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Almathera Ten Pack 2: CDPD 1
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Almathera Ten on Ten - Disc 2: CDPD 1.iso
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201-225
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217
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stevie
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cmdline.c
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C/C++ Source or Header
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1995-03-13
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15KB
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727 lines
/*
* STEVIE - Simply Try this Editor for VI Enthusiasts
*
* Code Contributions By : Tim Thompson twitch!tjt
* Tony Andrews onecom!wldrdg!tony
* G. R. (Fred) Walter watmath!watcgl!grwalter
*/
#include "stevie.h"
static char *altfile = NULL; /* alternate file */
static int altline; /* line # in alternate file */
static char *nowrtmsg = "No write since last change (use ! to override)";
extern char **files; /* used for "n" and "rew" */
extern int curfile;
extern int numfiles;
/*
* The next two variables contain the bounds of any range given in a command.
* If no range was given, both contain null line pointers. If only a single
* line was given, u_pos will contain a null line pointer.
*/
static LPtr l_pos, u_pos;
static bool_t interactive; /* TRUE if we're reading a real command line */
static bool_t doecmd();
static void
badcmd(), doshell(), get_range();
static LPtr *get_line();
#ifdef MEGAMAX
overlay "cmdline"
#endif
/*
* readcmdline() - accept a command line starting with ':', '/', or '?'
*
* readcmdline() accepts and processes colon commands and searches. If
* 'cmdline' is null, the command line is read here. Otherwise, cmdline
* points to a complete command line that should be used. This is used in
* main() to handle initialization commands in the environment variable
* "EXINIT".
*/
void
readcmdline(firstc, cmdline)
char firstc; /* either ':', '/', or '?' */
char *cmdline; /* optional command string */
{
char c;
char buff[CMDBUFFSIZE];
char cmdbuf[CMDBUFFSIZE];
char argbuf[CMDBUFFSIZE];
char *p, *q, *cmd, *arg;
bool_t literal_next_flag = FALSE;
/*
* Clear the range variables.
*/
l_pos.linep = (LINE *) NULL;
u_pos.linep = (LINE *) NULL;
interactive = (cmdline == NULL);
if (interactive)
gotocmdline(YES, firstc);
p = buff;
if (firstc != ':')
*p++ = firstc;
if (interactive) {
/* collect the command string, handling '\b' and @ */
for (;;) {
c = vgetc();
if (c == CTRL('V') && !literal_next_flag) {
literal_next_flag = TRUE;
outchar('^');
continue;
}
if (c == '\n' || ((c == '\r' || c == ESC) && (!literal_next_flag)))
break;
if ((c == '\b') && (!literal_next_flag)) {
if (p > buff + (firstc != ':')) {
p--;
/*
* this is gross, but it relies only on 'gotocmdline'
*/
gotocmdline(YES, firstc == ':' ? ':' : NUL);
for (q = buff; q < p; q++)
outstr(chars[*q].ch_str);
} else {
msg("");
return; /* back to cmd mode */
}
continue;
}
if ((c == '@') && (!literal_next_flag)) {
p = buff;
gotocmdline(YES, firstc);
continue;
}
if (literal_next_flag) {
literal_next_flag = FALSE;
outchar('\b');
}
outstr(chars[c].ch_str);
*p++ = c;
}
*p = '\0';
} else {
if (strlen(cmdline) > CMDBUFFSIZE - 2) /* should really do something
* better here... */
return;
strcpy(p, cmdline);
}
/* skip any initial white space */
for (cmd = buff; *cmd != NUL && isspace(*cmd); cmd++);
/* search commands */
c = *cmd;
if (c == '/' || c == '?') {
cmd++;
/* was the command was '//' or '??' (I.E. repeat last search) */
if ((*cmd == c) || (*cmd == NUL)) {
if (c == '/')
searchagain(FORWARD);
else
searchagain(BACKWARD);
return;
}
/* If there is a matching '/' or '?' at the end, toss it */
p = strchr(cmd, NUL);
if (*(p - 1) == c && *(p - 2) != '\\')
*(p - 1) = NUL;
dosearch((c == '/') ? FORWARD : BACKWARD, cmd);
return;
}
/*
* Parse a range, if present (and update the cmd pointer).
*/
get_range(&cmd);
if (l_pos.linep != NULL) {
if (LINEOF(&l_pos) > LINEOF(&u_pos)) {
emsg("Invalid range");
return;
}
}
strcpy(cmdbuf, cmd); /* save the unmodified command */
/* isolate the command and find any argument */
for (p = cmd; *p != NUL && !isspace(*p); p++);
if (*p == NUL)
arg = NULL;
else {
*p = NUL;
for (p++; *p != NUL && isspace(*p); p++);
if (*p == NUL) {
arg = NULL;
} else {
strcpy(argbuf, p);
arg = argbuf;
}
}
if (strcmp(cmd, "q!") == 0) {
getout(0);
}
if (strcmp(cmd, "q") == 0) {
if (Changed) {
emsg(nowrtmsg);
} else {
getout(0);
}
return;
}
if (strcmp(cmd, "w") == 0) {
if (arg == NULL) {
if (Filename != NULL) {
if (!writeit(Filename, &l_pos, &u_pos)) {
emsg("Problems occured while writing output file");
}
} else {
emsg("No output file");
}
} else {
(void) writeit(arg, &l_pos, &u_pos);
}
return;
}
if (strcmp(cmd, "wq") == 0) {
if (Filename != NULL) {
if (writeit(Filename, (LPtr *) NULL, (LPtr *) NULL)) {
getout(0);
}
} else {
emsg("No output file");
}
return;
}
if (strcmp(cmd, "x") == 0) {
if (Changed) {
if (Filename != NULL) {
if (!writeit(Filename, (LPtr *) NULL, (LPtr *) NULL)) {
emsg("Problems occured while writing output file");
return;
}
} else {
emsg("No output file");
return;
}
}
getout(0);
}
if (strcmp(cmd, "f") == 0 && arg == NULL) {
fileinfo();
return;
}
if (*cmd == 'n') {
if ((curfile + 1) < numfiles) {
/*
* stuff ":e[!] FILE\n"
*/
stuffReadbuff(":e");
if (cmd[1] == '!')
stuffReadbuff("!");
stuffReadbuff(" ");
stuffReadbuff(files[++curfile]);
stuffReadbuff("\n");
} else
emsg("No more files!");
return;
}
if (*cmd == 'p') {
if (curfile > 0) {
/*
* stuff ":e[!] FILE\n"
*/
stuffReadbuff(":e");
if (cmd[1] == '!')
stuffReadbuff("!");
stuffReadbuff(" ");
stuffReadbuff(files[--curfile]);
stuffReadbuff("\n");
} else
emsg("No more files!");
return;
}
if (strncmp(cmd, "rew", 3) == 0) {
if (numfiles <= 1) /* nothing to rewind */
return;
curfile = 0;
/*
* stuff ":e[!] FILE\n"
*/
stuffReadbuff(":e");
if (cmd[3] == '!')
stuffReadbuff("!");
stuffReadbuff(" ");
stuffReadbuff(files[0]);
stuffReadbuff("\n");
return;
}
if (strcmp(cmd, "e") == 0) {
if (Changed)
emsg(nowrtmsg);
else
(void) doecmd(arg);
return;
}
if (strcmp(cmd, "e!") == 0) {
(void) doecmd(arg);
return;
}
if (strcmp(cmd, "f") == 0) {
Filename = strsave(arg);
filemess("");
return;
}
if (strcmp(cmd, "r") == 0 || strcmp(cmd, ".r") == 0) {
if (arg == NULL) {
badcmd();
return;
}
if (readfile(arg, Curschar, 1)) {
emsg("Can't open file");
return;
}
CHANGED;
return;
}
if (strcmp(cmd, ".=") == 0) {
smsg("line %d", cntllines(Filemem, Curschar));
return;
}
if (strcmp(cmd, "$=") == 0) {
smsg("%d", cntllines(Filemem, Fileend) - 1);
return;
}
if (strncmp(cmd, "ta", 2) == 0) {
dotag(arg, cmd[2] == '!');
return;
}
if (strcmp(cmd, "set") == 0) {
doset(arg, interactive);
return;
}
if (strcmp(cmd, "help") == 0) {
if (help())
s_clear();
return;
}
if (strcmp(cmd, "version") == 0) {
extern char *Version;
msg(Version);
return;
}
if (strcmp(cmd, "sh") == 0) {
doshell();
return;
}
if (strncmp(cmd, "d", 1) == 0) {
LINE *cp;
int n;
if (l_pos.linep == NULL)
l_pos = *Curschar;
if (u_pos.linep == NULL)
u_pos = l_pos;
ResetBuffers();
n = RowNumber(&l_pos);
AppendPositionToUndoUndobuff(0, n);
AppendPositionToUndobuff(0, n);
if ((Filetop->linep->next == l_pos.linep) &&
(u_pos.linep->next == Fileend->linep))
AppendToUndobuff("a");
else if (u_pos.linep->next == Fileend->linep)
AppendToUndobuff("o");
else
AppendToUndobuff("O");
n = 0;
cp = l_pos.linep;
for (; cp != NULL && cp != Fileend->linep; cp = cp->next) {
AppendToUndobuff(cp->s);
n++;
if (cp == u_pos.linep)
break;
AppendToUndobuff(NL_STR);
}
AppendToUndobuff(ESC_STR);
if (n > 1)
AppendNumberToUndoUndobuff(n);
AppendToUndoUndobuff("dd");
*Curschar = l_pos;
delline(n);
S_NOT_VALID;
return;
}
if (strncmp(cmd, "s/", 2) == 0) {
dosub(&l_pos, &u_pos, cmdbuf + 1);
return;
}
if (strncmp(cmd, "g/", 2) == 0) {
doglob(&l_pos, &u_pos, cmdbuf + 1);
return;
}
/*
* If we got a line, but no command, then go to the line.
*/
if (*cmd == NUL && l_pos.linep != NULL) {
if (u_pos.linep != NULL)
*Curschar = u_pos;
else
*Curschar = l_pos;
S_CHECK_TOPCHAR_AND_BOTCHAR;
return;
}
badcmd();
}
/*
* get_range - parse a range specifier
*
* Ranges are of the form:
*
* addr[,addr]
*
* where 'addr' is:
*
* % (entire file)
* $ [+-NUM]
* 'x [+-NUM] (where x denotes a currently defined mark)
* . [+-NUM]
* NUM
*
* The pointer *cp is updated to point to the first character following the
* range spec. If an initial address is found, but no second, the upper bound
* is equal to the lower.
*/
static void
get_range(cp)
char **cp;
{
LPtr *l;
char *p;
if (**cp == '%') {
l_pos.index = 0;
l_pos.linep = Filetop->linep->next;
u_pos.index = 0;
u_pos.linep = Fileend->linep->prev;
(*cp)++;
return;
}
if ((l = get_line(cp)) == NULL)
return;
l_pos = *l;
for (p = *cp; *p != NUL && isspace(*p); p++);
*cp = p;
if (*p != ',') { /* is there another line spec ? */
u_pos = l_pos;
return;
}
*cp = ++p;
if ((l = get_line(cp)) == NULL) {
u_pos = l_pos;
return;
}
u_pos = *l;
}
static LPtr *
get_line(cp)
char **cp;
{
static LPtr pos;
LPtr *lp;
char *p, c;
int lnum;
pos.index = 0; /* shouldn't matter... check back later */
p = *cp;
/*
* Determine the basic form, if present.
*/
switch (c = *p++) {
case '$':
pos.linep = Fileend->linep->prev;
break;
case '.':
pos.linep = Curschar->linep;
break;
case '\'':
if ((lp = getmark(*p++)) == NULL) {
emsg("Unknown mark");
return (LPtr *) NULL;
}
pos = *lp;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
for (lnum = c - '0'; isdigit(*p); p++)
lnum = (lnum * 10) + (*p - '0');
if (lnum == 0)
lnum = 1;
pos = *gotoline(lnum);
break;
default:
return (LPtr *) NULL;
}
while (*p != NUL && isspace(*p))
p++;
if (*p == '-' || *p == '+') {
bool_t neg = (*p++ == '-');
for (lnum = 0; isdigit(*p); p++)
lnum = (lnum * 10) + (*p - '0');
if (neg)
lnum = -lnum;
pos = *gotoline(cntllines(Filemem, &pos) + lnum);
}
*cp = p;
return &pos;
}
static void
badcmd()
{
if (interactive)
emsg("Unrecognized command");
}
/*
* dotag(tag, force) - goto tag
*/
void
dotag(tag, force)
char *tag;
bool_t force;
{
FILE *tp, *fopen();
char lbuf[LSIZE];
char *fname, *str;
if ((tp = fopen("tags", "r")) == NULL) {
emsg("Can't open tags file");
return;
}
while (fgets(lbuf, LSIZE, tp) != NULL) {
if ((fname = strchr(lbuf, TAB)) == NULL) {
emsg("Format error in tags file");
return;
}
*fname++ = '\0';
if ((str = strchr(fname, TAB)) == NULL) {
emsg("Format error in tags file");
return;
}
*str++ = '\0';
if (strcmp(lbuf, tag) == 0) {
if (!force && Changed) {
emsg(nowrtmsg);
return;
}
if (doecmd(fname)) {
stuffReadbuff(str); /* str has \n at end */
stuffReadbuff("\007"); /* CTRL('G') */
fclose(tp);
return;
}
}
}
emsg("tag not found");
fclose(tp);
}
static bool_t
doecmd(arg)
char *arg;
{
int line = 1; /* line # to go to in new file */
if (arg != NULL) {
/*
* First detect a ":e" on the current file. This is mainly for ":ta"
* commands where the destination is within the current file.
*/
if (Filename != NULL) {
if (strcmp(arg, Filename) == 0) {
if (!Changed) {
return TRUE;
}
}
}
if (strcmp(arg, "#") == 0) { /* alternate */
char *s = Filename;
if (altfile == NULL) {
emsg("No alternate file");
return FALSE;
}
Filename = altfile;
altfile = s;
line = altline;
altline = cntllines(Filemem, Curschar);
} else {
altfile = Filename;
altline = cntllines(Filemem, Curschar);
Filename = strsave(arg);
}
}
if (Filename == NULL) {
emsg("No filename");
return FALSE;
}
/* clear mem and read file */
freeall();
filealloc();
UNCHANGED;
if (readfile(Filename, Filemem, 0)) {
emsg("Can't open file");
return FALSE;
}
*Topchar = *Curschar;
if (line != 1) {
stuffnumReadbuff(line);
stuffReadbuff("G");
}
setpcmark();
return TRUE;
}
static void
doshell()
{
char *sh, *getenv();
sh = getenv("SHELL");
if (sh == NULL) {
emsg("Shell variable not set");
return;
}
gotocmdline(YES, NUL);
if (system(sh) < 0) {
emsg("Exec failed");
return;
}
wait_return();
}
void
gotocmdline(clr, firstc)
bool_t clr;
char firstc;
{
windgoto(Rows - 1, 0);
if (clr)
outstr(T_EL); /* clear the bottom line */
if (firstc)
outchar(firstc);
}
/*
* msg(s) - displays the string 's' on the status line
*/
void
msg(s)
char *s;
{
gotocmdline(YES, NUL);
outstr(s);
#ifdef AMIGA
flushbuf();
#endif
#ifdef BSD
flushbuf();
#endif
}
/* VARARGS */
void
smsg(s, a1, a2, a3, a4, a5, a6, a7, a8, a9)
char *s;
int a1, a2, a3, a4, a5, a6, a7, a8, a9;
{
char sbuf[MAX_COLUMNS + 1];
sprintf(sbuf, s, a1, a2, a3, a4, a5, a6, a7, a8, a9);
msg(sbuf);
}
/*
* emsg() - display an error message
*
* Rings the bell, if appropriate, and calls message() to do the real work
*/
void
emsg(s)
char *s;
{
UndoInProgress = FALSE;
RedrawingDisabled = FALSE;
if (P(P_EB))
beep();
outstr(T_TI);
msg(s);
outstr(T_TP);
#ifdef AMIGA
flushbuf();
#endif
#ifdef BSD
flushbuf();
#endif
}
void
wait_return()
{
char c;
outstr("Press RETURN to continue");
do {
c = vgetc();
} while (c != '\r' && c != '\n');
s_clear();
}