--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/JavaScriptCore/wtf/symbian/snprintf.c Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,1052 @@
+/*
+ * Copyright (c) 1983, 1995, 1996 Eric P. Allman
+ * Copyright (c) 1988, 1993
+ * The Regents of the University of California. All rights reserved.
+ * Copyright (C) 2007 Nokia Inc. 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 University 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 REGENTS 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 REGENTS 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.
+ *
+ * $PostgreSQL: pgsql/src/port/snprintf.c,v 1.34 2007/03/26 21:44:11 momjian Exp $
+ */
+
+#include <ctype.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <e32def.h>
+#include <limits.h>
+#include <stdio.h>
+#ifndef WIN32
+#include <sys/ioctl.h>
+#endif
+#include <sys/param.h>
+
+#ifndef NL_ARGMAX
+#define NL_ARGMAX 16
+#endif
+
+/*
+ * SNPRINTF, VSNPRINTF and friends
+ *
+ * These versions have been grabbed off the net. They have been
+ * cleaned up to compile properly and support for most of the Single Unix
+ * Specification has been added. Remaining unimplemented features are:
+ *
+ * 1. No locale support: the radix character is always '.' and the '
+ * (single quote) format flag is ignored.
+ *
+ * 2. No support for the "%n" format specification.
+ *
+ * 3. No support for wide characters ("lc" and "ls" formats).
+ *
+ * 4. No support for "long double" ("Lf" and related formats).
+ *
+ * 5. Space and '#' flags are not implemented.
+ *
+ *
+ * The result values of these functions are not the same across different
+ * platforms. This implementation is compatible with the Single Unix Spec:
+ *
+ * 1. -1 is returned only if processing is abandoned due to an invalid
+ * parameter, such as incorrect format string. (Although not required by
+ * the spec, this happens only when no characters have yet been transmitted
+ * to the destination.)
+ *
+ * 2. For snprintf and sprintf, 0 is returned if str == NULL or count == 0;
+ * no data has been stored.
+ *
+ * 3. Otherwise, the number of bytes actually transmitted to the destination
+ * is returned (excluding the trailing '\0' for snprintf and sprintf).
+ *
+ * For snprintf with nonzero count, the result cannot be more than count-1
+ * (a trailing '\0' is always stored); it is not possible to distinguish
+ * buffer overrun from exact fit. This is unlike some implementations that
+ * return the number of bytes that would have been needed for the complete
+ * result string.
+ */
+
+/**************************************************************
+ * Original:
+ * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
+ * A bombproof version of doprnt (dopr) included.
+ * Sigh. This sort of thing is always nasty do deal with. Note that
+ * the version here does not include floating point. (now it does ... tgl)
+ **************************************************************/
+
+/* Prevent recursion */
+#undef vsnprintf
+#undef snprintf
+#undef sprintf
+#undef vfprintf
+#undef fprintf
+#undef printf
+
+static int errno;
+#define EINVAL -1
+#define int64 long long
+#define uint64 unsigned long long
+#ifndef MAX
+#define MAX(p,q) (((p) >= (q)) ? (p) : (q))
+#endif
+
+#ifndef MIN
+#define MIN(p,q) (((p) <= (q)) ? (p) : (q))
+#endif
+
+/* Info about where the formatted output is going */
+typedef struct
+{
+ char *bufptr; /* next buffer output position */
+ char *bufstart; /* first buffer element */
+ char *bufend; /* last buffer element, or NULL */
+ /* bufend == NULL is for sprintf, where we assume buf is big enough */
+ FILE *stream; /* eventual output destination, or NULL */
+ int nchars; /* # chars already sent to stream */
+} PrintfTarget;
+
+/*
+ * Info about the type and value of a formatting parameter. Note that we
+ * don't currently support "long double", "wint_t", or "wchar_t *" data,
+ * nor the '%n' formatting code; else we'd need more types. Also, at this
+ * level we need not worry about signed vs unsigned values.
+ */
+typedef enum
+{
+ ATYPE_NONE = 0,
+ ATYPE_INT,
+ ATYPE_LONG,
+ ATYPE_LONGLONG,
+ ATYPE_DOUBLE,
+ ATYPE_CHARPTR
+} PrintfArgType;
+
+typedef union
+{
+ int i;
+ long l;
+ int64 ll;
+ double d;
+ char *cptr;
+} PrintfArgValue;
+
+
+void flushbuffer(PrintfTarget *target);
+int dopr(PrintfTarget *target, const char *format, va_list args);
+
+
+EXPORT_C int
+vsnprintf(char *str, size_t count, const char *fmt, va_list args)
+{
+ PrintfTarget target;
+
+ if (str == NULL || count == 0)
+ return 0;
+ target.bufstart = target.bufptr = str;
+ target.bufend = str + count - 1;
+ target.stream = NULL;
+ /* target.nchars is unused in this case */
+ if (dopr(&target, fmt, args))
+ {
+ *(target.bufptr) = '\0';
+ errno = EINVAL; /* bad format */
+ return -1;
+ }
+ *(target.bufptr) = '\0';
+ return target.bufptr - target.bufstart;
+}
+
+EXPORT_C int
+snprintf(char *str, size_t count, const char *fmt,...)
+{
+ int len;
+ va_list args;
+
+ va_start(args, fmt);
+ len = vsnprintf(str, count, fmt, args);
+ va_end(args);
+ return len;
+}
+
+static int
+pg_vsprintf(char *str, const char *fmt, va_list args)
+{
+ PrintfTarget target;
+
+ if (str == NULL)
+ return 0;
+ target.bufstart = target.bufptr = str;
+ target.bufend = NULL;
+ target.stream = NULL;
+ /* target.nchars is unused in this case */
+ if (dopr(&target, fmt, args))
+ {
+ *(target.bufptr) = '\0';
+ errno = EINVAL; /* bad format */
+ return -1;
+ }
+ *(target.bufptr) = '\0';
+ return target.bufptr - target.bufstart;
+}
+
+int
+pg_sprintf(char *str, const char *fmt,...)
+{
+ int len;
+ va_list args;
+
+ va_start(args, fmt);
+ len = pg_vsprintf(str, fmt, args);
+ va_end(args);
+ return len;
+}
+
+int
+pg_vfprintf(FILE *stream, const char *fmt, va_list args)
+{
+ PrintfTarget target;
+ char buffer[1024]; /* size is arbitrary */
+
+ if (stream == NULL)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ target.bufstart = target.bufptr = buffer;
+ target.bufend = buffer + sizeof(buffer) - 1;
+ target.stream = stream;
+ target.nchars = 0;
+ if (dopr(&target, fmt, args))
+ {
+ errno = EINVAL; /* bad format */
+ return -1;
+ }
+ /* dump any remaining buffer contents */
+ flushbuffer(&target);
+ return target.nchars;
+}
+
+int
+pg_fprintf(FILE *stream, const char *fmt,...)
+{
+ int len;
+ va_list args;
+
+ va_start(args, fmt);
+ len = pg_vfprintf(stream, fmt, args);
+ va_end(args);
+ return len;
+}
+
+int
+pg_printf(const char *fmt,...)
+{
+ int len;
+ va_list args;
+
+ va_start(args, fmt);
+ len = pg_vfprintf(stdout, fmt, args);
+ va_end(args);
+ return len;
+}
+
+/* call this only when stream is defined */
+static void
+flushbuffer(PrintfTarget *target)
+{
+ size_t nc = target->bufptr - target->bufstart;
+
+ if (nc > 0)
+ target->nchars += fwrite(target->bufstart, 1, nc, target->stream);
+ target->bufptr = target->bufstart;
+}
+
+
+static void fmtstr(char *value, int leftjust, int minlen, int MAXwidth,
+ int pointflag, PrintfTarget *target);
+static void fmtptr(void *value, PrintfTarget *target);
+static void fmtint(int64 value, char type, int forcesign,
+ int leftjust, int minlen, int zpad, int precision, int pointflag,
+ PrintfTarget *target);
+static void fmtchar(int value, int leftjust, int minlen, PrintfTarget *target);
+static void fmtfloat(double value, char type, int forcesign,
+ int leftjust, int minlen, int zpad, int precision, int pointflag,
+ PrintfTarget *target);
+static void dostr(const char *str, int slen, PrintfTarget *target);
+static void dopr_outch(int c, PrintfTarget *target);
+static int adjust_sign(int is_negative, int forcesign, int *signvalue);
+static void adjust_padlen(int minlen, int vallen, int leftjust, int *padlen);
+static void leading_pad(int zpad, int *signvalue, int *padlen,
+ PrintfTarget *target);
+static void trailing_pad(int *padlen, PrintfTarget *target);
+
+
+/*
+ * dopr(): poor man's version of doprintf
+ */
+static int
+dopr(PrintfTarget *target, const char *format, va_list args)
+{
+ const char *format_start = format;
+ int ch;
+ int have_dollar;
+ int have_non_dollar;
+ int have_star;
+ int afterstar;
+ int accum;
+ int longlongflag;
+ int longflag;
+ int pointflag;
+ int leftjust;
+ int fieldwidth;
+ int precision;
+ int zpad;
+ int forcesign;
+ int last_dollar;
+ int fmtpos;
+ int cvalue;
+ int64 numvalue;
+ double fvalue;
+ char *strvalue;
+ int i;
+ PrintfArgType argtypes[NL_ARGMAX + 1];
+ PrintfArgValue argvalues[NL_ARGMAX + 1];
+
+ /*
+ * Parse the format string to determine whether there are %n$ format
+ * specs, and identify the types and order of the format parameters.
+ */
+ have_dollar = have_non_dollar = 0;
+ last_dollar = 0;
+ memset(argtypes, 0, sizeof(argtypes));
+
+ while ((ch = *format++) != '\0')
+ {
+ if (ch != '%')
+ continue;
+ longflag = longlongflag = pointflag = 0;
+ fmtpos = accum = 0;
+ afterstar = 0;
+nextch1:
+ ch = *format++;
+ if (ch == '\0')
+ break; /* illegal, but we don't complain */
+ switch (ch)
+ {
+ case '-':
+ case '+':
+ goto nextch1;
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ accum = accum * 10 + (ch - '0');
+ goto nextch1;
+ case '.':
+ pointflag = 1;
+ accum = 0;
+ goto nextch1;
+ case '*':
+ if (afterstar)
+ have_non_dollar = 1; /* multiple stars */
+ afterstar = 1;
+ accum = 0;
+ goto nextch1;
+ case '$':
+ have_dollar = 1;
+ if (accum <= 0 || accum > NL_ARGMAX)
+ return -1;
+ if (afterstar)
+ {
+ if (argtypes[accum] &&
+ argtypes[accum] != ATYPE_INT)
+ return -1;
+ argtypes[accum] = ATYPE_INT;
+ last_dollar = MAX(last_dollar, accum);
+ afterstar = 0;
+ }
+ else
+ fmtpos = accum;
+ accum = 0;
+ goto nextch1;
+ case 'l':
+ if (longflag)
+ longlongflag = 1;
+ else
+ longflag = 1;
+ goto nextch1;
+ case 'h':
+ case '\'':
+ /* ignore these */
+ goto nextch1;
+ case 'd':
+ case 'i':
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ if (fmtpos)
+ {
+ PrintfArgType atype;
+
+ if (longlongflag)
+ atype = ATYPE_LONGLONG;
+ else if (longflag)
+ atype = ATYPE_LONG;
+ else
+ atype = ATYPE_INT;
+ if (argtypes[fmtpos] &&
+ argtypes[fmtpos] != atype)
+ return -1;
+ argtypes[fmtpos] = atype;
+ last_dollar = MAX(last_dollar, fmtpos);
+ }
+ else
+ have_non_dollar = 1;
+ break;
+ case 'c':
+ if (fmtpos)
+ {
+ if (argtypes[fmtpos] &&
+ argtypes[fmtpos] != ATYPE_INT)
+ return -1;
+ argtypes[fmtpos] = ATYPE_INT;
+ last_dollar = MAX(last_dollar, fmtpos);
+ }
+ else
+ have_non_dollar = 1;
+ break;
+ case 's':
+ case 'p':
+ if (fmtpos)
+ {
+ if (argtypes[fmtpos] &&
+ argtypes[fmtpos] != ATYPE_CHARPTR)
+ return -1;
+ argtypes[fmtpos] = ATYPE_CHARPTR;
+ last_dollar = MAX(last_dollar, fmtpos);
+ }
+ else
+ have_non_dollar = 1;
+ break;
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'g':
+ case 'G':
+ if (fmtpos)
+ {
+ if (argtypes[fmtpos] &&
+ argtypes[fmtpos] != ATYPE_DOUBLE)
+ return -1;
+ argtypes[fmtpos] = ATYPE_DOUBLE;
+ last_dollar = MAX(last_dollar, fmtpos);
+ }
+ else
+ have_non_dollar = 1;
+ break;
+ case '%':
+ break;
+ }
+
+ /*
+ * If we finish the spec with afterstar still set, there's a
+ * non-dollar star in there.
+ */
+ if (afterstar)
+ have_non_dollar = 1;
+ }
+
+ /* Per spec, you use either all dollar or all not. */
+ if (have_dollar && have_non_dollar)
+ return -1;
+
+ /*
+ * In dollar mode, collect the arguments in physical order.
+ */
+ for (i = 1; i <= last_dollar; i++)
+ {
+ switch (argtypes[i])
+ {
+ case ATYPE_NONE:
+ return -1; /* invalid format */
+ case ATYPE_INT:
+ argvalues[i].i = va_arg(args, int);
+ break;
+ case ATYPE_LONG:
+ argvalues[i].l = va_arg(args, long);
+ break;
+ case ATYPE_LONGLONG:
+ argvalues[i].ll = va_arg(args, int64);
+ break;
+ case ATYPE_DOUBLE:
+ argvalues[i].d = va_arg(args, double);
+ break;
+ case ATYPE_CHARPTR:
+ argvalues[i].cptr = va_arg(args, char *);
+ break;
+ }
+ }
+
+ /*
+ * At last we can parse the format for real.
+ */
+ format = format_start;
+ while ((ch = *format++) != '\0')
+ {
+ if (ch != '%')
+ {
+ dopr_outch(ch, target);
+ continue;
+ }
+ fieldwidth = precision = zpad = leftjust = forcesign = 0;
+ longflag = longlongflag = pointflag = 0;
+ fmtpos = accum = 0;
+ have_star = afterstar = 0;
+nextch2:
+ ch = *format++;
+ if (ch == '\0')
+ break; /* illegal, but we don't complain */
+ switch (ch)
+ {
+ case '-':
+ leftjust = 1;
+ goto nextch2;
+ case '+':
+ forcesign = 1;
+ goto nextch2;
+ case '0':
+ /* set zero padding if no nonzero digits yet */
+ if (accum == 0 && !pointflag)
+ zpad = '0';
+ /* FALL THRU */
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ accum = accum * 10 + (ch - '0');
+ goto nextch2;
+ case '.':
+ if (have_star)
+ have_star = 0;
+ else
+ fieldwidth = accum;
+ pointflag = 1;
+ accum = 0;
+ goto nextch2;
+ case '*':
+ if (have_dollar)
+ {
+ /* process value after reading n$ */
+ afterstar = 1;
+ }
+ else
+ {
+ /* fetch and process value now */
+ int starval = va_arg(args, int);
+
+ if (pointflag)
+ {
+ precision = starval;
+ if (precision < 0)
+ precision = 0;
+ }
+ else
+ {
+ fieldwidth = starval;
+ if (fieldwidth < 0)
+ {
+ leftjust = 1;
+ fieldwidth = -fieldwidth;
+ }
+ }
+ }
+ have_star = 1;
+ accum = 0;
+ goto nextch2;
+ case '$':
+ if (afterstar)
+ {
+ /* fetch and process star value */
+ int starval = argvalues[accum].i;
+
+ if (pointflag)
+ {
+ precision = starval;
+ if (precision < 0)
+ precision = 0;
+ }
+ else
+ {
+ fieldwidth = starval;
+ if (fieldwidth < 0)
+ {
+ leftjust = 1;
+ fieldwidth = -fieldwidth;
+ }
+ }
+ afterstar = 0;
+ }
+ else
+ fmtpos = accum;
+ accum = 0;
+ goto nextch2;
+ case 'l':
+ if (longflag)
+ longlongflag = 1;
+ else
+ longflag = 1;
+ goto nextch2;
+ case 'h':
+ case '\'':
+ /* ignore these */
+ goto nextch2;
+ case 'd':
+ case 'i':
+ if (!have_star)
+ {
+ if (pointflag)
+ precision = accum;
+ else
+ fieldwidth = accum;
+ }
+ if (have_dollar)
+ {
+ if (longlongflag)
+ numvalue = argvalues[fmtpos].ll;
+ else if (longflag)
+ numvalue = argvalues[fmtpos].l;
+ else
+ numvalue = argvalues[fmtpos].i;
+ }
+ else
+ {
+ if (longlongflag)
+ numvalue = va_arg(args, int64);
+ else if (longflag)
+ numvalue = va_arg(args, long);
+ else
+ numvalue = va_arg(args, int);
+ }
+ fmtint(numvalue, ch, forcesign, leftjust, fieldwidth, zpad,
+ precision, pointflag, target);
+ break;
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ if (!have_star)
+ {
+ if (pointflag)
+ precision = accum;
+ else
+ fieldwidth = accum;
+ }
+ if (have_dollar)
+ {
+ if (longlongflag)
+ numvalue = (uint64) argvalues[fmtpos].ll;
+ else if (longflag)
+ numvalue = (unsigned long) argvalues[fmtpos].l;
+ else
+ numvalue = (unsigned int) argvalues[fmtpos].i;
+ }
+ else
+ {
+ if (longlongflag)
+ numvalue = (uint64) va_arg(args, int64);
+ else if (longflag)
+ numvalue = (unsigned long) va_arg(args, long);
+ else
+ numvalue = (unsigned int) va_arg(args, int);
+ }
+ fmtint(numvalue, ch, forcesign, leftjust, fieldwidth, zpad,
+ precision, pointflag, target);
+ break;
+ case 'c':
+ if (!have_star)
+ {
+ if (pointflag)
+ precision = accum;
+ else
+ fieldwidth = accum;
+ }
+ if (have_dollar)
+ cvalue = (unsigned char) argvalues[fmtpos].i;
+ else
+ cvalue = (unsigned char) va_arg(args, int);
+ fmtchar(cvalue, leftjust, fieldwidth, target);
+ break;
+ case 's':
+ if (!have_star)
+ {
+ if (pointflag)
+ precision = accum;
+ else
+ fieldwidth = accum;
+ }
+ if (have_dollar)
+ strvalue = argvalues[fmtpos].cptr;
+ else
+ strvalue = va_arg(args, char *);
+ fmtstr(strvalue, leftjust, fieldwidth, precision, pointflag,
+ target);
+ break;
+ case 'p':
+ /* fieldwidth/leftjust are ignored ... */
+ if (have_dollar)
+ strvalue = argvalues[fmtpos].cptr;
+ else
+ strvalue = va_arg(args, char *);
+ fmtptr((void *) strvalue, target);
+ break;
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'g':
+ case 'G':
+ if (!have_star)
+ {
+ if (pointflag)
+ precision = accum;
+ else
+ fieldwidth = accum;
+ }
+ if (have_dollar)
+ fvalue = argvalues[fmtpos].d;
+ else
+ fvalue = va_arg(args, double);
+ fmtfloat(fvalue, ch, forcesign, leftjust,
+ fieldwidth, zpad,
+ precision, pointflag,
+ target);
+ break;
+ case '%':
+ dopr_outch('%', target);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static size_t
+pg_strnlen(const char *str, size_t MAXlen)
+{
+ const char *p = str;
+
+ while (MAXlen-- > 0 && *p)
+ p++;
+ return p - str;
+}
+
+static void
+fmtstr(char *value, int leftjust, int minlen, int MAXwidth,
+ int pointflag, PrintfTarget *target)
+{
+ int padlen,
+ vallen; /* amount to pad */
+
+ /*
+ * If a MAXwidth (precision) is specified, we must not fetch more bytes
+ * than that.
+ */
+ if (pointflag)
+ vallen = pg_strnlen(value, MAXwidth);
+ else
+ vallen = strlen(value);
+
+ adjust_padlen(minlen, vallen, leftjust, &padlen);
+
+ while (padlen > 0)
+ {
+ dopr_outch(' ', target);
+ --padlen;
+ }
+
+ dostr(value, vallen, target);
+
+ trailing_pad(&padlen, target);
+}
+
+static void
+fmtptr(void *value, PrintfTarget *target)
+{
+ int vallen;
+ char convert[64];
+
+ /* we rely on regular C library's sprintf to do the basic conversion */
+ vallen = sprintf(convert, "%p", value);
+
+ dostr(convert, vallen, target);
+}
+
+static void
+fmtint(int64 value, char type, int forcesign, int leftjust,
+ int minlen, int zpad, int precision, int pointflag,
+ PrintfTarget *target)
+{
+ uint64 base;
+ int dosign;
+ const char *cvt = "0123456789abcdef";
+ int signvalue = 0;
+ char convert[64];
+ int vallen = 0;
+ int padlen = 0; /* amount to pad */
+ int zeropad; /* extra leading zeroes */
+
+ switch (type)
+ {
+ case 'd':
+ case 'i':
+ base = 10;
+ dosign = 1;
+ break;
+ case 'o':
+ base = 8;
+ dosign = 0;
+ break;
+ case 'u':
+ base = 10;
+ dosign = 0;
+ break;
+ case 'x':
+ base = 16;
+ dosign = 0;
+ break;
+ case 'X':
+ cvt = "0123456789ABCDEF";
+ base = 16;
+ dosign = 0;
+ break;
+ default:
+ return; /* keep compiler quiet */
+ }
+
+ /* Handle +/- */
+ if (dosign && adjust_sign((value < 0), forcesign, &signvalue))
+ value = -value;
+
+ /*
+ * SUS: the result of converting 0 with an explicit precision of 0 is no
+ * characters
+ */
+ if (value == 0 && pointflag && precision == 0)
+ vallen = 0;
+ else
+ {
+ /* make integer string */
+ uint64 uvalue = (uint64) value;
+
+ do
+ {
+ convert[vallen++] = cvt[uvalue % base];
+ uvalue = uvalue / base;
+ } while (uvalue);
+ }
+
+ zeropad = MAX(0, precision - vallen);
+
+ adjust_padlen(minlen, vallen + zeropad, leftjust, &padlen);
+
+ leading_pad(zpad, &signvalue, &padlen, target);
+
+ while (zeropad-- > 0)
+ dopr_outch('0', target);
+
+ while (vallen > 0)
+ dopr_outch(convert[--vallen], target);
+
+ trailing_pad(&padlen, target);
+}
+
+static void
+fmtchar(int value, int leftjust, int minlen, PrintfTarget *target)
+{
+ int padlen = 0; /* amount to pad */
+
+ adjust_padlen(minlen, 1, leftjust, &padlen);
+
+ while (padlen > 0)
+ {
+ dopr_outch(' ', target);
+ --padlen;
+ }
+
+ dopr_outch(value, target);
+
+ trailing_pad(&padlen, target);
+}
+
+static void
+fmtfloat(double value, char type, int forcesign, int leftjust,
+ int minlen, int zpad, int precision, int pointflag,
+ PrintfTarget *target)
+{
+ int signvalue = 0;
+ int vallen;
+ char fmt[32];
+ char convert[512];
+ int padlen = 0; /* amount to pad */
+
+ /* we rely on regular C library's sprintf to do the basic conversion */
+ if (pointflag)
+ sprintf(fmt, "%%.%d%c", precision, type);
+ else
+ sprintf(fmt, "%%%c", type);
+
+ if (adjust_sign((value < 0), forcesign, &signvalue))
+ value = -value;
+
+ vallen = sprintf(convert, fmt, value);
+
+ adjust_padlen(minlen, vallen, leftjust, &padlen);
+
+ leading_pad(zpad, &signvalue, &padlen, target);
+
+ dostr(convert, vallen, target);
+
+ trailing_pad(&padlen, target);
+}
+
+static void
+dostr(const char *str, int slen, PrintfTarget *target)
+{
+ while (slen > 0)
+ {
+ int avail;
+
+ if (target->bufend != NULL)
+ avail = target->bufend - target->bufptr;
+ else
+ avail = slen;
+ if (avail <= 0)
+ {
+ /* buffer full, can we dump to stream? */
+ if (target->stream == NULL)
+ return; /* no, lose the data */
+ flushbuffer(target);
+ continue;
+ }
+ avail = MIN(avail, slen);
+ memmove(target->bufptr, str, avail);
+ target->bufptr += avail;
+ str += avail;
+ slen -= avail;
+ }
+}
+
+static void
+dopr_outch(int c, PrintfTarget *target)
+{
+ if (target->bufend != NULL && target->bufptr >= target->bufend)
+ {
+ /* buffer full, can we dump to stream? */
+ if (target->stream == NULL)
+ return; /* no, lose the data */
+ flushbuffer(target);
+ }
+ *(target->bufptr++) = c;
+}
+
+
+static int
+adjust_sign(int is_negative, int forcesign, int *signvalue)
+{
+ if (is_negative)
+ {
+ *signvalue = '-';
+ return 1;
+ }
+ else if (forcesign)
+ *signvalue = '+';
+ return 0;
+}
+
+
+static void
+adjust_padlen(int minlen, int vallen, int leftjust, int *padlen)
+{
+ *padlen = minlen - vallen;
+ if (*padlen < 0)
+ *padlen = 0;
+ if (leftjust)
+ *padlen = -(*padlen);
+}
+
+
+static void
+leading_pad(int zpad, int *signvalue, int *padlen, PrintfTarget *target)
+{
+ if (*padlen > 0 && zpad)
+ {
+ if (*signvalue)
+ {
+ dopr_outch(*signvalue, target);
+ --(*padlen);
+ *signvalue = 0;
+ }
+ while (*padlen > 0)
+ {
+ dopr_outch(zpad, target);
+ --(*padlen);
+ }
+ }
+ while (*padlen > (*signvalue != 0))
+ {
+ dopr_outch(' ', target);
+ --(*padlen);
+ }
+ if (*signvalue)
+ {
+ dopr_outch(*signvalue, target);
+ if (*padlen > 0)
+ --(*padlen);
+ else if (*padlen < 0)
+ ++(*padlen);
+ }
+}
+
+
+static void
+trailing_pad(int *padlen, PrintfTarget *target)
+{
+ while (*padlen < 0)
+ {
+ dopr_outch(' ', target);
+ ++(*padlen);
+ }
+}