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476 lines
12 KiB
476 lines
12 KiB
/*
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* *****************************************************************************
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2018-2021 Gavin D. Howard and contributors.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* *****************************************************************************
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*
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* Definitions for bc's VM.
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*
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*/
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#ifndef BC_VM_H
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#define BC_VM_H
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#include <assert.h>
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#include <stddef.h>
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#include <limits.h>
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#include <signal.h>
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#if BC_ENABLE_NLS
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# ifdef _WIN32
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# error NLS is not supported on Windows.
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# endif // _WIN32
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#include <nl_types.h>
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#endif // BC_ENABLE_NLS
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#include <version.h>
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#include <status.h>
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#include <num.h>
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#include <parse.h>
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#include <program.h>
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#include <history.h>
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#if !BC_ENABLE_LIBRARY
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#include <file.h>
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#endif // !BC_ENABLE_LIBRARY
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#if !BC_ENABLED && !DC_ENABLED
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#error Must define BC_ENABLED, DC_ENABLED, or both
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#endif
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// CHAR_BIT must be at least 6.
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#if CHAR_BIT < 6
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#error CHAR_BIT must be at least 6.
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#endif
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#ifndef BC_ENABLE_NLS
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#define BC_ENABLE_NLS (0)
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#endif // BC_ENABLE_NLS
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#ifndef MAINEXEC
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#define MAINEXEC bc
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#endif // MAINEXEC
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#ifndef _WIN32
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#ifndef EXECPREFIX
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#define EXECPREFIX
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#endif // EXECPREFIX
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#else // _WIN32
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#undef EXECPREFIX
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#endif // _WIN32
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#define GEN_STR(V) #V
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#define GEN_STR2(V) GEN_STR(V)
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#define BC_VERSION GEN_STR2(VERSION)
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#define BC_MAINEXEC GEN_STR2(MAINEXEC)
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#define BC_BUILD_TYPE GEN_STR2(BUILD_TYPE)
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#ifndef _WIN32
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#define BC_EXECPREFIX GEN_STR2(EXECPREFIX)
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#else // _WIN32
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#define BC_EXECPREFIX ""
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#endif // _WIN32
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#if !BC_ENABLE_LIBRARY
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#if DC_ENABLED
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#define DC_FLAG_X (UINTMAX_C(1)<<0)
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#endif // DC_ENABLED
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#if BC_ENABLED
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#define BC_FLAG_W (UINTMAX_C(1)<<1)
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#define BC_FLAG_S (UINTMAX_C(1)<<2)
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#define BC_FLAG_L (UINTMAX_C(1)<<3)
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#define BC_FLAG_G (UINTMAX_C(1)<<4)
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#endif // BC_ENABLED
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#define BC_FLAG_I (UINTMAX_C(1)<<5)
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#define BC_FLAG_P (UINTMAX_C(1)<<6)
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#define BC_FLAG_R (UINTMAX_C(1)<<7)
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#define BC_FLAG_TTYIN (UINTMAX_C(1)<<8)
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#define BC_FLAG_TTY (UINTMAX_C(1)<<9)
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#define BC_TTYIN (vm.flags & BC_FLAG_TTYIN)
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#define BC_TTY (vm.flags & BC_FLAG_TTY)
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#if BC_ENABLED
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#define BC_S (vm.flags & BC_FLAG_S)
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#define BC_W (vm.flags & BC_FLAG_W)
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#define BC_L (vm.flags & BC_FLAG_L)
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#define BC_G (vm.flags & BC_FLAG_G)
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#endif // BC_ENABLED
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#if DC_ENABLED
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#define DC_X (vm.flags & DC_FLAG_X)
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#endif // DC_ENABLED
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#define BC_I (vm.flags & BC_FLAG_I)
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#define BC_P (vm.flags & BC_FLAG_P)
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#define BC_R (vm.flags & BC_FLAG_R)
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#if BC_ENABLED
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#define BC_IS_POSIX (BC_S || BC_W)
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#if DC_ENABLED
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#define BC_IS_BC (vm.name[0] != 'd')
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#define BC_IS_DC (vm.name[0] == 'd')
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#else // DC_ENABLED
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#define BC_IS_BC (1)
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#define BC_IS_DC (0)
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#endif // DC_ENABLED
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#else // BC_ENABLED
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#define BC_IS_POSIX (0)
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#define BC_IS_BC (0)
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#define BC_IS_DC (1)
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#endif // BC_ENABLED
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#if BC_ENABLED
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#define BC_USE_PROMPT (!BC_P && BC_TTY && !BC_IS_POSIX)
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#else // BC_ENABLED
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#define BC_USE_PROMPT (!BC_P && BC_TTY)
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#endif // BC_ENABLED
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#endif // !BC_ENABLE_LIBRARY
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#define BC_MAX(a, b) ((a) > (b) ? (a) : (b))
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#define BC_MIN(a, b) ((a) < (b) ? (a) : (b))
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#define BC_MAX_OBASE ((BcBigDig) (BC_BASE_POW))
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#define BC_MAX_DIM ((BcBigDig) (SIZE_MAX - 1))
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#define BC_MAX_SCALE ((BcBigDig) (BC_NUM_BIGDIG_MAX - 1))
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#define BC_MAX_STRING ((BcBigDig) (BC_NUM_BIGDIG_MAX - 1))
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#define BC_MAX_NAME BC_MAX_STRING
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#define BC_MAX_NUM BC_MAX_SCALE
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#if BC_ENABLE_EXTRA_MATH
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#define BC_MAX_RAND ((BcBigDig) (((BcRand) 0) - 1))
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#endif // BC_ENABLE_EXTRA_MATH
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#define BC_MAX_EXP ((ulong) (BC_NUM_BIGDIG_MAX))
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#define BC_MAX_VARS ((ulong) (SIZE_MAX - 1))
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#if BC_DEBUG_CODE
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#define BC_VM_JMP bc_vm_jmp(__func__)
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#else // BC_DEBUG_CODE
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#define BC_VM_JMP bc_vm_jmp()
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#endif // BC_DEBUG_CODE
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#define BC_SIG_EXC \
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BC_UNLIKELY(vm.status != (sig_atomic_t) BC_STATUS_SUCCESS || vm.sig)
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#define BC_NO_SIG_EXC \
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BC_LIKELY(vm.status == (sig_atomic_t) BC_STATUS_SUCCESS && !vm.sig)
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#ifndef NDEBUG
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#define BC_SIG_ASSERT_LOCKED do { assert(vm.sig_lock); } while (0)
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#define BC_SIG_ASSERT_NOT_LOCKED do { assert(vm.sig_lock == 0); } while (0)
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#else // NDEBUG
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#define BC_SIG_ASSERT_LOCKED
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#define BC_SIG_ASSERT_NOT_LOCKED
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#endif // NDEBUG
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#define BC_SIG_LOCK \
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do { \
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BC_SIG_ASSERT_NOT_LOCKED; \
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vm.sig_lock = 1; \
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} while (0)
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#define BC_SIG_UNLOCK \
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do { \
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BC_SIG_ASSERT_LOCKED; \
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vm.sig_lock = 0; \
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if (BC_SIG_EXC) BC_VM_JMP; \
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} while (0)
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#define BC_SIG_MAYLOCK \
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do { \
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vm.sig_lock = 1; \
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} while (0)
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#define BC_SIG_MAYUNLOCK \
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do { \
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vm.sig_lock = 0; \
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if (BC_SIG_EXC) BC_VM_JMP; \
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} while (0)
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#define BC_SIG_TRYLOCK(v) \
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do { \
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v = vm.sig_lock; \
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vm.sig_lock = 1; \
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} while (0)
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#define BC_SIG_TRYUNLOCK(v) \
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do { \
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vm.sig_lock = (v); \
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if (!(v) && BC_SIG_EXC) BC_VM_JMP; \
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} while (0)
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#define BC_SETJMP(l) \
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do { \
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sigjmp_buf sjb; \
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BC_SIG_LOCK; \
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if (sigsetjmp(sjb, 0)) { \
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assert(BC_SIG_EXC); \
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goto l; \
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} \
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bc_vec_push(&vm.jmp_bufs, &sjb); \
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BC_SIG_UNLOCK; \
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} while (0)
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#define BC_SETJMP_LOCKED(l) \
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do { \
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sigjmp_buf sjb; \
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BC_SIG_ASSERT_LOCKED; \
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if (sigsetjmp(sjb, 0)) { \
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assert(BC_SIG_EXC); \
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goto l; \
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} \
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bc_vec_push(&vm.jmp_bufs, &sjb); \
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} while (0)
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#define BC_LONGJMP_CONT \
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do { \
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BC_SIG_ASSERT_LOCKED; \
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if (!vm.sig_pop) bc_vec_pop(&vm.jmp_bufs); \
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BC_SIG_UNLOCK; \
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} while (0)
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#define BC_UNSETJMP \
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do { \
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BC_SIG_ASSERT_LOCKED; \
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bc_vec_pop(&vm.jmp_bufs); \
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} while (0)
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#define BC_LONGJMP_STOP \
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do { \
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vm.sig_pop = 0; \
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vm.sig = 0; \
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} while (0)
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#define BC_VM_BUF_SIZE (1<<12)
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#define BC_VM_STDOUT_BUF_SIZE (1<<11)
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#define BC_VM_STDERR_BUF_SIZE (1<<10)
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#define BC_VM_STDIN_BUF_SIZE (BC_VM_STDERR_BUF_SIZE - 1)
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#define BC_VM_SAFE_RESULT(r) ((r)->t >= BC_RESULT_TEMP)
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#if BC_ENABLE_LIBRARY
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#define bc_vm_error(e, l, ...) (bc_vm_handleError((e)))
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#define bc_vm_err(e) (bc_vm_handleError((e)))
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#define bc_vm_verr(e, ...) (bc_vm_handleError((e)))
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#else // BC_ENABLE_LIBRARY
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#define bc_vm_error(e, l, ...) (bc_vm_handleError((e), (l), __VA_ARGS__))
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#define bc_vm_err(e) (bc_vm_handleError((e), 0))
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#define bc_vm_verr(e, ...) (bc_vm_handleError((e), 0, __VA_ARGS__))
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#endif // BC_ENABLE_LIBRARY
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#define BC_STATUS_IS_ERROR(s) \
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((s) >= BC_STATUS_ERROR_MATH && (s) <= BC_STATUS_ERROR_FATAL)
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#define BC_VM_INVALID_CATALOG ((nl_catd) -1)
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#if BC_DEBUG_CODE
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#define BC_VM_FUNC_ENTER \
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do { \
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bc_file_printf(&vm.ferr, "Entering %s\n", __func__); \
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bc_file_flush(&vm.ferr); \
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} while (0);
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#define BC_VM_FUNC_EXIT \
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do { \
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bc_file_printf(&vm.ferr, "Leaving %s\n", __func__); \
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bc_file_flush(&vm.ferr); \
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} while (0);
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#else // BC_DEBUG_CODE
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#define BC_VM_FUNC_ENTER
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#define BC_VM_FUNC_EXIT
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#endif // BC_DEBUG_CODE
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typedef struct BcVm {
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volatile sig_atomic_t status;
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volatile sig_atomic_t sig_pop;
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#if !BC_ENABLE_LIBRARY
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BcParse prs;
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BcProgram prog;
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#endif // !BC_ENABLE_LIBRARY
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BcVec jmp_bufs;
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BcVec temps;
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#if BC_ENABLE_LIBRARY
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BcVec ctxts;
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BcVec out;
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BcRNG rng;
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BclError err;
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bool abrt;
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unsigned int refs;
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volatile sig_atomic_t running;
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#endif // BC_ENABLE_LIBRARY
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#if !BC_ENABLE_LIBRARY
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const char* file;
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const char *sigmsg;
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#endif // !BC_ENABLE_LIBRARY
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volatile sig_atomic_t sig_lock;
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volatile sig_atomic_t sig;
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#if !BC_ENABLE_LIBRARY
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uchar siglen;
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uchar read_ret;
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uint16_t flags;
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uint16_t nchars;
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uint16_t line_len;
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bool no_exit_exprs;
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bool exit_exprs;
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bool eof;
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#endif // !BC_ENABLE_LIBRARY
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BcBigDig maxes[BC_PROG_GLOBALS_LEN + BC_ENABLE_EXTRA_MATH];
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#if !BC_ENABLE_LIBRARY
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BcVec files;
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BcVec exprs;
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const char *name;
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const char *help;
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#if BC_ENABLE_HISTORY
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BcHistory history;
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#endif // BC_ENABLE_HISTORY
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BcLexNext next;
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BcParseParse parse;
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BcParseExpr expr;
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const char *func_header;
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const char *err_ids[BC_ERR_IDX_NELEMS + BC_ENABLED];
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const char *err_msgs[BC_ERR_NELEMS];
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const char *locale;
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#endif // !BC_ENABLE_LIBRARY
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BcBigDig last_base;
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BcBigDig last_pow;
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BcBigDig last_exp;
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BcBigDig last_rem;
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#if !BC_ENABLE_LIBRARY
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char *env_args_buffer;
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BcVec env_args;
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#endif // !BC_ENABLE_LIBRARY
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BcNum max;
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BcNum max2;
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BcDig max_num[BC_NUM_BIGDIG_LOG10];
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BcDig max2_num[BC_NUM_BIGDIG_LOG10];
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#if !BC_ENABLE_LIBRARY
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BcFile fout;
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BcFile ferr;
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#if BC_ENABLE_NLS
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nl_catd catalog;
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#endif // BC_ENABLE_NLS
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char *buf;
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size_t buf_len;
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#endif // !BC_ENABLE_LIBRARY
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} BcVm;
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void bc_vm_info(const char* const help);
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void bc_vm_boot(int argc, char *argv[], const char *env_len,
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const char* const env_args);
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void bc_vm_init(void);
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void bc_vm_shutdown(void);
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void bc_vm_freeTemps(void);
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#if !BC_ENABLE_HISTORY
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#define bc_vm_putchar(c, t) bc_vm_putchar(c)
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#endif // !BC_ENABLE_HISTORY
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void bc_vm_printf(const char *fmt, ...);
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void bc_vm_putchar(int c, BcFlushType type);
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size_t bc_vm_arraySize(size_t n, size_t size);
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size_t bc_vm_growSize(size_t a, size_t b);
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void* bc_vm_malloc(size_t n);
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void* bc_vm_realloc(void *ptr, size_t n);
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char* bc_vm_strdup(const char *str);
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char* bc_vm_getenv(const char* var);
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void bc_vm_getenvFree(char* var);
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#if BC_DEBUG_CODE
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void bc_vm_jmp(const char *f);
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#else // BC_DEBUG_CODE
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void bc_vm_jmp(void);
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#endif // BC_DEBUG_CODE
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#if BC_ENABLE_LIBRARY
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void bc_vm_handleError(BcErr e);
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void bc_vm_fatalError(BcErr e);
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void bc_vm_atexit(void);
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#else // BC_ENABLE_LIBRARY
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void bc_vm_handleError(BcErr e, size_t line, ...);
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#if !BC_ENABLE_LIBRARY && !BC_ENABLE_MEMCHECK
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BC_NORETURN
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#endif // !BC_ENABLE_LIBRARY && !BC_ENABLE_MEMCHECK
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void bc_vm_fatalError(BcErr e);
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int bc_vm_atexit(int status);
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#endif // BC_ENABLE_LIBRARY
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extern const char bc_copyright[];
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extern const char* const bc_err_line;
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extern const char* const bc_err_func_header;
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extern const char *bc_errs[];
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extern const uchar bc_err_ids[];
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extern const char* const bc_err_msgs[];
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extern BcVm vm;
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extern char output_bufs[BC_VM_BUF_SIZE];
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#endif // BC_VM_H
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