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exec.c
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exec.c
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#include "levee.h"
#include "extern.h"
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#if HAVE_ERRNO_H
#include <errno.h>
#endif
void undefine(int i);
void fixupline(int dft);
void doinput(int fileptr);
/* CAUTION: these make exec not quite recursive */
int high,low; /* low && high end of command range */
bool affirm; /* cmd! */
static char noalloc[] = " (out of memory)";
/*
* do a newline and set flags.
*/
#define exprintln() (zotscreen=YES),println()
void
plural(int num, char *string)
{
printi(num);
prints(string);
if (num != 1)
printch('s');
} /* plural */
void
clrmsg(void)
{
dgotoxy(0, -1);
dclear_to_eol();
} /* clrmsg */
void
errmsg(char *msg)
{
dgotoxy(0, -1);
prints(msg);
dclear_to_eol();
} /* errmsg */
/* get a space-delimited token */
static char *execstr;
void
setarg(char *s)
{
execstr = s;
}
static
char * getarg(void)
{
char *rv;
rv = execstr;
while (*execstr && !isspace(*execstr))
++execstr;
if (*execstr) {
*execstr++ = 0;
while (isspace(*execstr))
++execstr;
}
return (*rv) ? rv : NULL;
} /* getarg */
void
version(void)
/* version: print which version of levee we are... */
{
errmsg("levee (c)");prints(codeversion);
} /* version */
/* figure out a address range for a command */
char *
findbounds(char *ip)
{
/* get the low address */
logit(("findbounds: low (%d,&[%s],0)", curr, ip));
if ( (low = findparse(curr, &ip, 0)) > ERR )
low = bseekeol(low); /* at start of line */
else if (low != ERR_UNKNOWN) {
prints(expr_errstring(low));
return 0;
}
if (*ip == ',') { /* high address? */
int offset = 0;
ip++;
if ( *ip == '/' || *ip == '+' )
offset=1;
else if ( *ip == '?' || *ip == '-' )
offset=-1;
logit(("findbound: high (%d, &[%s], %d", low, ip, offset));
unless ( (high = findparse(curr, &ip, offset)) > ERR ) {
prints(expr_errstring(high));
return 0;
}
high = fseekeol(high);
}
logit(("findbounds: low=%d, high=%d", low, high));
return(ip);
}
void
show_args(void)
/* show_args: print the argument list */
{
register int i;
dgotoxy(0, -1);
logit(("show_args: there %s %d argument%s",
(args.gl_pathc == 1) ? "is" : "are",
args.gl_pathc,
(args.gl_pathc == 1) ? "." : "s."));
for (i=0; i < args.gl_pathc; i++) {
if (curpos.x+strlen(args.gl_pathv[i]) >= COLS)
exprintln();
else if (i > 0)
printch(' ');
if (filenm == i) d_highlight(1);
prints(args.gl_pathv[i]);
if (filenm == i) d_highlight(0);
}
} /* show_args */
void
setcmd(void)
{
bool no = NO,b;
char *arg, *num;
struct variable *vp;
if ( (arg = getarg()) ) {
do {
if (*arg != 0) {
if ( (num = strchr(arg, '=')) ) {
b = NO;
*num++ = 0;
}
else { /* set [no]opt */
b = YES;
if (arg[0]=='n' && arg[1]=='o') {
arg += 2;
no = NO;
}
else
no = YES;
}
for(vp=vars;vp->u && strcmp(arg,vp->v_name)
&& strcmp(arg,vp->v_abbr); vp++)
;
if (!vp->u || vp->v_flags & V_CONST) {
errmsg("Can't set ");
prints(arg);
}
else {
int j;
if (b)
if (vp->v_tipe == VBOOL)
vp->u->valu = no;
else
goto badsettype;
else if (vp->v_tipe == VSTR) {
if (vp->u->strp)
free(vp->u->strp);
vp->u->strp = (*num) ? strdup(num) : NULL;
}
else
if (*num && (j=atoi(num)) >= 0)
vp->u->valu = j;
else {
badsettype:
errmsg("bad set type");
continue;
}
redraw |= vp->v_flags & V_DISPLAY;
}
}
} while ( (arg = getarg()) );
}
else {
version(); exprintln();
for(vp=vars;vp->u;vp++) {
if ( vp->v_flags & V_ALIAS )
continue;
switch (vp->v_tipe) {
case VBOOL:
if (!vp->u->valu)
prints("no");
prints(vp->v_name);
break;
case VSTR:
if (!vp->u->strp)
prints("no ");
prints(vp->v_name);
if (vp->u->strp) {
dgotoxy(10, -1);
prints(" = ");
prints(vp->u->strp);
}
break;
default:
prints(vp->v_name);
dgotoxy(10, -1);
prints(" = ");
printi(vp->u->valu);
break;
}
exprintln();
}
}
} /* setcmd */
/* print a macro */
void
printone(int i)
{
if (i >= 0) {
exprintln();
printch(mbuffer[i].token);
dgotoxy(3, -1);
if (movemap[(unsigned int)(mbuffer[i].token)] == INSMACRO)
prints("!= ");
else
prints(" = ");
prints(mbuffer[i].m_text);
}
} /* printone */
/* print all the macros */
void
printall(void)
{
int i;
for (i = 0; i < MAXMACROS; i++)
if (mbuffer[i].token != 0)
printone(i);
} /* printall */
/* :map ch text */
void
map(bool insert)
{
char *macro, c;
int i;
/* get the macro */
if ((macro=getarg()) == NULL) {
printall();
return;
}
if (strlen(macro) > 1) {
errmsg("macros must be one character");
return;
}
c = macro[0];
if (*execstr == 0)
printone(lookup(c));
else {
if ((i = lookup(0)) < 0)
errmsg("macro table full");
else if (c == ESC || c == ':') {
errmsg("can't map ");
printch(c);
}
else if (*execstr != 0) {
undefine(lookup(c));
mbuffer[i].token = c;
mbuffer[i].m_text = strdup(execstr);
mbuffer[i].oldmap = movemap[(unsigned int)c];
if (insert)
movemap[(unsigned int)c] = INSMACRO;
else
movemap[(unsigned int)c] = SOFTMACRO;
}
}
} /* map */
void
undefine(int i)
{
char *p;
if (i >= 0) {
movemap[(unsigned int)(mbuffer[i].token)] = mbuffer[i].oldmap;
mbuffer[i].token = 0;
p = mbuffer[i].m_text;
free(p);
mbuffer[i].m_text = 0;
}
} /* undefine */
int
unmap(void)
{
int i;
char *arg;
if ( (arg=getarg()) ) {
if (strlen(arg) == 1) {
undefine(lookup(*arg));
return YES;
}
if (strcmp(arg,"all") == 0) {
for (i = 0; i < MAXMACROS; i++)
if (mbuffer[i].token != 0)
undefine(i);
return YES;
}
}
return NO;
} /* unmap */
/* return argument # of a filename */
int
findarg(register char *name)
{
int j;
for (j = 0; j < args.gl_pathc; j++)
if (strcmp(args.gl_pathv[j],name) == 0)
return j;
return -1;
} /* findarg */
/* add a filename to the arglist */
int
addarg(register char *name)
{
int where;
int rc;
if ((where = findarg(name)) >= 0 )
return where;
rc = os_glob(name, GLOB_APPEND|GLOB_NOMAGIC, &args);
return rc ? F_UNSET : args.gl_pathc-1;
} /* addarg */
/* s/[src]/dst[/options] */
/* s& */
void
cutandpaste(void)
{
bool askme = NO,
printme= NO,
glob = NO;
int newcurr = -1;
int oldcurr = curr;
int num;
char delim;
int lastlow;
register char *ip;
register char *dp;
zerostack(&undo);
logit(("cutandpaste: [%s]", execstr));
ip = execstr;
if (*ip != '&') {
delim = *ip++;
unless ( ip = makepat(ip,delim) ) /* get search */
goto splat;
dp = dst;
while (*ip && *ip != delim) {
if (*ip == '\\' && ip[1] != 0)
*dp++ = *ip++;
*dp++ = *ip++;
}
*dp = 0;
logit(("cutandpaste: replacement = [%s]", dst));
if (*ip == delim) {
while (*++ip)
switch (*ip) {
case 'q':
case 'c': askme = YES; break;
case 'g': glob = YES; break;
case 'p': printme= YES; break;
}
}
}
if (*lastpatt == 0) {
splat: errmsg("bad substitute");
return;
}
fixupline(bseekeol(curr));
lastlow = 0;
num = 0;
do {
unless ( (low = chop(low, &high, NO, &askme)) > ERR )
break;
redraw = YES;
num++;
if (printme) {
exprintln();
writeline(-1,-1,bseekeol(low));
}
if (newcurr < 0)
newcurr = low;
if (!glob)
low = 1+fseekeol(low);
if ( low < lastlow ) {
logit(("low went backwards: lastlow=%d, low=%d", lastlow, low));
errmsg("low went backwards?");
break;
}
lastlow = low;
} while (low > ERR);
if (num > 0) {
exprintln();
plural(num," substitution");
}
curr = (newcurr > -1) ? newcurr : oldcurr;
//fixupline((newcurr > -1) ? newcurr : oldcurr);
} /* cutandpaste */
/* quietly read in a file (and mark it in the undo stack)
*/
int
insertfile(FILE *f, int insert, int at, int *fsize)
{
int high,
onright,
rc=0;
onright = (bufmax-at);
high = EDITSIZE-onright;
if ( insert && (onright > 0) )
moveright(&core[at], &core[high], onright);
rc = addfile(f, at, high, fsize);
if ( (rc == 0) && (*fsize < 0) ) {
rc = -1;
*fsize=0;
}
if ( insert ) {
if ( *fsize )
insert_to_undo(&undo, at, *fsize);
modified = YES;
if (onright > 0)
moveleft(&core[high], &core[at+(*fsize)], onright);
}
redraw = YES;
return rc;
} /* insertfile */
void
inputf(register char *fname, bool newbuf)
{
FILE *f;
int fsize, /* bytes read in */
rc;
if (newbuf)
readonly = is_viewer;
zerostack(&undo);
if ( newbuf ) {
modified = NO;
low = 0;
}
else
fixupline(bseekeol(curr));
printch('"');
prints(fname);
prints("\" ");
if ((f=expandfopen(fname, "r")) == NULL) {
prints("[New file]");
fsize = 0;
if (newbuf)
newfile = YES;
redraw = TRUE;
}
else {
rc = insertfile(f, !newbuf, low, &fsize);
fclose(f);
if ( rc > 0 )
plural(fsize, " byte");
else if ( rc < 0 )
prints("[read error]");
else {
prints("[overflow]");
readonly=YES;
}
if (newbuf) newfile = NO;
}
if (newbuf) {
fillchar(contexts, sizeof(contexts), -1);
bufmax = fsize;
}
if (startcmd) {
int addr;
if ( (addr = findparse(low, &startcmd, 0)) > ERR ) {
if (*startcmd == 0 || *startcmd == ';' )
curr = addr;
}
else {
prints(" [");
prints(expr_errstring(addr));
printch(']');
}
startcmd = 0;
}
else
curr = low;
} /* inputf */
/* Change a file's name (for autocopy). */
void
backup(char *name)
{
char *back, *expanded;
int ok = NO;
if ( expanded = os_tilde(name) )
name = expanded;
if ( back = os_backupname(name) ) {
os_unlink(back);
ok = os_rename(name, back) == 0;
free(back);
}
unless (ok) {
prints(" (");
prints(strerror(errno));
prints(")");
}
if ( expanded )
free(expanded);
} /* backup */
bool
outputf(char *fname,int entire_file)
{
bool whole;
FILE *f;
int status;
zerostack(&undo); /* undo doesn't survive past write */
if ( entire_file ) {
high = bufmax-1;
low = 0;
}
else {
if (high < 0)
high = (low < 0) ? (bufmax-1) : (fseekeol(low));
if (low < 0)
low = 0;
}
logit(("outputf: entire_file = %d, low=%d, high=%d", entire_file, low, high));
high++;
printch('"');
prints(fname);
prints("\" ");
whole = (low == 0 && high >= (bufmax-1));
if (whole && autocopy)
backup(fname);
if ( (f=expandfopen(fname, "w")) ) {
status = putfile(f, low, high);
fclose(f);
if (status) {
plural(high-low," byte");
if (whole)
modified = NO;
return(YES);
}
else {
prints("[write error]");
os_unlink(fname);
}
}
else
prints(fisro);
return(NO);
} /* outputf */
int
oktoedit(int writeold)
/* check and see if it is ok to edit a new file */
/* automatically write out changes? */
{
unless (modified) /* no modifications? Yes. */ /* otherwise? Yes. */
return YES;
if (readonly || is_viewer) { /* readonly or in viewer mode? No. */
errmsg(fisro);
return NO;
}
if (affirm) /* :{cmd}! ? Yes. */
return YES;
/* no autowrite or filename? No. */
unless (writeold && (filenm != F_UNSET) ) {
errmsg(fismod);
return NO;
}
unless (outputf(args.gl_pathv[filenm], YES))
return NO; /* write error? No. */
prints(", ");
return YES; /* otherwise? Yes. */
} /* oktoedit */
/* write out all || part of a file */
bool
writefile(void)
{
char *name;
int fileptr = filenm;
unless (name=getarg())
name = (filenm == F_UNSET) ? NULL : args.gl_pathv[filenm];
unless (name) {
errmsg("no file to write");
return NO;
}
unless (outputf(name, NO))
return NO;
if ( (filenm == F_UNSET) && ((fileptr=addarg(name)) == F_UNSET) )
errmsg("error expanding argument list!");
if ( fileptr != F_UNSET ) {
altnm = filenm;
filenm = fileptr;
}
return YES;
}
void
editfile(void)
{
char *name; /* file to edit */
int newpc = F_UNSET;
if ((name = getarg()) && *name == '+') {
startcmd = name[1] ? 1+name : "$";
logit(("editfile: startcmd=%s",startcmd));
name = getarg();
}
if ( name ) {
logit((":edit %s", name));
if ((newpc = addarg(name)) == F_UNSET) {
errmsg(noalloc);
return;
}
#if LOOSELY_COMPATABLE
/* copy the rest of the files into the arglist
*/
while (name = getarg())
addarg(name);
#endif
}
else {
logit((":edit with no args: filenm=%d", filenm));
if ( filenm == F_UNSET ) {
errmsg("Nothing to edit");
return;
}
newpc = filenm;
}
if ( oktoedit(NO) )
doinput(newpc);
}
void
dotag(void)
{
char *tag;
Tag result;
int fileptr;
unless (oktoedit(autowrite))
return;
unless (tag = getarg()) {
errmsg("No tag");
return;
}
logit(("dotag: tag %s", tag));
unless ( find_tag(tag, strlen(tag), &result) ) {
errmsg("Can't find tag");
return;
}
logit(("dotag: filename=%s, pattern=%s", result.filename, result.pattern));
push_tag(filenm, curr);
clrmsg();
fileptr = addarg(result.filename);
if ( gototag(fileptr, result.pattern) == SAMEFILE )
fixupline(bseekeol(curr));
}
void
poptag(void)
{
Camefrom *loc = pop_tag();
unless (loc) {
errmsg("empty tag stack");
return;
}
if ( loc->fileno == filenm ) {
curr = loc->cursor;
redraw = YES;
return;
}
unless ( oktoedit(autowrite) )
return;
clrprompt();
inputf(args.gl_pathv[loc->fileno], YES);
curr = Min(loc->cursor, bufmax-1);
redraw = YES;
}
void
doinput(int fileptr)
{
inputf(args.gl_pathv[fileptr], YES);
if ( fileptr != filenm ) {
altnm = filenm;
filenm = fileptr;
}
}
void
toedit(int count)
{
if (count > 1) {
printi(count);
prints(" files to edit; ");
}
}
void
readfile(void)
{
char *name;
if ( *execstr == '!' ) {
int size=0;
FILE *f;
os_pid_t child;
if ( *++execstr ) {
if ( (f=os_cmdopen(execstr, NULL, &child)) ) {
insertfile(f, 1, curr, &size);
os_cmdclose(f, child);
}
}
else
errmsg("usage :r[ead] !cmd");
}
else if ( (name=getarg()) )
inputf(name,NO);
else
errmsg("no file to read");
}
void
nextfile(bool prev)
{
char *name = getarg();
int rc, i, current;
current = filenm;
if ( prev || (name && (strcmp(name, "-") == 0)) ) {
/* :n - ; move back, ignore other arguments
*/
if ( current <= 0 ) {
errmsg("(no prev files)");
return;
}
unless ( oktoedit(autowrite) )
return;
--current;
}
else if ( name == 0 ) {
/* :n w/o argument; move forward
*/
if ( current+1 >= args.gl_pathc ) {/* beware: gl_pathc is unsigned */
errmsg("(no more files)");
return;
}
unless ( oktoedit(autowrite) )
return;
current++;
}
else {
/* :n file {...}
*/
glob_t files;
unless (oktoedit(autowrite))
return;
fillchar(&files, sizeof files, 0);
do {
if (rc = os_glob(name, GLOB_APPEND|GLOB_NOMAGIC, &files)) {
errmsg(noalloc);
os_globfree(&files);
return;
}
} while ( name = getarg() );
if ( (files.gl_pathc == 1) && (i = findarg(files.gl_pathv[0])) >= 0) {
/* jump to existing file */
;
}
else {
/* toss the old args; s-l-o-w-l-y copy the new ones in */
os_globfree(&args);
for ( i=0; i < files.gl_pathc; i++ ) {
rc = os_glob(files.gl_pathv[i], GLOB_APPEND|GLOB_NOMAGIC, &args);
if ( rc ) {
errmsg(noalloc);
break;
}
}
current = 0;
}
if ( files.gl_pathc > 0 )
os_globfree(&files);
}
if ( current != F_UNSET )
doinput(current);
else {
/* if we got here and there was an error, we are screwed
* and need to go back to an empty screen
*/
newfile = YES;
}
}
/*
* set up low, high; set dot to high
*/
void
fixupline(int dft)
{
int newpos;
if (low < 0)
low = dft;
if (high < 0)
high = fseekeol(low);
else if (high < low) { /* flip high & low */
int tmp;
tmp = high;
high = low;
low = tmp;
}
newpos = (high<=0)?low:high;
//if (low >= ptop && low < pend) {
if (newpos >= ptop && newpos < pend) {
setpos(skipws(newpos));
yp = setY(curr);
}
else {
curr = newpos;
redraw = YES;
}
}
void
whatline(void)
{
printi(to_line((low < 0) ? (bufmax-1) : low));
if (high >= 0) {
printch(',');
printi(to_line(high));
}
}
void
print(void)
{
goto justwrite;
do {
exprintln();
justwrite:
writeline(-1, 0, low);
low = fseekeol(low) + 1;
} while (low < high);
exprintln();
}
/* move to different line */
/* execute lines from a :sourced || .lvrc file */
bool
do_file(char *fname,exec_type *mode)
{
char line[120];
FILE *fp;
if ((fp = expandfopen(fname,"r")) != NULL) {
++indirect;
while (fgets(line,120,fp) && indirect) {
strtok(line, "\n");
logit(("do_file: exec [%s]", line));
if (*line && exec(line,mode) )
break;
}
fclose(fp);
if ( indirect )
--indirect;
return YES;
}
return NO;
}
void
doins(bool flag)
{
int i;
curr = low;
exprintln();
low = insertion(1,setstep[flag],&i,&i,NO)-1;
if (low >= 0)
curr = low;
redraw = YES;
}
/* parse the command line for lineranges && a command */
static int
parse(char **inp, char *default_cmd)
{
int j,k;