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mawk.zip
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TYPES.H
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C/C++ Source or Header
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1991-04-07
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/********************************************
types.h
copyright 1991, Michael D. Brennan
This is a source file for mawk, an implementation of
the Awk programming language as defined in
Aho, Kernighan and Weinberger, The AWK Programming Language,
Addison-Wesley, 1988.
See the accompaning file, LIMITATIONS, for restrictions
regarding modification and redistribution of this
program in source or binary form.
********************************************/
/* $Log: types.h,v $
* Revision 2.1 91/04/08 08:24:15 brennan
* VERSION 0.97
*
*/
/* types.h */
#ifndef TYPES_H
#define TYPES_H
#if HAVE_VOID_PTR
typedef void *PTR ;
#else
typedef char *PTR ;
#endif
#include "sizes.h"
/* CELL types */
#define C_NOINIT 0
#define C_DOUBLE 1
#define C_STRING 2
#define C_STRNUM 3
#define C_MBSTRN 4
/*could be STRNUM, has not been checked */
#define C_RE 5
#define C_SPACE 6
/* split on space */
#define C_SNULL 7
/* split on the empty string */
#define C_REPL 8
/* a replacement string '\&' changed to & */
#define C_REPLV 9
/* a vector replacement -- broken on & */
#define NUM_CELL_TYPES 10
/* these defines are used to check types for two
CELLs which are adjacent in memory */
#define TWO_NOINITS (2*(1<<C_NOINIT))
#define TWO_DOUBLES (2*(1<<C_DOUBLE))
#define TWO_STRINGS (2*(1<<C_STRING))
#define TWO_STRNUMS (2*(1<<C_STRNUM))
#define TWO_MBSTRNS (2*(1<<C_MBSTRN))
#define NOINIT_AND_DOUBLE ((1<<C_NOINIT)+(1<<C_DOUBLE))
#define NOINIT_AND_STRING ((1<<C_NOINIT)+(1<<C_STRING))
#define NOINIT_AND_STRNUM ((1<<C_NOINIT)+(1<<C_STRNUM))
#define DOUBLE_AND_STRING ((1<<C_DOUBLE)+(1<<C_STRING))
#define DOUBLE_AND_STRNUM ((1<<C_STRNUM)+(1<<C_DOUBLE))
#define STRING_AND_STRNUM ((1<<C_STRING)+(1<<C_STRNUM))
#define NOINIT_AND_MBSTRN ((1<<C_NOINIT)+(1<<C_MBSTRN))
#define DOUBLE_AND_MBSTRN ((1<<C_DOUBLE)+(1<<C_MBSTRN))
#define STRING_AND_MBSTRN ((1<<C_STRING)+(1<<C_MBSTRN))
#define STRNUM_AND_MBSTRN ((1<<C_STRNUM)+(1<<C_MBSTRN))
typedef struct {
unsigned short ref_cnt ;
unsigned short len ;
char str[4] ;
} STRING ;
typedef struct cell {
short type ;
short vcnt ; /* only used if type == C_REPLV */
PTR ptr ;
double dval ;
} CELL ;
/* all builtins are passed the evaluation stack pointer and
return its new value, here is the type */
#ifdef __STDC__
typedef CELL *(*PF_CP)(CELL *) ;
#else
typedef CELL *(*PF_CP)() ;
#endif
/* an element of code (instruction) */
typedef union {
int op ;
PTR ptr ;
} INST ;
/* a scratch buffer type */
union tbuff {
PTR ptr_buff[MAX_FIELD] ;
char string_buff[TEMP_BUFF_SZ + BUFFSZ + 1] ;
} ;
#endif