cwm/parse.y

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/* $OpenBSD$ */
/*
* 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;
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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 GAP MOUSEBIND
%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; }
;
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main : FONTNAME STRING {
free(conf->DefaultFontName);
conf->DefaultFontName = $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 < 0 || $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));
TAILQ_INSERT_TAIL(&conf->ignoreq, wm, entry);
free($2);
}
| BIND STRING string {
conf_bindname(conf, $2, $3);
free($2);
free($3);
}
| GAP NUMBER NUMBER NUMBER NUMBER {
conf->gap_top = $2;
conf->gap_bottom = $3;
conf->gap_left = $4;
conf->gap_right = $5;
}
| MOUSEBIND STRING string {
conf_mousebind(conf, $2, $3);
free($2);
free($3);
}
;
%%
struct keywords {
const char *k_name;
int k_val;
};
int
yyerror(const char *fmt, ...)
{
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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},
{ "gap", GAP},
{ "ignore", IGNORE},
{ "mousebind", MOUSEBIND},
{ "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 = xstrdup(buf);
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 != ','))
if (isalnum(c) || 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)
yylval.v.string = xstrdup(buf);
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;
nfile = xcalloc(1, sizeof(struct file));
nfile->name = xstrdup(name);
if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
if (errno != ENOENT)
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;
struct keybinding *kb;
struct winmatch *wm;
struct cmd *cmd;
struct mousebinding *mb;
while ((cmd = TAILQ_FIRST(&c->cmdq)) != NULL) {
TAILQ_REMOVE(&c->cmdq, cmd, entry);
free(cmd);
}
while ((kb = TAILQ_FIRST(&c->keybindingq)) != NULL) {
TAILQ_REMOVE(&c->keybindingq, kb, entry);
free(kb);
}
while ((ag = TAILQ_FIRST(&c->autogroupq)) != NULL) {
TAILQ_REMOVE(&c->autogroupq, ag, entry);
free(ag->class);
if (ag->name)
free(ag->name);
free(ag->group);
free(ag);
}
while ((wm = TAILQ_FIRST(&c->ignoreq)) != NULL) {
TAILQ_REMOVE(&c->ignoreq, wm, entry);
free(wm);
}
while ((mb = TAILQ_FIRST(&c->mousebindingq)) != NULL) {
TAILQ_REMOVE(&c->mousebindingq, mb, entry);
free(mb);
}
if (c->DefaultFontName != NULL &&
c->DefaultFontName != DEFAULTFONTNAME)
free(c->DefaultFontName);
}
int
parse_config(const char *filename, struct conf *xconf)
{
int errors = 0;
XCALLOC(conf, struct conf);
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;
struct keybinding *kb;
struct winmatch *wm;
struct cmd *cmd;
struct mousebinding *mb;
conf_clear(xconf);
xconf->flags = conf->flags;
while ((cmd = TAILQ_FIRST(&conf->cmdq)) != NULL) {
TAILQ_REMOVE(&conf->cmdq, cmd, entry);
TAILQ_INSERT_TAIL(&xconf->cmdq, cmd, entry);
}
while ((kb = TAILQ_FIRST(&conf->keybindingq)) != NULL) {
TAILQ_REMOVE(&conf->keybindingq, kb, entry);
TAILQ_INSERT_TAIL(&xconf->keybindingq, kb, entry);
}
while ((ag = TAILQ_FIRST(&conf->autogroupq)) != NULL) {
TAILQ_REMOVE(&conf->autogroupq, ag, entry);
TAILQ_INSERT_TAIL(&xconf->autogroupq, ag, entry);
}
while ((wm = TAILQ_FIRST(&conf->ignoreq)) != NULL) {
TAILQ_REMOVE(&conf->ignoreq, wm, entry);
TAILQ_INSERT_TAIL(&xconf->ignoreq, wm, entry);
}
while ((mb = TAILQ_FIRST(&conf->mousebindingq)) != NULL) {
TAILQ_REMOVE(&conf->mousebindingq, mb, entry);
TAILQ_INSERT_TAIL(&xconf->mousebindingq, mb, entry);
}
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strlcpy(xconf->termpath, conf->termpath,
sizeof(xconf->termpath));
strlcpy(xconf->lockpath, conf->lockpath,
sizeof(xconf->lockpath));
xconf->DefaultFontName = conf->DefaultFontName;
bcopy(&(conf->gap_top), &(xconf->gap_top), sizeof(int) * 4);
}
free(conf);
return (errors ? -1 : 0);
}