*func) (arg, (char *) pToken->z, pToken->n);
|
|
}
|
|
length = width = 0;
|
|
break;
|
|
}
|
|
case etSRCLIST:{
|
|
SrcList *pSrc = va_arg(ap, SrcList *);
|
|
int k = va_arg(ap, int);
|
|
struct SrcList_item *pItem = &pSrc->a[k];
|
|
assert(k >= 0 && k < pSrc->nSrc);
|
|
if (pItem->zDatabase && pItem->zDatabase[0]) {
|
|
(*func) (arg, pItem->zDatabase, strlen(pItem->zDatabase));
|
|
(*func) (arg, ".", 1);
|
|
}
|
|
(*func) (arg, pItem->zName, strlen(pItem->zName));
|
|
length = width = 0;
|
|
break;
|
|
}
|
|
#endif
|
|
} /* End switch over the format type */
|
|
/*
|
|
** The text of the conversion is pointed to by "bufpt" and is
|
|
** "length" characters long. The field width is "width". Do
|
|
** the output.
|
|
*/
|
|
if (!flag_leftjustify) {
|
|
register int nspace;
|
|
nspace = width - length;
|
|
if (nspace > 0) {
|
|
count += nspace;
|
|
while (nspace >= etSPACESIZE) {
|
|
(*func) (arg, spaces, etSPACESIZE);
|
|
nspace -= etSPACESIZE;
|
|
}
|
|
if (nspace > 0)
|
|
(*func) (arg, spaces, nspace);
|
|
}
|
|
}
|
|
if (length > 0) {
|
|
(*func) (arg, bufpt, length);
|
|
count += length;
|
|
}
|
|
if (flag_leftjustify) {
|
|
register int nspace;
|
|
nspace = width - length;
|
|
if (nspace > 0) {
|
|
count += nspace;
|
|
while (nspace >= etSPACESIZE) {
|
|
(*func) (arg, spaces, etSPACESIZE);
|
|
nspace -= etSPACESIZE;
|
|
}
|
|
if (nspace > 0)
|
|
(*func) (arg, spaces, nspace);
|
|
}
|
|
}
|
|
if (zExtra) {
|
|
free(zExtra);
|
|
}
|
|
} /* End for loop over the format string */
|
|
return errorflag ? -1 : count;
|
|
} /* End of function */
|
|
|
|
|
|
/* This structure is used to store state information about the
|
|
** write to memory that is currently in progress.
|
|
*/
|
|
struct sgMprintf {
|
|
char *zBase; /* A base allocation */
|
|
char *zText; /* The string collected so far */
|
|
int nChar; /* Length of the string so far */
|
|
int nTotal; /* Output size if unconstrained */
|
|
int nAlloc; /* Amount of space allocated in zText */
|
|
void *(*xRealloc) (void *, int); /* Function used to realloc memory */
|
|
};
|
|
|
|
/*
|
|
** This function implements the callback from vxprintf.
|
|
**
|
|
** This routine add nNewChar characters of text in zNewText to
|
|
** the sgMprintf structure pointed to by "arg".
|
|
*/
|
|
static void mout(void *arg, const char *zNewText, int nNewChar)
|
|
{
|
|
struct sgMprintf *pM = (struct sgMprintf *) arg;
|
|
pM->nTotal += nNewChar;
|
|
if (pM->nChar + nNewChar + 1 > pM->nAlloc) {
|
|
if (pM->xRealloc == 0) {
|
|
nNewChar = pM->nAlloc - pM->nChar - 1;
|
|
} else {
|
|
pM->nAlloc = pM->nChar + nNewChar * 2 + 1;
|
|
if (pM->zText == pM->zBase) {
|
|
pM->zText = pM->xRealloc(0, pM->nAlloc);
|
|
if (pM->zText && pM->nChar) {
|
|
memcpy(pM->zText, pM->zBase, pM->nChar);
|
|
}
|
|
} else {
|
|
char *zNew;
|
|
zNew = pM->xRealloc(pM->zText, pM->nAlloc);
|
|
if (zNew) {
|
|
pM->zText = zNew;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (pM->zText) {
|
|
if (nNewChar > 0) {
|
|
memcpy(&pM->zText[pM->nChar], zNewText, nNewChar);
|
|
pM->nChar += nNewChar;
|
|
}
|
|
pM->zText[pM->nChar] = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** This routine is a wrapper around xprintf() that invokes mout() as
|
|
** the consumer.
|
|
*/
|
|
static char *base_vprintf(void *(*xRealloc) (void *, int), /* Routine to realloc memory. May be NULL */
|
|
int useInternal, /* Use internal %-conversions if true */
|
|
char *zInitBuf, /* Initially write here, before mallocing */
|
|
int nInitBuf, /* Size of zInitBuf[] */
|
|
const char *zFormat, /* format string */
|
|
va_list ap /* arguments */
|
|
)
|
|
{
|
|
struct sgMprintf sM;
|
|
sM.zBase = sM.zText = zInitBuf;
|
|
sM.nChar = sM.nTotal = 0;
|
|
sM.nAlloc = nInitBuf;
|
|
sM.xRealloc = xRealloc;
|
|
vxprintf(mout, &sM, useInternal, zFormat, ap);
|
|
if (xRealloc) {
|
|
if (sM.zText == sM.zBase) {
|
|
sM.zText = xRealloc(0, sM.nChar + 1);
|
|
if (sM.zText) {
|
|
memcpy(sM.zText, sM.zBase, sM.nChar + 1);
|
|
}
|
|
} else if (sM.nAlloc > sM.nChar + 10) {
|
|
char *zNew = xRealloc(sM.zText, sM.nChar + 1);
|
|
if (zNew) {
|
|
sM.zText = zNew;
|
|
}
|
|
}
|
|
}
|
|
return sM.zText;
|
|
}
|
|
|
|
/*
|
|
** Realloc that is a real function, not a macro.
|
|
*/
|
|
static void *printf_realloc(void *old, int size)
|
|
{
|
|
return realloc(old, size);
|
|
}
|
|
|
|
/*
|
|
** Print into memory. Omit the internal %-conversion extensions.
|
|
*/
|
|
SWITCH_DECLARE(char *) switch_vmprintf(const char *zFormat, va_list ap)
|
|
{
|
|
char zBase[SWITCH_PRINT_BUF_SIZE];
|
|
return base_vprintf(printf_realloc, 0, zBase, sizeof(zBase), zFormat, ap);
|
|
}
|
|
|
|
/*
|
|
** Print into memory. Omit the internal %-conversion extensions.
|
|
*/
|
|
SWITCH_DECLARE(char *) switch_mprintf(const char *zFormat, ...)
|
|
{
|
|
va_list ap;
|
|
char *z;
|
|
char zBase[SWITCH_PRINT_BUF_SIZE];
|
|
va_start(ap, zFormat);
|
|
z = base_vprintf(printf_realloc, 0, zBase, sizeof(zBase), zFormat, ap);
|
|
va_end(ap);
|
|
return z;
|
|
}
|
|
|
|
/*
|
|
** sqlite3_snprintf() works like snprintf() except that it ignores the
|
|
** current locale settings. This is important for SQLite because we
|
|
** are not able to use a "," as the decimal point in place of "." as
|
|
** specified by some locales.
|
|
*/
|
|
SWITCH_DECLARE(char *) switch_snprintfv(char *zBuf, int n, const char *zFormat, ...)
|
|
{
|
|
char *z;
|
|
va_list ap;
|
|
|
|
va_start(ap, zFormat);
|
|
z = base_vprintf(0, 0, zBuf, n, zFormat, ap);
|
|
va_end(ap);
|
|
return z;
|
|
}
|
|
|
|
/* For Emacs:
|
|
* Local Variables:
|
|
* mode:c
|
|
* indent-tabs-mode:t
|
|
* tab-width:4
|
|
* c-basic-offset:4
|
|
* End:
|
|
* For VIM:
|
|
* vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet:
|
|
*/
|