| # Python bindings for Yasm: Pyrex input file for expr.h |
| # |
| # Copyright (C) 2006 Michael Urman, Peter Johnson |
| # |
| # 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 OTHER 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 OTHER 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. |
| |
| cdef extern from *: |
| # Defined as a macro, so not automatically brought in by pyxelator |
| cdef yasm_expr *yasm_expr_simplify(yasm_expr *e, int calc_bc_dist) |
| |
| import operator |
| __op = {} |
| for ops, operation in [ |
| ((operator.__add__, operator.add, '+'), YASM_EXPR_ADD), |
| ((operator.__and__, operator.and_, '&'), YASM_EXPR_AND), |
| ((operator.__div__, operator.div, '/'), YASM_EXPR_SIGNDIV), |
| ((operator.__floordiv__, operator.floordiv, '//'), YASM_EXPR_SIGNDIV), |
| ((operator.__ge__, operator.ge, '>='), YASM_EXPR_GE), |
| ((operator.__gt__, operator.gt, '>'), YASM_EXPR_GT), |
| ((operator.__inv__, operator.inv, '~'), YASM_EXPR_NOT), |
| ((operator.__invert__, operator.invert), YASM_EXPR_NOT), |
| ((operator.__le__, operator.le, '<='), YASM_EXPR_LE), |
| ((operator.__lt__, operator.lt, '<'), YASM_EXPR_LT), |
| ((operator.__mod__, operator.mod, '%'), YASM_EXPR_SIGNMOD), |
| ((operator.__mul__, operator.mul, '*'), YASM_EXPR_MUL), |
| ((operator.__neg__, operator.neg), YASM_EXPR_NEG), |
| ((operator.__not__, operator.not_, 'not'), YASM_EXPR_LNOT), |
| ((operator.__or__, operator.or_, '|'), YASM_EXPR_OR), |
| ((operator.__sub__, operator.sub, '-'), YASM_EXPR_SUB), |
| ((operator.__xor__, operator.xor, '^'), YASM_EXPR_XOR), |
| ]: |
| for op in ops: |
| __op[op] = operation |
| |
| del operator, op, ops, operation |
| |
| cdef object __make_expression(yasm_expr *expr): |
| return Expression(__pass_voidp(expr, Expression)) |
| |
| cdef class Expression: |
| cdef yasm_expr *expr |
| |
| def __new__(self, op, *args, **kwargs): |
| self.expr = NULL |
| |
| if isinstance(op, Expression): |
| self.expr = yasm_expr_copy((<Expression>op).expr) |
| return |
| if PyCObject_Check(op): |
| self.expr = <yasm_expr *>__get_voidp(op, Expression) |
| return |
| |
| cdef size_t numargs |
| cdef unsigned long line |
| |
| op = __op.get(op, op) |
| numargs = len(args) |
| line = kwargs.get('line', 0) |
| |
| if numargs == 0 or numargs > 2: |
| raise NotImplementedError |
| elif numargs == 2: |
| self.expr = yasm_expr_create(op, self.__new_item(args[0]), |
| self.__new_item(args[1]), line) |
| else: |
| self.expr = yasm_expr_create(op, self.__new_item(args[0]), NULL, |
| line) |
| |
| cdef yasm_expr__item* __new_item(self, value) except NULL: |
| cdef yasm_expr__item *retval |
| if isinstance(value, Expression): |
| return yasm_expr_expr(yasm_expr_copy((<Expression>value).expr)) |
| #elif isinstance(value, Symbol): |
| # return yasm_expr_sym((<Symbol>value).sym) |
| #elif isinstance(value, Register): |
| # return yasm_expr_reg((<Register>value).reg) |
| elif isinstance(value, FloatNum): |
| return yasm_expr_float(yasm_floatnum_copy((<FloatNum>value).flt)) |
| elif isinstance(value, IntNum): |
| return yasm_expr_int(yasm_intnum_copy((<IntNum>value).intn)) |
| else: |
| try: |
| intnum = IntNum(value) |
| except: |
| raise ValueError("Invalid item value type '%s'" % type(value)) |
| else: |
| retval = yasm_expr_int((<IntNum>intnum).intn) |
| (<IntNum>intnum).intn = NULL |
| return retval |
| |
| def __dealloc__(self): |
| if self.expr != NULL: yasm_expr_destroy(self.expr) |
| |
| def simplify(self, calc_bc_dist=False): |
| self.expr = yasm_expr_simplify(self.expr, calc_bc_dist) |
| |
| def extract_segoff(self): |
| cdef yasm_expr *retval |
| retval = yasm_expr_extract_segoff(&self.expr) |
| if retval == NULL: |
| raise ValueError("not a SEG:OFF expression") |
| return __make_expression(retval) |
| |
| def extract_wrt(self): |
| cdef yasm_expr *retval |
| retval = yasm_expr_extract_wrt(&self.expr) |
| if retval == NULL: |
| raise ValueError("not a WRT expression") |
| return __make_expression(retval) |
| |
| def get_intnum(self, calc_bc_dist=False): |
| cdef yasm_intnum *retval |
| retval = yasm_expr_get_intnum(&self.expr, calc_bc_dist) |
| if retval == NULL: |
| raise ValueError("not an intnum expression") |
| return __make_intnum(yasm_intnum_copy(retval)) |
| |