Minix1.5/commands/elvis/cmd1.c
/* cmd1.c */
/* Author:
* Steve Kirkendall
* 16820 SW Tallac Way
* Beaverton, OR 97006
* kirkenda@jove.cs.pdx.edu, or ...uunet!tektronix!psueea!jove!kirkenda
*/
/* This file contains some of the EX commands - mostly ones that deal with
* files, options, etc. -- anything except text.
*/
#include <ctype.h>
#include "vi.h"
#include "regexp.h"
#ifdef DEBUG
/* print the selected lines with info on the blocks */
void cmd_debug(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
register char *scan;
register long l;
register int i;
int len;
/* scan lnum[] to determine which block its in */
l = markline(frommark);
for (i = 1; l > lnum[i]; i++)
{
}
do
{
/* fetch text of the block containing that line */
scan = blkget(i)->c;
/* calculate its length */
if (scan[BLKSIZE - 1])
{
len = BLKSIZE;
}
else
{
len = strlen(scan);
}
/* print block stats */
wprintw(stdscr, "##### hdr[%d]=%d, lnum[%d-1]=%ld, lnum[%d]=%ld (%ld lines)\n",
i, hdr.n[i], i, lnum[i-1], i, lnum[i], lnum[i] - lnum[i - 1]);
wprintw(stdscr, "##### len=%d, buf=0x%lx, %sdirty\n",
len, scan, ((int *)scan)[MAXBLKS + 1] ? "" : "not ");
if (bang)
{
while (--len >= 0)
{
addch(*scan);
scan++;
}
}
exrefresh();
/* next block */
i++;
} while (i < MAXBLKS && lnum[i] && lnum[i - 1] < markline(tomark));
}
/* This function checks a lot of conditions to make sure they aren't screwy */
void cmd_validate(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
char *scan;
ushort i;
int nlcnt; /* used to count newlines */
int len; /* counts non-NUL characters */
/* check lnum[0] */
if (lnum[0] != 0L)
{
wprintw(stdscr, "lnum[0] = %ld\n", lnum[0]);
}
/* check each block */
for (i = 1; lnum[i] <= nlines; i++)
{
scan = blkget(i)->c;
if (scan[BLKSIZE - 1])
{
wprintw(stdscr, "block %d has no NUL at the end\n", i);
}
else
{
for (nlcnt = len = 0; *scan; scan++, len++)
{
if (*scan == '\n')
{
nlcnt++;
}
}
if (scan[-1] != '\n')
{
wprintw(stdscr, "block %d doesn't end with '\\n' (length %d)\n", i, len);
}
if (bang || nlcnt != lnum[i] - lnum[i - 1])
{
wprintw(stdscr, "block %d (line %ld?) has %d lines, but should have %ld\n",
i, lnum[i - 1] + 1L, nlcnt, lnum[i] - lnum[i - 1]);
}
}
exrefresh();
}
/* check lnum again */
if (lnum[i] != INFINITY)
{
wprintw(stdscr, "hdr.n[%d] = %d, but lnum[%d] = %ld\n",
i, hdr.n[i], i, lnum[i]);
}
wprintw(stdscr, "# = \"%s\", %% = \"%s\"\n", prevorig, origname);
}
#endif /* DEBUG */
void cmd_mark(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
/* validate the name of the mark */
if (!extra || *extra < 'a' || *extra > 'z' || extra[1])
{
msg("Invalid mark name");
return;
}
mark[*extra - 'a'] = tomark;
}
void cmd_write(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
int fd;
register long l;
register char *scan;
register int i;
/* if all lines are to be written, use tmpsave() */
if (frommark == MARK_FIRST && tomark == MARK_LAST)
{
tmpsave(extra);
return;
}
/* else do it line-by-line, like cmd_print() */
fd = open((*extra == '>' ? extra + 2 : extra), 1);
if (fd < 0)
{
fd = creat(extra, 0644);
if (fd < 0)
{
msg("Can't write to \"%s\"", extra);
return;
}
}
else if (*extra == '>')
{
lseek(fd, 0L, 2);
}
for (l = markline(frommark); l <= markline(tomark); l++)
{
/* get the next line */
scan = fetchline(l);
i = strlen(scan);
scan[i++] = '\n';
/* print the line */
write(fd, scan, i);
}
close(fd);
}
void cmd_shell(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
static char prevextra[80];
/* special case: ":sh" means ":!sh" */
if (cmd == CMD_SHELL)
{
extra = o_shell;
frommark = tomark = 0L;
}
/* if extra is "!", substute previous command */
if (*extra == '!')
{
if (!*prevextra)
{
addstr("No previous shell command to substitute for '!'\n");
return;
}
extra = prevextra;
}
else
{
strcpy(prevextra, extra);
}
/* if no lines were specified, just run the command */
suspend_curses();
if (frommark == 0L)
{
system(extra);
}
else /* pipe lines from the file through the command */
{
filter(frommark, tomark, extra);
}
/* resume curses quietly for MODE_EX, but noisily otherwise */
resume_curses(mode == MODE_EX);
}
void cmd_global(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra; /* rest of the command line */
{
char *cmdptr; /* the command from the command line */
char cmdln[100]; /* copy of the command from the command line */
char *line; /* a line from the file */
long l; /* used as a counter to move through lines */
long lqty; /* quantity of lines to be scanned */
regexp *re; /* the compiled search expression */
/* ":g! ..." is the same as ":v ..." */
if (bang)
{
cmd = CMD_VGLOBAL;
}
/* make sure we got a search pattern */
if (*extra != '/' && *extra != '?')
{
msg("Usage: %c /regular expression/ command", cmd == CMD_GLOBAL ? 'g' : 'v');
return;
}
/* parse & compile the search pattern */
cmdptr = parseptrn(extra);
if (!extra[1])
{
msg("Can't use empty regular expression with '%c' command", cmd == CMD_GLOBAL ? 'g' : 'v');
return;
}
re = regcomp(extra + 1);
if (!re)
{
/* regcomp found & described an error */
return;
}
/* for each line in the range */
ChangeText
{
/* NOTE: we have to go through the lines in a forward order,
* otherwise "g/re/p" would look funny. *BUT* for "g/re/d"
* to work, simply adding 1 to the line# on each loop won't
* work. The solution: count lines relative to the end of
* the file. Think about it.
*/
for (l = nlines - markline(frommark), lqty = markline(tomark) - markline(frommark) + 1L;
lqty > 0 && nlines - l >= 0;
l--, lqty--)
{
/* fetch the line */
line = fetchline(nlines - l);
/* if it contains the search pattern... */
if ((!regexec(re, line, 1)) == (cmd != CMD_GLOBAL))
{
/* move the cursor to that line */
cursor = MARK_AT_LINE(nlines - l);
/* do the ex command (without mucking up
* the original copy of the command line)
*/
strcpy(cmdln, cmdptr);
doexcmd(cmdln);
}
}
}
/* free the regexp */
free(re);
}
void cmd_file(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
if (frommark == tomark)
{
msg( "\"%s\" %s%s %ld lines, this is line %ld [%ld%%]",
*origname ? origname : "[NO FILE]",
tstflag(file, MODIFIED) ? "[MODIFIED]" : "",
tstflag(file, READONLY) ? "[READONLY]" : "",
nlines,
markline(frommark),
markline(frommark) * 100 / nlines);
}
else
{
msg( "\"%s\" %s%s %ld lines, range %ld,%ld contains %ld lines",
*origname ? origname : "[NO FILE]",
tstflag(file, MODIFIED) ? "[MODIFIED]" : "",
tstflag(file, READONLY) ? "[READONLY]" : "",
nlines,
markline(frommark), markline(tomark),
markline(tomark) - markline(frommark) + 1L);
}
}
void cmd_edit(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
long line = 1L; /* might be set to prevline */
if (!strcmp(extra, prevorig))
{
line = prevline;
}
/* switch files */
if (tmpabort(bang))
{
tmpstart(extra);
if (line <= nlines && line >= 1L)
{
cursor = MARK_AT_LINE(line);
}
}
else
{
addstr("Use edit! to abort changes, or w to save changes\n");
/* so we can say ":e!" with no filename next time... */
strcpy(prevorig, extra);
prevline = 1L;
}
}
void cmd_next(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
int i, j;
char *scan;
char *build;
/* if extra stuff given, use ":args" to define a new args list */
if (extra && *extra)
{
cmd_args(frommark, tomark, cmd, bang, extra);
}
/* move to the next arg */
if (cmd == CMD_NEXT)
{
i = argno + 1;
}
else
{
i = argno - 1;
}
if (i < 0 || i >= nargs)
{
msg("No more files to edit");
return;
}
/* find & isolate the name of the file to edit */
for (j = i, scan = args; j > 0; j--)
{
while(!isspace(*scan))
{
scan++;
}
while(isspace(*scan))
{
scan++;
}
}
for (build = tmpblk.c; *scan && !isspace(*scan); )
{
*build++ = *scan++;
}
*build = '\0';
/* switch to the next file */
if (tmpabort(bang))
{
tmpstart(tmpblk.c);
argno = i;
}
else
{
addstr("Use next! to abort changes, or w to save changes\n");
}
}
void cmd_xit(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
static long whenwarned; /* when the user was last warned of extra files */
/* if there are more files to edit, then warn user */
if (argno + 1 < nargs && whenwarned != changes)
{
msg("More files to edit -- Use \":n\" to go to next file");
whenwarned = changes;
return;
}
/* else try to save this file */
if (tmpend(bang))
{
mode = MODE_QUIT;
}
else
{
msg("Could not save file -- use quit! to abort changes, or w filename");
}
}
void cmd_args(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
char *scan;
int i;
int spc; /* boolean: was previous char a space? */
/* if no extra names given, or just current name, then report the args
* we have now.
*/
if (!extra || !*extra)
{
/* for each element of args... */
for (scan = args, spc = TRUE, i = 0; *scan; )
{
/* bracket before the current arg */
if (*scan != ' ' && *scan != '\t' && spc && i == argno)
{
qaddch('[');
}
qaddch(*scan);
spc = (*scan == ' ' || *scan == '\t');
scan++;
/* bracket after current arg */
if ((!*scan || *scan == ' ' || *scan == '\t') && !spc)
{
if (i == argno)
{
qaddch(']');
}
i++;
}
}
/* write a trailing newline */
addch('\n');
exrefresh();
}
else /* new args list given */
{
strcpy(args, extra);
argno = -1; /* before the first, so :next wil go to first */
/* count the names */
for (nargs = 0, scan = args; *scan; nargs++)
{
while (*scan && !isspace(*scan))
{
scan++;
}
while (isspace(*scan))
{
scan++;
}
}
msg("%d files to edit", nargs);
exrefresh();
}
}
void cmd_cd(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
char *getenv();
/* default directory name is $HOME */
if (!*extra)
{
extra = getenv("HOME");
if (!extra)
{
msg("environment variable $HOME not set");
return;
}
}
/* go to the directory */
if (chdir(extra) < 0)
{
perror(extra);
}
}
void cmd_map(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
char *mapto;
/* "map" with no extra will dump the map table contents */
if (!*extra)
{
dumpkey();
}
else
{
/* "extra" is key to map, followed my what it maps to */
for (mapto = extra; *mapto && *mapto != ' ' && *mapto!= '\t'; mapto++)
{
}
while (*mapto == ' ' || *mapto == '\t')
{
*mapto++ = '\0';
}
mapkey(extra, mapto, bang ? WHEN_VICMD|WHEN_VIINP|WHEN_EX : WHEN_VICMD, (char *)0);
}
}
void cmd_set(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
if (!*extra)
{
dumpopts(FALSE);/* "FALSE" means "don't dump all" - only set */
}
else if (!strcmp(extra, "all"))
{
dumpopts(TRUE); /* "TRUE" means "dump all" - even unset vars */
}
else
{
setopts(extra);
}
}
void cmd_tag(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
char *scan; /* used to scan through the tmpblk.c */
char *cmp; /* char of tag name we're comparing, or NULL */
char *end; /* marks the end of chars in tmpblk.c */
int fd; /* file descriptor used to read the file */
char wasmagic; /* preserves the original state of o_magic */
/* open the tags file */
fd = open(TAGS, O_RDONLY);
if (fd < 0)
{
msg("No tags file");
return;
}
/* Hmmm... this would have been a lot easier with <stdio.h> */
/* find the line with our tag in it */
for(scan = end = tmpblk.c, cmp = extra; ; scan++)
{
/* read a block, if necessary */
if (scan >= end)
{
end = tmpblk.c + read(fd, tmpblk.c, BLKSIZE);
scan = tmpblk.c;
if (scan >= end)
{
msg("tag \"%s\" not found", extra);
close(fd);
return;
}
}
/* if we're comparing, compare... */
if (cmp)
{
/* matched??? wow! */
if (!*cmp && *scan == '\t')
{
break;
}
if (*cmp++ != *scan)
{
/* failed! skip to newline */
cmp = (char *)0;
}
}
/* if we're skipping to newline, do it fast! */
if (!cmp)
{
while (scan < end && *scan != '\n')
{
scan++;
}
if (scan < end)
{
cmp = extra;
}
}
}
/* found it! get the rest of the line into memory */
for (cmp = tmpblk.c, scan++; scan < end && *scan != '\n'; )
{
*cmp++ = *scan++;
}
if (scan == end)
{
read(fd, cmp, BLKSIZE - (cmp - tmpblk.c));
}
/* we can close the tags file now */
close(fd);
/* extract the filename from the line, and edit the file */
for (cmp = tmpblk.c; *cmp != '\t'; cmp++)
{
}
*cmp++ = '\0';
if (strcmp(origname, tmpblk.c) != 0)
{
if (!tmpabort(bang))
{
addstr("Use tag! to abort changes, or w to save changes\n");
return;
}
tmpstart(tmpblk.c);
}
/* move to the desired line (or to line 1 if that fails) */
wasmagic = *o_magic;
*o_magic = FALSE;
linespec(cmp, &cursor);
if (cursor == MARK_UNSET)
{
cursor = MARK_FIRST;
}
*o_magic = wasmagic;
}
void cmd_visual(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
mode = MODE_VI;
}
void cmd_quit(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
if (tmpabort(bang))
{
mode = MODE_QUIT;
}
else
{
addstr("Use q! to abort changes, or wq to save changes\n");
}
}
void cmd_rewind(frommark, tomark, cmd, bang, extra)
MARK frommark, tomark;
CMD cmd;
int bang;
char *extra;
{
/* switch to the first file */
if (tmpabort(bang))
{
argno = -1;
cmd_next(frommark, tomark, CMD_NEXT, bang, extra);
}
else
{
addstr("Use rewind! to abort changes, or w to save changes\n");
}
}
/* describe this version of the program */
void cmd_version(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
#ifndef DATE
addstr(VERSION);
addch('\n');
#else
wprintw(stdscr, "%s (%s)\n", VERSION, DATE);
#endif
#ifdef COPYING
addch('\n');
addstr(COPYING);
addch('\n');
#endif
}
/* make a .exrc file which describes the current configuration */
void cmd_mkexrc(frommark, tomark, cmd, bang, extra)
MARK frommark;
MARK tomark;
CMD cmd;
int bang;
char *extra;
{
int fd;
/* create the .exrc file */
fd = creat(EXRC, 0666);
if (fd < 0)
{
addstr("Couldn't create .exrc file\n");
return;
}
/* save stuff */
savekeys(fd);
saveopts(fd);
/* close the file */
close(fd);
addstr("Created new .exrc file\n");
}