From 0e9959106de8e82be5a2697db1a4b0008c0bd3f5 Mon Sep 17 00:00:00 2001 From: Romain Chantereay Date: Tue, 8 Feb 2005 11:11:23 +0000 Subject: [PATCH] Added the vsnprintf function code of Patrick Powell for MS Visual C users. --- win32/msvc/vsnprintf.c | 790 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 790 insertions(+) create mode 100644 win32/msvc/vsnprintf.c diff --git a/win32/msvc/vsnprintf.c b/win32/msvc/vsnprintf.c new file mode 100644 index 00000000..2cba8f31 --- /dev/null +++ b/win32/msvc/vsnprintf.c @@ -0,0 +1,790 @@ +/* This file is NOT part of Wget, but is used by Wget on the systems + where vsnprintf() is not defined. It has been written by Patrick + Powell and modified by other people. All the copyright and other + notices have been left intact. + + My changes are documented at the bottom, along with other changes. + I hereby place my modifications to this file under the public + domain. */ + +/* + * Copyright Patrick Powell 1995 + * This code is based on code written by Patrick Powell (papowell@astart.com) + * It may be used for any purpose as long as this notice remains intact + * on all source code distributions + */ + +/************************************************************** + * 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... + * + * snprintf() is used instead of sprintf() as it does limit checks + * for string length. This covers a nasty loophole. + * + * The other functions are there to prevent NULL pointers from + * causing nast effects. + * + * More Recently: + * Brandon Long 9/15/96 for mutt 0.43 + * This was ugly. It is still ugly. I opted out of floating point + * numbers, but the formatter understands just about everything + * from the normal C string format, at least as far as I can tell from + * the Solaris 2.5 printf(3S) man page. + * + * Brandon Long 10/22/97 for mutt 0.87.1 + * Ok, added some minimal floating point support, which means this + * probably requires libm on most operating systems. Don't yet + * support the exponent (e,E) and sigfig (g,G). Also, fmtint() + * was pretty badly broken, it just wasn't being exercised in ways + * which showed it, so that's been fixed. Also, formated the code + * to mutt conventions, and removed dead code left over from the + * original. Also, there is now a builtin-test, just compile with: + * gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm + * and run snprintf for results. + * + * Thomas Roessler 01/27/98 for mutt 0.89i + * The PGP code was using unsigned hexadecimal formats. + * Unfortunately, unsigned formats simply didn't work. + * + * Michael Elkins 03/05/98 for mutt 0.90.8 + * The original code assumed that both snprintf() and vsnprintf() were + * missing. Some systems only have snprintf() but not vsnprintf(), so + * the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF. + * + * Andrew Tridgell (tridge@samba.org) Oct 1998 + * fixed handling of %.0f + * added test for HAVE_LONG_DOUBLE + * + * Russ Allbery 2000-08-26 + * fixed return value to comply with C99 + * fixed handling of snprintf(NULL, ...) + * + * Hrvoje Niksic 2000-11-04 + * include instead of "config.h". + * moved TEST_SNPRINTF stuff out of HAVE_SNPRINTF ifdef. + * include for NULL. + * added support and test cases for long long. + * don't declare argument types to (v)snprintf if stdarg is not used. + * use int instead of short int as 2nd arg to va_arg. + * + **************************************************************/ + +/* BDR 2002-01-13 %e and %g were being ignored. Now do something, + if not necessarily correctly */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) + +#include +#include +#include /* for NULL */ +#include + +/* varargs declarations: */ + +#if defined(HAVE_STDARG_H) +# include +# define HAVE_STDARGS /* let's hope that works everywhere (mj) */ +# define VA_LOCAL_DECL va_list ap +# define VA_START(f) va_start(ap, f) +# define VA_SHIFT(v,t) ; /* no-op for ANSI */ +# define VA_END va_end(ap) +#else +# include +# undef HAVE_STDARGS +# define VA_LOCAL_DECL va_list ap +# define VA_START(f) va_start(ap) /* f is ignored! */ +# define VA_SHIFT(v,t) v = va_arg(ap,t) +# define VA_END va_end(ap) +#endif + +#if (SIZEOF_LONG_DOUBLE > 0) +/* #ifdef HAVE_LONG_DOUBLE */ +#define LDOUBLE long double +#else +#define LDOUBLE double +#endif + +#if (SIZEOF_LONG_LONG > 0) +/* #ifdef HAVE_LONG_LONG */ +# define LLONG long long +#else +# define LLONG long +#endif + +#ifdef HAVE_STDARGS +int snprintf (char *str, size_t count, const char *fmt, ...); +int vsnprintf (char *str, size_t count, const char *fmt, va_list arg); +#else +int snprintf (); +int vsnprintf (); +#endif + +static int dopr (char *buffer, size_t maxlen, const char *format, + va_list args); +static int fmtstr (char *buffer, size_t *currlen, size_t maxlen, + char *value, int flags, int min, int max); +static int fmtint (char *buffer, size_t *currlen, size_t maxlen, + LLONG value, int base, int min, int max, int flags); +static int fmtfp (char *buffer, size_t *currlen, size_t maxlen, + LDOUBLE fvalue, int min, int max, int flags); +static int dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c ); + +/* + * dopr(): poor man's version of doprintf + */ + +/* format read states */ +#define DP_S_DEFAULT 0 +#define DP_S_FLAGS 1 +#define DP_S_MIN 2 +#define DP_S_DOT 3 +#define DP_S_MAX 4 +#define DP_S_MOD 5 +#define DP_S_MOD_L 6 +#define DP_S_CONV 7 +#define DP_S_DONE 8 + +/* format flags - Bits */ +#define DP_F_MINUS (1 << 0) +#define DP_F_PLUS (1 << 1) +#define DP_F_SPACE (1 << 2) +#define DP_F_NUM (1 << 3) +#define DP_F_ZERO (1 << 4) +#define DP_F_UP (1 << 5) +#define DP_F_UNSIGNED (1 << 6) + +/* Conversion Flags */ +#define DP_C_SHORT 1 +#define DP_C_LONG 2 +#define DP_C_LLONG 3 +#define DP_C_LDOUBLE 4 + +#define char_to_int(p) (p - '0') +#define MAX(p,q) ((p >= q) ? p : q) +#define MIN(p,q) ((p <= q) ? p : q) + +static int dopr (char *buffer, size_t maxlen, const char *format, va_list args) +{ + char ch; + LLONG value; + LDOUBLE fvalue; + char *strvalue; + int min; + int max; + int state; + int flags; + int cflags; + int total; + size_t currlen; + + state = DP_S_DEFAULT; + currlen = flags = cflags = min = 0; + max = -1; + ch = *format++; + total = 0; + + while (state != DP_S_DONE) + { + if (ch == '\0') + state = DP_S_DONE; + + switch(state) + { + case DP_S_DEFAULT: + if (ch == '%') + state = DP_S_FLAGS; + else + total += dopr_outch (buffer, &currlen, maxlen, ch); + ch = *format++; + break; + case DP_S_FLAGS: + switch (ch) + { + case '-': + flags |= DP_F_MINUS; + ch = *format++; + break; + case '+': + flags |= DP_F_PLUS; + ch = *format++; + break; + case ' ': + flags |= DP_F_SPACE; + ch = *format++; + break; + case '#': + flags |= DP_F_NUM; + ch = *format++; + break; + case '0': + flags |= DP_F_ZERO; + ch = *format++; + break; + default: + state = DP_S_MIN; + break; + } + break; + case DP_S_MIN: + if ('0' <= ch && ch <= '9') + { + min = 10*min + char_to_int (ch); + ch = *format++; + } + else if (ch == '*') + { + min = va_arg (args, int); + ch = *format++; + state = DP_S_DOT; + } + else + state = DP_S_DOT; + break; + case DP_S_DOT: + if (ch == '.') + { + state = DP_S_MAX; + ch = *format++; + } + else + state = DP_S_MOD; + break; + case DP_S_MAX: + if ('0' <= ch && ch <= '9') + { + if (max < 0) + max = 0; + max = 10*max + char_to_int (ch); + ch = *format++; + } + else if (ch == '*') + { + max = va_arg (args, int); + ch = *format++; + state = DP_S_MOD; + } + else + state = DP_S_MOD; + break; + case DP_S_MOD: + switch (ch) + { + case 'h': + cflags = DP_C_SHORT; + ch = *format++; + break; + case 'l': + cflags = DP_C_LONG; + ch = *format++; + break; + case 'L': + cflags = DP_C_LDOUBLE; + ch = *format++; + break; + default: + break; + } + if (cflags != DP_C_LONG) + state = DP_S_CONV; + else + state = DP_S_MOD_L; + break; + case DP_S_MOD_L: + switch (ch) + { + case 'l': + cflags = DP_C_LLONG; + ch = *format++; + break; + default: + break; + } + state = DP_S_CONV; + break; + case DP_S_CONV: + switch (ch) + { + case 'd': + case 'i': + if (cflags == DP_C_SHORT) + value = (short int)va_arg (args, int); + else if (cflags == DP_C_LONG) + value = va_arg (args, long int); + else if (cflags == DP_C_LLONG) + value = va_arg (args, LLONG); + else + value = va_arg (args, int); + total += fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); + break; + case 'o': + flags |= DP_F_UNSIGNED; + if (cflags == DP_C_SHORT) + value = (unsigned short int)va_arg (args, unsigned int); + else if (cflags == DP_C_LONG) + value = va_arg (args, unsigned long int); + else if (cflags == DP_C_LLONG) + value = va_arg (args, unsigned LLONG); + else + value = va_arg (args, unsigned int); + total += fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); + break; + case 'u': + flags |= DP_F_UNSIGNED; + if (cflags == DP_C_SHORT) + value = (unsigned short int)va_arg (args, unsigned int); + else if (cflags == DP_C_LONG) + value = va_arg (args, unsigned long int); + else if (cflags == DP_C_LLONG) + value = va_arg (args, unsigned LLONG); + else + value = va_arg (args, unsigned int); + total += fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); + break; + case 'X': + flags |= DP_F_UP; + case 'x': + flags |= DP_F_UNSIGNED; + if (cflags == DP_C_SHORT) + value = (unsigned short int)va_arg (args, unsigned int); + else if (cflags == DP_C_LONG) + value = va_arg (args, unsigned long int); + else if (cflags == DP_C_LLONG) + value = va_arg (args, unsigned LLONG); + else + value = va_arg (args, unsigned int); + total += fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); + break; + case 'f': + if (cflags == DP_C_LDOUBLE) + fvalue = va_arg (args, LDOUBLE); + else + fvalue = va_arg (args, double); + /* um, floating point? */ + total += fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); + break; + case 'E': + flags |= DP_F_UP; + case 'e': + if (cflags == DP_C_LDOUBLE) + fvalue = va_arg (args, LDOUBLE); + else + fvalue = va_arg (args, double); + /* um, floating point? */ + total += fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); + break; + case 'G': + flags |= DP_F_UP; + case 'g': + if (cflags == DP_C_LDOUBLE) + fvalue = va_arg (args, LDOUBLE); + else + fvalue = va_arg (args, double); + /* um, floating point? */ + total += fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); + break; + case 'c': + total += dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); + break; + case 's': + strvalue = va_arg (args, char *); + total += fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); + break; + case 'p': + strvalue = va_arg (args, void *); + total += fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, + max, flags); + break; + case 'n': + if (cflags == DP_C_SHORT) + { + short int *num; + num = va_arg (args, short int *); + *num = currlen; + } + else if (cflags == DP_C_LONG) + { + long int *num; + num = va_arg (args, long int *); + *num = currlen; + } + else if (cflags == DP_C_LLONG) + { + LLONG *num; + num = va_arg (args, LLONG *); + *num = currlen; + } + else + { + int *num; + num = va_arg (args, int *); + *num = currlen; + } + break; + case '%': + total += dopr_outch (buffer, &currlen, maxlen, ch); + break; + case 'w': + /* not supported yet, treat as next char */ + ch = *format++; + break; + default: + /* Unknown, skip */ + break; + } + ch = *format++; + state = DP_S_DEFAULT; + flags = cflags = min = 0; + max = -1; + break; + case DP_S_DONE: + break; + default: + /* hmm? */ + break; /* some picky compilers need this */ + } + } + if (buffer != NULL) + { + if (currlen < maxlen - 1) + buffer[currlen] = '\0'; + else + buffer[maxlen - 1] = '\0'; + } + return total; +} + +static int fmtstr (char *buffer, size_t *currlen, size_t maxlen, + char *value, int flags, int min, int max) +{ + int padlen, strln; /* amount to pad */ + int cnt = 0; + int total = 0; + + if (value == 0) + { + value = ""; + } + + for (strln = 0; value[strln]; ++strln); /* strlen */ + if (max >= 0 && max < strln) + strln = max; + padlen = min - strln; + if (padlen < 0) + padlen = 0; + if (flags & DP_F_MINUS) + padlen = -padlen; /* Left Justify */ + + while (padlen > 0) + { + total += dopr_outch (buffer, currlen, maxlen, ' '); + --padlen; + } + while (*value && ((max < 0) || (cnt < max))) + { + total += dopr_outch (buffer, currlen, maxlen, *value++); + ++cnt; + } + while (padlen < 0) + { + total += dopr_outch (buffer, currlen, maxlen, ' '); + ++padlen; + } + return total; +} + +/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ + +static int fmtint (char *buffer, size_t *currlen, size_t maxlen, + LLONG value, int base, int min, int max, int flags) +{ + int signvalue = 0; + unsigned LLONG uvalue; + char convert[24]; + int place = 0; + int spadlen = 0; /* amount to space pad */ + int zpadlen = 0; /* amount to zero pad */ + const char *digits; + int total = 0; + + if (max < 0) + max = 0; + + uvalue = value; + + if(!(flags & DP_F_UNSIGNED)) + { + if( value < 0 ) { + signvalue = '-'; + uvalue = -value; + } + else + if (flags & DP_F_PLUS) /* Do a sign (+/i) */ + signvalue = '+'; + else + if (flags & DP_F_SPACE) + signvalue = ' '; + } + + if (flags & DP_F_UP) + /* Should characters be upper case? */ + digits = "0123456789ABCDEF"; + else + digits = "0123456789abcdef"; + + do { + convert[place++] = digits[uvalue % (unsigned)base]; + uvalue = (uvalue / (unsigned)base ); + } while(uvalue && (place < sizeof (convert))); + if (place == sizeof (convert)) place--; + convert[place] = 0; + + zpadlen = max - place; + spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); + if (zpadlen < 0) zpadlen = 0; + if (spadlen < 0) spadlen = 0; + if (flags & DP_F_ZERO) + { + zpadlen = MAX(zpadlen, spadlen); + spadlen = 0; + } + if (flags & DP_F_MINUS) + spadlen = -spadlen; /* Left Justifty */ + +#ifdef DEBUG_SNPRINTF + dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", + zpadlen, spadlen, min, max, place)); +#endif + + /* Spaces */ + while (spadlen > 0) + { + total += dopr_outch (buffer, currlen, maxlen, ' '); + --spadlen; + } + + /* Sign */ + if (signvalue) + total += dopr_outch (buffer, currlen, maxlen, signvalue); + + /* Zeros */ + if (zpadlen > 0) + { + while (zpadlen > 0) + { + total += dopr_outch (buffer, currlen, maxlen, '0'); + --zpadlen; + } + } + + /* Digits */ + while (place > 0) + total += dopr_outch (buffer, currlen, maxlen, convert[--place]); + + /* Left Justified spaces */ + while (spadlen < 0) { + total += dopr_outch (buffer, currlen, maxlen, ' '); + ++spadlen; + } + + return total; +} + +static LDOUBLE abs_val (LDOUBLE value) +{ + LDOUBLE result = value; + + if (value < 0) + result = -value; + + return result; +} + +static LDOUBLE pow10 (int exp) +{ + LDOUBLE result = 1; + + while (exp) + { + result *= 10; + exp--; + } + + return result; +} + +static long round (LDOUBLE value) +{ + long intpart; + + intpart = value; + value = value - intpart; + if (value >= 0.5) + intpart++; + + return intpart; +} + +static int fmtfp (char *buffer, size_t *currlen, size_t maxlen, + LDOUBLE fvalue, int min, int max, int flags) +{ + int signvalue = 0; + LDOUBLE ufvalue; + char iconvert[20]; + char fconvert[20]; + int iplace = 0; + int fplace = 0; + int padlen = 0; /* amount to pad */ + int zpadlen = 0; + int caps = 0; + int total = 0; + long intpart; + long fracpart; + + /* + * AIX manpage says the default is 0, but Solaris says the default + * is 6, and sprintf on AIX defaults to 6 + */ + if (max < 0) + max = 6; + + ufvalue = abs_val (fvalue); + + if (fvalue < 0) + signvalue = '-'; + else + if (flags & DP_F_PLUS) /* Do a sign (+/i) */ + signvalue = '+'; + else + if (flags & DP_F_SPACE) + signvalue = ' '; + +#if 0 + if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ +#endif + + intpart = ufvalue; + + /* + * Sorry, we only support 9 digits past the decimal because of our + * conversion method + */ + if (max > 9) + max = 9; + + /* We "cheat" by converting the fractional part to integer by + * multiplying by a factor of 10 + */ + fracpart = round ((pow10 (max)) * (ufvalue - intpart)); + + if (fracpart >= pow10 (max)) + { + intpart++; + fracpart -= pow10 (max); + } + +#ifdef DEBUG_SNPRINTF + dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart)); +#endif + + /* Convert integer part */ + do { + iconvert[iplace++] = + (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10]; + intpart = (intpart / 10); + } while(intpart && (iplace < 20)); + if (iplace == 20) iplace--; + iconvert[iplace] = 0; + + /* Convert fractional part */ + do { + fconvert[fplace++] = + (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10]; + fracpart = (fracpart / 10); + } while(fracpart && (fplace < 20)); + if (fplace == 20) fplace--; + fconvert[fplace] = 0; + + /* -1 for decimal point, another -1 if we are printing a sign */ + padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); + zpadlen = max - fplace; + if (zpadlen < 0) + zpadlen = 0; + if (padlen < 0) + padlen = 0; + if (flags & DP_F_MINUS) + padlen = -padlen; /* Left Justifty */ + + if ((flags & DP_F_ZERO) && (padlen > 0)) + { + if (signvalue) + { + total += dopr_outch (buffer, currlen, maxlen, signvalue); + --padlen; + signvalue = 0; + } + while (padlen > 0) + { + total += dopr_outch (buffer, currlen, maxlen, '0'); + --padlen; + } + } + while (padlen > 0) + { + total += dopr_outch (buffer, currlen, maxlen, ' '); + --padlen; + } + if (signvalue) + total += dopr_outch (buffer, currlen, maxlen, signvalue); + + while (iplace > 0) + total += dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]); + + /* + * Decimal point. This should probably use locale to find the correct + * char to print out. + */ + if (max > 0) + { + total += dopr_outch (buffer, currlen, maxlen, '.'); + + while (zpadlen-- > 0) + total += dopr_outch (buffer, currlen, maxlen, '0'); + + while (fplace > 0) + total += dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]); + } + + while (padlen < 0) + { + total += dopr_outch (buffer, currlen, maxlen, ' '); + ++padlen; + } + + return total; +} + +static int dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c) +{ + if (*currlen + 1 < maxlen) + buffer[(*currlen)++] = c; + return 1; +} + +#ifndef HAVE_VSNPRINTF +int vsnprintf (char *str, size_t count, const char *fmt, va_list args) +{ + if (str != NULL) + str[0] = 0; + return dopr(str, count, fmt, args); +} +#endif /* !HAVE_VSNPRINTF */ + +#endif /* !HAVE_SNPRINTF || !HAVE_VSNPRINTF */ +