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4c33af41ec
exception handling. There are now two layers an error or warning goes through before it hits the user: first an error is logged via yasm_error_set() (or yasm_warn_set() for a warning). Only one error may be set, whereas multiple warnings can be set (yasm_warn_set maintains a linked list). Then, calling yasm_errwarn_propagate() propagates any error and/or warning(s) to an errwarns structure and associates the errors/warnings with a line number at that time; this call also clears the pending errors/warnings and allows new ones to be set. The propagate function can safely be called when there are no pending error/warnings. In addition, there are some helper errwarn functions that allow clearing of an error/warning without propagating, getting it separately, etc. Still yet to be done: changing most/all uses of yasm_internal_error() into yasm_error_set(YASM_ERROR_ASSERTION). The main advantage this change has is making libyasm functions feel much more library like, and separating the user code line numbers from the inner function error handling (e.g. intnum create functions only needed the line number to trigger errors; this is no longer required). The set/propagate/etc functions use global data structures to avoid passing around a pointer to every function. This would need to be made thread-local data in a threaded app. Errwarns containers (that keep associated line numbers) are no longer global, so multiple source streams can be processed separately with no conflict (at least if there's only a single thread of execution). svn path=/trunk/yasm/; revision=1521
64 lines
2.9 KiB
Cython
64 lines
2.9 KiB
Cython
# Python bindings for Yasm: Pyrex input file for floatnum.h
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#
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# Copyright (C) 2006 Michael Urman, Peter Johnson
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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
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER 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 AUTHOR OR OTHER 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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cdef extern from "libyasm/floatnum.h":
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cdef void yasm_floatnum_initialize()
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cdef void yasm_floatnum_cleanup()
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cdef yasm_floatnum* yasm_floatnum_create(char *str)
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cdef yasm_floatnum* yasm_floatnum_copy(yasm_floatnum *flt)
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cdef void yasm_floatnum_destroy(yasm_floatnum *flt)
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cdef void yasm_floatnum_calc(yasm_floatnum *acc, yasm_expr_op op,
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yasm_floatnum *operand)
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cdef int yasm_floatnum_get_int(yasm_floatnum *flt, size_t *ret_val)
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cdef int yasm_floatnum_get_sized(yasm_floatnum *flt, unsigned char *ptr,
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size_t destsize, size_t valsize, size_t shift, int
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bigendian, int warn)
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cdef int yasm_floatnum_check_size(yasm_floatnum *flt, size_t size)
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cdef void yasm_floatnum_print(yasm_floatnum *flt, FILE *f)
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cdef class FloatNum:
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cdef yasm_floatnum *flt
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def __new__(self, value):
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self.flt = NULL
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if isinstance(value, FloatNum):
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self.flt = yasm_floatnum_copy((<FloatNum>value).flt)
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return
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if PyCObject_Check(value): # should check Desc
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self.flt = <yasm_floatnum *>PyCObject_AsVoidPtr(value)
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return
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if isinstance(value, float): string = str(float)
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else: string = value
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self.flt = yasm_floatnum_create(string)
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def __dealloc__(self):
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if self.flt != NULL: yasm_floatnum_destroy(self.flt)
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def __neg__(self):
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result = FloatNum(self)
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yasm_floatnum_calc((<FloatNum>result).flt, YASM_EXPR_NEG, NULL)
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return result
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def __pos__(self): return self
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