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75 lines
2.9 KiB
C
75 lines
2.9 KiB
C
/***********************************************************************
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* *
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* This software is part of the ast package *
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* Copyright (c) 1982-2011 AT&T Intellectual Property *
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* Copyright (c) 2020-2022 Contributors to ksh 93u+m *
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* and is licensed under the *
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* Eclipse Public License, Version 1.0 *
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* by AT&T Intellectual Property *
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* *
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* A copy of the License is available at *
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* http://www.eclipse.org/org/documents/epl-v10.html *
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* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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* *
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* Information and Software Systems Research *
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* AT&T Research *
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* Florham Park NJ *
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* *
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* David Korn <dgk@research.att.com> *
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* *
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***********************************************************************/
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#ifndef HIST_VERSION
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/*
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* Interface for history mechanism
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* written by David Korn
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*
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*/
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#include <ast.h>
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#define HIST_CHAR '!'
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#define HIST_VERSION 1 /* history file format version no. */
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typedef struct
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{
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Sfdisc_t histdisc; /* discipline for history */
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Sfio_t *histfp; /* history file stream pointer */
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char *histname; /* name of history file */
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int32_t histind; /* current command number index */
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int histsize; /* number of accessible history lines */
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#ifdef _HIST_PRIVATE
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_HIST_PRIVATE
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#endif /* _HIST_PRIVATE */
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} History_t;
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typedef struct
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{
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int hist_command;
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int hist_line;
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int hist_char;
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} Histloc_t;
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/* the following are readonly */
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extern const char hist_fname[];
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extern int _Hist;
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#define hist_min(hp) ((_Hist=((int)((hp)->histind-(hp)->histsize)))>=0?_Hist:0)
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#define hist_max(hp) ((int)((hp)->histind))
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/* these are the history interface routines */
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extern int sh_histinit(void);
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extern void hist_cancel(History_t*);
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extern void hist_close(History_t*);
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extern int hist_copy(char*, int, int, int);
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extern void hist_eof(History_t*);
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extern Histloc_t hist_find(History_t*,char*,int, int, int);
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extern void hist_flush(History_t*);
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extern void hist_list(History_t*,Sfio_t*, off_t, int, char*);
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extern int hist_match(History_t*,off_t, char*, int*);
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extern off_t hist_tell(History_t*,int);
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extern off_t hist_seek(History_t*,int);
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extern char *hist_word(char*, int, int);
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#if SHOPT_ESH
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extern Histloc_t hist_locate(History_t*,int, int, int);
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#endif /* SHOPT_ESH */
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#endif /* HIST_VERSION */
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