1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1982-2008 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * David Korn <dgk@research.att.com> * 18 * * 19 ***********************************************************************/ 20 #pragma prototyped 21 #ifndef HIST_VERSION 22 /* 23 * Interface for history mechanism 24 * written by David Korn 25 * 26 */ 27 28 #include <ast.h> 29 30 #define HIST_CHAR '!' 31 #define HIST_VERSION 1 /* history file format version no. */ 32 33 typedef struct 34 { 35 Sfdisc_t histdisc; /* discipline for history */ 36 Sfio_t *histfp; /* history file stream pointer */ 37 char *histname; /* name of history file */ 38 int32_t histind; /* current command number index */ 39 int histsize; /* number of accessible history lines */ 40 #ifdef _HIST_PRIVATE 41 _HIST_PRIVATE 42 #endif /* _HIST_PRIVATE */ 43 } History_t; 44 45 typedef struct 46 { 47 int hist_command; 48 int hist_line; 49 int hist_char; 50 } Histloc_t; 51 52 /* the following are readonly */ 53 extern const char hist_fname[]; 54 55 extern int _Hist; 56 #define hist_min(hp) ((_Hist=((int)((hp)->histind-(hp)->histsize)))>=0?_Hist:0) 57 #define hist_max(hp) ((int)((hp)->histind)) 58 /* these are the history interface routines */ 59 extern int sh_histinit(void *); 60 extern void hist_cancel(History_t*); 61 extern void hist_close(History_t*); 62 extern int hist_copy(char*, int, int, int); 63 extern void hist_eof(History_t*); 64 extern Histloc_t hist_find(History_t*,char*,int, int, int); 65 extern void hist_flush(History_t*); 66 extern void hist_list(History_t*,Sfio_t*, off_t, int, char*); 67 extern int hist_match(History_t*,off_t, char*, int*); 68 extern off_t hist_tell(History_t*,int); 69 extern off_t hist_seek(History_t*,int); 70 extern char *hist_word(char*, int, int); 71 #if SHOPT_ESH 72 extern Histloc_t hist_locate(History_t*,int, int, int); 73 #endif /* SHOPT_ESH */ 74 75 #endif /* HIST_VERSION */ 76