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freebsd-nq/include/printf.h

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Add an extensible version of our *printf(3) implementation to libc on probationary terms: it may go away again if it transpires it is a bad idea. This extensible printf version will only be used if either environment variable USE_XPRINTF is defined or one of the extension functions are called. or the global variable __use_xprintf is set greater than zero. In all other cases our traditional printf implementation will be used. The extensible version is slower than the default printf, mostly because less opportunity for combining I/O operation exists when faced with extensions. The default printf on the other hand is a bad case of spaghetti code. The extension API has a GLIBC compatible part and a FreeBSD version of same. The FreeBSD version exists because the GLIBC version may run afoul of our FILE * locking in multithreaded programs and it even further eliminate the opportunities for combining I/O operations. Include three demo extensions which can be enabled if desired: time (%T), hexdump (%H) and strvis (%V). %T can format time_t (%T), struct timeval (%lT) and struct timespec (%llT) in one of two human readable duration formats: "%.3llT" -> "20349.245" "%#.3llT" -> "5h39m9.245" %H will hexdump a sequence of bytes and takes a pointer and a length argument. The width specifies number of bytes per line. "%4H" -> "65 72 20 65" "%+4H" -> "0000 65 72 20 65" "%#4H" -> "65 72 20 65 |er e|" "%+#4H" -> "0000 65 72 20 65 |er e|" %V will dump a string in strvis format. "%V" -> "Hello\tWor\377ld" (C-style) "%0V" -> "Hello\011Wor\377ld" (octal) "%+V" -> "Hello%09Wor%FFld" (http-style) Tests, comments, bugreports etc are most welcome.
2005-12-16 18:56:39 +00:00
/*-
* Copyright (c) 2005 Poul-Henning Kamp
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _PRINTF_H_
#define _PRINTF_H_
/*
* The API defined by glibc allows a renderer to take multiple arguments
* This is obviously usable for things like (ptr+len) pairs etc.
* But the do not actually provide support for it at the end of the day,
* they offer only one argument to the arginfo function, but do accept
* >1 returns, although the do not check the types of those arguments
* argument
* Be compatible for now.
*/
#define __PRINTFMAXARG 2
struct printf_info {
/* GLIBC compatible */
int prec;
int width;
wchar_t spec;
unsigned is_long_double;
unsigned is_char;
unsigned is_short;
unsigned is_long;
unsigned alt;
unsigned space;
unsigned left;
unsigned showsign;
unsigned group;
unsigned extra;
unsigned wide;
wchar_t pad;
/* FreeBSD extensions */
unsigned is_quad;
unsigned is_intmax;
unsigned is_ptrdiff;
unsigned is_size;
/* private */
int sofar;
unsigned get_width;
unsigned get_prec;
const char *begin;
const char *end;
void *arg[__PRINTFMAXARG];
};
enum {
PA_INT = (1 << 0), /* int */
PA_CHAR = (1 << 1), /* int, cast to char */
PA_WCHAR = (1 << 2), /* wide char */
PA_STRING = (1 << 3), /* const char * (with '\0') */
PA_WSTRING = (1 << 4), /* const wchar_t * */
PA_POINTER = (1 << 5), /* void * */
PA_FLOAT = (1 << 6), /* float */
PA_DOUBLE = (1 << 7) /* double */
};
#define PA_FLAG_MASK 0xff0000
#define PA_FLAG_LONG_LONG (1 << 16)
#define PA_FLAG_LONG (1 << 17)
#define PA_FLAG_SHORT (1 << 18)
#define PA_FLAG_PTR (1 << 19)
#define PA_FLAG_QUAD (1 << 20)
#define PA_FLAG_INTMAX (1 << 21)
#define PA_FLAG_SIZE (1 << 22)
#define PA_FLAG_PTRDIFF (1 << 23)
#define PA_FLAG_LONG_DOUBLE PA_FLAG_LONG_LONG
typedef int printf_arginfo_function(const struct printf_info *, size_t, int *);
typedef int printf_function(FILE *, const struct printf_info *, const void *const *);
/* FreeBSD extension */
struct __printf_io;
typedef int printf_render(struct __printf_io *, const struct printf_info *, const void *const *);
/* vprintf.c */
extern const char __lowercase_hex[17];
extern const char __uppercase_hex[17];
void __printf_flush(struct __printf_io *io);
int __printf_puts(struct __printf_io *io, const void *ptr, int len);
int __printf_pad(struct __printf_io *io, int n, int zero);
int __printf_out(struct __printf_io *io, const struct printf_info *pi, const void *ptr, int len);
int __xvprintf(FILE *fp, const char *fmt0, va_list ap);
extern int __use_xprintf;
/* GLIBC compat */
int register_printf_function(int spec, printf_function *render, printf_arginfo_function *arginfo);
/* FreeBSD */
int register_printf_render(int spec, printf_render *render, printf_arginfo_function *arginfo);
int register_printf_render_std(const unsigned char *specs);
Make the %V{is} extension handle a NULL pointer like %s does: output "(null)" Add %M{essage} extension which prints an errno value as the corresponding string if possible or numerically otherwise. It is not currently possible to do the syslog(3) like %m extension because errno would need to get capatured on entry to the first function in the printf family, so %M requires you to supply errno as an argument. Add %Q{uote} extension which will print a string in double quotes with appropriate back-slash escapes (only) if necessary.
2006-01-25 12:45:24 +00:00
/* vprintf_errno.c */
printf_arginfo_function __printf_arginfo_errno;
printf_render __printf_render_errno;
Add an extensible version of our *printf(3) implementation to libc on probationary terms: it may go away again if it transpires it is a bad idea. This extensible printf version will only be used if either environment variable USE_XPRINTF is defined or one of the extension functions are called. or the global variable __use_xprintf is set greater than zero. In all other cases our traditional printf implementation will be used. The extensible version is slower than the default printf, mostly because less opportunity for combining I/O operation exists when faced with extensions. The default printf on the other hand is a bad case of spaghetti code. The extension API has a GLIBC compatible part and a FreeBSD version of same. The FreeBSD version exists because the GLIBC version may run afoul of our FILE * locking in multithreaded programs and it even further eliminate the opportunities for combining I/O operations. Include three demo extensions which can be enabled if desired: time (%T), hexdump (%H) and strvis (%V). %T can format time_t (%T), struct timeval (%lT) and struct timespec (%llT) in one of two human readable duration formats: "%.3llT" -> "20349.245" "%#.3llT" -> "5h39m9.245" %H will hexdump a sequence of bytes and takes a pointer and a length argument. The width specifies number of bytes per line. "%4H" -> "65 72 20 65" "%+4H" -> "0000 65 72 20 65" "%#4H" -> "65 72 20 65 |er e|" "%+#4H" -> "0000 65 72 20 65 |er e|" %V will dump a string in strvis format. "%V" -> "Hello\tWor\377ld" (C-style) "%0V" -> "Hello\011Wor\377ld" (octal) "%+V" -> "Hello%09Wor%FFld" (http-style) Tests, comments, bugreports etc are most welcome.
2005-12-16 18:56:39 +00:00
/* vprintf_float.c */
printf_arginfo_function __printf_arginfo_float;
printf_render __printf_render_float;
Make the %V{is} extension handle a NULL pointer like %s does: output "(null)" Add %M{essage} extension which prints an errno value as the corresponding string if possible or numerically otherwise. It is not currently possible to do the syslog(3) like %m extension because errno would need to get capatured on entry to the first function in the printf family, so %M requires you to supply errno as an argument. Add %Q{uote} extension which will print a string in double quotes with appropriate back-slash escapes (only) if necessary.
2006-01-25 12:45:24 +00:00
/* vprintf_hexdump.c */
printf_arginfo_function __printf_arginfo_hexdump;
printf_render __printf_render_hexdump;
Add an extensible version of our *printf(3) implementation to libc on probationary terms: it may go away again if it transpires it is a bad idea. This extensible printf version will only be used if either environment variable USE_XPRINTF is defined or one of the extension functions are called. or the global variable __use_xprintf is set greater than zero. In all other cases our traditional printf implementation will be used. The extensible version is slower than the default printf, mostly because less opportunity for combining I/O operation exists when faced with extensions. The default printf on the other hand is a bad case of spaghetti code. The extension API has a GLIBC compatible part and a FreeBSD version of same. The FreeBSD version exists because the GLIBC version may run afoul of our FILE * locking in multithreaded programs and it even further eliminate the opportunities for combining I/O operations. Include three demo extensions which can be enabled if desired: time (%T), hexdump (%H) and strvis (%V). %T can format time_t (%T), struct timeval (%lT) and struct timespec (%llT) in one of two human readable duration formats: "%.3llT" -> "20349.245" "%#.3llT" -> "5h39m9.245" %H will hexdump a sequence of bytes and takes a pointer and a length argument. The width specifies number of bytes per line. "%4H" -> "65 72 20 65" "%+4H" -> "0000 65 72 20 65" "%#4H" -> "65 72 20 65 |er e|" "%+#4H" -> "0000 65 72 20 65 |er e|" %V will dump a string in strvis format. "%V" -> "Hello\tWor\377ld" (C-style) "%0V" -> "Hello\011Wor\377ld" (octal) "%+V" -> "Hello%09Wor%FFld" (http-style) Tests, comments, bugreports etc are most welcome.
2005-12-16 18:56:39 +00:00
/* vprintf_int.c */
printf_arginfo_function __printf_arginfo_ptr;
printf_arginfo_function __printf_arginfo_int;
printf_render __printf_render_ptr;
printf_render __printf_render_int;
Make the %V{is} extension handle a NULL pointer like %s does: output "(null)" Add %M{essage} extension which prints an errno value as the corresponding string if possible or numerically otherwise. It is not currently possible to do the syslog(3) like %m extension because errno would need to get capatured on entry to the first function in the printf family, so %M requires you to supply errno as an argument. Add %Q{uote} extension which will print a string in double quotes with appropriate back-slash escapes (only) if necessary.
2006-01-25 12:45:24 +00:00
/* vprintf_quoute.c */
printf_arginfo_function __printf_arginfo_quote;
printf_render __printf_render_quote;
Add an extensible version of our *printf(3) implementation to libc on probationary terms: it may go away again if it transpires it is a bad idea. This extensible printf version will only be used if either environment variable USE_XPRINTF is defined or one of the extension functions are called. or the global variable __use_xprintf is set greater than zero. In all other cases our traditional printf implementation will be used. The extensible version is slower than the default printf, mostly because less opportunity for combining I/O operation exists when faced with extensions. The default printf on the other hand is a bad case of spaghetti code. The extension API has a GLIBC compatible part and a FreeBSD version of same. The FreeBSD version exists because the GLIBC version may run afoul of our FILE * locking in multithreaded programs and it even further eliminate the opportunities for combining I/O operations. Include three demo extensions which can be enabled if desired: time (%T), hexdump (%H) and strvis (%V). %T can format time_t (%T), struct timeval (%lT) and struct timespec (%llT) in one of two human readable duration formats: "%.3llT" -> "20349.245" "%#.3llT" -> "5h39m9.245" %H will hexdump a sequence of bytes and takes a pointer and a length argument. The width specifies number of bytes per line. "%4H" -> "65 72 20 65" "%+4H" -> "0000 65 72 20 65" "%#4H" -> "65 72 20 65 |er e|" "%+#4H" -> "0000 65 72 20 65 |er e|" %V will dump a string in strvis format. "%V" -> "Hello\tWor\377ld" (C-style) "%0V" -> "Hello\011Wor\377ld" (octal) "%+V" -> "Hello%09Wor%FFld" (http-style) Tests, comments, bugreports etc are most welcome.
2005-12-16 18:56:39 +00:00
/* vprintf_str.c */
printf_arginfo_function __printf_arginfo_chr;
printf_render __printf_render_chr;
printf_arginfo_function __printf_arginfo_str;
printf_render __printf_render_str;
/* vprintf_time.c */
printf_arginfo_function __printf_arginfo_time;
printf_render __printf_render_time;
/* vprintf_vis.c */
printf_arginfo_function __printf_arginfo_vis;
printf_render __printf_render_vis;
#endif /* !_PRINTF_H */
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