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Diffstat (limited to 'mini-os/lib/printf.c')
-rw-r--r-- | mini-os/lib/printf.c | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/mini-os/lib/printf.c b/mini-os/lib/printf.c new file mode 100644 index 0000000000..bd7beba2c5 --- /dev/null +++ b/mini-os/lib/printf.c @@ -0,0 +1,470 @@ +/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*- + **************************************************************************** + * (C) 2003 - Rolf Neugebauer - Intel Research Cambridge + **************************************************************************** + * + * File: printf.c + * Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk) + * Changes: + * + * Date: Aug 2003 + * + * Environment: Xen Minimal OS + * Description: Library functions for printing + * (freebsd port, mainly sys/subr_prf.c) + * + **************************************************************************** + * $Id: c-insert.c,v 1.7 2002/11/08 16:04:34 rn Exp $ + **************************************************************************** + * + *- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This software was developed by the Computer Systems Engineering group + * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and + * contributed to Berkeley. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 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: src/sys/libkern/divdi3.c,v 1.6 1999/08/28 00:46:31 peter Exp $ + */ + +#include <os.h> +#include <types.h> +#include <hypervisor.h> +#include <lib.h> + +/**************************************************************************** + * RN: printf family of routines + * taken mainly from sys/subr_prf.c + ****************************************************************************/ +char const hex2ascii_data[] = "0123456789abcdefghijklmnopqrstuvwxyz"; +#define hex2ascii(hex) (hex2ascii_data[hex]) +#define NBBY 8 /* number of bits in a byte */ +#define MAXNBUF (sizeof(quad_t) * NBBY + 1) + +static int kvprintf(char const *fmt, void *arg, int radix, va_list ap); + + +int +printf(const char *fmt, ...) +{ + va_list ap; + int retval; + static char printk_buf[1024]; + + va_start(ap, fmt); + retval = kvprintf(fmt, printk_buf, 10, ap); + printk_buf[retval] = '\0'; + va_end(ap); + (void)HYPERVISOR_console_write(printk_buf, strlen(printk_buf)); + return retval; +} + +int +vprintf(const char *fmt, va_list ap) +{ + int retval; + static char printk_buf[1024]; + retval = kvprintf(fmt, printk_buf, 10, ap); + printk_buf[retval] = '\0'; + (void)HYPERVISOR_console_write(printk_buf, strlen(printk_buf)); + return retval; +} + +int +sprintf(char *buf, const char *cfmt, ...) +{ + int retval; + va_list ap; + + va_start(ap, cfmt); + retval = kvprintf(cfmt, (void *)buf, 10, ap); + buf[retval] = '\0'; + va_end(ap); + return retval; +} + +int +vsprintf(char *buf, const char *cfmt, va_list ap) +{ + int retval; + + retval = kvprintf(cfmt, (void *)buf, 10, ap); + buf[retval] = '\0'; + return retval; +} + + +/* + * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse + * order; return an optional length and a pointer to the last character + * written in the buffer (i.e., the first character of the string). + * The buffer pointed to by `nbuf' must have length >= MAXNBUF. + */ +static char * +ksprintn(nbuf, ul, base, lenp) + char *nbuf; + u_long ul; + int base, *lenp; +{ + char *p; + + p = nbuf; + *p = '\0'; + do { + *++p = hex2ascii(ul % base); + } while (ul /= base); + if (lenp) + *lenp = p - nbuf; + return (p); +} +/* ksprintn, but for a quad_t. */ +static char * +ksprintqn(nbuf, uq, base, lenp) + char *nbuf; + u_quad_t uq; + int base, *lenp; +{ + char *p; + + p = nbuf; + *p = '\0'; + do { + *++p = hex2ascii(uq % base); + } while (uq /= base); + if (lenp) + *lenp = p - nbuf; + return (p); +} + +/* + * Scaled down version of printf(3). + * + * Two additional formats: + * + * The format %b is supported to decode error registers. + * Its usage is: + * + * printf("reg=%b\n", regval, "<base><arg>*"); + * + * where <base> is the output base expressed as a control character, e.g. + * \10 gives octal; \20 gives hex. Each arg is a sequence of characters, + * the first of which gives the bit number to be inspected (origin 1), and + * the next characters (up to a control character, i.e. a character <= 32), + * give the name of the register. Thus: + * + * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n"); + * + * would produce output: + * + * reg=3<BITTWO,BITONE> + * + * XXX: %D -- Hexdump, takes pointer and separator string: + * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX + * ("%*D", len, ptr, " " -> XX XX XX XX ... + */ + +/* RN: This normally takes a function for output. + * we always print to a string and the use HYPERCALL for write to console */ +static int +kvprintf(char const *fmt, void *arg, int radix, va_list ap) +{ + +#define PCHAR(c) {int cc=(c); *d++ = cc; retval++; } + + char nbuf[MAXNBUF]; + char *p, *q, *d; + u_char *up; + int ch, n; + u_long ul; + u_quad_t uq; + int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot; + int dwidth; + char padc; + int retval = 0; + + ul = 0; + uq = 0; + d = (char *) arg; + + if (fmt == NULL) + fmt = "(fmt null)\n"; + + if (radix < 2 || radix > 36) + radix = 10; + + for (;;) { + padc = ' '; + width = 0; + while ((ch = (u_char)*fmt++) != '%') { + if (ch == '\0') + return retval; + PCHAR(ch); + } + qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0; + sign = 0; dot = 0; dwidth = 0; +reswitch: switch (ch = (u_char)*fmt++) { + case '.': + dot = 1; + goto reswitch; + case '#': + sharpflag = 1; + goto reswitch; + case '+': + sign = 1; + goto reswitch; + case '-': + ladjust = 1; + goto reswitch; + case '%': + PCHAR(ch); + break; + case '*': + if (!dot) { + width = va_arg(ap, int); + if (width < 0) { + ladjust = !ladjust; + width = -width; + } + } else { + dwidth = va_arg(ap, int); + } + goto reswitch; + case '0': + if (!dot) { + padc = '0'; + goto reswitch; + } + case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + for (n = 0;; ++fmt) { + n = n * 10 + ch - '0'; + ch = *fmt; + if (ch < '0' || ch > '9') + break; + } + if (dot) + dwidth = n; + else + width = n; + goto reswitch; + case 'b': + ul = va_arg(ap, int); + p = va_arg(ap, char *); + for (q = ksprintn(nbuf, ul, *p++, NULL); *q;) + PCHAR(*q--); + + if (!ul) + break; + + for (tmp = 0; *p;) { + n = *p++; + if (ul & (1 << (n - 1))) { + PCHAR(tmp ? ',' : '<'); + for (; (n = *p) > ' '; ++p) + PCHAR(n); + tmp = 1; + } else + for (; *p > ' '; ++p) + continue; + } + if (tmp) + PCHAR('>'); + break; + case 'c': + PCHAR(va_arg(ap, int)); + break; + case 'D': + up = va_arg(ap, u_char *); + p = va_arg(ap, char *); + if (!width) + width = 16; + while(width--) { + PCHAR(hex2ascii(*up >> 4)); + PCHAR(hex2ascii(*up & 0x0f)); + up++; + if (width) + for (q=p;*q;q++) + PCHAR(*q); + } + break; + case 'd': + if (qflag) + uq = va_arg(ap, quad_t); + else if (lflag) + ul = va_arg(ap, long); + else + ul = va_arg(ap, int); + sign = 1; + base = 10; + goto number; + case 'l': + if (lflag) { + lflag = 0; + qflag = 1; + } else + lflag = 1; + goto reswitch; + case 'o': + if (qflag) + uq = va_arg(ap, u_quad_t); + else if (lflag) + ul = va_arg(ap, u_long); + else + ul = va_arg(ap, u_int); + base = 8; + goto nosign; + case 'p': + ul = (uintptr_t)va_arg(ap, void *); + base = 16; + sharpflag = (width == 0); + goto nosign; + case 'q': + qflag = 1; + goto reswitch; + case 'n': + case 'r': + if (qflag) + uq = va_arg(ap, u_quad_t); + else if (lflag) + ul = va_arg(ap, u_long); + else + ul = sign ? + (u_long)va_arg(ap, int) : va_arg(ap, u_int); + base = radix; + goto number; + case 's': + p = va_arg(ap, char *); + if (p == NULL) + p = "(null)"; + if (!dot) + n = strlen (p); + else + for (n = 0; n < dwidth && p[n]; n++) + continue; + + width -= n; + + if (!ladjust && width > 0) + while (width--) + PCHAR(padc); + while (n--) + PCHAR(*p++); + if (ladjust && width > 0) + while (width--) + PCHAR(padc); + break; + case 'u': + if (qflag) + uq = va_arg(ap, u_quad_t); + else if (lflag) + ul = va_arg(ap, u_long); + else + ul = va_arg(ap, u_int); + base = 10; + goto nosign; + case 'x': + case 'X': + if (qflag) + uq = va_arg(ap, u_quad_t); + else if (lflag) + ul = va_arg(ap, u_long); + else + ul = va_arg(ap, u_int); + base = 16; + goto nosign; + case 'z': + if (qflag) + uq = va_arg(ap, u_quad_t); + else if (lflag) + ul = va_arg(ap, u_long); + else + ul = sign ? + (u_long)va_arg(ap, int) : va_arg(ap, u_int); + base = 16; + goto number; +nosign: sign = 0; +number: + if (qflag) { + if (sign && (quad_t)uq < 0) { + neg = 1; + uq = -(quad_t)uq; + } + p = ksprintqn(nbuf, uq, base, &tmp); + } else { + if (sign && (long)ul < 0) { + neg = 1; + ul = -(long)ul; + } + p = ksprintn(nbuf, ul, base, &tmp); + } + if (sharpflag && (qflag ? uq != 0 : ul != 0)) { + if (base == 8) + tmp++; + else if (base == 16) + tmp += 2; + } + if (neg) + tmp++; + + if (!ladjust && width && (width -= tmp) > 0) + while (width--) + PCHAR(padc); + if (neg) + PCHAR('-'); + if (sharpflag && (qflag ? uq != 0 : ul != 0)) { + if (base == 8) { + PCHAR('0'); + } else if (base == 16) { + PCHAR('0'); + PCHAR('x'); + } + } + + while (*p) + PCHAR(*p--); + + if (ladjust && width && (width -= tmp) > 0) + while (width--) + PCHAR(padc); + + break; + default: + PCHAR('%'); + if (lflag) + PCHAR('l'); + PCHAR(ch); + break; + } + } +#undef PCHAR +} + |