/*- * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Chris Torek. * * 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. */ /* * IMPORTANT NOTE: * -------------- * From ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change * paragraph 3 above is now null and void. */ /* SNPRINTF.C * fjc 7-31-97 Modified by Mib Software to be a standalone snprintf.c module. * http://www.mibsoftware.com * Mib Software does not warrant this software any differently than the * University of California, Berkeley as described above. All warranties * are disclaimed. Use this software at your own risk. * * All code referencing FILE * functions was eliminated, since it could * never be called. All header files and necessary files are collapsed * into one file, internal functions are declared static. This should * allow inclusion into libraries with less chance of namespace collisions. * * snprintf should be the only externally visible item. * * As of 7-31-97 FLOATING_POINT is NOT provided. The code is somewhat * non-portable, so it is disabled. */ /* Define FLOATING_POINT to get floating point. */ /* #define FLOATING_POINT */ #include #define u_long unsigned long #define u_short unsigned short #define u_int unsigned int #if !defined(HAVE_STDARG_PROTOTYPES) #if defined(__STDC__) #define HAVE_STDARG_PROTOTYPES 1 #endif #endif #undef __P #if defined(HAVE_STDARG_PROTOTYPES) # include # if !defined(__P) # define __P(x) x # endif #else # define __P(x) () # if !defined(const) # define const # endif # include #endif #ifndef _BSD_VA_LIST_ #define _BSD_VA_LIST_ va_list #endif #ifdef __STDC__ # include #else # ifndef LONG_MAX # ifdef HAVE_LIMITS_H # include # else /* assuming 32bit(2's complement) long */ # define LONG_MAX 2147483647 # endif # endif #endif #if defined(__hpux) && !defined(__GNUC__) && !defined(__STDC__) #define const #endif #if defined(sgi) #undef __const #define __const #endif /* People who don't like const sys_error */ #include #if defined(__hpux) && !defined(__GNUC__) || defined(__DECC) #include #endif #if !defined(__CYGWIN32__) && defined(__hpux) && !defined(__GNUC__) #include #endif #ifndef NULL #define NULL 0 #endif #if SIZEOF_LONG > SIZEOF_INT # include #endif /* * NB: to fit things in six character monocase externals, the stdio * code uses the prefix `__s' for stdio objects, typically followed * by a three-character attempt at a mnemonic. */ /* stdio buffers */ struct __sbuf { unsigned char *_base; size_t _size; }; /* * stdio state variables. * * The following always hold: * * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), * _lbfsize is -_bf._size, else _lbfsize is 0 * if _flags&__SRD, _w is 0 * if _flags&__SWR, _r is 0 * * This ensures that the getc and putc macros (or inline functions) never * try to write or read from a file that is in `read' or `write' mode. * (Moreover, they can, and do, automatically switch from read mode to * write mode, and back, on "r+" and "w+" files.) * * _lbfsize is used only to make the inline line-buffered output stream * code as compact as possible. * * _ub, _up, and _ur are used when ungetc() pushes back more characters * than fit in the current _bf, or when ungetc() pushes back a character * that does not match the previous one in _bf. When this happens, * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. * * NB: see WARNING above before changing the layout of this structure! */ typedef struct __sFILE { unsigned char *_p; /* current position in (some) buffer */ #if 0 size_t _r; /* read space left for getc() */ #endif size_t _w; /* write space left for putc() */ short _flags; /* flags, below; this FILE is free if 0 */ short _file; /* fileno, if Unix descriptor, else -1 */ struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ size_t _lbfsize; /* 0 or -_bf._size, for inline putc */ int (*vwrite)(/* struct __sFILE*, struct __suio * */); char *(*vextra)(/* struct __sFILE*, size_t, void*, long*, int */); } FILE; #define __SLBF 0x0001 /* line buffered */ #define __SNBF 0x0002 /* unbuffered */ #define __SRD 0x0004 /* OK to read */ #define __SWR 0x0008 /* OK to write */ /* RD and WR are never simultaneously asserted */ #define __SRW 0x0010 /* open for reading & writing */ #define __SEOF 0x0020 /* found EOF */ #define __SERR 0x0040 /* found error */ #define __SMBF 0x0080 /* _buf is from malloc */ #define __SAPP 0x0100 /* fdopen()ed in append mode */ #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ #define __SOPT 0x0400 /* do fseek() optimisation */ #define __SNPT 0x0800 /* do not do fseek() optimisation */ #define __SOFF 0x1000 /* set iff _offset is in fact correct */ #define __SMOD 0x2000 /* true => fgetln modified _p text */ #define EOF (-1) #define BSD__sfeof(p) (((p)->_flags & __SEOF) != 0) #define BSD__sferror(p) (((p)->_flags & __SERR) != 0) #define BSD__sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) #define BSD__sfileno(p) ((p)->_file) #undef feof #undef ferror #undef clearerr #define feof(p) BSD__sfeof(p) #define ferror(p) BSD__sferror(p) #define clearerr(p) BSD__sclearerr(p) #ifndef _ANSI_SOURCE #define fileno(p) BSD__sfileno(p) #endif /* * I/O descriptors for __sfvwrite(). */ struct __siov { const void *iov_base; size_t iov_len; }; struct __suio { struct __siov *uio_iov; int uio_iovcnt; size_t uio_resid; }; /* * Write some memory regions. Return zero on success, EOF on error. * * This routine is large and unsightly, but most of the ugliness due * to the three different kinds of output buffering is handled here. */ static int BSD__sfvwrite(register FILE *fp, register struct __suio *uio) { register size_t len; register const char *p; register struct __siov *iov; register size_t w; if ((len = uio->uio_resid) == 0) return (0); #ifndef __hpux #define MIN(a, b) ((a) < (b) ? (a) : (b)) #endif #define COPY(n) (void)memcpy((void *)fp->_p, (void *)p, (size_t)(n)) iov = uio->uio_iov; p = iov->iov_base; len = iov->iov_len; iov++; #define GETIOV(extra_work) \ while (len == 0) { \ extra_work; \ p = iov->iov_base; \ len = iov->iov_len; \ iov++; \ } if (fp->_flags & __SNBF) { /* fjc 7-31-97 Will never happen. We are working with strings only */ } else if ((fp->_flags & __SLBF) == 0) { /* * Fully buffered: fill partially full buffer, if any, * and then flush. If there is no partial buffer, write * one _bf._size byte chunk directly (without copying). * * String output is a special case: write as many bytes * as fit, but pretend we wrote everything. This makes * snprintf() return the number of bytes needed, rather * than the number used, and avoids its write function * (so that the write function can be invalid). */ do { GETIOV(;); w = fp->_w; if (fp->_flags & __SSTR) { if (len < w) w = len; COPY(w); /* copy MIN(fp->_w,len), */ fp->_w -= w; fp->_p += w; w = len; /* but pretend copied all */ } else { /* fjc 7-31-97 Will never happen. We are working with strings only */ } p += w; len -= w; } while ((uio->uio_resid -= w) != 0); } else { /* fjc 7-31-97 Will never happen. We are working with strings only */ } return (0); } /* * Actual printf innards. * * This code is large and complicated... */ /* * Flush out all the vectors defined by the given uio, * then reset it so that it can be reused. */ static int BSD__sprint(FILE *fp, register struct __suio *uio) { register int err; if (uio->uio_resid == 0) { uio->uio_iovcnt = 0; return (0); } err = (*fp->vwrite)(fp, uio); uio->uio_resid = 0; uio->uio_iovcnt = 0; return (err); } /* * Helper function for `fprintf to unbuffered unix file': creates a * temporary buffer. We only work on write-only files; this avoids * worries about ungetc buffers and so forth. */ static int BSD__sbprintf(register FILE *fp, const char *fmt, va_list ap) { /* We don't support files. */ return 0; } /* * Macros for converting digits to letters and vice versa */ #define to_digit(c) ((c) - '0') #define is_digit(c) ((unsigned)to_digit(c) <= 9) #define to_char(n) (char)((n) + '0') #ifdef _HAVE_SANE_QUAD_ /* * Convert an unsigned long long to ASCII for printf purposes, returning * a pointer to the first character of the string representation. * Octal numbers can be forced to have a leading zero; hex numbers * use the given digits. */ static char * BSD__uqtoa(register u_quad_t val, char *endp, int base, int octzero, const char *xdigs) { register char *cp = endp; register quad_t sval; /* * Handle the three cases separately, in the hope of getting * better/faster code. */ switch (base) { case 10: if (val < 10) { /* many numbers are 1 digit */ *--cp = to_char(val); return (cp); } /* * On many machines, unsigned arithmetic is harder than * signed arithmetic, so we do at most one unsigned mod and * divide; this is sufficient to reduce the range of * the incoming value to where signed arithmetic works. */ if (val > LLONG_MAX) { *--cp = to_char(val % 10); sval = val / 10; } else sval = val; do { *--cp = to_char(sval % 10); sval /= 10; } while (sval != 0); break; case 8: do { *--cp = to_char(val & 7); val >>= 3; } while (val); if (octzero && *cp != '0') *--cp = '0'; break; case 16: do { *--cp = xdigs[val & 15]; val >>= 4; } while (val); break; default: /* oops */ /* abort(); */ break; /* fjc 7-31-97. Don't reference abort() here */ } return (cp); } #endif /* _HAVE_SANE_QUAD_ */ /* * Convert an unsigned long to ASCII for printf purposes, returning * a pointer to the first character of the string representation. * Octal numbers can be forced to have a leading zero; hex numbers * use the given digits. */ static char * BSD__ultoa(register u_long val, char *endp, int base, int octzero, const char *xdigs) { register char *cp = endp; register long sval; /* * Handle the three cases separately, in the hope of getting * better/faster code. */ switch (base) { case 10: if (val < 10) { /* many numbers are 1 digit */ *--cp = to_char(val); return (cp); } /* * On many machines, unsigned arithmetic is harder than * signed arithmetic, so we do at most one unsigned mod and * divide; this is sufficient to reduce the range of * the incoming value to where signed arithmetic works. */ if (val > LONG_MAX) { *--cp = to_char(val % 10); sval = val / 10; } else sval = val; do { *--cp = to_char(sval % 10); sval /= 10; } while (sval != 0); break; case 8: do { *--cp = to_char(val & 7); val >>= 3; } while (val); if (octzero && *cp != '0') *--cp = '0'; break; case 16: do { *--cp = xdigs[val & 15]; val >>= 4; } while (val); break; default: /* oops */ /* abort(); */ break; /* fjc 7-31-97. Don't reference abort() here */ } return (cp); } #ifdef FLOATING_POINT #include #include /* #include "floatio.h" */ #ifndef MAXEXP # if DBL_MAX_10_EXP > -DBL_MIN_10_EXP # define MAXEXP (DBL_MAX_10_EXP) # else # define MAXEXP (-DBL_MIN_10_EXP) # endif #endif #ifndef MAXFRACT # define MAXFRACT (MAXEXP*10/3) #endif #define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */ #define DEFPREC 6 static char *cvt(double, int, int, char *, int *, int, int *, char *); static int exponent(char *, int, int); #else /* no FLOATING_POINT */ #define BUF 68 #endif /* FLOATING_POINT */ /* * Flags used during conversion. */ #define ALT 0x001 /* alternate form */ #define HEXPREFIX 0x002 /* add 0x or 0X prefix */ #define LADJUST 0x004 /* left adjustment */ #define LONGDBL 0x008 /* long double; unimplemented */ #define LONGINT 0x010 /* long integer */ #ifdef _HAVE_SANE_QUAD_ #define QUADINT 0x020 /* quad integer */ #endif /* _HAVE_SANE_QUAD_ */ #define SHORTINT 0x040 /* short integer */ #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */ #define FPT 0x100 /* Floating point number */ static ssize_t BSD_vfprintf(FILE *fp, const char *fmt0, va_list ap) { register const char *fmt; /* format string */ register int ch; /* character from fmt */ register int n; /* handy integer (short term usage) */ register const char *cp;/* handy char pointer (short term usage) */ register struct __siov *iovp;/* for PRINT macro */ register int flags; /* flags as above */ ssize_t ret; /* return value accumulator */ int width; /* width from format (%8d), or 0 */ int prec; /* precision from format (%.3d), or -1 */ char sign; /* sign prefix (' ', '+', '-', or \0) */ #ifdef FLOATING_POINT char softsign; /* temporary negative sign for floats */ double _double = 0; /* double precision arguments %[eEfgG] */ int expt; /* integer value of exponent */ int expsize = 0; /* character count for expstr */ int ndig = 0; /* actual number of digits returned by cvt */ int fprec = 0; /* floating point precision */ char expstr[7]; /* buffer for exponent string */ #endif u_long UNINITIALIZED_VAR(ulval); /* integer arguments %[diouxX] */ #ifdef _HAVE_SANE_QUAD_ u_quad_t UNINITIALIZED_VAR(uqval); /* %q integers */ #endif /* _HAVE_SANE_QUAD_ */ int base; /* base for [diouxX] conversion */ int dprec; /* a copy of prec if [diouxX], 0 otherwise */ long fieldsz; /* field size expanded by sign, etc */ long realsz; /* field size expanded by dprec */ int size; /* size of converted field or string */ const char *xdigs = 0; /* digits for [xX] conversion */ #define NIOV 8 struct __suio uio; /* output information: summary */ struct __siov iov[NIOV];/* ... and individual io vectors */ char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */ char ox[4]; /* space for 0x hex-prefix, hexadecimal's 1. */ char *const ebuf = buf + sizeof(buf); #if SIZEOF_LONG > SIZEOF_INT long ln; #endif /* * Choose PADSIZE to trade efficiency vs. size. If larger printf * fields occur frequently, increase PADSIZE and make the initializers * below longer. */ #define PADSIZE 16 /* pad chunk size */ static const char blanks[PADSIZE] = {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; static const char zeroes[PADSIZE] = {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; /* * BEWARE, these `goto error' on error, and PAD uses `n'. */ #define PRINT(ptr, len) { \ iovp->iov_base = (ptr); \ iovp->iov_len = (len); \ uio.uio_resid += (len); \ iovp++; \ if (++uio.uio_iovcnt >= NIOV) { \ if (BSD__sprint(fp, &uio)) \ goto error; \ iovp = iov; \ } \ } #define PAD(howmany, with) { \ if ((n = (howmany)) > 0) { \ while (n > PADSIZE) { \ PRINT((with), PADSIZE); \ n -= PADSIZE; \ } \ PRINT((with), n); \ } \ } #if SIZEOF_LONG > SIZEOF_INT /* abandon if too larger padding */ #define PAD_L(howmany, with) { \ ln = (howmany); \ if ((long)((int)ln) != ln) { \ errno = ENOMEM; \ goto error; \ } \ if (ln > 0) PAD((int)ln, (with)); \ } #else #define PAD_L(howmany, with) PAD((howmany), (with)) #endif #define FLUSH() { \ if (uio.uio_resid && BSD__sprint(fp, &uio)) \ goto error; \ uio.uio_iovcnt = 0; \ iovp = iov; \ } /* * To extend shorts properly, we need both signed and unsigned * argument extraction methods. */ #define SARG() \ (flags&LONGINT ? va_arg(ap, long) : \ flags&SHORTINT ? (long)(short)va_arg(ap, int) : \ (long)va_arg(ap, int)) #define UARG() \ (flags&LONGINT ? va_arg(ap, u_long) : \ flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \ (u_long)va_arg(ap, u_int)) /* optimise fprintf(stderr) (and other unbuffered Unix files) */ if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && fp->_file >= 0) return (BSD__sbprintf(fp, fmt0, ap)); fmt = fmt0; uio.uio_iov = iovp = iov; uio.uio_resid = 0; uio.uio_iovcnt = 0; ret = 0; xdigs = 0; /* * Scan the format for conversions (`%' character). */ for (;;) { size_t nc; for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) /* void */; if ((nc = fmt - cp) != 0) { PRINT(cp, nc); ret += nc; } if (ch == '\0') goto done; fmt++; /* skip over '%' */ flags = 0; dprec = 0; width = 0; prec = -1; sign = '\0'; rflag: ch = *fmt++; reswitch: switch (ch) { case ' ': /* * ``If the space and + flags both appear, the space * flag will be ignored.'' * -- ANSI X3J11 */ if (!sign) sign = ' '; goto rflag; case '#': flags |= ALT; goto rflag; case '*': /* * ``A negative field width argument is taken as a * - flag followed by a positive field width.'' * -- ANSI X3J11 * They don't exclude field widths read from args. */ if ((width = va_arg(ap, int)) >= 0) goto rflag; width = -width; /* FALLTHROUGH */ case '-': flags |= LADJUST; goto rflag; case '+': sign = '+'; goto rflag; case '.': if ((ch = *fmt++) == '*') { n = va_arg(ap, int); prec = n < 0 ? -1 : n; goto rflag; } n = 0; while (is_digit(ch)) { n = 10 * n + to_digit(ch); ch = *fmt++; } prec = n < 0 ? -1 : n; goto reswitch; case '0': /* * ``Note that 0 is taken as a flag, not as the * beginning of a field width.'' * -- ANSI X3J11 */ flags |= ZEROPAD; goto rflag; case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': n = 0; do { n = 10 * n + to_digit(ch); ch = *fmt++; } while (is_digit(ch)); width = n; goto reswitch; #ifdef FLOATING_POINT case 'L': flags |= LONGDBL; goto rflag; #endif case 'h': flags |= SHORTINT; goto rflag; #if SIZEOF_PTRDIFF_T == SIZEOF_LONG case 't': #endif #if SIZEOF_SIZE_T == SIZEOF_LONG case 'z': #endif case 'l': #ifdef _HAVE_SANE_QUAD_ if (*fmt == 'l') { fmt++; flags |= QUADINT; } else { flags |= LONGINT; } #else flags |= LONGINT; #endif goto rflag; #ifdef _HAVE_SANE_QUAD_ #if SIZEOF_PTRDIFF_T == SIZEOF_LONG_LONG case 't': #endif #if SIZEOF_SIZE_T == SIZEOF_LONG_LONG case 'z': #endif case 'q': flags |= QUADINT; goto rflag; #endif /* _HAVE_SANE_QUAD_ */ #ifdef _WIN32 case 'I': if (*fmt == '3' && *(fmt + 1) == '2') { fmt += 2; flags |= LONGINT; } #ifdef _HAVE_SANE_QUAD_ else if (*fmt == '6' && *(fmt + 1) == '4') { fmt += 2; flags |= QUADINT; } #endif else #if defined(_HAVE_SANE_QUAD_) && SIZEOF_SIZE_T == SIZEOF_LONG_LONG flags |= QUADINT; #else flags |= LONGINT; #endif goto rflag; #endif case 'c': cp = buf; *buf = (char)va_arg(ap, int); size = 1; sign = '\0'; break; case 'i': #ifdef _HAVE_SANE_QUAD_ # define INTPTR_MASK (QUADINT|LONGINT|SHORTINT) #else # define INTPTR_MASK (LONGINT|SHORTINT) #endif #if defined _HAVE_SANE_QUAD_ && SIZEOF_VOIDP == SIZEOF_LONG_LONG # define INTPTR_FLAG QUADINT #elif SIZEOF_VOIDP == SIZEOF_LONG # define INTPTR_FLAG LONGINT #else # define INTPTR_FLAG 0 #endif if (fp->vextra && (flags & INTPTR_MASK) == INTPTR_FLAG) { FLUSH(); #if defined _HAVE_SANE_QUAD_ && SIZEOF_VOIDP == SIZEOF_LONG_LONG uqval = va_arg(ap, u_quad_t); cp = (*fp->vextra)(fp, sizeof(uqval), &uqval, &fieldsz, sign); #else ulval = va_arg(ap, u_long); cp = (*fp->vextra)(fp, sizeof(ulval), &ulval, &fieldsz, sign); #endif sign = '\0'; if (!cp) goto error; if (prec < 0) goto long_len; size = fieldsz < prec ? (int)fieldsz : prec; break; } goto decimal; case 'D': flags |= LONGINT; /*FALLTHROUGH*/ case 'd': decimal: #ifdef _HAVE_SANE_QUAD_ if (flags & QUADINT) { uqval = va_arg(ap, quad_t); if ((quad_t)uqval < 0) { uqval = -(quad_t)uqval; sign = '-'; } } else #endif /* _HAVE_SANE_QUAD_ */ { ulval = SARG(); if ((long)ulval < 0) { ulval = (u_long)(-(long)ulval); sign = '-'; } } base = 10; goto number; #ifdef FLOATING_POINT case 'a': case 'A': if (prec > 0) { flags |= ALT; prec++; fprec = prec; } goto fp_begin; case 'e': /* anomalous precision */ case 'E': if (prec != 0) flags |= ALT; prec = (prec == -1) ? DEFPREC + 1 : (fprec = prec + 1); /* FALLTHROUGH */ goto fp_begin; case 'f': /* always print trailing zeroes */ if (prec != 0) flags |= ALT; case 'g': case 'G': if (prec == -1) prec = DEFPREC; else fprec = prec; fp_begin: _double = va_arg(ap, double); /* do this before tricky precision changes */ if (isinf(_double)) { if (_double < 0) sign = '-'; cp = "Inf"; size = 3; break; } if (isnan(_double)) { cp = "NaN"; size = 3; break; } flags |= FPT; cp = cvt(_double, (prec < MAXFRACT ? prec : MAXFRACT), flags, &softsign, &expt, ch, &ndig, buf); if (ch == 'g' || ch == 'G') { if (expt <= -4 || (expt > prec && expt > 1)) ch = (ch == 'g') ? 'e' : 'E'; else ch = 'g'; } if (ch == 'a' || ch == 'A') { flags |= HEXPREFIX; --expt; expsize = exponent(expstr, expt, ch + 'p' - 'a'); ch += 'x' - 'a'; size = expsize + ndig; if (ndig > 1 || flags & ALT) ++size; /* floating point */ } else if (ch <= 'e') { /* 'e' or 'E' fmt */ --expt; expsize = exponent(expstr, expt, ch); size = expsize + ndig; if (ndig > 1 || flags & ALT) ++fprec, ++size; } else if (ch == 'f') { /* f fmt */ if (expt > 0) { size = expt; if (prec || flags & ALT) size += prec + 1; } else if (!prec) { /* "0" */ size = 1; if (flags & ALT) size += 1; } else /* "0.X" */ size = prec + 2; } else if (expt >= ndig) { /* fixed g fmt */ size = expt; if (flags & ALT) ++size; } else size = ndig + (expt > 0 ? 1 : 2 - expt); if (softsign) sign = '-'; break; #endif /* FLOATING_POINT */ case 'n': #ifdef _HAVE_SANE_QUAD_ if (flags & QUADINT) *va_arg(ap, quad_t *) = ret; else if (flags & LONGINT) #else /* _HAVE_SANE_QUAD_ */ if (flags & LONGINT) #endif /* _HAVE_SANE_QUAD_ */ *va_arg(ap, long *) = ret; else if (flags & SHORTINT) *va_arg(ap, short *) = (short)ret; else *va_arg(ap, int *) = (int)ret; continue; /* no output */ case 'O': flags |= LONGINT; /*FALLTHROUGH*/ case 'o': #ifdef _HAVE_SANE_QUAD_ if (flags & QUADINT) uqval = va_arg(ap, u_quad_t); else #endif /* _HAVE_SANE_QUAD_ */ ulval = UARG(); base = 8; goto nosign; case 'p': /* * ``The argument shall be a pointer to void. The * value of the pointer is converted to a sequence * of printable characters, in an implementation- * defined manner.'' * -- ANSI X3J11 */ prec = (int)(sizeof(void*)*CHAR_BIT/4); #ifdef _HAVE_LLP64_ uqval = (u_quad_t)va_arg(ap, void *); flags = (flags) | QUADINT | HEXPREFIX; #else ulval = (u_long)va_arg(ap, void *); #ifdef _HAVE_SANE_QUAD_ flags = (flags & ~QUADINT) | HEXPREFIX; #else /* _HAVE_SANE_QUAD_ */ flags = (flags) | HEXPREFIX; #endif /* _HAVE_SANE_QUAD_ */ #endif base = 16; xdigs = "0123456789abcdef"; ch = 'x'; goto nosign; case 's': if ((cp = va_arg(ap, char *)) == NULL) cp = "(null)"; if (prec >= 0) { /* * can't use strlen; can only look for the * NUL in the first `prec' characters, and * strlen() will go further. */ const char *p = (char *)memchr(cp, 0, prec); if (p != NULL && (p - cp) < prec) size = (int)(p - cp); else size = prec; } else { fieldsz = strlen(cp); goto long_len; } sign = '\0'; break; case 'U': flags |= LONGINT; /*FALLTHROUGH*/ case 'u': #ifdef _HAVE_SANE_QUAD_ if (flags & QUADINT) uqval = va_arg(ap, u_quad_t); else #endif /* _HAVE_SANE_QUAD_ */ ulval = UARG(); base = 10; goto nosign; case 'X': xdigs = "0123456789ABCDEF"; goto hex; case 'x': xdigs = "0123456789abcdef"; hex: #ifdef _HAVE_SANE_QUAD_ if (flags & QUADINT) uqval = va_arg(ap, u_quad_t); else #endif /* _HAVE_SANE_QUAD_ */ ulval = UARG(); base = 16; /* leading 0x/X only if non-zero */ if (flags & ALT && #ifdef _HAVE_SANE_QUAD_ (flags & QUADINT ? uqval != 0 : ulval != 0) #else /* _HAVE_SANE_QUAD_ */ ulval != 0 #endif /* _HAVE_SANE_QUAD_ */ ) flags |= HEXPREFIX; /* unsigned conversions */ nosign: sign = '\0'; /* * ``... diouXx conversions ... if a precision is * specified, the 0 flag will be ignored.'' * -- ANSI X3J11 */ number: if ((dprec = prec) >= 0) flags &= ~ZEROPAD; /* * ``The result of converting a zero value with an * explicit precision of zero is no characters.'' * -- ANSI X3J11 */ cp = ebuf; #ifdef _HAVE_SANE_QUAD_ if (flags & QUADINT) { if (uqval != 0 || prec != 0) cp = BSD__uqtoa(uqval, ebuf, base, flags & ALT, xdigs); } else #else /* _HAVE_SANE_QUAD_ */ #endif /* _HAVE_SANE_QUAD_ */ { if (ulval != 0 || prec != 0) cp = BSD__ultoa(ulval, ebuf, base, flags & ALT, xdigs); } size = (int)(ebuf - cp); break; default: /* "%?" prints ?, unless ? is NUL */ if (ch == '\0') goto done; /* pretend it was %c with argument ch */ cp = buf; *buf = ch; size = 1; sign = '\0'; break; } /* * All reasonable formats wind up here. At this point, `cp' * points to a string which (if not flags&LADJUST) should be * padded out to `width' places. If flags&ZEROPAD, it should * first be prefixed by any sign or other prefix; otherwise, * it should be blank padded before the prefix is emitted. * After any left-hand padding and prefixing, emit zeroes * required by a decimal [diouxX] precision, then print the * string proper, then emit zeroes required by any leftover * floating precision; finally, if LADJUST, pad with blanks. * * Compute actual size, so we know how much to pad. * fieldsz excludes decimal prec; realsz includes it. */ fieldsz = size; long_len: if (sign) fieldsz++; if (flags & HEXPREFIX) fieldsz += 2; realsz = dprec > fieldsz ? dprec : fieldsz; /* right-adjusting blank padding */ if ((flags & (LADJUST|ZEROPAD)) == 0) PAD_L(width - realsz, blanks); /* prefix */ if (sign) { PRINT(&sign, 1); } if (flags & HEXPREFIX) { ox[0] = '0'; ox[1] = ch; PRINT(ox, 2); } /* right-adjusting zero padding */ if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) PAD_L(width - realsz, zeroes); /* leading zeroes from decimal precision */ PAD_L(dprec - fieldsz, zeroes); if (sign) fieldsz--; if (flags & HEXPREFIX) fieldsz -= 2; /* the string or number proper */ #ifdef FLOATING_POINT if ((flags & FPT) == 0) { PRINT(cp, fieldsz); } else { /* glue together f_p fragments */ if (flags & HEXPREFIX) { if (ndig > 1 || flags & ALT) { ox[2] = *cp++; ox[3] = '.'; PRINT(ox+2, 2); if (ndig > 0) PRINT(cp, ndig-1); } else /* XpYYY */ PRINT(cp, 1); PAD(fprec-ndig, zeroes); PRINT(expstr, expsize); } else if (ch >= 'f') { /* 'f' or 'g' */ if (_double == 0) { /* kludge for __dtoa irregularity */ if (ndig <= 1 && (flags & ALT) == 0) { PRINT("0", 1); } else { PRINT("0.", 2); PAD((ndig >= fprec ? ndig - 1 : fprec - (ch != 'f')), zeroes); } } else if (expt == 0 && ndig == 0 && (flags & ALT) == 0) { PRINT("0", 1); } else if (expt <= 0) { PRINT("0.", 2); PAD(-expt, zeroes); PRINT(cp, ndig); if (flags & ALT) PAD(fprec - ndig + (ch == 'f' ? expt : 0), zeroes); } else if (expt >= ndig) { PRINT(cp, ndig); PAD(expt - ndig, zeroes); if (flags & ALT) PRINT(".", 1); } else { PRINT(cp, expt); cp += expt; PRINT(".", 1); PRINT(cp, ndig-expt); if (flags & ALT) PAD(fprec - ndig + (ch == 'f' ? expt : 0), zeroes); } } else { /* 'e' or 'E' */ if (ndig > 1 || flags & ALT) { ox[0] = *cp++; ox[1] = '.'; PRINT(ox, 2); if (_double /*|| flags & ALT == 0*/) { PRINT(cp, ndig-1); } else /* 0.[0..] */ /* __dtoa irregularity */ PAD(ndig - 1, zeroes); if (flags & ALT) PAD(fprec - ndig - 1, zeroes); } else /* XeYYY */ PRINT(cp, 1); PRINT(expstr, expsize); } } #else PRINT(cp, fieldsz); #endif /* left-adjusting padding (always blank) */ if (flags & LADJUST) PAD_L(width - realsz, blanks); /* finally, adjust ret */ ret += width > realsz ? width : realsz; FLUSH(); /* copy out the I/O vectors */ } done: FLUSH(); error: return (BSD__sferror(fp) ? EOF : ret); /* NOTREACHED */ } #ifdef FLOATING_POINT extern char *BSD__dtoa(double, int, int, int *, int *, char **); extern char *BSD__hdtoa(double, const char *, int, int *, int *, char **); static char * cvt(double value, int ndigits, int flags, char *sign, int *decpt, int ch, int *length, char *buf) { int mode, dsgn; char *digits, *bp, *rve; if (ch == 'f') mode = 3; else { mode = 2; } if (value < 0) { value = -value; *sign = '-'; } else if (value == 0.0 && 1.0/value < 0) { *sign = '-'; } else { *sign = '\000'; } if (ch == 'a' || ch =='A') { digits = BSD__hdtoa(value, ch == 'a' ? "0123456789abcdef" : "0123456789ABCDEF", ndigits, decpt, &dsgn, &rve); } else { digits = BSD__dtoa(value, mode, ndigits, decpt, &dsgn, &rve); } buf[0] = 0; /* rve - digits may be 0 */ memcpy(buf, digits, rve - digits); xfree(digits); rve = buf + (rve - digits); digits = buf; if (flags & ALT) { /* Print trailing zeros */ bp = digits + ndigits; if (ch == 'f') { if (*digits == '0' && value) *decpt = -ndigits + 1; bp += *decpt; } while (rve < bp) *rve++ = '0'; } *length = (int)(rve - digits); return (digits); } static int exponent(char *p0, int exp, int fmtch) { register char *p, *t; char expbuf[2 + (MAXEXP < 1000 ? 3 : MAXEXP < 10000 ? 4 : 5)]; /* >= 2 + ceil(log10(MAXEXP)) */ p = p0; *p++ = fmtch; if (exp < 0) { exp = -exp; *p++ = '-'; } else *p++ = '+'; t = expbuf + sizeof(expbuf); if (exp > 9) { do { *--t = to_char(exp % 10); } while ((exp /= 10) > 9); *--t = to_char(exp); for (; t < expbuf + sizeof(expbuf); *p++ = *t++); } else { if (fmtch & 15) *p++ = '0'; /* other than p or P */ *p++ = to_char(exp); } return (int)(p - p0); } #endif /* FLOATING_POINT */ int ruby_vsnprintf(char *str, size_t n, const char *fmt, va_list ap) { int ret; FILE f; if ((int)n < 1) return (EOF); f._flags = __SWR | __SSTR; f._bf._base = f._p = (unsigned char *)str; f._bf._size = f._w = n - 1; f.vwrite = BSD__sfvwrite; f.vextra = 0; ret = (int)BSD_vfprintf(&f, fmt, ap); *f._p = 0; return (ret); } int ruby_snprintf(char *str, size_t n, char const *fmt, ...) { int ret; va_list ap; FILE f; if ((int)n < 1) return (EOF); va_start(ap, fmt); f._flags = __SWR | __SSTR; f._bf._base = f._p = (unsigned char *)str; f._bf._size = f._w = n - 1; f.vwrite = BSD__sfvwrite; f.vextra = 0; ret = (int)BSD_vfprintf(&f, fmt, ap); *f._p = 0; va_end(ap); return (ret); }