1292 lines
24 KiB
C
1292 lines
24 KiB
C
/*
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* Copyright (C) 2013 Martin Willi
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* Copyright (C) 2013 revosec AG
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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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* Copyright (C) 2002-2006 H. Peter Anvin
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "printf_hook.h"
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#include <utils/utils.h>
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#include <utils/debug.h>
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#include <collections/hashtable.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <math.h>
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#define PRINTF_BUF_LEN 8192
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#define ARGS_MAX 3
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typedef struct private_printf_hook_t private_printf_hook_t;
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typedef struct printf_hook_handler_t printf_hook_handler_t;
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/**
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* private data of printf_hook
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*/
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struct private_printf_hook_t {
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/**
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* public functions
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*/
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printf_hook_t public;
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};
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/**
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* struct with information about a registered handler
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*/
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struct printf_hook_handler_t {
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/**
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* callback function
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*/
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printf_hook_function_t hook;
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/**
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* number of arguments
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*/
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int numargs;
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/**
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* types of the arguments
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*/
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int argtypes[ARGS_MAX];
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};
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/**
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* Data to pass to a printf hook.
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*/
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struct printf_hook_data_t {
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/**
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* Output buffer
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*/
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char *q;
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/**
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* Remaining bytes in q
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*/
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size_t n;
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};
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/**
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* Registered hooks (char => printf_hook_handler_t)
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*/
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static hashtable_t *hooks;
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/**
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* builtin-printf variant of print_in_hook()
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*/
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size_t print_in_hook(printf_hook_data_t *data, char *fmt, ...)
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{
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int written;
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va_list args;
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va_start(args, fmt);
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written = builtin_vsnprintf(data->q, data->n, fmt, args);
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va_end(args);
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if (written > data->n)
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{
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data->q += data->n;
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data->n = 0;
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}
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else
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{
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data->q += written;
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data->n -= written;
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}
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return written;
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}
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METHOD(printf_hook_t, add_handler, void,
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private_printf_hook_t *this, char spec, printf_hook_function_t hook, ...)
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{
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int i = -1;
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bool failed = FALSE;
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printf_hook_handler_t *handler;
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printf_hook_argtype_t argtype;
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va_list args;
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INIT(handler,
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.hook = hook,
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);
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va_start(args, hook);
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while (!failed)
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{
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argtype = va_arg(args, printf_hook_argtype_t);
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if (argtype == PRINTF_HOOK_ARGTYPE_END)
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{
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break;
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}
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if (++i >= countof(handler->argtypes))
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{
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DBG1(DBG_LIB, "Too many arguments for printf hook with "
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"specifier '%c', not registered!", spec);
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failed = TRUE;
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break;
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}
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handler->argtypes[i] = argtype;
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}
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va_end(args);
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handler->numargs = i + 1;
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if (!failed && handler->numargs > 0)
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{
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free(hooks->put(hooks, (void*)(uintptr_t)spec, handler));
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}
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else
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{
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free(handler);
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}
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}
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/**
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* Printf format modifier flags
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*/
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typedef enum {
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FL_ZERO = 0x01,
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FL_MINUS = 0x02,
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FL_PLUS = 0x04,
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FL_TICK = 0x08,
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FL_SPACE = 0x10,
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FL_HASH = 0x20,
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FL_SIGNED = 0x40,
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FL_UPPER = 0x80,
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} bpf_flag_t;
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/**
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* Size of format string arguments
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*/
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typedef enum {
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RNK_CHAR = -2,
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RNK_SHORT = -1,
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RNK_INT = 0,
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RNK_LONG = 1,
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RNK_LONGLONG = 2,
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RNK_INTMAX = RNK_LONGLONG,
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RNK_SIZE_T = RNK_LONG,
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RNK_PTRDIFF_T = RNK_LONG,
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RNK_MIN = RNK_CHAR,
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RNK_MAX = RNK_LONGLONG,
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} bpf_rank_t;
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/**
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* Printf specifier Parser state
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*/
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typedef enum {
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/* Ground state */
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ST_NORMAL,
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/* Special flags */
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ST_FLAGS,
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/* Field width */
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ST_WIDTH,
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/* Field precision */
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ST_PREC,
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/* Length or conversion modifiers */
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ST_MODIFIERS,
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} bpf_state_t;
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#define EMIT(x) ({ if (o<n){*q++ = (x);} o++; })
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static const char lcdigits[] = "0123456789abcdef";
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static const char ucdigits[] = "0123456789ABCDEF";
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/**
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* Write an integer argument to q, using flags, base, width and precision
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*/
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static size_t format_int(char *q, size_t n, uintmax_t val, bpf_flag_t flags,
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int base, int width, int prec)
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{
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char *qq;
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size_t o = 0, oo;
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const char *digits;
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uintmax_t tmpval;
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int minus = 0;
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int ndigits = 0, nchars;
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int tickskip, b4tick;
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/* Select type of digits */
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digits = (flags & FL_UPPER) ? ucdigits : lcdigits;
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/* If signed, separate out the minus */
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if (flags & FL_SIGNED && (intmax_t) val < 0)
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{
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minus = 1;
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val = (uintmax_t) (-(intmax_t) val);
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}
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/* Count the number of digits needed. This returns zero for 0. */
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tmpval = val;
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while (tmpval)
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{
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tmpval /= base;
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ndigits++;
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}
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/* Adjust ndigits for size of output */
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if (flags & FL_HASH && base == 8)
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{
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if (prec < ndigits + 1)
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{
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prec = ndigits + 1;
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}
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}
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if (ndigits < prec)
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{
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/* Mandatory number padding */
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ndigits = prec;
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}
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else if (val == 0)
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{
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/* Zero still requires space */
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ndigits = 1;
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}
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/* For ', figure out what the skip should be */
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if (flags & FL_TICK)
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{
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if (base == 16)
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{
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tickskip = 4;
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}
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else
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{
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tickskip = 3;
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}
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}
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else
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{
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/* No tick marks */
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tickskip = ndigits;
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}
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/* Tick marks aren't digits, but generated by the number converter */
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ndigits += (ndigits - 1) / tickskip;
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/* Now compute the number of nondigits */
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nchars = ndigits;
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if (minus || (flags & (FL_PLUS | FL_SPACE)))
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{
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/* Need space for sign */
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nchars++;
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}
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if ((flags & FL_HASH) && base == 16)
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{
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/* Add 0x for hex */
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nchars += 2;
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}
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/* Emit early space padding */
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if (!(flags & (FL_MINUS | FL_ZERO)) && width > nchars)
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{
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while (width > nchars)
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{
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EMIT(' ');
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width--;
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}
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}
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/* Emit nondigits */
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if (minus)
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{
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EMIT('-');
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}
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else if (flags & FL_PLUS)
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{
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EMIT('+');
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}
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else if (flags & FL_SPACE)
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{
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EMIT(' ');
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}
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if ((flags & FL_HASH) && base == 16)
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{
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EMIT('0');
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EMIT((flags & FL_UPPER) ? 'X' : 'x');
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}
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/* Emit zero padding */
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if ((flags & (FL_MINUS | FL_ZERO)) == FL_ZERO && width > ndigits)
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{
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while (width > nchars)
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{
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EMIT('0');
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width--;
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}
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}
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/* Generate the number. This is done from right to left. */
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/* Advance the pointer to end of number */
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q += ndigits;
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o += ndigits;
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/* Temporary values */
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qq = q;
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oo = o;
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b4tick = tickskip;
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while (ndigits > 0)
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{
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if (!b4tick--)
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{
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qq--;
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oo--;
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ndigits--;
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if (oo < n)
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{
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*qq = '_';
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}
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b4tick = tickskip - 1;
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}
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qq--;
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oo--;
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ndigits--;
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if (oo < n)
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{
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*qq = digits[val % base];
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}
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val /= base;
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}
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/* Emit late space padding */
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while ((flags & FL_MINUS) && width > nchars)
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{
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EMIT(' ');
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width--;
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}
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return o;
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}
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/**
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* Write an double argument to q, using flags, base, width and precision
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*/
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static size_t format_double(char *q, size_t n, double val, bpf_flag_t flags,
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int base, int width, int prec)
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{
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char *qq;
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size_t o = 0, oo;
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const char *digits;
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uintmax_t tmpval;
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int minus = 0;
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int ndigits = 0, nchars;
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/* Select type of digits */
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digits = (flags & FL_UPPER) ? ucdigits : lcdigits;
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if (prec < 0)
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{
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/* default precision */
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prec = 6;
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}
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if (val < 0)
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{
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minus = 1;
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}
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tmpval = (uintmax_t)fabs(val);
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while (tmpval)
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{
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tmpval /= base;
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ndigits++;
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}
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if (val == 0)
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{
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ndigits++;
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}
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/* Now compute the number of nondigits */
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nchars = ndigits;
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if (prec)
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{
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/* Space for decimal-point and digits after that */
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nchars += prec + 1;
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}
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if (minus || (flags & (FL_PLUS | FL_SPACE)))
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{
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/* Need space for sign */
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nchars++;
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}
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if ((flags & FL_HASH) && base == 16)
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{
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/* Add 0x for hex */
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nchars += 2;
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}
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/* Emit early space padding */
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if (!(flags & (FL_MINUS | FL_ZERO)) && width > nchars)
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{
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while (width > nchars)
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{
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EMIT(' ');
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width--;
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}
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}
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/* Emit nondigits */
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if (minus)
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{
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EMIT('-');
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}
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else if (flags & FL_PLUS)
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{
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EMIT('+');
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}
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else if (flags & FL_SPACE)
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{
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EMIT(' ');
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}
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if ((flags & FL_HASH) && base == 16)
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{
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EMIT('0');
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EMIT((flags & FL_UPPER) ? 'X' : 'x');
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}
|
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|
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/* Emit zero padding */
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if ((flags & (FL_MINUS | FL_ZERO)) == FL_ZERO && width > ndigits)
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{
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while (width > nchars)
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{
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EMIT('0');
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width--;
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}
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}
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/* Generate the number. This is done from right to left. */
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/* Advance the pointer to end of number */
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q += ndigits;
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o += ndigits;
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/* Temporary values */
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qq = q;
|
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oo = o;
|
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tmpval = (uintmax_t)fabs(val);
|
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if (!prec)
|
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{
|
|
/* round up if no additional digits */
|
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if (fabs(val) - tmpval >= 0.5)
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{
|
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tmpval++;
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}
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}
|
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while (ndigits > 0)
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{
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qq--;
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oo--;
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ndigits--;
|
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if (oo < n)
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{
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*qq = digits[tmpval % base];
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}
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tmpval /= base;
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}
|
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|
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if (prec)
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{
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EMIT('.');
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|
|
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q += prec;
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o += prec;
|
|
qq = q;
|
|
oo = o;
|
|
|
|
tmpval = (uintmax_t)(fabs(val) * pow(base, prec));
|
|
/* round up if required */
|
|
if (fabs(val) * pow(base, prec) - tmpval >= 0.5)
|
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{
|
|
tmpval++;
|
|
}
|
|
while (prec > 0)
|
|
{
|
|
qq--;
|
|
oo--;
|
|
prec--;
|
|
if (oo < n)
|
|
{
|
|
*qq = digits[tmpval % base];
|
|
}
|
|
tmpval /= base;
|
|
}
|
|
}
|
|
|
|
/* Emit late space padding */
|
|
while ((flags & FL_MINUS) && width > nchars)
|
|
{
|
|
EMIT(' ');
|
|
width--;
|
|
}
|
|
|
|
return o;
|
|
}
|
|
|
|
int builtin_vsnprintf(char *buffer, size_t n, const char *format, va_list ap)
|
|
{
|
|
const char *p = format;
|
|
char ch;
|
|
char *q = buffer;
|
|
/* Number of characters output */
|
|
size_t o = 0;
|
|
uintmax_t val = 0;
|
|
/* Default rank */
|
|
int rank = RNK_INT;
|
|
int width = 0;
|
|
int prec = -1;
|
|
int base;
|
|
size_t sz;
|
|
bpf_flag_t flags = 0;
|
|
bpf_state_t state = ST_NORMAL;
|
|
/* %s string argument */
|
|
const char *sarg;
|
|
/* %c char argument */
|
|
char carg;
|
|
/* String length */
|
|
int slen;
|
|
|
|
while ((ch = *p++))
|
|
{
|
|
switch (state)
|
|
{
|
|
case ST_NORMAL:
|
|
{
|
|
if (ch == '%')
|
|
{
|
|
state = ST_FLAGS;
|
|
flags = 0;
|
|
rank = RNK_INT;
|
|
width = 0;
|
|
prec = -1;
|
|
}
|
|
else
|
|
{
|
|
EMIT(ch);
|
|
}
|
|
break;
|
|
}
|
|
case ST_FLAGS:
|
|
{
|
|
switch (ch)
|
|
{
|
|
case '-':
|
|
flags |= FL_MINUS;
|
|
break;
|
|
case '+':
|
|
flags |= FL_PLUS;
|
|
break;
|
|
case '\'':
|
|
flags |= FL_TICK;
|
|
break;
|
|
case ' ':
|
|
flags |= FL_SPACE;
|
|
break;
|
|
case '#':
|
|
flags |= FL_HASH;
|
|
break;
|
|
case '0':
|
|
flags |= FL_ZERO;
|
|
break;
|
|
default:
|
|
state = ST_WIDTH;
|
|
/* Process this character again */
|
|
p--;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case ST_WIDTH:
|
|
{
|
|
if (ch >= '0' && ch <= '9')
|
|
{
|
|
width = width * 10 + (ch - '0');
|
|
}
|
|
else if (ch == '*')
|
|
{
|
|
width = va_arg(ap, int);
|
|
if (width < 0)
|
|
{
|
|
width = -width;
|
|
flags |= FL_MINUS;
|
|
}
|
|
}
|
|
else if (ch == '.')
|
|
{
|
|
/* Precision given */
|
|
prec = 0;
|
|
state = ST_PREC;
|
|
}
|
|
else
|
|
{
|
|
state = ST_MODIFIERS;
|
|
/* Process this character again */
|
|
p--;
|
|
}
|
|
break;
|
|
}
|
|
case ST_PREC:
|
|
{
|
|
if (ch >= '0' && ch <= '9')
|
|
{
|
|
prec = prec * 10 + (ch - '0');
|
|
}
|
|
else if (ch == '*')
|
|
{
|
|
prec = va_arg(ap, int);
|
|
if (prec < 0)
|
|
{
|
|
prec = -1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
state = ST_MODIFIERS;
|
|
/* Process this character again */
|
|
p--;
|
|
}
|
|
break;
|
|
}
|
|
case ST_MODIFIERS:
|
|
{
|
|
switch (ch)
|
|
{
|
|
/* Length modifiers - nonterminal sequences */
|
|
case 'h':
|
|
rank--;
|
|
break;
|
|
case 'l':
|
|
rank++;
|
|
break;
|
|
case 'j':
|
|
rank = RNK_INTMAX;
|
|
break;
|
|
case 'z':
|
|
rank = RNK_SIZE_T;
|
|
break;
|
|
case 't':
|
|
rank = RNK_PTRDIFF_T;
|
|
break;
|
|
case 'L':
|
|
case 'q':
|
|
rank += 2;
|
|
break;
|
|
default:
|
|
{
|
|
/* Output modifiers - terminal sequences */
|
|
|
|
/* Next state will be normal */
|
|
state = ST_NORMAL;
|
|
|
|
/* Canonicalize rank */
|
|
if (rank < RNK_MIN)
|
|
{
|
|
rank = RNK_MIN;
|
|
}
|
|
else if (rank > RNK_MAX)
|
|
{
|
|
rank = RNK_MAX;
|
|
}
|
|
|
|
switch (ch)
|
|
{
|
|
case 'p':
|
|
{
|
|
/* Pointer */
|
|
base = 16;
|
|
prec = (CHAR_BIT*sizeof(void *)+3)/4;
|
|
flags |= FL_HASH;
|
|
val = (uintmax_t)(uintptr_t)
|
|
va_arg(ap, void *);
|
|
goto is_integer;
|
|
}
|
|
case 'd':
|
|
case 'i':
|
|
{
|
|
/* Signed decimal output */
|
|
base = 10;
|
|
flags |= FL_SIGNED;
|
|
switch (rank)
|
|
{
|
|
case RNK_CHAR:
|
|
/* Yes, all these casts are
|
|
needed... */
|
|
val = (uintmax_t)(intmax_t)(signed char)
|
|
va_arg(ap, signed int);
|
|
break;
|
|
case RNK_SHORT:
|
|
val = (uintmax_t)(intmax_t)(signed short)
|
|
va_arg(ap, signed int);
|
|
break;
|
|
case RNK_INT:
|
|
val = (uintmax_t)(intmax_t)
|
|
va_arg(ap, signed int);
|
|
break;
|
|
case RNK_LONG:
|
|
val = (uintmax_t)(intmax_t)
|
|
va_arg(ap, signed long);
|
|
break;
|
|
case RNK_LONGLONG:
|
|
val = (uintmax_t)(intmax_t)
|
|
va_arg(ap, signed long long);
|
|
break;
|
|
}
|
|
goto is_integer;
|
|
}
|
|
case 'o':
|
|
{
|
|
/* Octal */
|
|
base = 8;
|
|
goto is_unsigned;
|
|
}
|
|
case 'u':
|
|
{
|
|
/* Unsigned decimal */
|
|
base = 10;
|
|
goto is_unsigned;
|
|
}
|
|
case 'X':
|
|
{
|
|
/* Upper case hexadecimal */
|
|
flags |= FL_UPPER;
|
|
/* fall through */
|
|
}
|
|
case 'x':
|
|
{
|
|
/* Hexadecimal */
|
|
base = 16;
|
|
goto is_unsigned;
|
|
}
|
|
is_unsigned:
|
|
{
|
|
switch (rank) {
|
|
case RNK_CHAR:
|
|
val = (uintmax_t)(unsigned char)
|
|
va_arg(ap, unsigned int);
|
|
break;
|
|
case RNK_SHORT:
|
|
val = (uintmax_t)(unsigned short)
|
|
va_arg(ap, unsigned int);
|
|
break;
|
|
case RNK_INT:
|
|
val = (uintmax_t)
|
|
va_arg(ap, unsigned int);
|
|
break;
|
|
case RNK_LONG:
|
|
val = (uintmax_t)
|
|
va_arg(ap, unsigned long);
|
|
break;
|
|
case RNK_LONGLONG:
|
|
val = (uintmax_t)
|
|
va_arg(ap, unsigned long long);
|
|
break;
|
|
}
|
|
goto is_integer;
|
|
}
|
|
is_integer:
|
|
{
|
|
sz = format_int(q, (o < n) ? n - o : 0,
|
|
val, flags, base, width, prec);
|
|
q += sz;
|
|
o += sz;
|
|
break;
|
|
}
|
|
case 'c':
|
|
{
|
|
/* Character */
|
|
carg = (char)va_arg(ap, int);
|
|
sarg = &carg;
|
|
slen = 1;
|
|
goto is_string;
|
|
}
|
|
case 's':
|
|
{
|
|
/* String */
|
|
sarg = va_arg(ap, const char *);
|
|
sarg = sarg ? sarg : "(null)";
|
|
slen = prec != -1 ? strnlen(sarg, prec)
|
|
: strlen(sarg);
|
|
goto is_string;
|
|
}
|
|
case 'm':
|
|
{
|
|
/* glibc error string */
|
|
sarg = strerror(errno);
|
|
slen = strlen(sarg);
|
|
goto is_string;
|
|
}
|
|
is_string:
|
|
{
|
|
char sch;
|
|
int i;
|
|
|
|
if (prec != -1 && slen > prec)
|
|
{
|
|
slen = prec;
|
|
}
|
|
|
|
if (width > slen && !(flags & FL_MINUS))
|
|
{
|
|
char pad = (flags & FL_ZERO) ? '0' : ' ';
|
|
while (width > slen)
|
|
{
|
|
EMIT(pad);
|
|
width--;
|
|
}
|
|
}
|
|
for (i = slen; i; i--)
|
|
{
|
|
sch = *sarg++;
|
|
EMIT(sch);
|
|
}
|
|
if (width > slen && (flags & FL_MINUS))
|
|
{
|
|
while (width > slen)
|
|
{
|
|
EMIT(' ');
|
|
width--;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case 'A':
|
|
{
|
|
base = 16;
|
|
flags |= FL_UPPER;
|
|
goto is_double;
|
|
}
|
|
case 'E':
|
|
case 'G':
|
|
{
|
|
/* currently not supported, fall */
|
|
}
|
|
case 'F':
|
|
{
|
|
base = 10;
|
|
flags |= FL_UPPER;
|
|
goto is_double;
|
|
}
|
|
case 'a':
|
|
{
|
|
base = 16;
|
|
goto is_double;
|
|
}
|
|
case 'e':
|
|
case 'g':
|
|
{
|
|
/* currently not supported, fall */
|
|
}
|
|
case 'f':
|
|
{
|
|
base = 10;
|
|
goto is_double;
|
|
}
|
|
is_double:
|
|
{
|
|
double dval;
|
|
|
|
dval = va_arg(ap, double);
|
|
if (isinf(dval))
|
|
{
|
|
if (isgreater(dval, 0.0))
|
|
{
|
|
sarg = flags & FL_UPPER ? "INF" : "inf";
|
|
}
|
|
else
|
|
{
|
|
sarg = flags & FL_UPPER ? "-INF" : "-inf";
|
|
}
|
|
slen = strlen(sarg);
|
|
goto is_string;
|
|
}
|
|
if (isnan(dval))
|
|
{
|
|
sarg = flags & FL_UPPER ? "NAN" : "nan";
|
|
slen = strlen(sarg);
|
|
goto is_string;
|
|
}
|
|
sz = format_double(q, (o < n) ? n - o : 0,
|
|
dval, flags, base, width, prec);
|
|
q += sz;
|
|
o += sz;
|
|
break;
|
|
}
|
|
case 'n':
|
|
{
|
|
/* Output the number of characters written */
|
|
switch (rank)
|
|
{
|
|
case RNK_CHAR:
|
|
*va_arg(ap, signed char *) = o;
|
|
break;
|
|
case RNK_SHORT:
|
|
*va_arg(ap, signed short *) = o;
|
|
break;
|
|
case RNK_INT:
|
|
*va_arg(ap, signed int *) = o;
|
|
break;
|
|
case RNK_LONG:
|
|
*va_arg(ap, signed long *) = o;
|
|
break;
|
|
case RNK_LONGLONG:
|
|
*va_arg(ap, signed long long *) = o;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
printf_hook_handler_t *handler;
|
|
|
|
handler = hooks->get(hooks, (void*)(uintptr_t)ch);
|
|
if (handler)
|
|
{
|
|
const void *args[ARGS_MAX];
|
|
int i, iargs[ARGS_MAX];
|
|
void *pargs[ARGS_MAX];
|
|
printf_hook_spec_t spec = {
|
|
.hash = flags & FL_HASH,
|
|
.plus = flags & FL_PLUS,
|
|
.minus = flags & FL_MINUS,
|
|
.width = width,
|
|
};
|
|
printf_hook_data_t data = {
|
|
.q = q,
|
|
.n = (o < n) ? n - o : 0,
|
|
};
|
|
|
|
for (i = 0; i < handler->numargs; i++)
|
|
{
|
|
switch (handler->argtypes[i])
|
|
{
|
|
case PRINTF_HOOK_ARGTYPE_INT:
|
|
iargs[i] = va_arg(ap, int);
|
|
args[i] = &iargs[i];
|
|
break;
|
|
case PRINTF_HOOK_ARGTYPE_POINTER:
|
|
pargs[i] = va_arg(ap, void*);
|
|
args[i] = &pargs[i];
|
|
break;
|
|
}
|
|
}
|
|
sz = handler->hook(&data, &spec, args);
|
|
q += sz;
|
|
o += sz;
|
|
}
|
|
else
|
|
{
|
|
/* Anything else, including % */
|
|
EMIT(ch);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Null-terminate the string */
|
|
if (o < n)
|
|
{
|
|
/* No overflow */
|
|
*q = '\0';
|
|
}
|
|
else if (n > 0)
|
|
{
|
|
/* Overflow - terminate at end of buffer */
|
|
buffer[n - 1] = '\0';
|
|
}
|
|
return o;
|
|
}
|
|
|
|
int builtin_printf(const char *format, ...)
|
|
{
|
|
int written;
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
written = builtin_vprintf(format, args);
|
|
va_end(args);
|
|
|
|
return written;
|
|
}
|
|
|
|
int builtin_fprintf(FILE *stream, const char *format, ...)
|
|
{
|
|
int written;
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
written = builtin_vfprintf(stream, format, args);
|
|
va_end(args);
|
|
|
|
return written;
|
|
}
|
|
|
|
int builtin_sprintf(char *str, const char *format, ...)
|
|
{
|
|
int written;
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
written = builtin_vsnprintf(str, ~(size_t)0, format, args);
|
|
va_end(args);
|
|
|
|
return written;
|
|
}
|
|
|
|
int builtin_snprintf(char *str, size_t size, const char *format, ...)
|
|
{
|
|
int written;
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
written = builtin_vsnprintf(str, size, format, args);
|
|
va_end(args);
|
|
|
|
return written;
|
|
}
|
|
|
|
int builtin_asprintf(char **str, const char *format, ...)
|
|
{
|
|
int written;
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
written = builtin_vasprintf(str, format, args);
|
|
va_end(args);
|
|
|
|
return written;
|
|
}
|
|
|
|
int builtin_vprintf(const char *format, va_list ap)
|
|
{
|
|
return builtin_vfprintf(stdout, format, ap);
|
|
}
|
|
|
|
#ifdef WIN32
|
|
/**
|
|
* Set TTY color on Windows consoles
|
|
*/
|
|
static void set_console_color(HANDLE handle, int color)
|
|
{
|
|
CONSOLE_SCREEN_BUFFER_INFO info;
|
|
struct {
|
|
/* escape code */
|
|
int color;
|
|
/* windows console color combination */
|
|
WORD attributes;
|
|
} maps[] = {
|
|
{ 30, 0 },
|
|
{ 31, FOREGROUND_RED },
|
|
{ 32, FOREGROUND_GREEN },
|
|
{ 33, FOREGROUND_GREEN | FOREGROUND_RED },
|
|
{ 34, FOREGROUND_BLUE | FOREGROUND_INTENSITY },
|
|
{ 35, FOREGROUND_RED | FOREGROUND_BLUE },
|
|
{ 36, FOREGROUND_GREEN | FOREGROUND_BLUE },
|
|
{ 37, FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_RED },
|
|
{ 39, FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_RED },
|
|
{ 40, 0 },
|
|
{ 41, BACKGROUND_RED },
|
|
{ 42, BACKGROUND_GREEN },
|
|
{ 43, BACKGROUND_GREEN | BACKGROUND_RED },
|
|
{ 44, BACKGROUND_BLUE },
|
|
{ 45, BACKGROUND_RED | BACKGROUND_BLUE },
|
|
{ 46, BACKGROUND_GREEN | BACKGROUND_BLUE },
|
|
{ 47, BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_RED },
|
|
{ 49, 0 },
|
|
};
|
|
int i;
|
|
|
|
if (GetConsoleScreenBufferInfo(handle, &info))
|
|
{
|
|
if (color < 40)
|
|
{
|
|
info.wAttributes &= ~(FOREGROUND_BLUE | FOREGROUND_GREEN |
|
|
FOREGROUND_RED | FOREGROUND_INTENSITY);
|
|
}
|
|
else
|
|
{
|
|
info.wAttributes &= ~(BACKGROUND_BLUE | BACKGROUND_GREEN |
|
|
BACKGROUND_RED | BACKGROUND_INTENSITY);
|
|
}
|
|
for (i = 0; i < countof(maps); i++)
|
|
{
|
|
if (maps[i].color == color)
|
|
{
|
|
info.wAttributes |= maps[i].attributes;
|
|
SetConsoleTextAttribute(handle, info.wAttributes);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int builtin_vfprintf(FILE *stream, const char *format, va_list ap)
|
|
{
|
|
char buf[PRINTF_BUF_LEN], *pos, *stop;
|
|
HANDLE handle;
|
|
int len, total;
|
|
DWORD clen, mode;
|
|
|
|
total = len = builtin_vsnprintf(buf, sizeof(buf), format, ap);
|
|
switch (fileno(stream))
|
|
{
|
|
case 1:
|
|
handle = GetStdHandle(STD_OUTPUT_HANDLE);
|
|
break;
|
|
case 2:
|
|
handle = GetStdHandle(STD_ERROR_HANDLE);
|
|
break;
|
|
default:
|
|
handle = INVALID_HANDLE_VALUE;
|
|
break;
|
|
}
|
|
/* GetConsoleMode fails if output redirected */
|
|
if (handle == INVALID_HANDLE_VALUE || !GetConsoleMode(handle, &mode))
|
|
{
|
|
return fwrite(buf, 1, len, stream);
|
|
}
|
|
while (len)
|
|
{
|
|
pos = &buf[total - len];
|
|
if (len > 4)
|
|
{
|
|
if (pos[0] == '\e' && pos[1] == '[' && pos[4] == 'm')
|
|
{
|
|
if (isdigit(pos[3]))
|
|
{
|
|
if (pos[2] == '3' || pos[2] == '4')
|
|
{
|
|
set_console_color(handle,
|
|
(pos[2] - '0') * 10 + pos[3] - '0');
|
|
len -= 5;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
stop = memchr(pos + 1, '\e', len);
|
|
if (stop)
|
|
{
|
|
clen = stop - pos;
|
|
}
|
|
else
|
|
{
|
|
clen = len;
|
|
}
|
|
if (clen && !WriteConsole(handle, pos, clen, &clen, NULL))
|
|
{
|
|
break;
|
|
}
|
|
len -= clen;
|
|
}
|
|
return total - len;
|
|
}
|
|
|
|
#else /* !WIN32 */
|
|
|
|
int builtin_vfprintf(FILE *stream, const char *format, va_list ap)
|
|
{
|
|
char buf[PRINTF_BUF_LEN];
|
|
int len;
|
|
|
|
len = builtin_vsnprintf(buf, sizeof(buf), format, ap);
|
|
return fwrite(buf, 1, len, stream);
|
|
}
|
|
|
|
#endif /* !WIN32 */
|
|
|
|
int builtin_vsprintf(char *str, const char *format, va_list ap)
|
|
{
|
|
return builtin_vsnprintf(str, ~(size_t)0, format, ap);
|
|
}
|
|
|
|
int builtin_vasprintf(char **str, const char *format, va_list ap)
|
|
{
|
|
char buf[PRINTF_BUF_LEN];
|
|
int len;
|
|
|
|
len = builtin_vsnprintf(buf, sizeof(buf), format, ap);
|
|
*str = strdup(buf);
|
|
return len;
|
|
}
|
|
|
|
METHOD(printf_hook_t, destroy, void,
|
|
private_printf_hook_t *this)
|
|
{
|
|
enumerator_t *enumerator;
|
|
printf_hook_handler_t *handler;
|
|
|
|
enumerator = hooks->create_enumerator(hooks);
|
|
while (enumerator->enumerate(enumerator, NULL, &handler))
|
|
{
|
|
free(handler);
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
|
|
hooks->destroy(hooks);
|
|
|
|
free(this);
|
|
}
|
|
|
|
/*
|
|
* see header file
|
|
*/
|
|
printf_hook_t *printf_hook_create()
|
|
{
|
|
private_printf_hook_t *this;
|
|
|
|
INIT(this,
|
|
.public = {
|
|
.add_handler = _add_handler,
|
|
.destroy = _destroy,
|
|
},
|
|
);
|
|
|
|
hooks = hashtable_create(hashtable_hash_ptr, hashtable_equals_ptr, 8);
|
|
|
|
return &this->public;
|
|
}
|