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Diffstat (limited to 'lib/libc/stdio/printfcommon.h')
-rw-r--r-- | lib/libc/stdio/printfcommon.h | 301 |
1 files changed, 0 insertions, 301 deletions
diff --git a/lib/libc/stdio/printfcommon.h b/lib/libc/stdio/printfcommon.h deleted file mode 100644 index 39b0003..0000000 --- a/lib/libc/stdio/printfcommon.h +++ /dev/null @@ -1,301 +0,0 @@ -/*- - * 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. - * 4. 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. - * - * $FreeBSD$ - */ - -/* - * This file defines common routines used by both printf and wprintf. - * You must define CHAR to either char or wchar_t prior to including this. - */ - - -#ifndef NO_FLOATING_POINT - -#define dtoa __dtoa -#define freedtoa __freedtoa - -#include <float.h> -#include <math.h> -#include "floatio.h" -#include "gdtoa.h" - -#define DEFPREC 6 - -static int exponent(CHAR *, int, CHAR); - -#endif /* !NO_FLOATING_POINT */ - -static CHAR *__ujtoa(uintmax_t, CHAR *, int, int, const char *); -static CHAR *__ultoa(u_long, CHAR *, int, int, const char *); - -#define NIOV 8 -struct io_state { - FILE *fp; - struct __suio uio; /* output information: summary */ - struct __siov iov[NIOV];/* ... and individual io vectors */ -}; - -static inline void -io_init(struct io_state *iop, FILE *fp) -{ - - iop->uio.uio_iov = iop->iov; - iop->uio.uio_resid = 0; - iop->uio.uio_iovcnt = 0; - iop->fp = fp; -} - -/* - * WARNING: The buffer passed to io_print() is not copied immediately; it must - * remain valid until io_flush() is called. - */ -static inline int -io_print(struct io_state *iop, const CHAR * __restrict ptr, int len) -{ - - iop->iov[iop->uio.uio_iovcnt].iov_base = (char *)ptr; - iop->iov[iop->uio.uio_iovcnt].iov_len = len; - iop->uio.uio_resid += len; - if (++iop->uio.uio_iovcnt >= NIOV) - return (__sprint(iop->fp, &iop->uio)); - else - return (0); -} - -/* - * Choose PADSIZE to trade efficiency vs. size. If larger printf - * fields occur frequently, increase PADSIZE and make the initialisers - * 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'}; - -/* - * Pad with blanks or zeroes. 'with' should point to either the blanks array - * or the zeroes array. - */ -static inline int -io_pad(struct io_state *iop, int howmany, const CHAR * __restrict with) -{ - int n; - - while (howmany > 0) { - n = (howmany >= PADSIZE) ? PADSIZE : howmany; - if (io_print(iop, with, n)) - return (-1); - howmany -= n; - } - return (0); -} - -/* - * Print exactly len characters of the string spanning p to ep, truncating - * or padding with 'with' as necessary. - */ -static inline int -io_printandpad(struct io_state *iop, const CHAR *p, const CHAR *ep, - int len, const CHAR * __restrict with) -{ - int p_len; - - p_len = ep - p; - if (p_len > len) - p_len = len; - if (p_len > 0) { - if (io_print(iop, p, p_len)) - return (-1); - } else { - p_len = 0; - } - return (io_pad(iop, len - p_len, with)); -} - -static inline int -io_flush(struct io_state *iop) -{ - - return (__sprint(iop->fp, &iop->uio)); -} - -/* - * 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 * -__ultoa(u_long val, CHAR *endp, int base, int octzero, const char *xdigs) -{ - CHAR *cp = endp; - 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(); - } - return (cp); -} - -/* Identical to __ultoa, but for intmax_t. */ -static CHAR * -__ujtoa(uintmax_t val, CHAR *endp, int base, int octzero, const char *xdigs) -{ - CHAR *cp = endp; - intmax_t sval; - - /* quick test for small values; __ultoa is typically much faster */ - /* (perhaps instead we should run until small, then call __ultoa?) */ - if (val <= ULONG_MAX) - return (__ultoa((u_long)val, endp, base, octzero, xdigs)); - switch (base) { - case 10: - if (val < 10) { - *--cp = to_char(val % 10); - return (cp); - } - if (val > INTMAX_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: - abort(); - } - return (cp); -} - -#ifndef NO_FLOATING_POINT - -static int -exponent(CHAR *p0, int exp, CHAR fmtch) -{ - CHAR *p, *t; - CHAR expbuf[MAXEXPDIG]; - - p = p0; - *p++ = fmtch; - if (exp < 0) { - exp = -exp; - *p++ = '-'; - } - else - *p++ = '+'; - t = expbuf + MAXEXPDIG; - if (exp > 9) { - do { - *--t = to_char(exp % 10); - } while ((exp /= 10) > 9); - *--t = to_char(exp); - for (; t < expbuf + MAXEXPDIG; *p++ = *t++); - } - else { - /* - * Exponents for decimal floating point conversions - * (%[eEgG]) must be at least two characters long, - * whereas exponents for hexadecimal conversions can - * be only one character long. - */ - if (fmtch == 'e' || fmtch == 'E') - *p++ = '0'; - *p++ = to_char(exp); - } - return (p - p0); -} - -#endif /* !NO_FLOATING_POINT */ |