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gecko-dev/xpcom/glue/nsTextFormatter.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Portable safe sprintf code.
*
* Code based on mozilla/nsprpub/src/io/prprf.c rev 3.7
*
* Contributor(s):
* Kipp E.B. Hickman <kipp@netscape.com> (original author)
* Frank Yung-Fong Tang <ftang@netscape.com>
* Daniele Nicolodi <daniele@grinta.net>
*/
/*
* Copied from xpcom/ds/nsTextFormatter.cpp r1.22
* Changed to use nsMemory and Frozen linkage
* -- Prasad <prasad@medhas.org>
*/
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include "prdtoa.h"
#include "prlong.h"
#include "prlog.h"
#include "prprf.h"
#include "prmem.h"
#include "nsCRTGlue.h"
#include "nsTextFormatter.h"
#include "nsMemory.h"
/*
** Note: on some platforms va_list is defined as an array,
** and requires array notation.
*/
#ifdef HAVE_VA_COPY
#define VARARGS_ASSIGN(foo, bar) VA_COPY(foo,bar)
#elif defined(HAVE_VA_LIST_AS_ARRAY)
#define VARARGS_ASSIGN(foo, bar) foo[0] = bar[0]
#else
#define VARARGS_ASSIGN(foo, bar) (foo) = (bar)
#endif
typedef struct SprintfStateStr SprintfState;
struct SprintfStateStr {
int (*stuff)(SprintfState *ss, const PRUnichar *sp, uint32_t len);
PRUnichar *base;
PRUnichar *cur;
uint32_t maxlen;
void *stuffclosure;
};
/*
** Numbered Arguement State
*/
struct NumArgState{
int type; /* type of the current ap */
va_list ap; /* point to the corresponding position on ap */
};
#define NAS_DEFAULT_NUM 20 /* default number of NumberedArgumentState array */
#define TYPE_INT16 0
#define TYPE_UINT16 1
#define TYPE_INTN 2
#define TYPE_UINTN 3
#define TYPE_INT32 4
#define TYPE_UINT32 5
#define TYPE_INT64 6
#define TYPE_UINT64 7
#define TYPE_STRING 8
#define TYPE_DOUBLE 9
#define TYPE_INTSTR 10
#define TYPE_UNISTRING 11
#define TYPE_UNKNOWN 20
#define _LEFT 0x1
#define _SIGNED 0x2
#define _SPACED 0x4
#define _ZEROS 0x8
#define _NEG 0x10
#define ELEMENTS_OF(array_) (sizeof(array_) / sizeof(array_[0]))
/*
** Fill into the buffer using the data in src
*/
static int fill2(SprintfState *ss, const PRUnichar *src, int srclen,
int width, int flags)
{
PRUnichar space = ' ';
int rv;
width -= srclen;
/* Right adjusting */
if ((width > 0) && ((flags & _LEFT) == 0)) {
if (flags & _ZEROS) {
space = '0';
}
while (--width >= 0) {
rv = (*ss->stuff)(ss, &space, 1);
if (rv < 0) {
return rv;
}
}
}
/* Copy out the source data */
rv = (*ss->stuff)(ss, src, srclen);
if (rv < 0) {
return rv;
}
/* Left adjusting */
if ((width > 0) && ((flags & _LEFT) != 0)) {
while (--width >= 0) {
rv = (*ss->stuff)(ss, &space, 1);
if (rv < 0) {
return rv;
}
}
}
return 0;
}
/*
** Fill a number. The order is: optional-sign zero-filling conversion-digits
*/
static int fill_n(SprintfState *ss, const PRUnichar *src, int srclen,
int width, int prec, int type, int flags)
{
int zerowidth = 0;
int precwidth = 0;
int signwidth = 0;
int leftspaces = 0;
int rightspaces = 0;
int cvtwidth;
int rv;
PRUnichar sign;
PRUnichar space = ' ';
PRUnichar zero = '0';
if ((type & 1) == 0) {
if (flags & _NEG) {
sign = '-';
signwidth = 1;
} else if (flags & _SIGNED) {
sign = '+';
signwidth = 1;
} else if (flags & _SPACED) {
sign = ' ';
signwidth = 1;
}
}
cvtwidth = signwidth + srclen;
if (prec > 0) {
if (prec > srclen) {
/* Need zero filling */
precwidth = prec - srclen;
cvtwidth += precwidth;
}
}
if ((flags & _ZEROS) && (prec < 0)) {
if (width > cvtwidth) {
/* Zero filling */
zerowidth = width - cvtwidth;
cvtwidth += zerowidth;
}
}
if (flags & _LEFT) {
if (width > cvtwidth) {
/* Space filling on the right (i.e. left adjusting) */
rightspaces = width - cvtwidth;
}
} else {
if (width > cvtwidth) {
/* Space filling on the left (i.e. right adjusting) */
leftspaces = width - cvtwidth;
}
}
while (--leftspaces >= 0) {
rv = (*ss->stuff)(ss, &space, 1);
if (rv < 0) {
return rv;
}
}
if (signwidth) {
rv = (*ss->stuff)(ss, &sign, 1);
if (rv < 0) {
return rv;
}
}
while (--precwidth >= 0) {
rv = (*ss->stuff)(ss, &space, 1);
if (rv < 0) {
return rv;
}
}
while (--zerowidth >= 0) {
rv = (*ss->stuff)(ss, &zero, 1);
if (rv < 0) {
return rv;
}
}
rv = (*ss->stuff)(ss, src, srclen);
if (rv < 0) {
return rv;
}
while (--rightspaces >= 0) {
rv = (*ss->stuff)(ss, &space, 1);
if (rv < 0) {
return rv;
}
}
return 0;
}
/*
** Convert a long into its printable form
*/
static int cvt_l(SprintfState *ss, long num, int width, int prec,
int radix, int type, int flags, const PRUnichar *hexp)
{
PRUnichar cvtbuf[100];
PRUnichar *cvt;
int digits;
/* according to the man page this needs to happen */
if ((prec == 0) && (num == 0)) {
return 0;
}
/*
** Converting decimal is a little tricky. In the unsigned case we
** need to stop when we hit 10 digits. In the signed case, we can
** stop when the number is zero.
*/
cvt = &cvtbuf[0] + ELEMENTS_OF(cvtbuf);
digits = 0;
while (num) {
int digit = (((unsigned long)num) % radix) & 0xF;
*--cvt = hexp[digit];
digits++;
num = (long)(((unsigned long)num) / radix);
}
if (digits == 0) {
*--cvt = '0';
digits++;
}
/*
** Now that we have the number converted without its sign, deal with
** the sign and zero padding.
*/
return fill_n(ss, cvt, digits, width, prec, type, flags);
}
/*
** Convert a 64-bit integer into its printable form
*/
static int cvt_ll(SprintfState *ss, int64_t num, int width, int prec,
int radix, int type, int flags, const PRUnichar *hexp)
{
PRUnichar cvtbuf[100];
PRUnichar *cvt;
int digits;
int64_t rad;
/* according to the man page this needs to happen */
if (prec == 0 && num == 0) {
return 0;
}
/*
** Converting decimal is a little tricky. In the unsigned case we
** need to stop when we hit 10 digits. In the signed case, we can
** stop when the number is zero.
*/
rad = radix;
cvt = &cvtbuf[0] + ELEMENTS_OF(cvtbuf);
digits = 0;
while (num != 0) {
*--cvt = hexp[int32_t(num % rad) & 0xf];
digits++;
num /= rad;
}
if (digits == 0) {
*--cvt = '0';
digits++;
}
/*
** Now that we have the number converted without its sign, deal with
** the sign and zero padding.
*/
return fill_n(ss, cvt, digits, width, prec, type, flags);
}
/*
** Convert a double precision floating point number into its printable
** form.
*/
static int cvt_f(SprintfState *ss, double d, int width, int prec,
const PRUnichar type, int flags)
{
int mode = 2;
int decpt;
int sign;
char buf[256];
char * bufp = buf;
int bufsz = 256;
char num[256];
char * nump;
char * endnum;
int numdigits = 0;
char exp = 'e';
if (prec == -1) {
prec = 6;
} else if (prec > 50) {
// limit precision to avoid PR_dtoa bug 108335
// and to prevent buffers overflows
prec = 50;
}
switch (type) {
case 'f':
numdigits = prec;
mode = 3;
break;
case 'E':
exp = 'E';
// no break
case 'e':
numdigits = prec + 1;
mode = 2;
break;
case 'G':
exp = 'E';
// no break
case 'g':
if (prec == 0) {
prec = 1;
}
numdigits = prec;
mode = 2;
break;
default:
NS_ERROR("invalid type passed to cvt_f");
}
if (PR_dtoa(d, mode, numdigits, &decpt, &sign, &endnum, num, bufsz) == PR_FAILURE) {
buf[0] = '\0';
return -1;
}
numdigits = endnum - num;
nump = num;
if (sign) {
*bufp++ = '-';
} else if (flags & _SIGNED) {
*bufp++ = '+';
}
if (decpt == 9999) {
while ((*bufp++ = *nump++)) { }
} else {
switch (type) {
case 'E':
case 'e':
*bufp++ = *nump++;
if (prec > 0) {
*bufp++ = '.';
while (*nump) {
*bufp++ = *nump++;
prec--;
}
while (prec-- > 0) {
*bufp++ = '0';
}
}
*bufp++ = exp;
PR_snprintf(bufp, bufsz - (bufp - buf), "%+03d", decpt-1);
break;
case 'f':
if (decpt < 1) {
*bufp++ = '0';
if (prec > 0) {
*bufp++ = '.';
while (decpt++ && prec-- > 0) {
*bufp++ = '0';
}
while (*nump && prec-- > 0) {
*bufp++ = *nump++;
}
while (prec-- > 0) {
*bufp++ = '0';
}
}
} else {
while (*nump && decpt-- > 0) {
*bufp++ = *nump++;
}
while (decpt-- > 0) {
*bufp++ = '0';
}
if (prec > 0) {
*bufp++ = '.';
while (*nump && prec-- > 0) {
*bufp++ = *nump++;
}
while (prec-- > 0) {
*bufp++ = '0';
}
}
}
*bufp = '\0';
break;
case 'G':
case 'g':
if ((decpt < -3) || ((decpt - 1) >= prec)) {
*bufp++ = *nump++;
numdigits--;
if (numdigits > 0) {
*bufp++ = '.';
while (*nump) {
*bufp++ = *nump++;
}
}
*bufp++ = exp;
PR_snprintf(bufp, bufsz - (bufp - buf), "%+03d", decpt-1);
} else {
if (decpt < 1) {
*bufp++ = '0';
if (prec > 0) {
*bufp++ = '.';
while (decpt++) {
*bufp++ = '0';
}
while (*nump) {
*bufp++ = *nump++;
}
}
} else {
while (*nump && decpt-- > 0) {
*bufp++ = *nump++;
numdigits--;
}
while (decpt-- > 0) {
*bufp++ = '0';
}
if (numdigits > 0) {
*bufp++ = '.';
while (*nump) {
*bufp++ = *nump++;
}
}
}
*bufp = '\0';
}
}
}
PRUnichar rbuf[256];
PRUnichar *rbufp = rbuf;
bufp = buf;
// cast to PRUnichar
while ((*rbufp++ = *bufp++)) { }
*rbufp = '\0';
return fill2(ss, rbuf, NS_strlen(rbuf), width, flags);
}
/*
** Convert a string into its printable form. "width" is the output
** width. "prec" is the maximum number of characters of "s" to output,
** where -1 means until NUL.
*/
static int cvt_S(SprintfState *ss, const PRUnichar *s, int width,
int prec, int flags)
{
int slen;
if (prec == 0) {
return 0;
}
/* Limit string length by precision value */
slen = s ? NS_strlen(s) : 6;
if (prec > 0) {
if (prec < slen) {
slen = prec;
}
}
/* and away we go */
NS_NAMED_LITERAL_STRING(nullstr, "(null)");
return fill2(ss, s ? s : nullstr.get(), slen, width, flags);
}
/*
** Convert a string into its printable form. "width" is the output
** width. "prec" is the maximum number of characters of "s" to output,
** where -1 means until NUL.
*/
static int cvt_s(SprintfState *ss, const char *s, int width,
int prec, int flags)
{
NS_ConvertUTF8toUTF16 utf16Val(s);
return cvt_S(ss, utf16Val.get(), width, prec, flags);
}
/*
** BuildArgArray stands for Numbered Argument list Sprintf
** for example,
** fmp = "%4$i, %2$d, %3s, %1d";
** the number must start from 1, and no gap among them
*/
static struct NumArgState* BuildArgArray(const PRUnichar *fmt,
va_list ap, int * rv,
struct NumArgState * nasArray)
{
int number = 0, cn = 0, i;
const PRUnichar* p;
PRUnichar c;
struct NumArgState* nas;
/*
** first pass:
** detemine how many legal % I have got, then allocate space
*/
p = fmt;
*rv = 0;
i = 0;
while ((c = *p++) != 0) {
if (c != '%') {
continue;
}
/* skip %% case */
if ((c = *p++) == '%') {
continue;
}
while( c != 0 ){
if (c > '9' || c < '0') {
/* numbered argument csae */
if (c == '$') {
if (i > 0) {
*rv = -1;
return NULL;
}
number++;
break;
} else {
/* non-numbered argument case */
if (number > 0) {
*rv = -1;
return NULL;
}
i = 1;
break;
}
}
c = *p++;
}
}
if (number == 0) {
return NULL;
}
if (number > NAS_DEFAULT_NUM) {
nas = (struct NumArgState*)nsMemory::Alloc(number * sizeof(struct NumArgState));
if (!nas) {
*rv = -1;
return NULL;
}
} else {
nas = nasArray;
}
for (i = 0; i < number; i++) {
nas[i].type = TYPE_UNKNOWN;
}
/*
** second pass:
** set nas[].type
*/
p = fmt;
while ((c = *p++) != 0) {
if (c != '%') {
continue;
}
c = *p++;
if (c == '%') {
continue;
}
cn = 0;
/* should imporve error check later */
while (c && c != '$') {
cn = cn*10 + c - '0';
c = *p++;
}
if (!c || cn < 1 || cn > number) {
*rv = -1;
break;
}
/* nas[cn] starts from 0, and make sure
nas[cn].type is not assigned */
cn--;
if (nas[cn].type != TYPE_UNKNOWN) {
continue;
}
c = *p++;
/* width */
if (c == '*') {
/* not supported feature, for the argument is not numbered */
*rv = -1;
break;
} else {
while ((c >= '0') && (c <= '9')) {
c = *p++;
}
}
/* precision */
if (c == '.') {
c = *p++;
if (c == '*') {
/* not supported feature, for the argument is not numbered */
*rv = -1;
break;
} else {
while ((c >= '0') && (c <= '9')) {
c = *p++;
}
}
}
/* size */
nas[cn].type = TYPE_INTN;
if (c == 'h') {
nas[cn].type = TYPE_INT16;
c = *p++;
} else if (c == 'L') {
/* XXX not quite sure here */
nas[cn].type = TYPE_INT64;
c = *p++;
} else if (c == 'l') {
nas[cn].type = TYPE_INT32;
c = *p++;
if (c == 'l') {
nas[cn].type = TYPE_INT64;
c = *p++;
}
}
/* format */
switch (c) {
case 'd':
case 'c':
case 'i':
case 'o':
case 'u':
case 'x':
case 'X':
break;
case 'e':
case 'f':
case 'g':
nas[cn].type = TYPE_DOUBLE;
break;
case 'p':
/* XXX should use cpp */
if (sizeof(void *) == sizeof(int32_t)) {
nas[cn].type = TYPE_UINT32;
} else if (sizeof(void *) == sizeof(int64_t)) {
nas[cn].type = TYPE_UINT64;
} else if (sizeof(void *) == sizeof(int)) {
nas[cn].type = TYPE_UINTN;
} else {
nas[cn].type = TYPE_UNKNOWN;
}
break;
case 'C':
/* XXX not supported I suppose */
PR_ASSERT(0);
nas[cn].type = TYPE_UNKNOWN;
break;
case 'S':
nas[cn].type = TYPE_UNISTRING;
break;
case 's':
nas[cn].type = TYPE_STRING;
break;
case 'n':
nas[cn].type = TYPE_INTSTR;
break;
default:
PR_ASSERT(0);
nas[cn].type = TYPE_UNKNOWN;
break;
}
/* get a legal para. */
if (nas[cn].type == TYPE_UNKNOWN) {
*rv = -1;
break;
}
}
/*
** third pass
** fill the nas[cn].ap
*/
if (*rv < 0) {
if( nas != nasArray ) {
PR_DELETE(nas);
}
return NULL;
}
cn = 0;
while (cn < number) {
if (nas[cn].type == TYPE_UNKNOWN) {
cn++;
continue;
}
VARARGS_ASSIGN(nas[cn].ap, ap);
switch (nas[cn].type) {
case TYPE_INT16:
case TYPE_UINT16:
case TYPE_INTN:
case TYPE_UINTN: (void)va_arg(ap, int); break;
case TYPE_INT32: (void)va_arg(ap, int32_t); break;
case TYPE_UINT32: (void)va_arg(ap, uint32_t); break;
case TYPE_INT64: (void)va_arg(ap, int64_t); break;
case TYPE_UINT64: (void)va_arg(ap, uint64_t); break;
case TYPE_STRING: (void)va_arg(ap, char*); break;
case TYPE_INTSTR: (void)va_arg(ap, int*); break;
case TYPE_DOUBLE: (void)va_arg(ap, double); break;
case TYPE_UNISTRING: (void)va_arg(ap, PRUnichar*); break;
default:
if( nas != nasArray ) {
PR_DELETE( nas );
}
*rv = -1;
return NULL;
}
cn++;
}
return nas;
}
/*
** The workhorse sprintf code.
*/
static int dosprintf(SprintfState *ss, const PRUnichar *fmt, va_list ap)
{
PRUnichar c;
int flags, width, prec, radix, type;
union {
PRUnichar ch;
int i;
long l;
int64_t ll;
double d;
const char *s;
const PRUnichar *S;
int *ip;
} u;
PRUnichar space = ' ';
nsAutoString hex;
hex.AssignLiteral("0123456789abcdef");
nsAutoString HEX;
HEX.AssignLiteral("0123456789ABCDEF");
const PRUnichar *hexp;
int rv, i;
struct NumArgState* nas = NULL;
struct NumArgState nasArray[NAS_DEFAULT_NUM];
/*
** build an argument array, IF the fmt is numbered argument
** list style, to contain the Numbered Argument list pointers
*/
nas = BuildArgArray (fmt, ap, &rv, nasArray);
if (rv < 0) {
/* the fmt contains error Numbered Argument format, jliu@netscape.com */
PR_ASSERT(0);
return rv;
}
while ((c = *fmt++) != 0) {
if (c != '%') {
rv = (*ss->stuff)(ss, fmt - 1, 1);
if (rv < 0) {
return rv;
}
continue;
}
/*
** Gobble up the % format string. Hopefully we have handled all
** of the strange cases!
*/
flags = 0;
c = *fmt++;
if (c == '%') {
/* quoting a % with %% */
rv = (*ss->stuff)(ss, fmt - 1, 1);
if (rv < 0) {
return rv;
}
continue;
}
if (nas != NULL) {
/* the fmt contains the Numbered Arguments feature */
i = 0;
/* should imporve error check later */
while (c && c != '$') {
i = (i * 10) + (c - '0');
c = *fmt++;
}
if (nas[i-1].type == TYPE_UNKNOWN) {
if (nas && (nas != nasArray)) {
PR_DELETE(nas);
}
return -1;
}
VARARGS_ASSIGN(ap, nas[i-1].ap);
c = *fmt++;
}
/*
* Examine optional flags. Note that we do not implement the
* '#' flag of sprintf(). The ANSI C spec. of the '#' flag is
* somewhat ambiguous and not ideal, which is perhaps why
* the various sprintf() implementations are inconsistent
* on this feature.
*/
while ((c == '-') || (c == '+') || (c == ' ') || (c == '0')) {
if (c == '-') flags |= _LEFT;
if (c == '+') flags |= _SIGNED;
if (c == ' ') flags |= _SPACED;
if (c == '0') flags |= _ZEROS;
c = *fmt++;
}
if (flags & _SIGNED) flags &= ~_SPACED;
if (flags & _LEFT) flags &= ~_ZEROS;
/* width */
if (c == '*') {
c = *fmt++;
width = va_arg(ap, int);
} else {
width = 0;
while ((c >= '0') && (c <= '9')) {
width = (width * 10) + (c - '0');
c = *fmt++;
}
}
/* precision */
prec = -1;
if (c == '.') {
c = *fmt++;
if (c == '*') {
c = *fmt++;
prec = va_arg(ap, int);
} else {
prec = 0;
while ((c >= '0') && (c <= '9')) {
prec = (prec * 10) + (c - '0');
c = *fmt++;
}
}
}
/* size */
type = TYPE_INTN;
if (c == 'h') {
type = TYPE_INT16;
c = *fmt++;
} else if (c == 'L') {
/* XXX not quite sure here */
type = TYPE_INT64;
c = *fmt++;
} else if (c == 'l') {
type = TYPE_INT32;
c = *fmt++;
if (c == 'l') {
type = TYPE_INT64;
c = *fmt++;
}
}
/* format */
hexp = hex.get();
switch (c) {
case 'd':
case 'i': /* decimal/integer */
radix = 10;
goto fetch_and_convert;
case 'o': /* octal */
radix = 8;
type |= 1;
goto fetch_and_convert;
case 'u': /* unsigned decimal */
radix = 10;
type |= 1;
goto fetch_and_convert;
case 'x': /* unsigned hex */
radix = 16;
type |= 1;
goto fetch_and_convert;
case 'X': /* unsigned HEX */
radix = 16;
hexp = HEX.get();
type |= 1;
goto fetch_and_convert;
fetch_and_convert:
switch (type) {
case TYPE_INT16:
u.l = va_arg(ap, int);
if (u.l < 0) {
u.l = -u.l;
flags |= _NEG;
}
goto do_long;
case TYPE_UINT16:
u.l = va_arg(ap, int) & 0xffff;
goto do_long;
case TYPE_INTN:
u.l = va_arg(ap, int);
if (u.l < 0) {
u.l = -u.l;
flags |= _NEG;
}
goto do_long;
case TYPE_UINTN:
u.l = (long)va_arg(ap, unsigned int);
goto do_long;
case TYPE_INT32:
u.l = va_arg(ap, int32_t);
if (u.l < 0) {
u.l = -u.l;
flags |= _NEG;
}
goto do_long;
case TYPE_UINT32:
u.l = (long)va_arg(ap, uint32_t);
do_long:
rv = cvt_l(ss, u.l, width, prec, radix, type, flags, hexp);
if (rv < 0) {
return rv;
}
break;
case TYPE_INT64:
u.ll = va_arg(ap, int64_t);
if (u.ll < 0) {
u.ll = -u.ll;
flags |= _NEG;
}
goto do_longlong;
case TYPE_UINT64:
u.ll = va_arg(ap, uint64_t);
do_longlong:
rv = cvt_ll(ss, u.ll, width, prec, radix, type, flags, hexp);
if (rv < 0) {
return rv;
}
break;
}
break;
case 'e':
case 'E':
case 'f':
case 'g':
case 'G':
u.d = va_arg(ap, double);
rv = cvt_f(ss, u.d, width, prec, c, flags);
if (rv < 0) {
return rv;
}
break;
case 'c':
u.ch = va_arg(ap, int);
if ((flags & _LEFT) == 0) {
while (width-- > 1) {
rv = (*ss->stuff)(ss, &space, 1);
if (rv < 0) {
return rv;
}
}
}
rv = (*ss->stuff)(ss, &u.ch, 1);
if (rv < 0) {
return rv;
}
if (flags & _LEFT) {
while (width-- > 1) {
rv = (*ss->stuff)(ss, &space, 1);
if (rv < 0) {
return rv;
}
}
}
break;
case 'p':
if (sizeof(void *) == sizeof(int32_t)) {
type = TYPE_UINT32;
} else if (sizeof(void *) == sizeof(int64_t)) {
type = TYPE_UINT64;
} else if (sizeof(void *) == sizeof(int)) {
type = TYPE_UINTN;
} else {
PR_ASSERT(0);
break;
}
radix = 16;
goto fetch_and_convert;
#if 0
case 'C':
/* XXX not supported I suppose */
PR_ASSERT(0);
break;
#endif
case 'S':
u.S = va_arg(ap, const PRUnichar*);
rv = cvt_S(ss, u.S, width, prec, flags);
if (rv < 0) {
return rv;
}
break;
case 's':
u.s = va_arg(ap, const char*);
rv = cvt_s(ss, u.s, width, prec, flags);
if (rv < 0) {
return rv;
}
break;
case 'n':
u.ip = va_arg(ap, int*);
if (u.ip) {
*u.ip = ss->cur - ss->base;
}
break;
default:
/* Not a % token after all... skip it */
#if 0
PR_ASSERT(0);
#endif
PRUnichar perct = '%';
rv = (*ss->stuff)(ss, &perct, 1);
if (rv < 0) {
return rv;
}
rv = (*ss->stuff)(ss, fmt - 1, 1);
if (rv < 0) {
return rv;
}
}
}
/* Stuff trailing NUL */
PRUnichar null = '\0';
rv = (*ss->stuff)(ss, &null, 1);
if( nas && ( nas != nasArray ) ){
PR_DELETE( nas );
}
return rv;
}
/************************************************************************/
static int
StringStuff(SprintfState* ss, const PRUnichar* sp, uint32_t len)
{
if (*sp == '\0')
return 0;
ptrdiff_t off = ss->cur - ss->base;
nsAString* str = static_cast<nsAString*>(ss->stuffclosure);
str->Append(sp, len);
ss->base = str->BeginWriting();
ss->cur = ss->base + off;
return 0;
}
/*
** Stuff routine that automatically grows the malloc'd output buffer
** before it overflows.
*/
static int GrowStuff(SprintfState *ss, const PRUnichar *sp, uint32_t len)
{
ptrdiff_t off;
PRUnichar *newbase;
uint32_t newlen;
off = ss->cur - ss->base;
if (off + len >= ss->maxlen) {
/* Grow the buffer */
newlen = ss->maxlen + ((len > 32) ? len : 32);
if (ss->base) {
newbase = (PRUnichar*) nsMemory::Realloc(ss->base, newlen*sizeof(PRUnichar));
} else {
newbase = (PRUnichar*) nsMemory::Alloc(newlen*sizeof(PRUnichar));
}
if (!newbase) {
/* Ran out of memory */
return -1;
}
ss->base = newbase;
ss->maxlen = newlen;
ss->cur = ss->base + off;
}
/* Copy data */
while (len) {
--len;
*ss->cur++ = *sp++;
}
PR_ASSERT((uint32_t)(ss->cur - ss->base) <= ss->maxlen);
return 0;
}
/*
** sprintf into a malloc'd buffer
*/
PRUnichar * nsTextFormatter::smprintf(const PRUnichar *fmt, ...)
{
va_list ap;
PRUnichar *rv;
va_start(ap, fmt);
rv = nsTextFormatter::vsmprintf(fmt, ap);
va_end(ap);
return rv;
}
uint32_t nsTextFormatter::ssprintf(nsAString& out, const PRUnichar* fmt, ...)
{
va_list ap;
uint32_t rv;
va_start(ap, fmt);
rv = nsTextFormatter::vssprintf(out, fmt, ap);
va_end(ap);
return rv;
}
uint32_t nsTextFormatter::vssprintf(nsAString& out, const PRUnichar* fmt, va_list ap)
{
SprintfState ss;
ss.stuff = StringStuff;
ss.base = 0;
ss.cur = 0;
ss.maxlen = 0;
ss.stuffclosure = &out;
out.Truncate();
int n = dosprintf(&ss, fmt, ap);
return n ? n - 1 : n;
}
PRUnichar * nsTextFormatter::vsmprintf(const PRUnichar *fmt, va_list ap)
{
SprintfState ss;
int rv;
ss.stuff = GrowStuff;
ss.base = 0;
ss.cur = 0;
ss.maxlen = 0;
rv = dosprintf(&ss, fmt, ap);
if (rv < 0) {
if (ss.base) {
PR_DELETE(ss.base);
}
return 0;
}
return ss.base;
}
/*
** Stuff routine that discards overflow data
*/
static int LimitStuff(SprintfState *ss, const PRUnichar *sp, uint32_t len)
{
uint32_t limit = ss->maxlen - (ss->cur - ss->base);
if (len > limit) {
len = limit;
}
while (len) {
--len;
*ss->cur++ = *sp++;
}
return 0;
}
/*
** sprintf into a fixed size buffer. Make sure there is a NUL at the end
** when finished.
*/
uint32_t nsTextFormatter::snprintf(PRUnichar *out, uint32_t outlen, const PRUnichar *fmt, ...)
{
va_list ap;
uint32_t rv;
PR_ASSERT((int32_t)outlen > 0);
if ((int32_t)outlen <= 0) {
return 0;
}
va_start(ap, fmt);
rv = nsTextFormatter::vsnprintf(out, outlen, fmt, ap);
va_end(ap);
return rv;
}
uint32_t nsTextFormatter::vsnprintf(PRUnichar *out, uint32_t outlen,const PRUnichar *fmt,
va_list ap)
{
SprintfState ss;
uint32_t n;
PR_ASSERT((int32_t)outlen > 0);
if ((int32_t)outlen <= 0) {
return 0;
}
ss.stuff = LimitStuff;
ss.base = out;
ss.cur = out;
ss.maxlen = outlen;
(void) dosprintf(&ss, fmt, ap);
/* If we added chars, and we didn't append a null, do it now. */
if( (ss.cur != ss.base) && (*(ss.cur - 1) != '\0') )
*(--ss.cur) = '\0';
n = ss.cur - ss.base;
return n ? n - 1 : n;
}
/*
* Free memory allocated, for the caller, by smprintf
*/
void nsTextFormatter::smprintf_free(PRUnichar *mem)
{
nsMemory::Free(mem);
}
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