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phunix/commands/elvis/cmd2.c
Ben Gras 9865aeaa79 Initial revision
2005-04-21 14:53:53 +00:00

943 lines
17 KiB
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Executable File
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/* cmd2.c */
/* Author:
* Steve Kirkendall
* 14407 SW Teal Blvd. #C
* Beaverton, OR 97005
* kirkenda@cs.pdx.edu
*/
/* This file contains some of the commands - mostly ones that change text */
#include "config.h"
#include "ctype.h"
#include "vi.h"
#include "regexp.h"
#if TOS
# include <stat.h>
#else
# if OSK
# include "osk.h"
# else
# if AMIGA
# include "amistat.h"
# else
# include <sys/stat.h>
# endif
# endif
#endif
/*ARGSUSED*/
void cmd_substitute(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra; /* rest of the command line */
{
char *line; /* a line from the file */
regexp *re; /* the compiled search expression */
char *subst; /* the substitution string */
char *opt; /* substitution options */
long l; /* a line number */
char *s, *d; /* used during subtitutions */
char *conf; /* used during confirmation */
long chline; /* # of lines changed */
long chsub; /* # of substitutions made */
static optp; /* boolean option: print when done? */
static optg; /* boolean option: substitute globally in line? */
static optc; /* boolean option: confirm before subst? */
#ifndef CRUNCH
long oldnlines;
#endif
/* for now, assume this will fail */
rptlines = -1L;
if (cmd == CMD_SUBAGAIN)
{
#ifndef NO_MAGIC
if (*o_magic)
subst = "~";
else
#endif
subst = "\\~";
re = regcomp("");
/* if visual "&", then turn off the "p" and "c" options */
if (bang)
{
optp = optc = FALSE;
}
}
else /* CMD_SUBSTITUTE */
{
/* make sure we got a search pattern */
if (*extra != '/' && *extra != '?')
{
msg("Usage: s/regular expression/new text/");
return;
}
/* parse & compile the search pattern */
subst = parseptrn(extra);
re = regcomp(extra + 1);
}
/* abort if RE error -- error message already given by regcomp() */
if (!re)
{
return;
}
if (cmd == CMD_SUBSTITUTE)
{
/* parse the substitution string & find the option string */
for (opt = subst; *opt && *opt != *extra; opt++)
{
if (*opt == '\\' && opt[1])
{
opt++;
}
}
if (*opt)
{
*opt++ = '\0';
}
/* analyse the option string */
if (!*o_edcompatible)
{
optp = optg = optc = FALSE;
}
while (*opt)
{
switch (*opt++)
{
case 'p': optp = !optp; break;
case 'g': optg = !optg; break;
case 'c': optc = !optc; break;
case ' ':
case '\t': break;
default:
msg("Subst options are p, c, and g -- not %c", opt[-1]);
return;
}
}
}
/* if "c" or "p" flag was given, and we're in visual mode, then NEWLINE */
if ((optc || optp) && mode == MODE_VI)
{
addch('\n');
exrefresh();
}
ChangeText
{
/* reset the change counters */
chline = chsub = 0L;
/* for each selected line */
for (l = markline(frommark); l <= markline(tomark); l++)
{
/* fetch the line */
line = fetchline(l);
/* if it contains the search pattern... */
if (regexec(re, line, TRUE))
{
/* increment the line change counter */
chline++;
/* initialize the pointers */
s = line;
d = tmpblk.c;
/* do once or globally ... */
do
{
#ifndef CRUNCH
/* confirm, if necessary */
if (optc)
{
for (conf = line; conf < re->startp[0]; conf++)
addch(*conf);
standout();
for ( ; conf < re->endp[0]; conf++)
addch(*conf);
standend();
for (; *conf; conf++)
addch(*conf);
addch('\n');
exrefresh();
if (getkey(0) != 'y')
{
/* copy accross the original chars */
while (s < re->endp[0])
*d++ = *s++;
/* skip to next match on this line, if any */
goto Continue;
}
}
#endif /* not CRUNCH */
/* increment the substitution change counter */
chsub++;
/* copy stuff from before the match */
while (s < re->startp[0])
{
*d++ = *s++;
}
/* substitute for the matched part */
regsub(re, subst, d);
s = re->endp[0];
d += strlen(d);
Continue:
/* if this regexp could conceivably match
* a zero-length string, then require at
* least 1 unmatched character between
* matches.
*/
if (re->minlen == 0)
{
if (!*s)
break;
*d++ = *s++;
}
} while (optg && regexec(re, s, FALSE));
/* copy stuff from after the match */
while (*d++ = *s++) /* yes, ASSIGNMENT! */
{
}
#ifndef CRUNCH
/* NOTE: since the substitution text is allowed to have ^Ms which are
* translated into newlines, it is possible that the number of lines
* in the file will increase after each line has been substituted.
* we need to adjust for this.
*/
oldnlines = nlines;
#endif
/* replace the old version of the line with the new */
d[-1] = '\n';
d[0] = '\0';
change(MARK_AT_LINE(l), MARK_AT_LINE(l + 1), tmpblk.c);
#ifndef CRUNCH
l += nlines - oldnlines;
tomark += MARK_AT_LINE(nlines - oldnlines);
#endif
/* if supposed to print it, do so */
if (optp)
{
addstr(tmpblk.c);
exrefresh();
}
/* move the cursor to that line */
cursor = MARK_AT_LINE(l);
}
}
}
/* free the regexp */
free(re);
/* if done from within a ":g" command, then finish silently */
if (doingglobal)
{
rptlines = chline;
rptlabel = "changed";
return;
}
/* Reporting */
if (chsub == 0)
{
msg("Substitution failed");
}
else if (chline >= *o_report)
{
msg("%ld substitutions on %ld lines", chsub, chline);
}
rptlines = 0L;
}
/*ARGSUSED*/
void cmd_delete(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
MARK curs2; /* an altered form of the cursor */
/* choose your cut buffer */
if (*extra == '"')
{
extra++;
}
if (*extra)
{
cutname(*extra);
}
/* make sure we're talking about whole lines here */
frommark = frommark & ~(BLKSIZE - 1);
tomark = (tomark & ~(BLKSIZE - 1)) + BLKSIZE;
/* yank the lines */
cut(frommark, tomark);
/* if CMD_DELETE then delete the lines */
if (cmd != CMD_YANK)
{
curs2 = cursor;
ChangeText
{
/* delete the lines */
delete(frommark, tomark);
}
if (curs2 > tomark)
{
cursor = curs2 - tomark + frommark;
}
else if (curs2 > frommark)
{
cursor = frommark;
}
}
}
/*ARGSUSED*/
void cmd_append(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
long l; /* line counter */
#ifndef CRUNCH
/* if '!' then toggle auto-indent */
if (bang)
{
*o_autoindent = !*o_autoindent;
}
#endif
ChangeText
{
/* if we're doing a change, delete the old version */
if (cmd == CMD_CHANGE)
{
/* delete 'em */
cmd_delete(frommark, tomark, cmd, bang, extra);
}
/* new lines start at the frommark line, or after it */
l = markline(frommark);
if (cmd == CMD_APPEND)
{
l++;
}
/* get lines until no more lines, or "." line, and insert them */
while (vgets('\0', tmpblk.c, BLKSIZE) >= 0)
{
addch('\n');
if (!strcmp(tmpblk.c, "."))
{
break;
}
strcat(tmpblk.c, "\n");
add(MARK_AT_LINE(l), tmpblk.c);
l++;
}
}
/* on the odd chance that we're calling this from vi mode ... */
redraw(MARK_UNSET, FALSE);
}
/*ARGSUSED*/
void cmd_put(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
/* choose your cut buffer */
if (*extra == '"')
{
extra++;
}
if (*extra)
{
cutname(*extra);
}
/* paste it */
ChangeText
{
cursor = paste(frommark, TRUE, FALSE);
}
}
/*ARGSUSED*/
void cmd_join(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
long l;
char *scan;
int len; /* length of the new line */
/* if only one line is specified, assume the following one joins too */
if (markline(frommark) == nlines)
{
msg("Nothing to join with this line");
return;
}
if (markline(frommark) == markline(tomark))
{
tomark += BLKSIZE;
}
/* get the first line */
l = markline(frommark);
strcpy(tmpblk.c, fetchline(l));
len = strlen(tmpblk.c);
/* build the longer line */
while (++l <= markline(tomark))
{
/* get the next line */
scan = fetchline(l);
/* remove any leading whitespace */
while (*scan == '\t' || *scan == ' ')
{
scan++;
}
/* see if the line will fit */
if (strlen(scan) + len + 3 > BLKSIZE)
{
msg("Can't join -- the resulting line would be too long");
return;
}
/* catenate it, with a space (or two) in between */
if (!bang)
{
if (len >= 1)
{
if (tmpblk.c[len - 1] == '.'
|| tmpblk.c[len - 1] == '?'
|| tmpblk.c[len - 1] == '!')
{
tmpblk.c[len++] = ' ';
}
tmpblk.c[len++] = ' ';
}
}
strcpy(tmpblk.c + len, scan);
len += strlen(scan);
}
tmpblk.c[len++] = '\n';
tmpblk.c[len] = '\0';
/* make the change */
ChangeText
{
frommark &= ~(BLKSIZE - 1);
tomark &= ~(BLKSIZE - 1);
tomark += BLKSIZE;
change(frommark, tomark, tmpblk.c);
}
/* Reporting... */
rptlines = markline(tomark) - markline(frommark) - 1L;
rptlabel = "joined";
}
/*ARGSUSED*/
void cmd_shift(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
long l; /* line number counter */
int oldidx; /* number of chars previously used for indent */
int newidx; /* number of chars in the new indent string */
int oldcol; /* previous indent amount */
int newcol; /* new indent amount */
char *text; /* pointer to the old line's text */
ChangeText
{
/* for each line to shift... */
for (l = markline(frommark); l <= markline(tomark); l++)
{
/* get the line - ignore empty lines unless ! mode */
text = fetchline(l);
if (!*text && !bang)
continue;
/* calc oldidx and oldcol */
for (oldidx = 0, oldcol = 0;
text[oldidx] == ' ' || text[oldidx] == '\t';
oldidx++)
{
if (text[oldidx] == ' ')
{
oldcol += 1;
}
else
{
oldcol += *o_tabstop - (oldcol % *o_tabstop);
}
}
/* calc newcol */
if (cmd == CMD_SHIFTR)
{
newcol = oldcol + (*o_shiftwidth & 0xff);
}
else
{
newcol = oldcol - (*o_shiftwidth & 0xff);
if (newcol < 0)
newcol = 0;
}
/* if no change, then skip to next line */
if (oldcol == newcol)
continue;
/* build a new indent string */
newidx = 0;
if (*o_autotab)
{
while (newcol >= *o_tabstop)
{
tmpblk.c[newidx++] = '\t';
newcol -= *o_tabstop;
}
}
while (newcol > 0)
{
tmpblk.c[newidx++] = ' ';
newcol--;
}
tmpblk.c[newidx] = '\0';
/* change the old indent string into the new */
change(MARK_AT_LINE(l), MARK_AT_LINE(l) + oldidx, tmpblk.c);
}
}
/* Reporting... */
rptlines = markline(tomark) - markline(frommark) + 1L;
if (cmd == CMD_SHIFTR)
{
rptlabel = ">ed";
}
else
{
rptlabel = "<ed";
}
}
/*ARGSUSED*/
void cmd_read(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
int fd, rc; /* used while reading from the file */
char *scan; /* used for finding NUL characters */
int hadnul; /* boolean: any NULs found? */
int addnl; /* boolean: forced to add newlines? */
int len; /* number of chars in current line */
long lines; /* number of lines in current block */
struct stat statb;
/* special case: if ":r !cmd" then let the filter() function do it */
if (extra[0] == '!')
{
filter(frommark, MARK_UNSET, extra + 1, TRUE);
return;
}
/* open the file */
fd = open(extra, O_RDONLY);
if (fd < 0)
{
msg("Can't open \"%s\"", extra);
return;
}
#ifndef CRUNCH
if (stat(extra, &statb) < 0)
{
msg("Can't stat \"%s\"", extra);
}
# if TOS
if (statb.st_mode & S_IJDIR)
# else
# if OSK
if (statb.st_mode & S_IFDIR)
# else
if ((statb.st_mode & S_IFMT) != S_IFREG)
# endif
# endif
{
msg("\"%s\" is not a regular file", extra);
return;
}
#endif /* not CRUNCH */
/* get blocks from the file, and add them */
ChangeText
{
/* insertion starts at the line following frommark */
tomark = frommark = (frommark | (BLKSIZE - 1L)) + 1L;
len = 0;
hadnul = addnl = FALSE;
/* add an extra newline, so partial lines at the end of
* the file don't trip us up
*/
add(tomark, "\n");
/* for each chunk of text... */
while ((rc = tread(fd, tmpblk.c, BLKSIZE - 1)) > 0)
{
/* count newlines, convert NULs, etc. ... */
for (lines = 0, scan = tmpblk.c; rc > 0; rc--, scan++)
{
/* break up long lines */
if (*scan != '\n' && len + 2 > BLKSIZE)
{
*scan = '\n';
addnl = TRUE;
}
/* protect against NUL chars in file */
if (!*scan)
{
*scan = 0x80;
hadnul = TRUE;
}
/* starting a new line? */
if (*scan == '\n')
{
/* reset length at newline */
len = 0;
lines++;
}
else
{
len++;
}
}
/* add the text */
*scan = '\0';
add(tomark, tmpblk.c);
tomark += MARK_AT_LINE(lines) + len - markidx(tomark);
}
/* if partial last line, then retain that first newline */
if (len > 0)
{
msg("Last line had no newline");
tomark += BLKSIZE; /* <- for the rptlines calc */
}
else /* delete that first newline */
{
delete(tomark, (tomark | (BLKSIZE - 1L)) + 1L);
}
}
/* close the file */
close(fd);
/* Reporting... */
rptlines = markline(tomark) - markline(frommark);
rptlabel = "read";
if (mode == MODE_EX)
{
cursor = (tomark & ~BLKSIZE) - BLKSIZE;
}
else
{
cursor = frommark;
}
if (addnl)
msg("Newlines were added to break up long lines");
if (hadnul)
msg("NULs were converted to 0x80");
}
/*ARGSUSED*/
void cmd_undo(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
undo();
}
/* print the selected lines */
/*ARGSUSED*/
void cmd_print(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
REG char *scan;
REG long l;
REG int col;
for (l = markline(frommark); l <= markline(tomark); l++)
{
/* display a line number, if CMD_NUMBER */
if (cmd == CMD_NUMBER)
{
sprintf(tmpblk.c, "%6ld ", l);
qaddstr(tmpblk.c);
col = 8;
}
else
{
col = 0;
}
/* get the next line & display it */
for (scan = fetchline(l); *scan; scan++)
{
/* expand tabs to the proper width */
if (*scan == '\t' && cmd != CMD_LIST)
{
do
{
qaddch(' ');
col++;
} while (col % *o_tabstop != 0);
}
else if (*scan > 0 && *scan < ' ' || *scan == '\177')
{
qaddch('^');
qaddch(*scan ^ 0x40);
col += 2;
}
else if ((*scan & 0x80) && cmd == CMD_LIST)
{
sprintf(tmpblk.c, "\\%03o", UCHAR(*scan));
qaddstr(tmpblk.c);
col += 4;
}
else
{
qaddch(*scan);
col++;
}
/* wrap at the edge of the screen */
if (!has_AM && col >= COLS)
{
addch('\n');
col -= COLS;
}
}
if (cmd == CMD_LIST)
{
qaddch('$');
}
addch('\n');
exrefresh();
}
}
/* move or copy selected lines */
/*ARGSUSED*/
void cmd_move(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
MARK destmark;
/* parse the destination linespec. No defaults. Line 0 is okay */
destmark = cursor;
if (!strcmp(extra, "0"))
{
destmark = 0L;
}
else if (linespec(extra, &destmark) == extra || !destmark)
{
msg("invalid destination address");
return;
}
/* flesh the marks out to encompass whole lines */
frommark &= ~(BLKSIZE - 1);
tomark = (tomark & ~(BLKSIZE - 1)) + BLKSIZE;
destmark = (destmark & ~(BLKSIZE - 1)) + BLKSIZE;
/* make sure the destination is valid */
if (cmd == CMD_MOVE && destmark >= frommark && destmark < tomark)
{
msg("invalid destination address");
}
/* Do it */
ChangeText
{
/* save the text to a cut buffer */
cutname('\0');
cut(frommark, tomark);
/* if we're not copying, delete the old text & adjust destmark */
if (cmd != CMD_COPY)
{
delete(frommark, tomark);
if (destmark >= frommark)
{
destmark -= (tomark - frommark);
}
}
/* add the new text */
paste(destmark, FALSE, FALSE);
}
/* move the cursor to the last line of the moved text */
cursor = destmark + (tomark - frommark) - BLKSIZE;
if (cursor < MARK_FIRST || cursor >= MARK_LAST + BLKSIZE)
{
cursor = MARK_LAST;
}
/* Reporting... */
rptlabel = ( (cmd == CMD_COPY) ? "copied" : "moved" );
}
/* execute EX commands from a file */
/*ARGSUSED*/
void cmd_source(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
/* must have a filename */
if (!*extra)
{
msg("\"source\" requires a filename");
return;
}
doexrc(extra);
}
#ifndef NO_AT
/*ARGSUSED*/
void cmd_at(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
static nest = FALSE;
int result;
char buf[MAXRCLEN];
/* don't allow nested macros */
if (nest)
{
msg("@ macros can't be nested");
return;
}
nest = TRUE;
/* require a buffer name */
if (*extra == '"')
extra++;
if (!*extra || !isascii(*extra) ||!islower(*extra))
{
msg("@ requires a cut buffer name (a-z)");
}
/* get the contents of the buffer */
result = cb2str(*extra, buf, (unsigned)(sizeof buf));
if (result <= 0)
{
msg("buffer \"%c is empty", *extra);
}
else if (result >= sizeof buf)
{
msg("buffer \"%c is too large to execute", *extra);
}
else
{
/* execute the contents of the buffer as ex commands */
exstring(buf, result, '\\');
}
nest = FALSE;
}
#endif
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