135 lines
5.8 KiB
C
135 lines
5.8 KiB
C
/*****************************************************************************/
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/* */
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/* gentype.h */
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/* */
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/* Generic data type encoding */
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/* */
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/* */
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/* */
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/* (C) 2011, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef GENTYPE_H
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#define GENTYPE_H
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/*****************************************************************************/
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/* Forwards */
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/*****************************************************************************/
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struct StrBuf;
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* The data type used to encode a generic type */
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typedef unsigned char* gt_string;
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/* Termination, so we can use string functions to handle type strings */
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#define GT_END 0x00U
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/* Size of a data type */
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#define GT_SIZE_1 0x00U
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#define GT_SIZE_2 0x01U
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#define GT_SIZE_3 0x02U
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#define GT_SIZE_4 0x03U
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#define GT_SIZE_MASK 0x07U
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#define GT_GET_SIZE(x) (((x) & GT_SIZE_MASK) + 1U)
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/* Sign of the data type */
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#define GT_UNSIGNED 0x00U
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#define GT_SIGNED 0x08U
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#define GT_SIGN_MASK 0x08U
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#define GT_HAS_SIGN(x) (((x) & GT_SIZE_MASK) == GT_SIGNED)
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/* Byte order */
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#define GT_LITTLE_ENDIAN 0x00U
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#define GT_BIG_ENDIAN 0x10U
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#define GT_BYTEORDER_MASK 0x10U
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#define GT_IS_LITTLE_ENDIAN(x) (((x) & GT_BYTEORDER_MASK) == GT_LITTLE_ENDIAN)
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#define GT_IS_BIG_ENDIAN(x) (((x) & GT_BYTEORDER_MASK) == GT_BIG_ENDIAN)
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/* Type of the data. Since we want to have zero as a terminator, we must
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* introduce one thing that cannot be zero for normal data. This is the
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* type.
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*/
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#define GT_INTEGER 0x20U
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#define GT_POINTER 0x40U
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#define GT_FLOAT 0x60U
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#define GT_ARRAY 0x80U
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#define GT_FUNCTION 0xA0U
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#define GT_STRUCT 0xC0U
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#define GT_UNION 0xE0U
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#define GT_MASK 0xE0U
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#define GT_GET_TYPE(x) ((x) & GT_TYPE_MASK)
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#define GT_IS_INTEGER(x) (GT_GET_TYPE(x) == GT_INTEGER)
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#define GT_IS_POINTER(x) (GT_GET_TYPE(x) == GT_POINTER)
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#define GT_IS_FLOAT(x) (GT_GET_TYPE(x) == GT_FLOAT)
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#define GT_IS_ARRAY(x) (GT_GET_TYPE(x) == GT_ARRAY)
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#define GT_IS_FUNCTION(x) (GT_GET_TYPE(x) == GT_FUNCTION)
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#define GT_IS_STRUCT(x) (GT_GET_TYPE(x) == GT_STRUCT)
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#define GT_IS_UNION(x) (GT_GET_TYPE(x) == GT_UNION)
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/* Combined values for the 6502 family */
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#define GT_BYTE (GT_INTEGER | GT_LITTLE_ENDIAN | GT_UNSIGNED | GT_SIZE_1)
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#define GT_WORD (GT_INTEGER | GT_LITTLE_ENDIAN | GT_UNSIGNED | GT_SIZE_2)
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#define GT_DWORD (GT_INTEGER | GT_LITTLE_ENDIAN | GT_UNSIGNED | GT_SIZE_4)
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#define GT_DBYTE (GT_POINTER | GT_BIG_ENDIAN | GT_UNSIGNED | GT_SIZE_2)
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#define GT_PTR (GT_POINTER | GT_LITTLE_ENDIAN | GT_UNSIGNED | GT_SIZE_2)
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#define GT_FAR_PTR (GT_POINTER | GT_LITTLE_ENDIAN | GT_UNSIGNED | GT_SIZE_3)
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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gt_string GT_FromStrBuf (const struct StrBuf* S);
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/* Create a dynamically allocated type string from a string buffer */
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/* End of gentype.h */
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#endif
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