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/* $Id: exlib.h,v 1.1.1.1 2004/12/23 04:05:04 ellson Exp $ $Revision: 1.1.1.1 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#ifdef __cplusplus
extern "C" {
#endif
/*
* Glenn Fowler
* AT&T Research
*
* expression library private definitions
*/
#ifndef _EXLIB_H
#define _EXLIB_H
#include <align.h>
#include <ast.h>
typedef struct Exinput_s { /* input stack */
struct Exinput_s *next; /* next in stack */
int close; /* close fp on pop */
char *file; /* previous file */
Sfio_t *fp; /* expression file pointer */
int line; /* previous line */
int nesting; /* expression nesting level */
int peek; /* 1 char peek */
int unit; /* first frame in parse unit */
char *pushback; /* pushback buffer */
char *bp; /* expression string base */
char *pp; /* pushback pointer */
char *sp; /* expression string pointer */
} Exinput_t;
typedef struct Print_s { /* compiled printf arg node */
struct Print_s *next; /* next arg */
char *format; /* printf format for arg */
struct Exnode_s *param[3]; /* 0:width 1:precision 2:base */
struct Exnode_s *arg; /* arg to format */
} Print_t;
#define _EX_DATA_PRIVATE_ \
Exnode_t* next; /* free list link */ \
Extype_t value; /* dynamic variable value */ \
struct \
{ \
Exid_t* procedure; /* called procedure */ \
Exnode_t* args; /* actual argument list */ \
} call; /* procedure call */ \
struct \
{ \
Exnode_t* array; /* array name */ \
Exid_t* index; /* array index */ \
Exnode_t* statement; /* statement to apply */ \
} generate; /* associative array generator */ \
struct \
{ \
Exnode_t* descriptor; /* Expr_t.file index */ \
Print_t* args; /* compiler printf args */ \
} print; /* printf */ \
struct \
{ \
Exnode_t* base; /* base string */ \
Exnode_t* pat; /* pattern or start index */ \
Exnode_t* repl; /* optional replacement or end index */ \
} string; /* string builtins */ \
struct \
{ \
Exnode_t* args; /* formal arg list */ \
Exnode_t* body; /* body */ \
Dt_t* frame; /* local symbol frame */ \
int arity; /* # formal args */ \
} procedure; /* procedure args and body */ \
struct \
{ \
Exnode_t* descriptor; /* Expr_t.file index */ \
Exnode_t* format; /* format arg */ \
Exnode_t* args; /* actual args */ \
} scan; /* printf */
#define _EX_NODE_PRIVATE_ \
Exshort_t subop; /* operator qualifier */ \
Exshort_t pad_2; /* padding */
#define _EX_PROG_PRIVATE_ \
Vmalloc_t* ve; /* eval tmp region */ \
Vmalloc_t* vc; /* str_* region */ \
Dt_t* frame; /* frame symbol table */ \
Dtdisc_t symdisc; /* Expr_t.symbols discipline */ \
Exdisc_t* disc; /* user discipline */ \
Exinput_t* input; /* input stack */ \
Expr_t* program; /* previous program on stack */ \
Sfio_t* tmp; /* tmp string buffer */ \
Extype_t loopret; /* return value */ \
Exid_t main; /* main procedure */ \
char line[512]; /* last few input tokens */ \
char* linep; /* line[] pointer */ \
int eof; /* lex hit eof */ \
int errors; /* fatal error count */ \
int formals; /* parsing formal args */ \
int linewrap; /* linep wrapped around line[] */ \
int loopcount; /* break|continue|return count */ \
int loopop; /* break|continue|return op */ \
int nesting; /* exstatement() nesting */
#include <expr.h>
#include <ctype.h>
#include <error.h>
#include <sfstr.h>
#define cast excast
#define id_string (&exbuiltin[0])
#define exunlex(p,c) ((p)->linep--,(p)->input->peek=(c))
#define putcontext(p,c) (((p)->linep>=&(p)->line[sizeof((p)->line)]?(p)->linep=(p)->line,(p)->linewrap=1:0),*(p)->linep++=(c))
#define setcontext(p) ((p)->linep=(p)->line,(p)->linewrap=0)
typedef struct Switch_s { /* switch parse state */
struct Switch_s *prev; /* previous switch state */
Exnode_t *firstcase; /* first case block */
Exnode_t *lastcase; /* last case block */
Exnode_t *defcase; /* default case block */
Extype_t **base; /* label base pointer */
Extype_t **cur; /* current label pointer */
Extype_t **last; /* last label pointer */
int def; /* default label hit */
int type; /* switch test type */
} Switch_t;
typedef struct { /* associative array bucket */
Dtlink_t link; /* table link */
Extype_t key; /* key */
Extype_t value; /* value */
char name[1]; /* key name */
} Exassoc_t;
typedef struct { /* ex global state */
Exid_t *id; /* current declaration id */
int declare; /* current declaration type */
Exref_t *lastref; /* last in . reference list */
int nolabel; /* <id>':' not a label */
Exinput_t null; /* null input */
Expr_t *program; /* current program */
Exnode_t *procedure; /* current procedure */
Exref_t *refs; /* . reference list */
Switch_t *swstate; /* switch parse state */
char nullstring[1]; /* "" */
} Exstate_t;
extern Exid_t exbuiltin[];
extern const char *exversion;
extern Exstate_t expr;
extern int exparse(void); /* yacc should do this */
extern Sflong_t strToL(char *, char **);
#endif
#ifdef __cplusplus
}
#endif
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