158 lines
4.0 KiB
C
158 lines
4.0 KiB
C
/*
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* Copyright (C) 2009 Tobias Brunner
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* Copyright (C) 2006-2008 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup printf_hook printf_hook
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* @{ @ingroup libstrongswan
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*/
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#ifndef PRINTF_HOOK_H_
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#define PRINTF_HOOK_H_
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typedef struct printf_hook_t printf_hook_t;
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typedef struct printf_hook_spec_t printf_hook_spec_t;
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typedef enum printf_hook_argtype_t printf_hook_argtype_t;
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#if !defined(USE_VSTR) && \
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(defined(HAVE_PRINTF_FUNCTION) || defined(HAVE_PRINTF_SPECIFIER))
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#include <stdio.h>
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#include <printf.h>
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enum printf_hook_argtype_t {
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PRINTF_HOOK_ARGTYPE_END = -1,
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PRINTF_HOOK_ARGTYPE_INT = PA_INT,
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PRINTF_HOOK_ARGTYPE_POINTER = PA_POINTER,
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};
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#else
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#include <vstr.h>
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enum printf_hook_argtype_t {
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PRINTF_HOOK_ARGTYPE_END = VSTR_TYPE_FMT_END,
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PRINTF_HOOK_ARGTYPE_INT = VSTR_TYPE_FMT_INT,
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PRINTF_HOOK_ARGTYPE_POINTER = VSTR_TYPE_FMT_PTR_VOID,
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};
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/**
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* Redefining printf and alike
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*/
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#include <stdio.h>
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#include <stdarg.h>
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int vstr_wrapper_printf(const char *format, ...);
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int vstr_wrapper_fprintf(FILE *stream, const char *format, ...);
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int vstr_wrapper_sprintf(char *str, const char *format, ...);
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int vstr_wrapper_snprintf(char *str, size_t size, const char *format, ...);
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int vstr_wrapper_asprintf(char **str, const char *format, ...);
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int vstr_wrapper_vprintf(const char *format, va_list ap);
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int vstr_wrapper_vfprintf(FILE *stream, const char *format, va_list ap);
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int vstr_wrapper_vsprintf(char *str, const char *format, va_list ap);
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int vstr_wrapper_vsnprintf(char *str, size_t size, const char *format, va_list ap);
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int vstr_wrapper_vasprintf(char **str, const char *format, va_list ap);
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#define printf vstr_wrapper_printf
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#define fprintf vstr_wrapper_fprintf
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#define sprintf vstr_wrapper_sprintf
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#define snprintf vstr_wrapper_snprintf
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#define asprintf vstr_wrapper_asprintf
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#define vprintf vstr_wrapper_vprintf
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#define vfprintf vstr_wrapper_vfprintf
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#define vsprintf vstr_wrapper_vsprintf
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#define vsnprintf vstr_wrapper_vsnprintf
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#define vasprintf vstr_wrapper_vasprintf
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#endif
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/**
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* Callback function type for printf hooks.
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*
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* @param dst destination buffer
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* @param len length of the buffer
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* @param spec format specifier
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* @param args arguments array
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* @return number of characters written
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*/
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typedef int (*printf_hook_function_t)(char *dst, size_t len,
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printf_hook_spec_t *spec,
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const void *const *args);
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/**
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* Helper macro to be used in printf hook callbacks.
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* buf and buflen get modified.
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*/
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#define print_in_hook(buf, buflen, fmt, ...) ({\
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int _written = snprintf(buf, buflen, fmt, ##__VA_ARGS__);\
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if (_written < 0 || _written >= buflen)\
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{\
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_written = buflen - 1;\
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}\
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buf += _written;\
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buflen -= _written;\
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_written;\
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})
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/**
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* Properties of the format specifier
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*/
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struct printf_hook_spec_t {
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/**
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* TRUE if a '#' was used in the format specifier
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*/
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int hash;
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/**
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* TRUE if a '-' was used in the format specifier
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*/
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int minus;
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/**
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* The width as given in the format specifier.
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*/
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int width;
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};
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/**
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* Printf handler management.
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*/
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struct printf_hook_t {
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/**
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* Register a printf handler.
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*
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* @param spec printf hook format character
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* @param hook hook function
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* @param ... list of PRINTF_HOOK_ARGTYPE_*, MUST end with PRINTF_HOOK_ARGTYPE_END
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*/
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void (*add_handler)(printf_hook_t *this, char spec,
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printf_hook_function_t hook, ...);
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/**
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* Destroy a printf_hook instance.
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*/
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void (*destroy)(printf_hook_t *this);
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};
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/**
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* Create a printf_hook instance.
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*/
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printf_hook_t *printf_hook_create();
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#endif /** PRINTF_HOOK_H_ @}*/
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