xenocara/app/cwm/parse.y
simon 0141485332 Replace the symlink configuration scheme with a simple yacc parser as
found in other places of the tree.  Remove sticky and font commandline
options and add another one for alternative config locations.
Split off cwmrc(5) from cwm(1), nuke #ifdef __OpenBSD__ while there.

tested by various kind people, feedback from oga@ and okan@ - thanks!
ok oga@, jasper@, okan@
2008-03-23 15:09:21 +00:00

584 lines
12 KiB
Plaintext

/* $OpenBSD: parse.y,v 1.1 2008/03/23 15:09:21 simon Exp $ */
/*
* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2001 Markus Friedl. All rights reserved.
* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
* Copyright (c) 2001 Theo de Raadt. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
%{
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "headers.h"
#include "calmwm.h"
TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
static struct file {
TAILQ_ENTRY(file) entry;
FILE *stream;
char *name;
int lineno;
int errors;
} *file;
struct file *pushfile(const char *);
int popfile(void);
int yyparse(void);
int yylex(void);
int yyerror(const char *, ...);
int kw_cmp(const void *, const void *);
int lookup(char *);
int lgetc(int);
int lungetc(int);
int findeol(void);
static struct conf *conf;
extern char *shortcut_to_name[];
typedef struct {
union {
int64_t number;
char *string;
} v;
int lineno;
} YYSTYPE;
%}
%token FONTNAME STICKY
%token AUTOGROUP BIND COMMAND IGNORE
%token YES NO
%token ERROR
%token <v.string> STRING
%token <v.number> NUMBER
%type <v.number> yesno
%type <v.string> string
%%
grammar : /* empty */
| grammar '\n'
| grammar main '\n'
| grammar error '\n' { file->errors++; }
;
string : string STRING {
if (asprintf(&$$, "%s %s", $1, $2) == -1) {
free($1);
free($2);
yyerror("string: asprintf");
YYERROR;
}
free($1);
free($2);
}
| STRING
;
yesno : YES { $$ = 1; }
| NO { $$ = 0; }
;
main : FONTNAME STRING {
if (conf->DefaultFontName != NULL &&
conf->DefaultFontName != DEFAULTFONTNAME)
free(conf->DefaultFontName);
if ((conf->DefaultFontName = xstrdup($2)) == NULL) {
free($2);
yyerror("string: asprintf");
YYERROR;
}
free($2);
}
| STICKY yesno {
if ($2 == 0)
conf->flags &= ~CONF_STICKY_GROUPS;
else
conf->flags |= CONF_STICKY_GROUPS;
}
| COMMAND STRING string {
conf_cmd_add(conf, $3, $2, 0);
free($2);
free($3);
}
| AUTOGROUP NUMBER STRING {
struct autogroupwin *aw;
char *p;
if ($2 < 1 || $2 > 9) {
free($3);
yyerror("autogroup number out of range: %d", $2);
YYERROR;
}
XCALLOC(aw, struct autogroupwin);
if ((p = strchr($3, ',')) == NULL) {
aw->name = NULL;
aw->class = xstrdup($3);
} else {
*(p++) = '\0';
aw->name = xstrdup($3);
aw->class = xstrdup(p);
}
aw->group = xstrdup(shortcut_to_name[$2]);
TAILQ_INSERT_TAIL(&conf->autogroupq, aw, entry);
free($3);
}
| IGNORE STRING {
struct winmatch *wm;
XCALLOC(wm, struct winmatch);
strlcpy(wm->title, $2, sizeof(wm->title));
wm->opts |= CONF_IGNORECASE;
TAILQ_INSERT_TAIL(&conf->ignoreq, wm, entry);
free($2);
}
| BIND STRING string {
conf_bindname(conf, $2, $3);
free($2);
free($3);
}
;
%%
struct keywords {
const char *k_name;
int k_val;
};
int
yyerror(const char *fmt, ...)
{
va_list ap;
file->errors++;
va_start(ap, fmt);
fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
return (0);
}
int
kw_cmp(const void *k, const void *e)
{
return (strcmp(k, ((const struct keywords *)e)->k_name));
}
int
lookup(char *s)
{
/* this has to be sorted always */
static const struct keywords keywords[] = {
{ "autogroup", AUTOGROUP},
{ "bind", BIND},
{ "command", COMMAND},
{ "fontname", FONTNAME},
{ "ignore", IGNORE},
{ "no", NO},
{ "sticky", STICKY},
{ "yes", YES}
};
const struct keywords *p;
p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
sizeof(keywords[0]), kw_cmp);
if (p)
return (p->k_val);
else
return (STRING);
}
#define MAXPUSHBACK 128
char *parsebuf;
int parseindex;
char pushback_buffer[MAXPUSHBACK];
int pushback_index = 0;
int
lgetc(int quotec)
{
int c, next;
if (parsebuf) {
/* Read character from the parsebuffer instead of input. */
if (parseindex >= 0) {
c = parsebuf[parseindex++];
if (c != '\0')
return (c);
parsebuf = NULL;
} else
parseindex++;
}
if (pushback_index)
return (pushback_buffer[--pushback_index]);
if (quotec) {
if ((c = getc(file->stream)) == EOF) {
yyerror("reached end of file while parsing quoted string");
if (popfile() == EOF)
return (EOF);
return (quotec);
}
return (c);
}
while ((c = getc(file->stream)) == '\\') {
next = getc(file->stream);
if (next != '\n') {
c = next;
break;
}
yylval.lineno = file->lineno;
file->lineno++;
}
while (c == EOF) {
if (popfile() == EOF)
return (EOF);
c = getc(file->stream);
}
return (c);
}
int
lungetc(int c)
{
if (c == EOF)
return (EOF);
if (parsebuf) {
parseindex--;
if (parseindex >= 0)
return (c);
}
if (pushback_index < MAXPUSHBACK-1)
return (pushback_buffer[pushback_index++] = c);
else
return (EOF);
}
int
findeol(void)
{
int c;
parsebuf = NULL;
pushback_index = 0;
/* skip to either EOF or the first real EOL */
while (1) {
c = lgetc(0);
if (c == '\n') {
file->lineno++;
break;
}
if (c == EOF)
break;
}
return (ERROR);
}
int
yylex(void)
{
char buf[8096];
char *p;
int quotec, next, c;
int token;
p = buf;
while ((c = lgetc(0)) == ' ' || c == '\t')
; /* nothing */
yylval.lineno = file->lineno;
if (c == '#')
while ((c = lgetc(0)) != '\n' && c != EOF)
; /* nothing */
switch (c) {
case '\'':
case '"':
quotec = c;
while (1) {
if ((c = lgetc(quotec)) == EOF)
return (0);
if (c == '\n') {
file->lineno++;
continue;
} else if (c == '\\') {
if ((next = lgetc(quotec)) == EOF)
return (0);
if (next == quotec || c == ' ' || c == '\t')
c = next;
else if (next == '\n')
continue;
else
lungetc(next);
} else if (c == quotec) {
*p = '\0';
break;
}
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
*p++ = (char)c;
}
yylval.v.string = strdup(buf);
if (yylval.v.string == NULL)
err(1, "yylex: strdup");
return (STRING);
}
#define allowed_to_end_number(x) \
(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
if (c == '-' || isdigit(c)) {
do {
*p++ = c;
if ((unsigned)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(0)) != EOF && isdigit(c));
lungetc(c);
if (p == buf + 1 && buf[0] == '-')
goto nodigits;
if (c == EOF || allowed_to_end_number(c)) {
const char *errstr = NULL;
*p = '\0';
yylval.v.number = strtonum(buf, LLONG_MIN,
LLONG_MAX, &errstr);
if (errstr) {
yyerror("\"%s\" invalid number: %s",
buf, errstr);
return (findeol());
}
return (NUMBER);
} else {
nodigits:
while (p > buf + 1)
lungetc(*--p);
c = *--p;
if (c == '-')
return (c);
}
}
#define allowed_in_string(x) \
(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
x != '{' && x != '}' && x != '<' && x != '>' && \
x != '!' && x != '=' && x != '/' && x != '#' && \
x != ','))
if (isalnum(c) || c == ':' || c == '_' || c == '*') {
do {
*p++ = c;
if ((unsigned)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
lungetc(c);
*p = '\0';
if ((token = lookup(buf)) == STRING)
if ((yylval.v.string = strdup(buf)) == NULL)
err(1, "yylex: strdup");
return (token);
}
if (c == '\n') {
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF)
return (0);
return (c);
}
struct file *
pushfile(const char *name)
{
struct file *nfile;
if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
(nfile->name = strdup(name)) == NULL) {
warn("malloc");
return (NULL);
}
if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
warn("%s", nfile->name);
free(nfile->name);
free(nfile);
return (NULL);
}
nfile->lineno = 1;
TAILQ_INSERT_TAIL(&files, nfile, entry);
return (nfile);
}
int
popfile(void)
{
struct file *prev;
if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
prev->errors += file->errors;
TAILQ_REMOVE(&files, file, entry);
fclose(file->stream);
free(file->name);
free(file);
file = prev;
return (0);
}
return (EOF);
}
void
conf_clear(struct conf *c)
{
struct autogroupwin *ag, *agnext;
struct keybinding *kb, *kbnext;
struct winmatch *wm, *wmnext;
struct cmd *cmd, *cmdnext;
for (cmd = TAILQ_FIRST(&c->cmdq); cmd != NULL; cmd = cmdnext) {
cmdnext = TAILQ_NEXT(cmd, entry);
TAILQ_REMOVE(&c->cmdq, cmd, entry);
free(cmd);
}
for (kb = TAILQ_FIRST(&c->keybindingq); kb != NULL; kb = kbnext) {
kbnext = TAILQ_NEXT(kb, entry);
TAILQ_REMOVE(&c->keybindingq, kb, entry);
free(kb);
}
for (ag = TAILQ_FIRST(&c->autogroupq); ag != NULL; ag = agnext) {
agnext = TAILQ_NEXT(ag, entry);
TAILQ_REMOVE(&c->autogroupq, ag, entry);
free(ag->class);
if (ag->name)
free(ag->name);
free(ag->group);
free(ag);
}
for (wm = TAILQ_FIRST(&c->ignoreq); wm != NULL; wm = wmnext) {
wmnext = TAILQ_NEXT(wm, entry);
TAILQ_REMOVE(&c->ignoreq, wm, entry);
free(wm);
}
if (c->DefaultFontName != NULL &&
c->DefaultFontName != DEFAULTFONTNAME)
free(c->DefaultFontName);
}
int
parse_config(const char *filename, struct conf *xconf)
{
int errors = 0;
if ((conf = malloc(sizeof(struct conf))) == NULL)
return (-1);
if ((file = pushfile(filename)) == NULL) {
free(conf);
return (-1);
}
strlcpy(conf->conf_path, filename, sizeof(conf->conf_path));
conf_init(conf);
yyparse();
errors = file->errors;
file->errors = 0;
popfile();
if (errors) {
conf_clear(conf);
}
else {
struct autogroupwin *ag, *agnext;
struct keybinding *kb, *kbnext;
struct winmatch *wm, *wmnext;
struct cmd *cmd, *cmdnext;
conf_clear(xconf);
xconf->flags = conf->flags;
for (cmd = TAILQ_FIRST(&conf->cmdq); cmd != NULL; cmd = cmdnext) {
cmdnext = TAILQ_NEXT(cmd, entry);
TAILQ_REMOVE(&conf->cmdq, cmd, entry);
TAILQ_INSERT_TAIL(&xconf->cmdq, cmd, entry);
}
for (kb = TAILQ_FIRST(&conf->keybindingq); kb != NULL; kb = kbnext) {
kbnext = TAILQ_NEXT(kb, entry);
TAILQ_REMOVE(&conf->keybindingq, kb, entry);
TAILQ_INSERT_TAIL(&xconf->keybindingq, kb, entry);
}
for (ag = TAILQ_FIRST(&conf->autogroupq); ag != NULL; ag = agnext) {
agnext = TAILQ_NEXT(ag, entry);
TAILQ_REMOVE(&conf->autogroupq, ag, entry);
TAILQ_INSERT_TAIL(&xconf->autogroupq, ag, entry);
}
for (wm = TAILQ_FIRST(&conf->ignoreq); wm != NULL; wm = wmnext) {
wmnext = TAILQ_NEXT(wm, entry);
TAILQ_REMOVE(&conf->ignoreq, wm, entry);
TAILQ_INSERT_TAIL(&xconf->ignoreq, wm, entry);
}
strlcpy(xconf->termpath, conf->termpath, sizeof(xconf->termpath));
strlcpy(xconf->lockpath, conf->lockpath, sizeof(xconf->lockpath));
xconf->DefaultFontName = conf->DefaultFontName;
}
free(conf);
return (errors ? -1 : 0);
}