180 lines
3.0 KiB
C
180 lines
3.0 KiB
C
/*
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* $Id: awk.h,v 1.37 2006-03-27 11:43:17 bacon Exp $
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*/
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#ifndef _XP_AWK_AWK_H_
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#define _XP_AWK_AWK_H_
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#ifdef __STAND_ALONE
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#include <xp/awk/sa.h>
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#else
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#include <xp/types.h>
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#include <xp/macros.h>
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#include <xp/bas/str.h>
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#endif
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/*
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* TYPE: xp_awk_t
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*/
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typedef struct xp_awk_t xp_awk_t;
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typedef struct xp_awk_chain_t xp_awk_chain_t;
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#include <xp/awk/err.h>
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#include <xp/awk/tree.h>
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#include <xp/awk/tab.h>
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#include <xp/awk/map.h>
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#include <xp/awk/val.h>
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#include <xp/awk/run.h>
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/*
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* TYPE: xp_awk_io_t
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*/
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typedef xp_ssize_t (*xp_awk_io_t) (
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int cmd, void* arg, xp_char_t* data, xp_size_t count);
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/* io function commands */
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enum
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{
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XP_AWK_IO_OPEN,
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XP_AWK_IO_CLOSE,
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XP_AWK_IO_DATA
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};
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/* parse options */
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enum
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{
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XP_AWK_IMPLICIT = (1 << 0), /* allow undeclared variables */
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XP_AWK_EXPLICIT = (1 << 1), /* variable requires explicit declaration */
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XP_AWK_UNIQUE = (1 << 2), /* a function name should not coincide to be a variable name */
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XP_AWK_SHADING = (1 << 3), /* allow variable shading */
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XP_AWK_SHIFT = (1 << 4) /* support shift operators */
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};
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struct xp_awk_t
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{
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/* options */
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struct
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{
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int parse;
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int run;
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} opt;
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/* io functions */
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xp_awk_io_t src_func;
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xp_awk_io_t in_func;
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xp_awk_io_t out_func;
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void* src_arg;
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void* in_arg;
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void* out_arg;
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/* parse tree */
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struct
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{
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xp_size_t nglobals;
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xp_awk_map_t funcs;
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xp_awk_nde_t* begin;
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xp_awk_nde_t* end;
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xp_awk_chain_t* chain;
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xp_awk_chain_t* chain_tail;
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} tree;
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/* temporary information that the parser needs */
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struct
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{
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xp_awk_tab_t globals;
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xp_awk_tab_t locals;
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xp_awk_tab_t params;
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xp_size_t nlocals_max;
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} parse;
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/* run-time data structure */
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struct
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{
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xp_awk_map_t named;
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void** stack;
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xp_size_t stack_top;
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xp_size_t stack_base;
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xp_size_t stack_limit;
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int exit_level;
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xp_awk_val_int_t* icache[100]; // TODO: ...
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xp_size_t icache_count;
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} run;
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/* source buffer management */
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struct
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{
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xp_cint_t curc;
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xp_cint_t ungotc[5];
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xp_size_t ungotc_count;
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} lex;
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/* token */
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struct
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{
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int type;
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xp_str_t name;
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} token;
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/* housekeeping */
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int errnum;
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xp_bool_t __dynamic;
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};
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struct xp_awk_chain_t
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{
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xp_awk_nde_t* pattern;
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xp_awk_nde_t* action;
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xp_awk_chain_t* next;
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* FUNCTION: xp_awk_open
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*/
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xp_awk_t* xp_awk_open (xp_awk_t* awk);
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/*
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* FUNCTION: xp_awk_close
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*/
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int xp_awk_close (xp_awk_t* awk);
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int xp_awk_geterrnum (xp_awk_t* awk);
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const xp_char_t* xp_awk_geterrstr (xp_awk_t* awk);
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/*
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* FUNCTION: xp_awk_clear
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*/
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void xp_awk_clear (xp_awk_t* awk);
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/*
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* FUNCTION: xp_awk_attsrc
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*/
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int xp_awk_attsrc (xp_awk_t* awk, xp_awk_io_t src, void* arg);
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/*
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* FUNCTION: xp_awk_detsrc
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*/
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int xp_awk_detsrc (xp_awk_t* awk);
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int xp_awk_attin (xp_awk_t* awk, xp_awk_io_t in, void* arg);
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int xp_awk_detin (xp_awk_t* awk);
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int xp_awk_attout (xp_awk_t* awk, xp_awk_io_t out, void* arg);
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int xp_awk_detout (xp_awk_t* awk);
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int xp_awk_parse (xp_awk_t* awk);
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int xp_awk_run (xp_awk_t* awk);
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#ifdef __cplusplus
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}
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#endif
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#endif
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