/*
* ed - standard editor
* ~~
* Authors: Brian Beattie, Kees Bot, and others
*
* Copyright 1987 Brian Beattie Rights Reserved.
* Permission to copy or distribute granted under the following conditions:
* 1). No charge may be made other than reasonable charges for reproduction.
* 2). This notice must remain intact.
* 3). No further restrictions may be added.
* 4). Except meaningless ones.
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* TurboC mods and cleanup 8/17/88 RAMontante.
* Further information (posting headers, etc.) at end of file.
* RE stuff replaced with Spencerian version, sundry other bugfix+speedups
* Ian Phillipps. Version incremented to "5".
* _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
*
* ********--->> INDENTATION ONLINE !!!! <<----------****************
* Indentation added by Ted Gaunt (aka Qixx) paradox@mcs.anl.gov
* help files added by Ted Gaunt
* '^' added by Ted Gaunt
* Note: this version compatible with v.3.0.34 (and probably all others too)
* but i've only tested it on v.3 please mail me if it works on your mud
* and if you like it!
* _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
*
* Online indentation algorithm replaced with adapted version from DGD
* editor by Dworkin, 920510
*/
#define ED_VERSION 5 /* used only in the "set" function, for i.d. */
#include <stdio.h>
#include <sys/types.h> /* need for netinet */
/* #include <netinet/in.h> Included in comm.h */
#include <ctype.h>
/* Regexp is Henry Spencer's package. WARNING: regsub is modified to return
* a pointer to the \0 after the destination string, and this program refers
* to the "private" reganch field in the struct regexp.
*/
#include "lint.h"
#include "regexp.h"
#include "interpret.h"
#include "object.h"
#include "config.h"
#include "comm.h"
#ifdef AMIGA
#include "hosts/amiga/ixfile.h"
#endif
/*
* #defines for non-printing ASCII characters
*/
#define NUL 0x00 /* ^@ */
#define EOS 0x00 /* end of string */
#define SOH 0x01 /* ^A */
#define STX 0x02 /* ^B */
#define ETX 0x03 /* ^C */
#define EOT 0x04 /* ^D */
#define ENQ 0x05 /* ^E */
#define ACK 0x06 /* ^F */
#define BEL 0x07 /* ^G */
#define BS 0x08 /* ^H */
#define HT 0x09 /* ^I */
#define LF 0x0a /* ^J */
#define NL '\n'
#define VT 0x0b /* ^K */
#define FF 0x0c /* ^L */
#define CR 0x0d /* ^M */
#define SO 0x0e /* ^N */
#define SI 0x0f /* ^O */
#define DLE 0x10 /* ^P */
#define DC1 0x11 /* ^Q */
#define DC2 0x12 /* ^R */
#define DC3 0x13 /* ^S */
#define DC4 0x14 /* ^T */
#define NAK 0x15 /* ^U */
#define SYN 0x16 /* ^V */
#define ETB 0x17 /* ^W */
#define CAN 0x18 /* ^X */
#define EM 0x19 /* ^Y */
#define SUB 0x1a /* ^Z */
#define ESC 0x1b /* ^[ */
#define FS 0x1c /* ^\ */
#define GS 0x1d /* ^] */
/*#define RS 0x1e ^^ */
#define US 0x1f /* ^_ */
#define SP 0x20 /* space */
#define DEL 0x7f /* DEL*/
#define ESCAPE '\\'
#define TAB '\t' /* added by Qixx for indentation */
#define LB '{'
#define RB '}'
#define LC '('
#define RC ')'
#define LS '['
#define RS ']'
#define PP '\"'
#define EOL '\0'
#define TRUE 1
#define FALSE 0
#define ERR -2
#undef FATAL (ERR-1)
#define CHANGED (ERR-2)
#define SET_FAIL (ERR-3)
#define SUB_FAIL (ERR-4)
#define MEM_FAIL (ERR-5)
#define BUFFER_SIZE 2048 /* stream-buffer size: == 1 hd cluster */
#define LINFREE 1 /* entry not in use */
#define LGLOB 2 /* line marked global */
#define MAXLINE 2048 /* max number of chars per line */
#define MAXPAT 256 /* max number of chars per replacement pattern */
#define MAXFNAME 256 /* max file name size */
/** Global variables **/
struct line {
int l_stat; /* empty, mark */
struct line *l_prev;
struct line *l_next;
char l_buff[1];
};
typedef struct line LINE;
extern struct object *command_giver;
#ifndef toupper
extern int toupper PROT((int));
#endif
static int doprnt PROT((int, int));
static int ins PROT((char *));
static int deflt PROT((int, int));
static void print_help PROT((int arg));
static void print_help2 PROT((void));
static void count_blanks PROT((int line));
static void _count_blanks PROT((char *str, int blanks));
#define P_DIAG (ED_BUFFER->diag)
#define P_TRUNCFLG (ED_BUFFER->truncflg)
#define P_NONASCII (ED_BUFFER->nonascii)
#define P_NULLCHAR (ED_BUFFER->nullchar)
#define P_TRUNCATED (ED_BUFFER->truncated)
#define P_FNAME (ED_BUFFER->fname)
#define P_FCHANGED (ED_BUFFER->fchanged)
#define P_NOFNAME (ED_BUFFER->nofname)
#define P_MARK (ED_BUFFER->mark)
#define P_OLDPAT (ED_BUFFER->oldpat)
#define P_LINE0 (ED_BUFFER->Line0)
#define P_LINE0 (ED_BUFFER->Line0)
#define P_CURLN (ED_BUFFER->CurLn)
#define P_CURPTR (ED_BUFFER->CurPtr)
#define P_LASTLN (ED_BUFFER->LastLn)
#define P_LINE1 (ED_BUFFER->Line1)
#define P_LINE2 (ED_BUFFER->Line2)
#define P_NLINES (ED_BUFFER->nlines)
#define P_SHIFTWIDTH (ED_BUFFER->shiftwidth)
/* shiftwidth is meant to be a 4-bit-value that can be packed into an int
along with flags, therefore masks 0x1 ... 0x8 are reserved. */
#define P_FLAGS (ED_BUFFER->flags)
#define NFLG_MASK 0x0010
#define P_NFLG ( P_FLAGS & NFLG_MASK )
#define LFLG_MASK 0x0020
#define P_LFLG ( P_FLAGS & LFLG_MASK )
#define PFLG_MASK 0x0040
#define P_PFLG ( P_FLAGS & PFLG_MASK )
#define EIGHTBIT_MASK 0x0080
#define P_EIGHTBIT ( P_FLAGS & EIGHTBIT_MASK )
#define AUTOINDFLG_MASK 0x0100
#define P_AUTOINDFLG ( P_FLAGS & AUTOINDFLG_MASK )
#define EXCOMPAT_MASK 0x0200
#define P_EXCOMPAT ( P_FLAGS & EXCOMPAT_MASK )
#define SHIFTWIDTH_MASK 0x000f
#define ALL_FLAGS_MASK 0x03f0
#define P_APPENDING (ED_BUFFER->appending)
#define P_MORE (ED_BUFFER->moring)
#define P_LEADBLANKS (ED_BUFFER->leading_blanks)
#define P_CUR_AUTOIND (ED_BUFFER->cur_autoindent)
#define ED_BUFFER (current_ed_buffer)
#define EXTERN_ED_BUFFER (command_giver->interactive->ed_buffer)
static struct ed_buffer *current_ed_buffer;
static char inlin[MAXLINE];
static char *inptr; /* tty input buffer */
struct ed_buffer {
int diag; /* diagnostic-output? flag */
int truncflg; /* truncate long line flag */
int nonascii; /* count of non-ascii chars read */
int nullchar; /* count of null chars read */
int truncated; /* count of lines truncated */
char fname[MAXFNAME];
int fchanged; /* file-changed? flag */
int nofname;
int mark['z'-'a'+1];
regexp *oldpat;
LINE Line0;
int CurLn;
LINE *CurPtr; /* CurLn and CurPtr must be kept in step */
int LastLn;
int Line1, Line2, nlines;
int flags;
#if 0
int eightbit; /* save eighth bit */
int nflg; /* print line number flag */
int lflg; /* print line in verbose mode */
int pflg; /* print current line after each command */
#endif
int appending;
int moring; /* used for the wait line of help */
char *exit_fn; /* Function to be called when player exits */
struct object *exit_ob; /* in this object */
int shiftwidth;
int leading_blanks;
int cur_autoindent;
struct svalue old_prompt;
};
static struct tbl {
char *t_str;
int t_and_mask;
int t_or_mask;
} *t, tbl[] = {
{ "number", ~FALSE, NFLG_MASK, },
{ "nonumber", ~NFLG_MASK, FALSE, },
{ "list", ~FALSE, LFLG_MASK, },
{ "nolist", ~LFLG_MASK, FALSE, },
{ "print", ~FALSE, PFLG_MASK, },
{ "noprint", ~PFLG_MASK, FALSE, },
{ "eightbit", ~FALSE, EIGHTBIT_MASK, },
{ "noeightbit", ~EIGHTBIT_MASK, FALSE, },
{ "autoindent", ~FALSE, AUTOINDFLG_MASK,},
{ "noautoindent", ~AUTOINDFLG_MASK, FALSE, },
{ "excompatible", ~FALSE, EXCOMPAT_MASK, },
{ "noexcompatible", ~EXCOMPAT_MASK, FALSE, },
{ 0 },
};
/*-------------------------------------------------------------------------*/
static LINE *getptr();
extern char *gettxt();
extern char *gettxtl();
extern char *catsub();
static void prntln(), putcntl();
static regexp *optpat();
/*________ Macros ________________________________________________________*/
#ifndef max
# define max(a,b) ((a) > (b) ? (a) : (b))
#endif
#ifndef min
# define min(a,b) ((a) < (b) ? (a) : (b))
#endif
#define nextln(l) ((l)+1 > P_LASTLN ? 0 : (l)+1)
#define prevln(l) ((l)-1 < 0 ? P_LASTLN : (l)-1)
#define gettxtl(lin) ((lin)->l_buff)
#define gettxt(num) (gettxtl( getptr(num) ))
#define getnextptr(p) ((p)->l_next)
#define getprevptr(p) ((p)->l_prev)
#define setCurLn( lin ) ( P_CURPTR = getptr( P_CURLN = (lin) ) )
#define nextCurLn() ( P_CURLN = nextln(P_CURLN), P_CURPTR = getnextptr( P_CURPTR ) )
#define prevCurLn() ( P_CURLN = prevln(P_CURLN), P_CURPTR = getprevptr( P_CURPTR ) )
#define clrbuf() del(1, P_LASTLN)
#define Skip_White_Space {while (*inptr==SP || *inptr==HT) inptr++;}
#define relink(a, x, y, b) { (x)->l_prev = (a); (y)->l_next = (b); }
/*________ functions ______________________________________________________*/
/* append.c */
static
int append(line, glob)
int line, glob;
{
if(glob)
return(ERR);
setCurLn( line );
P_APPENDING = 1;
if(P_NFLG)
add_message("%6d. ",P_CURLN+1);
if (P_CUR_AUTOIND)
add_message("%*s",P_LEADBLANKS,"");
set_prompt("*\b");
return 0;
}
static INLINE /* only used once */
int more_append(str)
char *str;
{
if(str[0] == '.' && str[1] == '\0') {
P_APPENDING = 0;
set_prompt(":");
return(0);
}
if(P_NFLG)
add_message("%6d. ",P_CURLN+2);
if ( P_CUR_AUTOIND )
{
int i;
int less_indent_flag = 0;
while ( *str=='\004' || *str == '\013' )
{
str++;
P_LEADBLANKS-=P_SHIFTWIDTH;
if ( P_LEADBLANKS < 0 ) P_LEADBLANKS=0;
less_indent_flag=1;
}
for ( i=0; i < P_LEADBLANKS; ) inlin[i++]=' ';
strncpy(inlin+P_LEADBLANKS,str,MAXLINE-P_LEADBLANKS);
inlin[MAXLINE-1]='\0';
_count_blanks(inlin,0);
add_message("%*s",P_LEADBLANKS,"");
if ( !*str && less_indent_flag ) return 0;
str=inlin;
}
if( ins(str) < 0)
return( MEM_FAIL );
return 0;
}
static void count_blanks(line)
int line;
{
_count_blanks(gettxtl(getptr(line)), 0);
}
static void _count_blanks(str,blanks)
char *str;
int blanks;
{
for ( ; *str; str++ )
{
if ( *str == ' ' ) blanks++;
else if ( *str == '\t' ) blanks += 8 - blanks % 8 ;
else break;
}
P_LEADBLANKS = blanks<MAXLINE ? blanks : MAXLINE ;
}
/* ckglob.c */
static INLINE /* only used once */
int ckglob()
{
regexp *glbpat;
char c, delim, *lin;
int num;
LINE *ptr;
c = *inptr;
if(c != 'g' && c != 'v')
return(0);
if (deflt(1, P_LASTLN) < 0)
return(ERR);
delim = *++inptr;
if(delim <= ' ')
return(ERR);
glbpat = optpat();
if(*inptr == delim)
inptr++;
ptr = getptr(1);
for (num=1; num<=P_LASTLN; num++) {
ptr->l_stat &= ~LGLOB;
if (P_LINE1 <= num && num <= P_LINE2) {
/* we might have got a NULL pointer if the
supplied pattern was invalid */
if (glbpat) {
lin = gettxtl(ptr);
if(regexec(glbpat, lin )) {
if (c=='g') ptr->l_stat |= LGLOB;
} else {
if (c=='v') ptr->l_stat |= LGLOB;
}
}
}
ptr = getnextptr(ptr);
}
return(1);
}
/* deflt.c
* Set P_LINE1 & P_LINE2 (the command-range delimiters) if the file is
* empty; Test whether they have valid values.
*/
static
int deflt(def1, def2)
int def1, def2;
{
if(P_NLINES == 0) {
P_LINE1 = def1;
P_LINE2 = def2;
}
return ( (P_LINE1>P_LINE2 || P_LINE1<=0) ? ERR : 0 );
}
/* del.c */
/* One of the calls to this function tests its return value for an error
* condition. But del doesn't return any error value, and it isn't obvious
* to me what errors might be detectable/reportable. To silence a warning
* message, I've added a constant return statement. -- RAM
* ... It could check to<=P_LASTLN ... igp
*/
static
int del(from, to)
int from, to;
{
LINE *first, *last, *next, *tmp;
if(from < 1)
from = 1;
first = getprevptr( getptr( from ) );
last = getnextptr( getptr( to ) );
next = first->l_next;
while(next != last && next != &P_LINE0) {
tmp = next->l_next;
xfree((char *)next);
next = tmp;
}
relink(first, last, first, last);
P_LASTLN -= (to - from)+1;
setCurLn( prevln(from) );
return(0);
}
static INLINE /* only used once */
int dolst(line1, line2)
int line1, line2;
{
int oldflags=P_FLAGS, p;
P_FLAGS |= LFLG_MASK;
p = doprnt(line1, line2);
P_FLAGS = oldflags;
return p;
}
#if 0
/* esc.c
* Map escape sequences into their equivalent symbols. Returns the
* correct ASCII character. If no escape prefix is present then s
* is untouched and *s is returned, otherwise **s is advanced to point
* at the escaped character and the translated character is returned.
*/
int esc(s)
char **s;
{
register int rval;
if (**s != ESCAPE) {
rval = **s;
} else {
(*s)++;
switch(islower(**s) ? toupper(**s) : **s) {
case '\000':
rval = ESCAPE; break;
case 'S':
rval = ' '; break;
case 'N':
rval = '\n'; break;
case 'T':
rval = '\t'; break;
case 'B':
rval = '\b'; break;
case 'R':
rval = '\r'; break;
default:
rval = **s; break;
}
}
return (rval);
}
#endif /* 0 for unused function esc */
/* doprnt.c */
static
int doprnt(from, to)
int from, to;
{
from = (from < 1) ? 1 : from;
to = (to > P_LASTLN) ? P_LASTLN : to;
if(to != 0) {
setCurLn( from );
while( P_CURLN <= to ) {
prntln( gettxtl( P_CURPTR ), P_LFLG, (P_NFLG ? P_CURLN : 0));
if( P_CURLN == to )
break;
nextCurLn();
}
}
return(0);
}
static
void prntln(str, vflg, lin)
char *str;
int vflg, lin;
{
if(lin)
add_message("%7d ",lin);
while(*str && *str != NL) {
if(*str < ' ' || *str >= 0x7f) {
switch(*str) {
case '\t':
if(vflg)
putcntl(*str);
else
add_message("%c", *str);
break;
case DEL:
add_message("^?");
break;
default:
putcntl(*str);
break;
}
} else
add_message("%c", *str);
str++;
}
if(vflg)
add_message("$");
add_message("\n");
}
static
void putcntl(c)
char c;
{
add_message("^%c",(c&31)|'@');
}
/* egets.c */
static INLINE /* only used once */
int egets(str,size,stream)
char *str;
int size;
FILE *stream;
{
int c, count;
char *cp;
/* assert(size); if there is any chance of size == 0 */
count = 0;
cp = str;
do {
c = getc(stream);
if(c == EOF) {
*cp = EOS;
if(count)
add_message("[Incomplete last line]\n");
return(count);
}
else if(c == NL) {
*cp = EOS;
return(++count);
}
else if (c == 0)
P_NULLCHAR++; /* count nulls */
else {
if(c > 127) {
if(!P_EIGHTBIT) /* if not saving eighth bit */
c = c&127; /* strip eigth bit */
P_NONASCII++; /* count it */
}
*cp++ = c; /* not null, keep it */
count++;
}
} while (size > count);
str[count-1] = EOS;
if(c != NL) {
add_message("truncating line\n");
P_TRUNCATED++;
while((c = getc(stream)) != EOF)
if(c == NL)
break;
}
return(count);
} /* egets */
static int doread(lin, fname)
int lin;
char *fname;
{
FILE *fp;
int err;
unsigned long bytes;
unsigned int lines;
char str[MAXLINE];
err = 0;
P_NONASCII = P_NULLCHAR = P_TRUNCATED = 0;
if (P_DIAG) add_message("\"%s\" ",fname);
if( (fp = fopen(fname, "r")) == NULL ) {
add_message(" isn't readable.\n");
return( ERR );
}
setCurLn( lin );
for(lines = 0, bytes = 0;(err = egets(str,MAXLINE,fp)) > 0;) {
bytes += err;
if(ins(str) < 0) {
err = MEM_FAIL;
break;
}
lines++;
}
fclose(fp);
if(err < 0)
return(err);
if (P_DIAG) {
add_message("%u lines %u bytes",lines,bytes);
if(P_NONASCII)
add_message(" [%d non-ascii]",P_NONASCII);
if(P_NULLCHAR)
add_message(" [%d nul]",P_NULLCHAR);
if(P_TRUNCATED)
add_message(" [%d lines truncated]",P_TRUNCATED);
add_message("\n");
}
return( err );
} /* doread */
static int dowrite(from, to, fname, apflg)
int from, to;
char *fname;
int apflg;
{
FILE *fp;
int lin, err;
unsigned int lines;
unsigned long bytes;
char *str;
LINE *lptr;
err = 0;
lines = bytes = 0;
add_message("\"%s\" ",fname);
if((fp = fopen(fname,(apflg?"a":"w"))) == NULL) {
add_message(" can't be opened for writing!\n");
return( ERR );
}
lptr = getptr(from);
for(lin = from; lin <= to; lin++) {
str = lptr->l_buff;
lines++;
bytes += strlen(str) + 1; /* str + '\n' */
if(fputs(str, fp) == EOF) {
add_message("file write error\n");
err++;
break;
}
fputc('\n', fp);
lptr = lptr->l_next;
}
add_message("%u lines %lu bytes\n",lines,bytes);
fclose(fp);
return( err );
} /* dowrite */
/* find.c */
static INLINE /* only used once */
int find(pat, dir)
regexp *pat;
int dir;
{
int i, num;
LINE *lin;
dir ? nextCurLn() : prevCurLn() ;
num = P_CURLN;
lin = P_CURPTR;
/* if the typed in pattern was invalid we have a NULL pointer! */
if (!pat) return ( ERR );
for(i=0; i<P_LASTLN; i++ ) {
if(regexec( pat, gettxtl( lin ) ))
return(num);
if( dir )
num = nextln(num), lin = getnextptr(lin);
else
num = prevln(num), lin = getprevptr(lin);
}
return ( ERR );
}
#if 0
/* findg.c by Ted Gaunt for global searches.... much like 'grep'
especially useful when line numbering is turned on.
*/
int findg(pat, dir)
regexp *pat;
int dir;
{
int i, num,count;
LINE *lin;
count=0;
num = P_CURLN;
lin = P_CURPTR;
for(i=0; i<P_LASTLN; i++ ) {
if(regexec( pat, gettxtl( lin ) ))
{prntln( gettxtl( lin ), P_LFLG, (P_NFLG ? P_CURLN : 0));
count++;}
if( dir )
num = nextln(num), lin = getnextptr(lin);
else
num = prevln(num), lin = getprevptr(lin);
nextCurLn();
}
if (!count)
return ( ERR );
else return (count);
}
#endif /* 0 */
/* getfn.c */
static
char *getfn(writeflg)
int writeflg;
{
extern int out_of_memory;
static char file[MAXFNAME];
char *cp;
char *file2;
struct svalue *ret;
if(*inptr == NL) {
P_NOFNAME=TRUE;
file[0] = '/';
strcpy(file+1, P_FNAME);
} else {
P_NOFNAME=FALSE;
Skip_White_Space;
cp = file;
while(*inptr && *inptr != NL && *inptr != SP && *inptr != HT)
*cp++ = *inptr++;
*cp = '\0';
}
if(strlen(file) == 0) {
add_message("bad file name\n");
return( NULL );
}
if (file[0] != '/') {
push_string_malloced(file);
ret = apply_master_ob("make_path_absolute", 1);
if (!ret || (ret->type == T_NUMBER && ret->u.number == 0)) {
if (out_of_memory)
error("Out of memory\n");
return NULL;
}
if (ret->type == T_STRING)
strncpy(file, ret->u.string, sizeof file - 1);
}
/* add_message() / apply() might have nasty effects */
if (!command_giver || command_giver->flags & O_DESTRUCTED)
return NULL;
file2 = check_valid_path(file, command_giver, "ed_start", writeflg);
if (!file2)
return( NULL );
strncpy(file, file2, MAXFNAME-1);
file[MAXFNAME-1] = 0;
if(strlen(file) == 0) {
add_message("no file name\n");
return(NULL);
}
return( file );
} /* getfn */
static
int getnum(first)
int first;
{
regexp *srchpat;
int num;
char c;
Skip_White_Space;
if(*inptr >= '0' && *inptr <= '9') { /* line number */
for(num = 0; *inptr >= '0' && *inptr <= '9'; ++inptr) {
num = (num * 10) + (*inptr - '0');
}
return num;
}
switch(c = *inptr) {
case '.':
inptr++;
return (P_CURLN);
case '$':
inptr++;
return (P_LASTLN);
case '/':
case '?':
srchpat = optpat();
if(*inptr == c)
inptr++;
return(find(srchpat,c == '/'?1:0));
#if 0
case '^': /* for grep-like searching */
case '&':
srchpat = optpat();
if(*inptr == c)
inptr++;
return(findg(srchpat,c == '^'?1:0));
#endif
case '-':
case '+':
return(first ? P_CURLN : 1);
case '\'':
inptr++;
if (*inptr < 'a' || *inptr > 'z')
return(EOF);
return P_MARK[ *inptr++ - 'a' ];
default:
return ( first ? EOF : 1 ); /* unknown address */
}
} /* getnum */
/* getone.c
* Parse a number (or arithmetic expression) off the command line.
*/
#define FIRST 1
#define NOTFIRST 0
static int getone()
{
int c, i, num;
if((num = getnum(FIRST)) >= 0) {
for (;;) {
Skip_White_Space;
if(*inptr != '+' && *inptr != '-')
break; /* exit infinite loop */
c = *inptr++;
if((i = getnum(NOTFIRST)) < 0)
return ( i );
if(c == '+')
num += i;
else
num -= i;
}
}
return ( num>P_LASTLN ? ERR : num );
} /* getone */
static int getlst()
{
int num;
P_LINE2 = 0;
for(P_NLINES = 0; (num = getone()) >= 0;)
{
P_LINE1 = P_LINE2;
P_LINE2 = num;
P_NLINES++;
if(*inptr != ',' && *inptr != ';')
break;
if(*inptr == ';')
setCurLn( num );
inptr++;
}
P_NLINES = min(P_NLINES, 2);
if(P_NLINES == 0)
P_LINE2 = P_CURLN;
if(P_NLINES <= 1)
P_LINE1 = P_LINE2;
return ( (num == ERR) ? num : P_NLINES );
} /* getlst */
/* getptr.c */
static
LINE *getptr(num)
int num;
{
LINE *ptr;
int j;
if (2*num>P_LASTLN && num<=P_LASTLN) { /* high line numbers */
ptr = P_LINE0.l_prev;
for (j = P_LASTLN; j>num; j--)
ptr = ptr->l_prev;
} else { /* low line numbers */
ptr = &P_LINE0;
for(j = 0; j < num; j++)
ptr = ptr->l_next;
}
return(ptr);
}
/* getrhs.c */
static INLINE /* only used once */
int getrhs(sub)
char *sub;
{
char delim = *inptr++;
char *outmax = sub + MAXPAT;
if( delim == NL || *inptr == NL) /* check for eol */
return( ERR );
while( *inptr != delim && *inptr != NL ) {
if ( sub > outmax )
return ERR;
if ( *inptr == ESCAPE ) {
switch ( *++inptr ) {
case 'r':
*sub++ = '\r';
inptr++;
break;
#if 0
case ESCAPE:
*sub++ = ESCAPE;
*sub++ = ESCAPE;
inptr++;
#endif
case 'n':
*sub++ = '\n';
inptr++;
break;
case 'b':
*sub++ = '\b';
inptr++;
break;
case 't':
*sub++ = '\t';
inptr++;
break;
case '0': {
int i=3;
*sub = 0;
do {
if (*++inptr<'0' || *inptr >'7')
break;
*sub = (*sub<<3) | (*inptr-'0');
} while (--i!=0);
sub++;
} break;
#if 0
default:
if ( *inptr != delim )
*sub++ = ESCAPE;
#else
case '&':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '\\':
*sub++ = ESCAPE; /* fall through */
default:
#endif
*sub++ = *inptr;
if ( *inptr != NL )
inptr++;
}
}
else *sub++ = *inptr++;
}
*sub = '\0';
inptr++; /* skip over delimter */
Skip_White_Space;
if(*inptr == 'g') {
inptr++;
return( 1 );
}
return( 0 );
}
/* ins.c */
static
int ins(str)
char *str;
{
char *cp;
LINE *new, *nxt;
int len;
do {
for ( cp = str; *cp && *cp != NL; cp++ )
;
len = cp - str;
/* cp now points to end of first or only line */
if((new = (LINE *)xalloc(sizeof(LINE)+len)) == NULL)
return( MEM_FAIL ); /* no memory */
new->l_stat=0;
strncpy(new->l_buff,str,len); /* build new line */
new->l_buff[len] = EOS;
nxt = getnextptr(P_CURPTR); /* get next line */
relink(P_CURPTR, new, new, nxt); /* add to linked list */
relink(new, nxt, P_CURPTR, new);
P_LASTLN++;
P_CURLN++;
P_CURPTR = new;
str = cp + 1;
}
while( *cp != EOS );
return 1;
}
/* join.c */
static INLINE /* only used once */
int join(first, last)
int first, last;
{
char buf[MAXLINE];
char *cp=buf, *str;
LINE *lin;
int num;
if (first<=0 || first>last || last>P_LASTLN)
return(ERR);
if (first==last) {
setCurLn( first );
return 0;
}
lin = getptr(first);
for (num=first; num<=last; num++) {
str=gettxtl(lin);
while ( *str ) {
if (cp >= buf + MAXLINE-1 ) {
add_message("line too long\n");
return(ERR);
}
*cp++ = *str++;
}
lin = getnextptr(lin);
}
*cp = EOS;
del(first, last);
if( ins(buf) < 0 )
return MEM_FAIL;
P_FCHANGED = TRUE;
return 0;
}
/* move.c
* Unlink the block of lines from P_LINE1 to P_LINE2, and relink them
* after line "num".
*/
static INLINE /* only used once */
int move(num)
int num;
{
int range;
LINE *before, *first, *last, *after;
if( P_LINE1 <= num && num <= P_LINE2 )
return( ERR );
range = P_LINE2 - P_LINE1 + 1;
before = getptr(prevln(P_LINE1));
first = getptr(P_LINE1);
last = getptr(P_LINE2);
after = getptr(nextln(P_LINE2));
relink(before, after, before, after);
P_LASTLN -= range; /* per AST's posted patch 2/2/88 */
if (num > P_LINE1)
num -= range;
before = getptr(num);
after = getptr(nextln(num));
relink(before, first, last, after);
relink(last, after, before, first);
P_LASTLN += range; /* per AST's posted patch 2/2/88 */
setCurLn( num + range );
return( 1 );
}
static INLINE /* only used once */
int transfer(num)
int num;
{
int mid, lin, ntrans;
if (P_LINE1<=0 || P_LINE1>P_LINE2)
return(ERR);
mid= num<P_LINE2 ? num : P_LINE2;
setCurLn( num );
ntrans=0;
for (lin=P_LINE1; lin<=mid; lin++) {
if( ins(gettxt(lin)) < 0 )
return MEM_FAIL;
ntrans++;
}
lin+=ntrans;
P_LINE2+=ntrans;
for ( ; lin <= P_LINE2; lin += 2 ) {
if( ins(gettxt(lin)) < 0 )
return MEM_FAIL;
P_LINE2++;
}
return(1);
}
/* optpat.c */
static
regexp *optpat()
{
char delim, str[MAXPAT], *cp;
delim = *inptr++;
if (delim == NL)
return P_OLDPAT;
cp = str;
while(*inptr != delim && *inptr != NL && *inptr != EOS && cp < str + MAXPAT - 1) {
if(*inptr == ESCAPE && inptr[1] != NL)
*cp++ = *inptr++;
*cp++ = *inptr++;
}
*cp = EOS;
if(*str == EOS)
return(P_OLDPAT);
if(P_OLDPAT)
xfree((char *)P_OLDPAT);
return P_OLDPAT = regcomp(str,P_EXCOMPAT);
}
/* regerror.c */
void regerror( s )
char *s;
{
add_message("ed: %s\n", s );
}
static INLINE /* only used once */
int set()
{
/* the longest valid set keyword is 14 characters long. Add one char
* for EOS, and another to get 4-byte-alignmnt
*/
char word[16];
int i;
if(*(++inptr) != 't') {
if(*inptr != SP && *inptr != HT && *inptr != NL)
return(ERR);
} else
inptr++;
if ( (*inptr == NL))
{
add_message("ed version %d.%d\n", ED_VERSION/100, ED_VERSION%100);
for(t = tbl; t->t_str; t+=2) {
add_message( "%s:%s ",t->t_str,
P_FLAGS & t->t_or_mask ?"ON":"OFF");
}
add_message("\nshiftwidth:%d\n",P_SHIFTWIDTH);
return(0);
}
Skip_White_Space;
for(i = 0; *inptr != SP && *inptr != HT && *inptr != NL;) {
/* leave space for EOS too */
if (i == sizeof word - 2) {
add_message("Too long argument to 'set'!\n");
return 0;
}
word[i++] = *inptr++;
}
word[i] = EOS;
for(t = tbl; t->t_str; t++) {
if(strcmp(word,t->t_str) == 0) {
P_FLAGS = P_FLAGS & t->t_and_mask | t->t_or_mask;
return(0);
}
}
if ( !strcmp(word,"save") ) {
struct svalue *ret;
push_object(command_giver);
push_number( P_SHIFTWIDTH | P_FLAGS );
ret = apply_master_ob("save_ed_setup",2);
if ( ret && ret->type==T_NUMBER && ret->u.number > 0 )
return 0;
}
if ( !strcmp(word,"shiftwidth") ) {
Skip_White_Space;
if ( isdigit(*inptr) ) {
P_SHIFTWIDTH = *inptr-'0';
return 0;
}
}
return SET_FAIL;
}
#ifndef relink
void relink(a, x, y, b)
LINE *a, *x, *y, *b;
{
x->l_prev = a;
y->l_next = b;
}
#endif
static INLINE /* only used once */
void set_ed_buf()
{
relink(&P_LINE0, &P_LINE0, &P_LINE0, &P_LINE0);
P_CURLN = P_LASTLN = 0;
P_CURPTR = &P_LINE0;
}
/* subst.c */
static INLINE /* only used once */
int subst(pat, sub, gflg, pflag)
regexp *pat;
char *sub;
int gflg, pflag;
{
int nchngd = 0;
char *txtptr;
char *new, *old, buf[MAXLINE];
int space; /* amylaar */
int still_running = 1;
LINE *lastline = getptr( P_LINE2 );
if(P_LINE1 <= 0)
return( SUB_FAIL );
nchngd = 0; /* reset count of lines changed */
for( setCurLn( prevln( P_LINE1 ) ); still_running; ) {
nextCurLn();
new = buf;
space = MAXLINE; /* amylaar */
if ( P_CURPTR == lastline )
still_running = 0;
if ( regexec( pat, txtptr = gettxtl( P_CURPTR ) ) ) {
do
{
/* Copy leading text */
int diff = pat->startp[0] - txtptr;
if ( (space-=diff) < 0 ) /* amylaar */
return SUB_FAIL;
strncpy( new, txtptr, diff );
new += diff;
/* Do substitution */
old = new;
new = regsub( pat, sub, new, space);
if (!new || (space-= new-old) < 0) /* amylaar */
return SUB_FAIL;
if (txtptr == pat->endp[0]) { /* amylaar :
prevent infinite loop */
if ( !*txtptr ) break;
if (--space < 0) return SUB_FAIL;
*new++ = *txtptr++;
} else
txtptr = pat->endp[0];
}
while( gflg && !pat->reganch && regexec( pat, txtptr ));
/* Copy trailing chars */
/* amylaar : always check for enough space left
* BEFORE altering memory
*/
if ( (space-= strlen(txtptr)+1 ) < 0 )
return SUB_FAIL;
strcpy(new, txtptr);
del(P_CURLN,P_CURLN);
if( ins(buf) < 0 )
return MEM_FAIL;
nchngd++;
if(pflag)
doprnt(P_CURLN, P_CURLN);
}
}
return (( nchngd == 0 && !gflg ) ? SUB_FAIL : nchngd);
}
/*
* Indent code from DGD editor (v0.1), adapted. No attempt has been made to
* optimize for this editor. Dworkin 920510
*/
/* closure / symbol support Amylaar 30th Sep 1993 */
# define error(s) { add_message(s, lineno); errs++; return; }
# define bool char
static int lineno, errs;
static int shi; /* the current shift (negative for left shift) */
/*
* NAME: shift(char*)
* ACTION: Shift a line left or right according to "shi".
*/
/* amylaar: don't use identifier index, this is reserved in SYS V compatible
* environments.
*/
static void shift(text)
register char *text;
{
register int indent_index;
/* first determine the number of leading spaces */
indent_index = 0;
while (*text == ' ' || *text == '\t') {
if (*text++ == ' ') {
indent_index++;
} else {
indent_index = (indent_index + 8) & ~7;
}
}
if (*text != '\0') { /* don't shift lines with ws only */
indent_index += shi;
if (indent_index < MAXLINE) {
char buffer[MAXLINE];
register char *p;
p = buffer;
/* fill with leading ws */
while (indent_index >= 8) {
*p++ = '\t';
indent_index -= 8;
}
while (indent_index > 0) {
*p++ = ' ';
--indent_index;
}
if (p - buffer + strlen(text) < MAXLINE) {
strcpy(p, text);
del(lineno, lineno);
ins(buffer);
return;
}
}
error("Result of shift would be too long, line %d\n");
}
}
# define STACKSZ 1024 /* size of indent stack */
/* token definitions in indent */
# define SEMICOLON 0
# define LBRACKET 1
# define RBRACKET 2
# define LOPERATOR 3
# define ROPERATOR 4
# define LHOOK 5
# define RHOOK 6
# define TOKEN 7
# define ELSE 8
# define IF 9
# define FOR 10
# define WHILE 11
# define DO 12
# define XEOT 13
static char *stack, *stackbot; /* token stack */
static int *ind, *indbot; /* indent stack */
static char quote; /* ' or " */
static bool in_ppcontrol, in_comment, after_keyword; /* status */
/*
* NAME: indent(char*)
* ACTION: Parse and indent a line of text. This isn't perfect, as
* keywords could be defined as macros, comments are very hard to
* handle properly, (, [ and ({ will match any of ), ] and }),
* and last but not least everyone has his own taste of
* indentation.
*/
static void indent(buf)
char *buf;
{
static char f[] = { 7, 1, 7, 1, 2, 1, 6, 4, 2, 6, 7, 7, 2, 0, };
static char g[] = { 2, 2, 1, 7, 1, 5, 1, 3, 6, 2, 2, 2, 2, 0, };
char text[MAXLINE], ident[MAXLINE];
register char *p, *sp;
register int *ip;
register long indent_index;
register int top, token;
char *start;
bool do_indent;
/*
* Problem: in this editor memory for deleted lines is reclaimed. So
* we cannot shift the line and then continue processing it, as in
* DGD ed. Instead make a copy of the line, and process the copy.
* Dworkin 920510
*/
strcpy(text, buf);
do_indent = FALSE;
indent_index = 0;
p = text;
/* process status vars */
if (quote != '\0') {
shi = 0; /* in case a comment starts on this line */
} else if (in_ppcontrol || *p == '#' && p[1] != '\'') {
while (*p != '\0') {
if (*p == '\\' && *++p == '\0') {
in_ppcontrol = TRUE;
return;
}
p++;
}
in_ppcontrol = FALSE;
return;
} else {
/* count leading ws */
while (*p == ' ' || *p == '\t') {
if (*p++ == ' ') {
indent_index++;
} else {
indent_index = (indent_index + 8) & ~7;
}
}
if (*p == '\0') {
del(lineno, lineno);
ins(p);
return;
} else if (in_comment) {
shift(text); /* use previous shi */
} else {
do_indent = TRUE;
}
}
/* process this line */
start = p;
while (*p != '\0') {
/* lexical scanning: find the next token */
ident[0] = '\0';
if (in_comment) {
/* comment */
while (*p != '*') {
if (*p == '\0') {
return;
}
p++;
}
while (*p == '*') {
p++;
}
if (*p == '/') {
in_comment = FALSE;
p++;
}
continue;
} else if (quote != '\0') {
/* string or character constant */
for (;;) {
if (*p == quote) {
quote = '\0';
p++;
break;
} else if (*p == '\0') {
error("Unterminated string in line %d\n");
} else if (*p == '\\' && *++p == '\0') {
break;
}
p++;
}
token = TOKEN;
} else {
switch (*p++) {
case ' ': /* white space */
case '\t':
continue;
case '\'':
if (isalunum(*p) && p[1] && p[1] != '\'') {
do ++p; while (isalunum(*p));
token = TOKEN;
break;
}
if (*p == '(' && p[1] == '{') {
/* treat quoted array like an aray */
token = TOKEN;
break;
}
/* fall through */
case '"': /* start of string */
quote = p[-1];
continue;
case '/':
if (*p == '*') { /* start of comment */
in_comment = TRUE;
if (do_indent) {
/* this line hasn't been indented yet */
shi = *ind - indent_index;
shift(text);
do_indent = FALSE;
} else {
register char *q;
register int index2;
/*
* find how much the comment has shifted, so the same
* shift can be used if the coment continues on the
* next line
*/
index2 = *ind;
for (q = start; q < p - 1;) {
if (*q++ == '\t') {
indent_index = (indent_index + 8) & ~7;
index2 = (index2 + 8) & ~7;
} else {
indent_index++;
index2++;
}
}
shi = index2 - indent_index;
}
p++;
continue;
}
token = TOKEN;
break;
case '{':
token = LBRACKET;
break;
case '(':
if (after_keyword) {
/*
* LOPERATOR & ROPERATOR are a kludge. The operator
* precedence parser that is used could not work if
* parenthesis after keywords was not treated specially.
*/
token = LOPERATOR;
break;
}
if (*p == '{' || *p == '[') {
p++; /* ({ , ([ each are one token */
}
case '[':
token = LHOOK;
break;
case '}':
if (*p != ')') {
token = RBRACKET;
break;
}
/* }) is one token; fall through */
case ']':
if (*p == ')') {
p++;
}
case ')':
token = RHOOK;
break;
case ';':
token = SEMICOLON;
break;
case '#':
if (*p == '\'') {
++p;
if (isalunum(*p)) {
do ++p; while (isalunum(*p));
} else {
extern int symbol_operator PROT((char *, char **));
char *end;
if (symbol_operator(p, &end) < 0) {
error("Missing function name after #' in line %d\n");
}
p = end;
}
token = TOKEN;
break;
}
default:
if (isalpha(*--p) || *p == '_') {
register char *q;
/* Identifier. See if it's a keyword. */
q = ident;
do {
*q++ = *p++;
} while (isalnum(*p) || *p == '_');
*q = '\0';
if (strcmp(ident, "if" ) == 0) token = IF;
else if (strcmp(ident, "else" ) == 0) token = ELSE;
else if (strcmp(ident, "for" ) == 0) token = FOR;
else if (strcmp(ident, "while") == 0) token = WHILE;
else if (strcmp(ident, "do" ) == 0) token = DO;
else /* not a keyword */ token = TOKEN;
} else {
/* anything else is a "token" */
p++;
token = TOKEN;
}
break;
}
}
/* parse */
sp = stack;
ip = ind;
for (;;) {
top = *sp;
if (top == LOPERATOR && token == RHOOK) {
/* ) after LOPERATOR is ROPERATOR */
token = ROPERATOR;
}
if (f[top] <= g[token]) { /* shift the token on the stack */
register int i;
if (sp == stackbot) {
/* out of stack */
error("Nesting too deep in line %d\n");
}
/* handle indentation */
i = *ip;
/* if needed, reduce indentation prior to shift */
if ((token == LBRACKET &&
(*sp == ROPERATOR || *sp == ELSE || *sp == DO)) ||
token == RBRACKET ||
(token == IF && *sp == ELSE)) {
/* back up */
i -= P_SHIFTWIDTH;
} else if (token == RHOOK || token == ROPERATOR) {
i -= P_SHIFTWIDTH / 2;
}
/* shift the current line, if appropriate */
if (do_indent) {
shi = i - indent_index;
if (token == TOKEN && *sp == LBRACKET &&
(strcmp(ident, "case") == 0 ||
strcmp(ident, "default") == 0)) {
/* back up if this is a switch label */
shi -= P_SHIFTWIDTH;
}
shift(text);
do_indent = FALSE;
}
/* change indentation after current token */
switch (token) {
case LBRACKET: case ROPERATOR: case ELSE: case DO:
{
/* add indentation */
i += P_SHIFTWIDTH;
break;
}
case LOPERATOR: case LHOOK:
{
/* half indent after ( [ ({ ([ */
i += P_SHIFTWIDTH / 2;
break;
}
case SEMICOLON:
{
/* in case it is followed by a comment */
if (*sp == ROPERATOR || *sp == ELSE) {
i -= P_SHIFTWIDTH;
}
break;
}
}
*--sp = token;
*--ip = i;
break;
}
/* reduce handle */
do {
top = *sp++;
ip++;
} while (f[(int)*sp] >= g[top]);
}
stack = sp;
ind = ip;
after_keyword = (token >= IF); /* but not after ELSE */
}
}
static int indent_code()
{
char s[STACKSZ];
int i[STACKSZ];
int last;
/* setup stacks */
stackbot = s;
indbot = i;
stack = stackbot + STACKSZ - 1;
*stack = XEOT;
ind = indbot + STACKSZ - 1;
*ind = 0;
quote = '\0';
in_ppcontrol = FALSE;
in_comment = FALSE;
P_FCHANGED = TRUE;
last = P_LASTLN;
errs = 0;
for (lineno = 1; lineno <= last; lineno++) {
setCurLn(lineno);
indent(gettxtl(P_CURPTR));
if (errs != 0) {
return ERR;
}
}
return 0;
}
# undef bool
# undef error
/* end of indent code */
/* docmd.c
* Perform the command specified in the input buffer, as pointed to
* by inptr. Actually, this finds the command letter first.
*/
static
int docmd(glob)
int glob;
{
static char rhs[MAXPAT];
regexp *subpat;
int c, err, line3;
int apflg, pflag, gflag;
int nchng;
char *fptr;
pflag = FALSE;
Skip_White_Space;
c = *inptr++;
switch(c) {
case NL:
if( P_NLINES == 0 && (P_LINE2 = nextln(P_CURLN)) == 0 )
return(ERR);
setCurLn( P_LINE2 );
return (1);
case '=':
add_message("%d\n",P_LINE2);
break;
case 'a':
case 'A':
P_CUR_AUTOIND = c=='a' ? P_AUTOINDFLG : !P_AUTOINDFLG;
if(*inptr != NL || P_NLINES > 1)
return(ERR);
if ( P_CUR_AUTOIND ) count_blanks(P_LINE1);
if(append(P_LINE1, glob) < 0)
return(ERR);
P_FCHANGED = TRUE;
break;
case 'c':
if(*inptr != NL)
return(ERR);
if(deflt(P_CURLN, P_CURLN) < 0)
return(ERR);
P_CUR_AUTOIND = P_AUTOINDFLG;
if ( P_AUTOINDFLG ) count_blanks(P_LINE1);
if(del(P_LINE1, P_LINE2) < 0)
return(ERR);
if(append(P_CURLN, glob) < 0)
return(ERR);
P_FCHANGED = TRUE;
break;
case 'd':
if(*inptr != NL)
return(ERR);
if(deflt(P_CURLN, P_CURLN) < 0)
return(ERR);
if(del(P_LINE1, P_LINE2) < 0)
return(ERR);
if(nextln(P_CURLN) != 0)
nextCurLn();
P_FCHANGED = TRUE;
break;
case 'e':
if(P_NLINES > 0)
return(ERR);
if(P_FCHANGED)
return CHANGED;
/*FALL THROUGH*/
case 'E':
if(P_NLINES > 0)
return(ERR);
if(*inptr != ' ' && *inptr != HT && *inptr != NL)
return(ERR);
if((fptr = getfn(0)) == NULL)
return(ERR);
clrbuf();
(void)doread(0, fptr);
strcpy(P_FNAME, fptr);
P_FCHANGED = FALSE;
break;
case 'f':
if(P_NLINES > 0)
return(ERR);
if(*inptr != ' ' && *inptr != HT && *inptr != NL)
return(ERR);
fptr = getfn(0);
if (P_NOFNAME)
add_message("%s\n", P_FNAME);
else {
if(fptr == NULL) return(ERR);
strcpy(P_FNAME, fptr);
}
break;
case 'i':
if(*inptr != NL || P_NLINES > 1)
return(ERR);
P_CUR_AUTOIND = P_AUTOINDFLG;
if ( P_AUTOINDFLG ) count_blanks(P_LINE1);
if(append(prevln(P_LINE1), glob) < 0)
return(ERR);
P_FCHANGED = TRUE;
break;
case 'j':
if (*inptr != NL || deflt(P_CURLN, P_CURLN+1)<0)
return(ERR);
if (join(P_LINE1, P_LINE2) < 0)
return(ERR);
break;
case 'k':
Skip_White_Space;
if (*inptr < 'a' || *inptr > 'z')
return ERR;
c= *inptr++;
if(*inptr != ' ' && *inptr != HT && *inptr != NL)
return(ERR);
P_MARK[c-'a'] = P_LINE1;
break;
case 'l':
if(*inptr != NL)
return(ERR);
if(deflt(P_CURLN,P_CURLN) < 0)
return(ERR);
if (dolst(P_LINE1,P_LINE2) < 0)
return(ERR);
break;
case 'm':
if((line3 = getone()) < 0)
return(ERR);
if(deflt(P_CURLN,P_CURLN) < 0)
return(ERR);
if(move(line3) < 0)
return(ERR);
P_FCHANGED = TRUE;
break;
case 'n':
if (P_NFLG)
P_FLAGS &= ~( NFLG_MASK | LFLG_MASK );
else
P_FLAGS |= ( NFLG_MASK | LFLG_MASK );
P_DIAG=!P_DIAG;
add_message( "number %s, list %s\n",
P_NFLG?"ON":"OFF",
P_LFLG?"ON":"OFF");
break;
case 'I':
if(P_NLINES > 0)
return(ERR);
if(*inptr != NL)
return(ERR);
add_message("Indenting entire code...\n");
if (indent_code())
add_message("Indention halted.\n");
else
add_message("Done indenting.\n");
break;
case 'H':
case 'h':
print_help(*(inptr++));
break;
case 'P':
case 'p':
if(*inptr != NL)
return(ERR);
if(deflt(P_CURLN,P_CURLN) < 0)
return(ERR);
if(doprnt(P_LINE1,P_LINE2) < 0)
return(ERR);
break;
case 'q':
if(P_FCHANGED)
return CHANGED;
/*FALL THROUGH*/
case 'Q':
clrbuf();
if(*inptr == NL && P_NLINES == 0 && !glob)
return(EOF);
else
return(ERR);
case 'r':
if(P_NLINES > 1)
return(ERR);
if(P_NLINES == 0) /* The original code tested */
P_LINE2 = P_LASTLN; /* if(P_NLINES = 0) */
/* which looks wrong. RAM */
if(*inptr != ' ' && *inptr != HT && *inptr != NL)
return(ERR);
if((fptr = getfn(0)) == NULL)
return(ERR);
if((err = doread(P_LINE2, fptr)) < 0)
return(err);
P_FCHANGED = TRUE;
break;
case 's':
if(*inptr == 'e')
return(set());
Skip_White_Space;
if((subpat = optpat()) == NULL)
return(ERR);
if((gflag = getrhs(rhs)) < 0)
return(ERR);
if(*inptr == 'p')
pflag++;
if(deflt(P_CURLN, P_CURLN) < 0)
return(ERR);
if((nchng = subst(subpat, rhs, gflag, pflag)) < 0)
return(ERR);
if(nchng)
P_FCHANGED = TRUE;
if ( nchng==1 && P_PFLG ) {
if(doprnt(P_CURLN, P_CURLN) < 0)
return(ERR);
}
break;
case 't':
if((line3 = getone()) < 0)
return(ERR);
if(deflt(P_CURLN,P_CURLN) < 0)
return(ERR);
if(transfer(line3) < 0)
return(ERR);
P_FCHANGED = TRUE;
break;
case 'W':
case 'w':
apflg = (c=='W');
if(*inptr != ' ' && *inptr != HT && *inptr != NL)
return(ERR);
if((fptr = getfn(1)) == NULL)
return(ERR);
if(deflt(1, P_LASTLN) < 0)
return(ERR);
if(dowrite(P_LINE1, P_LINE2, fptr, apflg) < 0)
return(ERR);
P_FCHANGED = FALSE;
break;
case 'x':
if(*inptr == NL && P_NLINES == 0 && !glob) {
if((fptr = getfn(1)) == NULL)
return(ERR);
if(dowrite(1, P_LASTLN, fptr, 0) >= 0 &&
command_giver && command_giver->interactive)
return(EOF);
}
return(ERR);
case 'z':
if(deflt(P_CURLN,P_CURLN) < 0)
return(ERR);
switch(*inptr) {
case '-':
if(doprnt(P_LINE1-21,P_LINE1) < 0)
return(ERR);
break;
case '.':
if(doprnt(P_LINE1-11,P_LINE1+10) < 0)
return(ERR);
break;
case '+':
case '\n':
if(doprnt(P_LINE1,P_LINE1+21) < 0)
return(ERR);
break;
}
break;
case 'Z':
if(deflt(P_CURLN,P_CURLN) < 0)
return(ERR);
switch(*inptr) {
case '-':
if(doprnt(P_LINE1-41,P_LINE1) < 0)
return(ERR);
break;
case '.':
if(doprnt(P_LINE1-21,P_LINE1+20) < 0)
return(ERR);
break;
case '+':
case '\n':
if(doprnt(P_LINE1,P_LINE1+41) < 0)
return(ERR);
break;
}
break;
default:
return(ERR);
}
return (0);
} /* docmd */
/* doglob.c */
static INLINE /* only used once */
int doglob()
{
int lin, status;
char *cmd;
LINE *ptr;
cmd = inptr;
for (;;) {
ptr = getptr(1);
for (lin=1; lin<=P_LASTLN; lin++) {
if (ptr->l_stat & LGLOB)
break;
ptr = getnextptr(ptr);
}
if (lin > P_LASTLN)
break;
ptr->l_stat &= ~LGLOB;
P_CURLN = lin; P_CURPTR = ptr;
inptr = cmd;
if((status = getlst()) < 0)
return(status);
if((status = docmd(1)) < 0)
return(status);
}
return(P_CURLN);
} /* doglob */
/*
* Start the editor. Because several players can edit simultaneously,
* they will each need a separate editor data block.
*
* If an exit_fn and exit_ob is given, then call exit_ob->exit_fn at
* exit of editor. The purpose is to make it possible for external LPC
* code to maintain a list of locked files.
*/
void ed_start(file_arg, exit_fn, exit_ob)
char *file_arg;
char *exit_fn;
struct object *exit_ob;
{
extern void push_apply_value(), pop_apply_value();
char *new_path;
struct svalue *setup, *prompt;
struct ed_buffer *old_ed_buffer;
if (!command_giver || !command_giver->interactive)
error("Tried to start an ed session on a non-interative player.\n");
if (EXTERN_ED_BUFFER)
error("Tried to start an ed session, when already active.\n");
/*
* Check for read on startup, since the buffer is read in. But don't
* check for write, since we may want to change the file name.
*/
new_path = check_valid_path(file_arg, command_giver, "ed_start", 0);
if (!file_arg && !new_path)
return;
/* Never trust the master... in might be as paranoid as ourselves... */
/* Starting another ed session in valid_read() looks stupid, but
* possible.
*/
if (!command_giver ||
!command_giver->interactive ||
command_giver->flags & O_DESTRUCTED ||
EXTERN_ED_BUFFER)
{
return;
}
old_ed_buffer = ED_BUFFER;
EXTERN_ED_BUFFER =
ED_BUFFER = (struct ed_buffer *)xalloc(sizeof (struct ed_buffer));
memset((char *)ED_BUFFER, '\0',
sizeof (struct ed_buffer));
ED_BUFFER->truncflg = 1;
ED_BUFFER->flags |= EIGHTBIT_MASK;
ED_BUFFER->shiftwidth= 4;
prompt = query_prompt(command_giver);
ED_BUFFER->old_prompt = *prompt;
prompt->type = T_STRING;
prompt->x.string_type = STRING_CONSTANT;
prompt->u.string = ":";
ED_BUFFER->CurPtr =
&ED_BUFFER->Line0;
if (exit_fn) {
ED_BUFFER->exit_fn = string_copy(exit_fn);
exit_ob->ref ++ ;
} else {
ED_BUFFER->exit_fn = 0;
}
ED_BUFFER->exit_ob = exit_ob;
set_ed_buf();
push_apply_value();
push_object(command_giver);
setup = apply_master_ob("retrieve_ed_setup",1);
if ( setup && setup->type==T_NUMBER && setup->u.number ) {
ED_BUFFER->flags = setup->u.number & ALL_FLAGS_MASK;
ED_BUFFER->shiftwidth = setup->u.number & SHIFTWIDTH_MASK;
}
/* It is possible to toggle P_DIAG in retrieve_ed_setup() , by issueing
* an 'n' command(), which will cause add_message() to be called in
* do_read(); add_message might in turn call apply() via
* shadow_catch_message(), thus new_path needs to stay pushed.
*/
if( new_path && !doread(0, new_path)) {
setCurLn( 1 );
}
if (new_path) {
strncpy(P_FNAME, new_path, MAXFNAME-1);
P_FNAME[MAXFNAME-1] = 0;
add_message("/%s, %d lines\n", new_path, P_LASTLN);
} else {
add_message("No file.\n");
}
pop_apply_value();
ED_BUFFER = old_ed_buffer;
return;
}
#ifdef MALLOC_smalloc
void clear_ed_buffer_refs(b)
struct ed_buffer *b;
{
struct object *ob;
if (b->exit_fn) {
if (ob = b->exit_ob) {
if (ob->flags & O_DESTRUCTED) {
reference_destructed_object(ob);
b->exit_ob = 0;
} else {
ob->ref++;
}
}
}
clear_ref_in_vector(&b->old_prompt, 1);
}
void count_ed_buffer_refs(b)
struct ed_buffer *b;
{
struct object *ob;
LINE *line;
if (b->LastLn) {
line = b->Line0.l_next;
while(line != &b->Line0) {
note_malloced_block_ref((char *)line);
line = line->l_next;
}
}
if (b->exit_fn) {
note_malloced_block_ref(b->exit_fn);
if (ob = b->exit_ob) {
if (ob->flags & O_DESTRUCTED) {
reference_destructed_object(ob);
b->exit_ob = 0;
} else {
ob->ref++;
}
}
}
if (b->oldpat)
note_malloced_block_ref((char *)b->oldpat);
count_ref_in_vector(&b->old_prompt, 1);
}
#endif /* MALLOC_smalloc */
#ifdef DEBUG
void count_ed_buffer_extra_refs(b)
struct ed_buffer *b;
{
struct object *ob = b->exit_ob;
ob->extra_ref++;
}
#endif
/* After calling this function, ED_BUFFER won't be referenced unless set anew
* There must be no errors here, because there might be a call from
* remove_interactive() .
*/
void free_ed_buffer() {
char *name;
struct object *ob;
#ifdef DEBUG
if (!command_giver || !command_giver->interactive)
fatal("Call of free_ed_buffer without interactive command_giver\n");
#endif
clrbuf();
ob = ED_BUFFER->exit_ob;
name = ED_BUFFER->exit_fn;
transfer_svalue( query_prompt(command_giver), &ED_BUFFER->old_prompt );
if(P_OLDPAT)
xfree((char *)P_OLDPAT);
xfree((char *)ED_BUFFER);
EXTERN_ED_BUFFER = 0;
if (name) {
if (!ob || ob->flags & O_DESTRUCTED) {
debug_message("ed: exit_ob destructed at eof.\n");
} else {
struct object *save = current_object;
current_object = ob;
secure_apply(name, ob, 0); /* might call efun ed,
* thus setting (EXTERN_)ED_BUFFER again */
current_object = save;
}
if (ob)
free_object(ob, "ed EOF");
xfree(name);
} else {
add_message("Exit from ed.\n");
}
return;
}
void ed_cmd(str)
char *str;
{
int status;
struct ed_buffer *old_ed_buffer;
old_ed_buffer = ED_BUFFER;
ED_BUFFER = EXTERN_ED_BUFFER;
if (P_MORE) {
print_help2();
ED_BUFFER = old_ed_buffer;
return;
}
if (P_APPENDING) {
more_append(str);
ED_BUFFER = old_ed_buffer;
return;
}
if (strlen(str) < MAXLINE)
strcat(str, "\n");
strncpy(inlin, str, MAXLINE-1);
inlin[MAXLINE-1] = 0;
inptr = inlin;
if( (status = getlst()) >= 0)
if((status = ckglob()) != 0) {
if(status >= 0 && (status = doglob()) >= 0) {
setCurLn( status );
ED_BUFFER = old_ed_buffer;
return;
}
} else {
if((status = docmd(0)) >= 0) {
if(status == 1)
doprnt(P_CURLN, P_CURLN);
ED_BUFFER = old_ed_buffer;
return;
}
}
switch (status) {
case EOF:
free_ed_buffer();
ED_BUFFER = old_ed_buffer;
return;
#ifdef FATAL
case FATAL:
if (ED_BUFFER->exit_fn) {
xfree(ED_BUFFER->exit_fn);
free_object(ED_BUFFER->exit_ob, "ed FATAL");
}
xfree((char *)ED_BUFFER);
EXTERN_ED_BUFFER = 0;
add_message("FATAL ERROR\n");
set_prompt("> ");
ED_BUFFER = old_ed_buffer;
return;
#endif
case CHANGED:
add_message("File has been changed.\n");
break;
case SET_FAIL:
add_message("`set' command failed.\n");
break;
case SUB_FAIL:
add_message("string substitution failed.\n");
break;
case MEM_FAIL:
add_message("Out of memory: text may have been lost.\n" );
break;
default:
add_message("Unrecognized or failed command.\n");
/* Unrecognized or failed command (this */
/* is SOOOO much better than "?" :-) */
}
ED_BUFFER = old_ed_buffer;
}
void save_ed_buffer()
{
struct svalue *stmp;
char *fname;
struct interactive *save = command_giver->interactive;
ED_BUFFER = EXTERN_ED_BUFFER;
push_string_shared(P_FNAME);
stmp = apply_master_ob("get_ed_buffer_save_file_name",1);
save->catch_tell_activ = 0;
command_giver = save->ob;
if (stmp) {
if (stmp->type == T_STRING) {
fname = stmp->u.string;
if (*fname == '/') fname++;
dowrite(1, P_LASTLN, fname , 0);
}
}
free_ed_buffer();
}
struct object *ed_exit_object(buffer)
struct ed_buffer *buffer;
{
return buffer->exit_ob;
}
static void print_help(arg)
int arg;
{
switch (arg) {
case 'I':
add_message("This command indents your entire file under the\n");
add_message("assumption that it is LPC code. It is only useful\n");
add_message("for files that are not yet indented, since the\n");
add_message("indentation style is unlikely to satisfy anyone.\n");
add_message("Originally from DGD ed.\n");
break;
#if 0
case '^':
add_message("Command: ^ Usage: ^pattern\n");
add_message("This command is similiar to grep, in that it searches the\n");
add_message("entire file, printing every line that contains the specified\n");
add_message("pattern. To get the line numbers of found lines, turn on line\n");
add_message("number printing with the 'n' command.\n");
break;
#endif
case 'n':
add_message("Command: n Usage: n\n");
add_message("This command toggles the internal flag which will cause line\n");
add_message("numbers to be printed whenever a line is listed.\n");
break;
case 'a':
add_message("Command: a Usage: a\n");
add_message("Append causes the editor to enter input mode, inserting all text\n");
add_message("starting AFTER the current line. Use a '.' on a blank line to exit\n");
add_message("this mode.\n");
break;
case 'A':
add_message("Command: A Usage: A\n\
Like the 'a' command, but uses inverse autoindent mode.\n");
break;
case 'i':
add_message("Command: i Usage: i\n");
add_message("Insert causes the editor to enter input mode, inserting all text\n");
add_message("starting BEFORE the current line. Use a '.' on a blank line to exit\n");
add_message("this mode.\n");
break;
case 'c':
add_message("Command: c Usage: c\n");
add_message("Change command causes the current line to be wiped from memory.\n");
add_message("The editor enters input mode and all text is inserted where the previous\n");
add_message("line existed.\n");
break;
case 'd':
add_message("Command: d Usage: d or [range]d\n");
add_message("Deletes the current line unless preceeded with a range of lines,\n");
add_message("then the entire range will be deleted.\n");
break;
case 'e':
add_message("Commmand: e Usage: e filename\n");
add_message("Causes the current file to be wiped from memory, and the new file\n");
add_message("to be loaded in.\n");
break;
case 'E':
add_message("Commmand: E Usage: E filename\n");
add_message("Causes the current file to be wiped from memory, and the new file\n");
add_message("to be loaded in. Different from 'e' in the fact that it will wipe\n");
add_message("the current file even if there are unsaved modifications.\n");
break;
case 'f':
add_message("Command: f Usage: f or f filename\n");
add_message("Display or set the current filename. If filename is given as \nan argument, the file (f) command changes the current filename to\nfilename; otherwise, it prints the current filename.\n");
break;
case 'g':
add_message("Command: g Usage: g/re/p\n");
add_message("Search in all lines for expression 're', and print\n");
add_message("every match. Command 'l' can also be given\n");
add_message("Unlike in unix ed, you can also supply a range of lines\n");
add_message("to search in\n");
add_message("Compare with command 'v'.\n");
break;
case 'h':
add_message("Command: h Usage: h or hc (where c is a command)\n");
add_message("Help files added by Qixx.\n");
break;
case 'j':
add_message("\
Command: j Usage: j or [range]j\n\
Join Lines. Remove the NEWLINE character from between the two\n\
addressed lines. The defaults are the current line and the line\n\
following. If exactly one address is given, this command does\n\
nothing. The joined line is the resulting current line.\n");
break;
case 'k':
add_message("\
Command: k Usage: kc (where c is a character)\n\
Mark the addressed line with the name c, a lower-case\n\
letter. The address-form, 'c, addresses the line\n\
marked by c. k accepts one address; the default is the\n\
current line. The current line is left unchanged.\n");
break;
case 'l':
add_message("\
Command: l Usage: l or [range]l\n\
List the current line or a range of lines in an unambiguous\n\
way such that non-printing characters are represented as\n\
symbols (specifically New-Lines).\n");
break;
case 'm':
add_message("\
Command: m Usage: mADDRESS or [range]mADDRESS\n\
Move the current line (or range of lines if specified) to a\n\
location just after the specified ADDRESS. Address 0 is the\n\
beginning of the file and the default destination is the\n\
current line.\n\
");
break;
case 'p':
add_message("\
Command: p Usage: p or [range]p\n\
Print the current line (or range of lines if specified) to the\n\
screen. See the commands 'n' and 'set' if line numbering is desired.\n");
break;
case 'q':
add_message("\
Command: q Usage: q\n\
Quit the editor. Note that you can't quit this way if there\n\
are any unsaved changes. See 'w' for writing changes to file.\n");
break;
case 'Q':
add_message("\
Command: Q Usage: Q\n\
Force Quit. Quit the editor even if the buffer contains unsaved\n\
modifications.\n");
break;
case 'r':
add_message("\
Command: r Usage: r filename\n\
Reads the given filename into the current buffer starting\n\
at the current line.\n");
break;
case 't':
add_message("\
Command: t Usage: tADDRESS or [range]tADDRESS\n\
Transpose a copy of the current line (or range of lines if specified)\n\
to a location just after the specified ADDRESS. Address 0 is the\n\
beginning of the file and the default destination\nis the current line.\n");
break;
case 'v':
add_message("\
Command: v Usage: v/re/p\n\
Search in all lines without expression 're', and print\n\
every match. Other commands than 'p' can also be given\n\
Compare with command 'g'.\n");
break;
case 'z':
add_message("\
Command: z Usage: z or z- or z.\n\
Displays 20 lines starting at the current line.\n\
If the command is 'z.' then 20 lines are displayed being\n\
centered on the current line. The command 'z-' displays\n\
the 20 lines before the current line.\n");
break;
case 'Z':
add_message("\
Command: Z Usage: Z or Z- or Z.\n\
Displays 40 lines starting at the current line.\n\
If the command is 'Z.' then 40 lines are displayed being\n\
centered on the current line. The command 'Z-' displays\n\
the 40 lines before the current line.\n");
break;
case 'x':
add_message("\
Command: x Usage: x\n\
Save file under the current name, and then exit from ed.\n");
break;
case 's':
if ( *inptr=='e' && *(inptr+1)=='t' ) {
add_message("\
Without arguments: show current settings.\n\
'set save' will preserve the current settings for subsequent invocations of ed.\n\
Options:\n\
\n\
number will print line numbers before printing or inserting a lines\n\
list will print control characters in p(rint) and z command like in l(ist)\n\
print will show current line after a single substitution\n\
eightbit\n\
autoindent will preserve current indentation while entering text.\n\
use ^D or ^K to get back one step back to the right.\n\
excompatible will exchange the meaning of \\( and ( as well as \\) and )\n\
\n\
An option can be cleared by prepending it with 'no' in the set command, e.g.\n\
'set nolist' to turn off the list option.\n\
\n\
set shiftwidth <digit> will store <digit> in the shiftwidth variable, which\n\
determines how much blanks are removed from the current indentation when\n\
typing ^D or ^K in the autoindent mode.\n");
break;
} else {
/* is there anyone who wants to add an exact description for the 's' command? */
}
case 'w':
case 'W':
case '/':
case '?':
add_message("Sorry no help yet for this command. Try again later.\n");
break;
default:
add_message(" Help for Ed (V 2.0)\n");
add_message("---------------------------------\n");
add_message(" by Qixx [Update: 7/10/91]\n");
add_message("\n\nCommands\n--------\n");
add_message("/\tsearch forward for pattern\n");
add_message("?\tsearch backward for a pattern\n");
/* add_message("^\tglobal search and print for pattern\n"); */
add_message("=\tshow current line number\n");
add_message("a\tappend text starting after this line\n");
add_message("A\tlike 'a' but with inverse autoindent mode\n"),
add_message("c\tchange current line, query for replacement text\n");
add_message("d\tdelete line(s)\n");
add_message("e\treplace this file with another file\n");
add_message("E\tsame as 'e' but works if file has been modified\n");
add_message("f\tshow/change current file name\n");
add_message("g\tSearch and execute command on any matching line.\n");
add_message("h\thelp file (display this message)\n");
add_message("i\tinsert text starting before this line\n");
add_message("I\tindent the entire file (from DGD ed v0.1)\n");
add_message("\n--Return to continue--");
P_MORE=1;
break;
}
}
static void print_help2() {
P_MORE=0;
add_message("\
j\tjoin lines together\n\
k\tmark this line with a character - later referenced as 'a\n\
l\tline line(s) with control characters displayed\n\
m\tmove line(s) to specified line\n\
n\ttoggle line numbering\n\
p\tprint line(s) in range\n\
q\tquit editor\n\
Q\tquit editor even if file modified and not saved\n\
r\tread file into editor at end of file or behind the given line\n\
s\tsearch and replace\n\
set\tquery, change or save option settings\n\
t\tmove copy of line(s) to specified line\n\
v\tSearch and execute command on any non-matching line.\n\
x\tsave file and quit\n\
w\twrite to current file (or specified file)\n\
W\tlike the 'w' command but appends instead\n\
z\tdisplay 20 lines, possible args are . + -\n\
Z\tdisplay 40 lines, possible args are . + -\n\
\n\
For further information type 'hc' where c is the command\n\
that help is desired for.\n");
}