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tvx_io.c
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tvx_io.c
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/* ------------------------ tvx_io.c ---------------------------- */
#include "tvx_defs.ic"
#include "tvx_glbl.ic"
#define SWITCH '-'
#define FILESEP '.'
#ifdef MSDOS
#define TEMPEXT ".$$1" /* name of temporary file */
#define BACKEXT ".BAK" /* name of backup file */
#endif
#ifdef OSCPM
#define TEMPEXT ".$$1" /* name of temporary file */
#define BACKEXT ".BAK" /* name of backup file */
#endif
#ifdef GEMDOS
#define TEMPEXT ".Z1X" /* name of temporary file */
#define BACKEXT ".BAK" /* name of backup file */
#endif
#ifdef UNIX
#define BACKEXT ".B" /* name of backup file */
#endif
FILE *fopen();
/* local globals (used by tv terminal driver section) */
static int linptr; /* common "linot" */
static char linout[242];
static char stemp[FNAMESIZE+1];
/* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
FILE IO section
File handling algorithm:
The original name specified on command line is called orig_file.
It will remain untouched throughout the editing session. At the
very end (normal exit), it will be renamed to the ".BAK" name.
source_file is the current name of the file with source. It will
orignally be the same as orig_file, but may change to a generated
scratch name depending on the operating system. source_file is
always the lastest fully written version of the file (like after
file beginning, for example).
work_file is the output file. On normal exit, this is the
file renamed to dest_file. On buffer beginning, it will be
moved to source_file, possibly after renameing.
dest_file is the ultimate destination file. This name is not
actually used until the final rename on normal exit. It is
checked to be sure it is a valid name to be opened, however.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
/* =============================>>> ABORT <<<============================= */
abort()
{ /* abort - close files, abort operation */
char rply[4];
tvclr();
ask("Abort, are you sure? ",rply,1);
if (clower(rply[0]) != 'y')
{
verify(1);
return;
}
abort2();
}
/* =============================>>> ABORT2 <<<============================= */
abort2()
{
clobak();
tvclr();
if (!newfil)
fclose(infile);
if (!rdonly)
fclose(outfile);
if (strcmp(orig_file,source_file) != 0)
{
prompt("File begin used, intermediate edits in: ");
remark(source_file);
}
unlink(work_file); /* delete the work file */
reset();
quit();
}
/* =============================>>> FBEG <<<============================= */
int fbeg()
{ /* fbeg - go back to file top */
SLOW int fbegv;
if (rdonly)
{
tverrb("Can't: R/O"); /* can't do this for read only access */
return (FALSE);
}
for (wtpage(1) ; rdpage() ; wtpage(1) ) /* write out rest */
;
if ((! newfil))
{
fclose(infile); /* close source_file */
}
if (usecz)
fputc(ENDFILE,outfile);
fclose(outfile); /* close work_file */
/* files closed now, re-open */
newfil = FALSE; /* not a new file any more */
strcpy(source_file,work_file); /* new source file */
temp_name(work_file,FALSE); /* make a new temporary name */
if (!(infile = fopen(source_file,FILEREAD)))
goto l900;
else
ineof = FALSE;
unlink(work_file); /* get rid of previous copies */
if (!(outfile = fopen(work_file,FILEWRITE)))
{
goto l900;
}
fbegv=rdpage(); /* read in new buffer */
newscr();
return (fbegv);
l900: tverrb("Error re-opening");
return (FALSE);
}
/* =============================>>> FILE_EXIT <<<============================= */
file_exit()
{ /* close the input and output files, rename */
SLOW int i;
if (!newfil) /* don't close input if new file */
{
fclose(infile);
}
while (!rdonly && !*dest_file)
{
remark("No name for output file has been specified.");
prompt("Enter new name for output file: ");
reply(dest_file,FNAMESIZE);
}
if (!rdonly) /* don't close output if read only access */
{
if (usecz)
fputc(ENDFILE,outfile);
set_mode(outfile); /* set output mode if can */
fclose(outfile);
/* orig_file has the name to be renamed to .bak
work_file has the file name we want to be dest_name
*/
if (strcmp(orig_file,dest_file) == 0) /* make backup version */
{
strcpy(stemp,orig_file);
#ifndef COMMA_BAK
if ((i = rindx(stemp,FILESEP)) > 0) /* see if extenstion */
scopy(BACKEXT,0,stemp,i); /* make .bak */
else
{
scopy(BACKEXT,0,stemp,strlen(stemp)); /* just add on */
}
#else
i = rindx(orig_file,'/')+1;
scopy(".,",0,stemp,i);
scopy(orig_file,i,stemp,strlen(stemp));
#endif
unlink(stemp); /* delete previous generation */
ren_file(orig_file,stemp); /* rename the file */
if (!makebackup) /* don't want to keep old one */
unlink(stemp); /* delete it if don't want backup file */
}
if (strcmp(orig_file,source_file) != 0) /* delete intermediate file */
unlink(source_file);
while (infile = fopen(dest_file,FILEREAD)) /* output exists? */
{
fclose(infile);
prompt("Output file "); prompt(dest_file);
prompt(" already exists. Overwrite it? (y/n) ");
ureply(stemp,1);
if (*stemp == 'Y')
{
unlink(dest_file);
break;
}
prompt("Enter new name for output file: ");
reply(dest_file,FNAMESIZE);
}
ren_file(work_file,dest_file); /* finally, rename last file */
}
}
/* =============================>>> FOPENX <<<============================= */
fopenx(argc,argv)
int argc;
char *argv[];
{ /* open the input file
This routine picks up file name from the user, creates a backup
version in some appropriate manner, and opens the file for input
and output. */
SLOW int iswval, iswbeg, argnum, set_ttymode;
SLOW char ch, tmpc;
char rply[4];
usebak = logdef; /* if useing backup log file */
ttymode = FALSE; /* not in tty mode, so io ok */
ttynext = 1000; /* force read */
if (argc <= 1)
{
remark("Usage: tvx filename [-b -i -l -o=f -r -s -t -w -# {-z -c=f}]");
#ifdef FULLHELP
remark("");
starthelp(); /* print start help message */
prompt(" Options: "); remark(VERSION);
remark(" -[no]b : backup file -[no]i : autoindent");
remark(" -[no]l : make command log file");
remark(" -o=outputfile -r : read only");
remark(" -s : big save buff -[no]w : word processing mode");
remark(" -t : tty edit mode -# : set virtual window lines to #");
#ifdef MSDOS
remark(" -[no]z : use control-z for end of file");
#endif
#ifdef CONFIGFILE
#ifdef MSDOS
remark(" -c=configfile -c : use /bin/config.tvx");
#endif
#ifdef GEMDOS
remark(" -c=configfile -c : use /bin/config.tvx");
#endif
#ifdef OSCPM
remark(" -c=configfile -c : use A:config.tvx");
#endif
#endif
#ifdef UNIX
remark(" {options not available for unix}");
#endif
#endif
remark("");
reset();
quit();
}
newfil= /* assume opening an old file */
rdonly = FALSE; /* assume not read only */
makebackup = MAKE_BACKUP; /* default value for make a backup */
blimit = BUFFLIMIT;
for (argnum = 1 ; argnum < argc ; ++argnum)
{
strcpy(stemp,argv[argnum]); /* pick up the file name or switch */
REDO:
if (stemp[0] == SWITCH) /* switch in form "/R filename" only */
{
iswbeg=1; /* start at 1 */
iswval = TRUE;
if (clower(stemp[1]) == 'n' && clower(stemp[2]) == 'o')
{
iswval = FALSE ; iswbeg = 3 ;
}
ch = clower(stemp[iswbeg]); /* get the char */
if (ch == 'r') /* read only access */
rdonly=iswval;
else if (ch == 'i') /* auto indent */
autoin = iswval;
else if (ch == 'w') /* word processing mode */
{
if (iswval)
wraplm = 70;
else
wraplm = 0;
}
else if (ch == 'l') /* log file */
usebak = iswval;
else if (ch == 'b')
makebackup = iswval; /* make a backup file */
else if (ch == 'z')
usecz = iswval;
else if (ch == 'o' && (stemp[iswbeg+1] == '=' ||
stemp[iswbeg+1] == ':')) /* specifying output */
{
if (!iswval) /* wrong order! */
{
remark("Bad -O= switch");
quit();
}
scopy(stemp,iswbeg+2,dest_file,0); /* remember name */
}
#ifdef CONFIGFILE
else if (stemp[iswbeg] == 'c' && stemp[iswbeg+1] == 0) /* default cfg */
{
strcpy(stemp,cfgname);
goto REDO;
}
else if (stemp[iswbeg] == 'c' && (stemp[iswbeg+1] == '=' ||
stemp[iswbeg+1] == ':')) /* specifying config */
{
expand_name(&stemp[iswbeg+2]);
if ((bkuin = fopen(&stemp[iswbeg+2],FILEREAD))==0)
{
remark("Can't open configuration file.");
continue;
}
rdcfg(lexsym,LEXVALUES+1);
rdcfg(synofr,20);
rdcfg(synoto,20);
rdcfg(funchar,50);
rdcfg(funcmd,50);
rdcfg(&funkey,1);
rdcfg(&tmpc,1); autoin = (int) tmpc;
rdcfg(&tmpc,1); ddline = (int) tmpc;
rdcfg(&tmpc,1); dscrl = (int) tmpc;
rdcfg(&tmpc,1); dxcase = (int) tmpc;
rdcfg(&tmpc,1); wraplm = (int) tmpc;
rdcfg(&tmpc,1); use_wild = (int) tmpc;
rdcfg(&tmpc,1); usebak = (int) tmpc;
logdef = usebak;
rdcfg(&tmpc,1); cut_mode = (int) tmpc;
#ifdef MSDOS
rdcfg(&tmpc,1); usecz = (int) tmpc;
#endif
#ifdef GEMDOS
rdcfg(&tmpc,1); usecz = (int) tmpc;
#endif
fclose(bkuin);
}
#endif
else if (ch == 's') /* big save buffer */
{
if (!iswval)
blimit=BUFFLIMIT;
else
blimit=BUFFLIMIT*3;
}
#ifndef VTERM
else if (ch == 't') /* tty mode */
set_ttymode = iswval; /* make a backup file */
#endif
else if (ch >= '0' && ch <= '9') /* making a virtual window */
{
tvlins = atoi(&stemp[iswbeg]); /* get virtual screen size */
if (tvlins < 3 || tvlins > tvhardlines) /* invalid window */
{
remark("Invalid window size");
tvlins = tvhardlines;
}
else
{
ddline = (tvlins / 2) + 1; /* fix home line */
setdscrl();
}
}
else /* illegal switch */
{
prompt("Unknown switch -"); ttwt(ch);
prompt(": Ignore and continue? (y/n) ");
ureply(rply,1);
if (*rply != 'Y')
{
reset(); quit();
}
}
}
else /* must have a file name */
{
strcpy(orig_file,stemp);
}
} /* end for */
/* now open file properly - make copies to all 4 names */
GETNAME:
while (!*orig_file)
{
ask("Edit file? ",orig_file,FNAMESIZE);
}
expand_name(orig_file); /* expand on unix */
if (!(infile = fopen(orig_file,FILEREAD))) /* can open? */
{
prompt("Create file "); prompt(orig_file);
prompt("? (y/n) ");
ureply(rply,1);
if (*rply != 'Y')
{
*orig_file = 0; goto GETNAME;
}
if (*dest_file)
remark("New file, -o= switch ignored");
*dest_file = 0;
newfil = TRUE; /* a new file */
rdonly = FALSE;
}
/* orig_file now has the name of the source file, and it might be open */
ineof = FALSE;
strcpy(source_file,orig_file); /* copy to other names */
strcpy(work_file,orig_file);
if (!*dest_file) /* no -o specified */
strcpy(dest_file,orig_file);
if (!newfil) /* not new file */
{
fclose(infile); /* close orig file */
if (!(infile = fopen(source_file,FILEREAD))) /* re-open */
{
remark("Internal editor error, aborting");
exit(100);
}
get_mode(infile); /* get mode of original file */
}
else
{
*orig_file = *source_file = 0;
}
/* now see if we can make an output file */
if (!rdonly)
{
temp_name(work_file,TRUE); /* make into a temporary name 1st time */
if ((outfile = fopen(work_file,FILEREAD)))
{
/* this code is needed when the temp_name might not be
unique - which happens when you push (^O) and try to
edit a file with the same main name but perhaps a different
extension - the temp file will be the same, and the child
version of tvx will then delete the temprorary file created
by the parent. This can happen again if fbeg, but let's
assume the 'y' applies forever.
*/
fclose(outfile); /* close up the file */
prompt("Work file already exists: ");
remark(work_file);
prompt("Erase it and continue with editing? (y/n) ");
ureply(rply,1);
if (*rply != 'Y')
{
reset();
exit(100); /* abnormal exit */
}
}
unlink(work_file); /* get rid if already there */
if (!(outfile = fopen(work_file,FILEWRITE)))
{
prompt("Unable to create output work file: ");
remark(work_file);
if (!newfil)
{
prompt("Continue in read only mode? (y/n) ");
ureply(rply,1);
if (*rply != 'Y')
{
fclose(infile);
reset();
exit(100); /* abnormal exit */
}
}
*dest_file = *work_file = 0;
rdonly = TRUE;
}
}
else
{
*dest_file = *work_file = 0;
}
ttymode = force_tty ? TRUE : set_ttymode; /* now safe to set ttymode */
}
/* =============================>>> setdscrl <<<============================= */
setdscrl()
{ /* compute a new value for dscrl */
if (dscrl == 0)
return; /* if already 0, don't change */
dscrl = tvlins / 3;
if ((ddline + dscrl) >= tvlins) /* looks ugly if hits last line */
dscrl--;
if (dscrl < 0) /* don't allow this */
dscrl = 0;
}
#ifdef CONFIGFILE
/* =============================>>> RDCFG <<<============================= */
rdcfg(toset,cnt)
char *toset;
int cnt;
{ /* read cnt vals from bkuin */
FAST int i,val;
for (i = 0 ; i < cnt ; ++i)
{
if ((val = fgetc(bkuin)) == EOF)
{
remark("Invalid configuration file, aborting");
fclose(bkuin);
quit();
}
*toset++ = val; /* replace with new commands */
}
}
#endif
/* =============================>>> ADDFIL <<<============================= */
int addfil(rw)
int rw;
{ /* addfil - add contents of external file to save buffer
positive means read into buffer, negative means write save buffer */
SLOW int chr;
SLOW int limit;
SLOW BUFFINDEX fromch;
SLOW int i;
SLOW FILE *f;
if (rw >= 0) /* read a file */
{
if (!gbgcol(nxtchr)) /* gc first */
{
newscr();
tverrb("No save room");
return (FALSE);
}
tvclr();
#ifdef LASL
ask("Read external filename: ",stemp,FNAMESIZE);
#else
ask("Yank filename: ",stemp,FNAMESIZE);
#endif
expand_name(stemp); /* expand on some systems */
if (!(f = fopen(stemp,FILEREAD)) || !*stemp)
{
newscr();
#ifdef LASL
tverrb(" Unable to open external file ");
#else
tverrb(" Unable to open yank file ");
#endif
return (FALSE);
}
savlin=0 ; savlen=0 ; nxtsav =mxbuff ; /* clear out save buffer */
limit = max(nxtchr,mxbuff/2) + ALMOSTOUT;
do
{
if ((chr = getchr(f)) < 0)
{
newscr();
fclose(f);
return (TRUE);
}
if (chr == NEWLINE)
{
#ifdef FILELF
getchr(f);
#endif
chr=ENDLINE;
++savlin;
}
*(buff+nxtsav--) = chr;
if (nxtsav <= limit)
{
newscr();
tverrb("File only partly read");
break;
}
}
while (1);
fclose(f);
return (TRUE);
}
/* --------------- to here, then writing from save buffer --------------*/
if (nxtsav==mxbuff) /* nothing to save */
{
tverrb("Save buffer empty!");
return (TRUE);
}
tvclr();
ask("Write to external filename: ",stemp,FNAMESIZE);
expand_name(stemp); /* expand on some systems */
if (!(f = fopen(stemp,FILEWRITE)) || !*stemp)
{
newscr();
tverrb(" Unable to open external file ");
return (FALSE);
}
/* # move down line to make space for new */
fromch = mxbuff; /* where taking saved stuff from */
for (i = 0 ; i < savlin ; ++i)
{
for ( ; ; ) /* scan save buffer */
{
if ((chr = *(buff+fromch--)) == ENDLINE)
{
fputc(NEWLINE,f);
#ifdef FILELF
fputc(LF,f);
#endif
break;
}
else
fputc(chr,f);
}
}
if (usecz)
fputc(ENDFILE,f);
fclose(f);
newscr();
return (TRUE);
}
/*=============================>>> SCOPY <<<================================*/
scopy(old,oldbeg,new,newbeg)
char old[], new[];
int oldbeg,newbeg;
{
while (old[oldbeg])
new[newbeg++]=old[oldbeg++];
new[newbeg] = 0;
}
/* **************************************************************************
Following code is for non-unix systems
**************************************************************************** */
#ifndef UNIX
/* =============================>>> get_mode <<<============================= */
get_mode(f)
FILE *f;
{ /* gets access mode of open file f */
}
/* =============================>>> set_mode <<<============================= */
set_mode(f)
FILE *f;
{ /* sets access mode of open file f */
}
/* ==========================>>> expand_name <<<============================ */
expand_name(n)
char *n;
{ /* expands unix file names */
}
/* =============================>>> ren_file <<<=========================== */
ren_file(old,new)
char *old, *new;
{
#ifndef GEMDOS
if (rename(old,new) != 0)
{
prompt(old) ; prompt(" not renamed to "); remark(new);
}
#endif
#ifdef GEMDOS
gemdos(0x56,0,old,new); /* can't find C version */
#endif
}
/* =============================>>> temp_name <<<=========================== */
temp_name(n,first)
char *n;
int first;
{
/* generates a temporary name from n. Depending on value of
first, it will either add a 1 or 2 to name */
SLOW int i;
if (first)
{
if ((i = rindx(n,FILESEP)) > 0) /* see if extenstion */
scopy(TEMPEXT,0,n,i); /* make .bak */
else
{
scopy(TEMPEXT,0,n,strlen(n)); /* just add on */
}
}
else
{
i = strlen(n);
if (n[i-1] == '1')
n[i-1] = '2';
else
n[i-1] = '1';
}
}
#endif
/* **************************************************************************
This section is for the version supporting command logfile
backup. The code necessary for this version is included here,
and may be compiled by defining VB to be a blank.
**************************************************************************** */
/* =============================>>> OPNBAK <<<============================= */
opnbak()
{
/* opnbak - open the backup log file
if VB defined as ' ', then backup version created */
#ifdef VB
if (! usebak)
{
bakflg = FALSE;
return;
}
bkuout = fopen(BACKUPNAME,FILEWRITE);
bakpos = 1;
#endif
}
/* =============================>>> PUTBAK <<<============================= */
putbak(chr)
char chr;
{ /* putbak - put a character into the backup file */
#ifdef VB
static char copy;
if (! usebak)
return;
copy=chr;
if (copy < 32 || copy == '@' || copy==delkey)
{
fputc('@',bkuout);
bakcrlf();
if (copy < 32)
copy += '@';
else if (copy==delkey)
copy = '?'; /* let @? be rubout */
}
fputc(copy,bkuout);
bakcrlf();
#endif
}
#ifdef VB
/* =============================>>> BAKCRLF <<<============================= */
bakcrlf()
{ /* conditionally put a cr/lf to backup file */
if (++bakpos > 63)
{
fputc(NEWLINE,bkuout);
#ifdef FILELF
fputc(LF,bkuout);
#endif
bakpos = 1;
}
}
#endif
/* =============================>>> CLOBAK <<<============================= */
clobak()
{
#ifdef VB
if (! usebak)
return;
fputc(NEWLINE,bkuout);
#ifdef FILELF
fputc(LF,bkuout);
#endif
if (usecz)
fputc(ENDFILE,bkuout);
fclose(bkuout);
#endif
}
/* =============================>>> GETBAK <<<============================= */
getbak(chr)
char *chr;
{ /* get one char from back up file if there */
#ifdef VB
SLOW int ich;
l10:
if ((ich = getchr(bkuin)) < 0 || ich == ENDFILE)
{
l15: fclose(bkuin);
*chr=0; /* harmless character */
bakflg=FALSE;
verify();
return;
}
if (ich == NEWLINE)
goto l10;
#ifdef FILELF
if (ich == LF)
goto l10;
#endif
*chr=ich;
if (ich=='@')
{
l20: if ((ich = getchr(bkuin)) < 0 || ich == ENDFILE)
{
goto l15;
}
if (ich == NEWLINE)
goto l20;
#ifdef FILELF
if (ich == LF)
goto l20;
#endif
*chr=ich;
if (ich == '?')
*chr=delkey;
else if (*chr != '@')
*chr= ich - '@';
}
#endif
}
/* =============================>>> OPNATF <<<============================= */
opnatf()
{ /* open an indirect command file */
#ifdef VB
tvclr();
ask("Name of command file: ",stemp,FNAMESIZE);
/* read in the file name from the terminal */
expand_name(stemp);
if (!*stemp)
{
verify();
return;
}
if (!(bkuin = fopen(stemp,FILEREAD)))
{
verify();
tverrb("Bad @ name");
return;
}
bakflg=TRUE;
newscr();
#endif
}
/* **************************************************************************
This section contains code to write and read buffers of data
**************************************************************************** */
/* =============================>>> RDPAGE <<<============================= */
int rdpage()
{ /* rdpage - read in file up to buffer limit
only place text read from edited file */
SLOW int chr;
SLOW int l,newlns;
#ifdef GETSIO
char inbuff[256];
FAST char *bp; /* ptr to inbuff */
SLOW int do_read; /* flag if need to read */
do_read = TRUE; /* need to do read first time */
#endif
if (newfil) /* can't read in when a new file */
{
return (FALSE);
}
if (nxtlin > mxline || nxtchr > mxbuff-130) /* error check */
{
tverrb("Lines filled ");
return (FALSE);
}
newlns=0; /* begin at the beginning */
while (mxline-nxtlin > LINELIMIT && nxtsav-nxtchr > blimit && !ineof)
{ /* read in while have room */
#ifdef GETSIO
if (do_read)
{
if (fgets(inbuff,255,infile) == NULL)
{
ineof = TRUE;
break;
}
do_read = FALSE; /* a line has been read */
bp = inbuff; /* point to beginning of buffer */
}
chr = *bp++; /* "read" the character */
#else
if ((chr = fgetc(infile)) == EOF)
{
ineof = TRUE;
break;
}
#endif
if (chr == ENDFILE && usecz)
{
ineof = TRUE;
break;
}
#ifdef FILELF
if (chr == LF)
continue;
#endif
*(buff+nxtchr) = BEGLINE;
*(lines+nxtlin) = nxtchr++;
++newlns ;
while (chr != NEWLINE) /* store a line */
{
*(buff+nxtchr++) = chr;
#ifdef GETSIO
chr = *bp++; /* "read" the character */
#else
if ((chr = fgetc(infile)) == EOF)
{
ineof = TRUE;
break;
}
#endif
if (chr == ENDFILE && usecz)
{
ineof = TRUE;
break;
}
} /* end of while != NEWLINE */
#ifdef GETSIO
do_read = TRUE;
#endif
*(buff+nxtchr++) = ENDLINE;