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      1 # Python bindings for Yasm: Pyrex input file for value.h
      2 #
      3 #  Copyright (C) 2006  Michael Urman, Peter Johnson
      4 #
      5 # Redistribution and use in source and binary forms, with or without
      6 # modification, are permitted provided that the following conditions
      7 # are met:
      8 # 1. Redistributions of source code must retain the above copyright
      9 #    notice, this list of conditions and the following disclaimer.
     10 # 2. Redistributions in binary form must reproduce the above copyright
     11 #    notice, this list of conditions and the following disclaimer in the
     12 #    documentation and/or other materials provided with the distribution.
     13 #
     14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS''
     15 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     17 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE
     18 # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     19 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     20 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     21 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     22 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     23 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     24 # POSSIBILITY OF SUCH DAMAGE.
     25 
     26 cdef class Value:
     27     cdef yasm_value value
     28     def __cinit__(self, value=None, size=None):
     29         cdef unsigned int sz
     30         if size is None:
     31             sz = 0
     32         else:
     33             sz = size;
     34 
     35         yasm_value_initialize(&self.value, NULL, sz)
     36         if value is None:
     37             pass
     38         elif isinstance(value, Expression):
     39             yasm_value_initialize(&self.value,
     40                                   yasm_expr_copy((<Expression>value).expr), sz)
     41         elif isinstance(value, Symbol):
     42             yasm_value_init_sym(&self.value, (<Symbol>value).sym, sz)
     43         else:
     44             raise TypeError("Invalid value type '%s'" % type(value))
     45 
     46     def __dealloc__(self):
     47         yasm_value_delete(&self.value)
     48 
     49     def finalize(self, precbc=None):
     50         if precbc is None:
     51             return yasm_value_finalize(&self.value, NULL)
     52         elif isinstance(precbc, Bytecode):
     53             return yasm_value_finalize(&self.value, (<Bytecode>precbc).bc)
     54         else:
     55             raise TypeError("Invalid precbc type '%s'" % type(precbc))
     56 
     57