139 lines
2.4 KiB
C
139 lines
2.4 KiB
C
/*
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* $Id: awk.h,v 1.15 2006-01-19 16:28:21 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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#include <xp/awk/tree.h>
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enum
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{
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XP_AWK_ENOERR,
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XP_AWK_ENOMEM, /* out of memory */
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XP_AWK_ESRCOP,
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XP_AWK_ESRCCL,
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XP_AWK_ESRCDT, /* error in reading source */
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XP_AWK_ELXCHR, /* lexer came accross an wrong character */
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XP_AWK_ELXUNG, /* lexer failed to unget a character */
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XP_AWK_EENDSRC, /* unexpected end of source */
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XP_AWK_ELBRACE, /* left brace expected */
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XP_AWK_ELPAREN, /* left parenthesis expected */
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XP_AWK_ERPAREN, /* right parenthesis expected */
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XP_AWK_ERBRACK, /* right bracket expected */
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XP_AWK_ECOMMA, /* comma expected */
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XP_AWK_ESEMICOLON, /* semicolon expected */
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XP_AWK_EEXPR, /* expression expected */
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XP_AWK_EWHILE, /* keyword 'while' is expected */
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XP_AWK_EASSIGN /* assignment statement expected */
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};
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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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/*
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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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/* options */
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enum
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{
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XP_AWK_ASSIGN_ONLY /* a non-assignment expression cannot be used as a statement */
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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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int opt;
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/* parse tree */
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xp_awk_node_t* tree;
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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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/* source buffer management */
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struct {
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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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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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#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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/*
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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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#ifdef __cplusplus
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}
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#endif
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#endif
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