path: root/xc/lib/X11/lcDB.c

/* $TOG: lcDB.c /main/16 1998/06/26 14:37:14 kaleb $ */
/*
 *
 * Copyright IBM Corporation 1993
 *
 * All Rights Reserved
 *
 * License to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and that
 * both that copyright notice and this permission notice appear in
 * supporting documentation, and that the name of IBM not be
 * used in advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 *
 * IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS, AND 
 * NONINFRINGEMENT OF THIRD PARTY RIGHTS, IN NO EVENT SHALL
 * IBM BE LIABLE FOR ANY SPECIAL, 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.
 *
*/
/*
 *  (c) Copyright 1995 FUJITSU LIMITED
 *  This is source code modified by FUJITSU LIMITED under the Joint
 *  Development Agreement for the CDE/Motif PST.
 */
/* $XFree86: xc/lib/X11/lcDB.c,v 3.11 2000/01/29 18:58:16 dawes Exp $ */



#ifndef	NOT_X_ENV

#include <X11/Xlib.h>
#include <X11/Xresource.h>
#include "Xlibint.h"
#include "XlcPubI.h"

#else	/* NOT_X_ENV */

#define	Xmalloc	malloc
#define	Xrealloc	realloc
#define	Xfree	free

#endif	/* NOT_X_ENV */

/* specifying NOT_X_ENV allows users to just use
   the database parsing routine. */
/* For UDC/VW */
#ifndef	BUFSIZE
#define	BUFSIZE	2048
#endif

#ifdef COMMENT
#ifdef  BUFSIZE
#undef BUFSIZE
#endif
#define BUFSIZE 6144 /* 2048*3 */
#endif

#include <stdio.h>

typedef struct _DatabaseRec {
    char *category;
    char *name;
    char **value;
    int value_num;
    struct _DatabaseRec *next;
} DatabaseRec, *Database;

typedef enum {
    S_NULL,	/* outside category */
    S_CATEGORY,	/* inside category */
    S_NAME,	/* has name, expecting values */
    S_VALUE
} ParseState;

typedef enum {
    T_NEWLINE,
    T_COMMENT,
    T_SEMICOLON,
    T_DOUBLE_QUOTE,
    T_LEFT_BRACE,
    T_RIGHT_BRACE,
    T_SPACE,
    T_TAB,
    T_BACKSLASH,
    T_NUMERIC_HEX,
    T_NUMERIC_DEC,
    T_NUMERIC_OCT,
    T_DEFAULT
} Token;

typedef struct {
    Token token;	/* token id */
    char *name;		/* token sequence */
    int len;		/* length of token sequence */
    int (*parse_proc)(); /* parsing procedure */
} TokenTable;

static int f_newline();
static int f_comment();
static int f_semicolon();
static int f_double_quote();
static int f_left_brace();
static int f_right_brace();
static int f_white();
static int f_backslash();
static int f_numeric();
static int f_default();

static TokenTable token_tbl[] = {
    { T_NEWLINE,	"\n",	1,	f_newline },
    { T_COMMENT,	"#",	1,	f_comment },
    { T_SEMICOLON,	";",	1,	f_semicolon },
    { T_DOUBLE_QUOTE,	"\"",	1,	f_double_quote },
    { T_LEFT_BRACE,	"{",	1,	f_left_brace },
    { T_RIGHT_BRACE,	"}",	1,	f_right_brace },
    { T_SPACE,		" ",	1,	f_white },
    { T_TAB,		"\t",	1,	f_white },
    { T_BACKSLASH,	"\\",	1,	f_backslash },
    { T_NUMERIC_HEX,	"\\x",	2,	f_numeric },
    { T_NUMERIC_DEC,	"\\d",	2,	f_numeric },
    { T_NUMERIC_OCT,	"\\o",	2,	f_numeric },
    { T_DEFAULT,	" ",	1,	f_default },	/* any character */
    {0} 
};

#define	SYM_CR          '\r'
#define	SYM_NEWLINE	'\n'
#define	SYM_COMMENT	'#'
#define	SYM_SEMICOLON	';'
#define	SYM_DOUBLE_QUOTE	'"'
#define	SYM_LEFT_BRACE	'{'
#define	SYM_RIGHT_BRACE	'}'
#define	SYM_SPACE	' '
#define	SYM_TAB		'\t'
#define	SYM_BACKSLASH	'\\'

/************************************************************************/

#define MAX_NAME_NEST	64

typedef struct {
    ParseState pre_state;
    char *category;
    char *name[MAX_NAME_NEST];
    int nest_depth;
    char **value;
    int value_len;
    int value_num;
    int bufsize;        /* bufMaxSize >= bufsize >= 0 */
    int bufMaxSize;     /* default : BUFSIZE */
    char *buf;
} DBParseInfo;

static DBParseInfo parse_info;

static void init_parse_info()
{
    static int allocated /* = 0 */;
    char *ptr;
    int  size;
    if (!allocated) {
	bzero(&parse_info, sizeof(DBParseInfo));
	parse_info.buf = (char *)Xmalloc(BUFSIZE);
	parse_info.bufMaxSize = BUFSIZE;
	allocated = 1;
	return;
    }
    ptr = parse_info.buf;
    size = parse_info.bufMaxSize;
    bzero(&parse_info, sizeof(DBParseInfo));
    parse_info.buf = ptr;
    parse_info.bufMaxSize = size;
}

static void
clear_parse_info()
{
    int i;
    char *ptr;
    int size;
    parse_info.pre_state = S_NULL;
    if(parse_info.category != NULL){
	Xfree(parse_info.category);
    }
    for(i = 0; i <= parse_info.nest_depth; ++i){
	if(parse_info.name[i]){
	    Xfree(parse_info.name[i]);
	}
    }
    if(parse_info.value){
	if(*parse_info.value){
	    Xfree(*parse_info.value);
	}
	Xfree((char *)parse_info.value);
    }
    ptr = parse_info.buf;
    size = parse_info.bufMaxSize;
    bzero(&parse_info, sizeof(DBParseInfo));
    parse_info.buf = ptr;
    parse_info.bufMaxSize = size;
}

static Bool
realloc_parse_info(len)
int len;
{
    char *p;


    parse_info.bufMaxSize = BUFSIZE * 
	    ((parse_info.bufsize + len)/BUFSIZE + 1);
    p = (char *)Xrealloc(parse_info.buf, parse_info.bufMaxSize);
    if(p == NULL){
        return(False);
    }
    parse_info.buf = p;

    return(True);
}
/************************************************************************/
typedef struct _Line {
    char *str;
    int cursize;
    int maxsize;
    int seq;
} Line;

static void
free_line(line)
    Line *line;
{
    if(line->str != NULL){
	Xfree(line->str);
    }
    bzero(line, sizeof(Line));
}

static int
realloc_line(line, size)
    Line *line;
    int size;
{
    char *str = line->str;

    if(str != NULL){
	str = (char *)Xrealloc(str, size);
    }else{
	str = (char *)Xmalloc(size);
    }
    if(str == NULL){
	/* malloc error */
	if (line->str != NULL) {
	    Xfree(line->str);
	}
	bzero(line, sizeof(Line));
	return 0;
    }
    line->str = str;
    line->maxsize = size;
    return 1;
}

#define	iswhite(ch)	((ch) == SYM_SPACE   || (ch) == SYM_TAB)

static void
zap_comment(str, quoted)
    char *str;
    int *quoted;
{
    char *p = str;
#ifdef	never
    *quoted = 0;
    if(*p == SYM_COMMENT){
	int len = strlen(str);
	if(p[len - 1] == SYM_NEWLINE || p[len - 1] == SYM_CR){
	    *p++ = SYM_NEWLINE;
	}
	*p = '\0';
    }
#else
    while(*p){
	if(*p == SYM_DOUBLE_QUOTE){
	    if(p == str || p[-1] != SYM_BACKSLASH){
		/* unescaped double quote changes quoted state. */
		*quoted = *quoted ? 0 : 1;
	    }
	}
	if(*p == SYM_COMMENT && !*quoted){
	    int pos = p - str;
	    if(pos == 0 ||
	       (iswhite(p[-1]) && (pos == 1 || p[-2] != SYM_BACKSLASH))) {
		int len = strlen(p);
		if(len > 0 && (p[len - 1] == SYM_NEWLINE || p[len-1] == SYM_CR)) {
		    /* newline is the identifier for finding end of value.
		       therefore, it should not be removed. */
		    *p++ = SYM_NEWLINE;
		}
		*p = '\0';
		break;
	    }
	}
	++p;
    }
#endif
}

static int
read_line(fd, line)
    FILE *fd;
    Line *line;
{
    char buf[BUFSIZE], *p;
    int len;
    int quoted = 0;	/* quoted by double quote? */
    char *str;
    int cur;

    str = line->str;
    cur = line->cursize = 0;

    while((p = fgets(buf, BUFSIZE, fd)) != NULL){
	++line->seq;
	zap_comment(p, &quoted);	/* remove comment line */
	len = strlen(p);
	if(len == 0){
	    if(cur > 0){
		break;
	    }
	    continue;
	}
	if(cur + len + 1 > line->maxsize){
	    /* need to reallocate buffer. */
	    if(! realloc_line(line, line->maxsize + BUFSIZE)){
		return -1;	/* realloc error. */
	    }
	    str = line->str;
	}
	strncpy(str + cur, p, len);

	cur += len;
	str[cur] = '\0';
#ifdef __EMX__  /* Take out carriage returns under OS/2 */
	if(cur>1) {
	   if(str[cur-2] == '\r' && str[cur-1] == '\n'){
	      str[cur-2] = '\n';
	      str[cur-1] = '\0';
	      cur--;
	   }
	}
#endif
	if(!quoted){
	    if(cur > 1 && str[cur - 2] == SYM_BACKSLASH &&
	       (str[cur - 1] == SYM_NEWLINE || str[cur-1] == SYM_CR)){
		/* the line is ended backslash followed by newline.
		   need to concatinate the next line. */
		cur -= 2;
		str[cur] = '\0';
	    }else{
		break;
	    }
	}
    }
    if(quoted){
	/* error.  still in quoted state. */
	return -1;
    }
    return line->cursize = cur;
}

/************************************************************************/

static Token
get_token(str)
    char *str;
{
    switch(*str){
    case SYM_NEWLINE:
    case SYM_CR:	return T_NEWLINE;
    case SYM_COMMENT:	return T_COMMENT;
    case SYM_SEMICOLON:	return T_SEMICOLON;
    case SYM_DOUBLE_QUOTE:	return T_DOUBLE_QUOTE;
    case SYM_LEFT_BRACE:	return T_LEFT_BRACE;
    case SYM_RIGHT_BRACE:	return T_RIGHT_BRACE;
    case SYM_SPACE:	return T_SPACE;
    case SYM_TAB:	return T_TAB;
    case SYM_BACKSLASH:
	switch(str[1]){
	case 'x': return T_NUMERIC_HEX;
	case 'd': return T_NUMERIC_DEC;
	case 'o': return T_NUMERIC_OCT;
	}
	return T_BACKSLASH;
    default:
	return T_DEFAULT;
    }
}

static int
get_word(str, word)
    char *str;
    char *word;
{
    char *p = str, *w = word;
    Token token;
    int token_len;

    while(*p != '\0'){
	token = get_token(p);
	token_len = token_tbl[token].len;
	if(token == T_BACKSLASH){
	    p += token_len;
	    if(*p == '\0'){
		break;
	    }
	    token = get_token(p);
	    token_len = token_tbl[token].len;
	}else if(token != T_COMMENT &&
		 token != T_DEFAULT){
	    break;
	}
	strncpy(w, p, token_len);
	p += token_len; w += token_len;
    }
    *w = '\0';
    return p - str;	/* return number of scanned chars */
}

static int
get_quoted_word(str, word)
    char *str;
    char *word;
{
    char *p = str, *w = word;
    Token token;
    int token_len;

    if(*p == SYM_DOUBLE_QUOTE){
	++p;
    }
    while(*p != '\0'){
	token = get_token(p);
	token_len = token_tbl[token].len;
	if(token == T_DOUBLE_QUOTE){
	    p += token_len;
	    goto found;
	}
	if(token == T_BACKSLASH){
	    p += token_len;
	    if(*p == '\0'){
		break;
	    }
	    token = get_token(p);
	    token_len = token_tbl[token].len;
	}
	strncpy(w, p, token_len);
	p += token_len; w += token_len;
    }
    /* error. cannot detect next double quote */
    return 0;

 found:;
    *w = '\0';
    return p - str;
}

/************************************************************************/

static int
append_value_list()
{
    char **value_list = parse_info.value;
    char *value;
    int value_num = parse_info.value_num;
    int value_len = parse_info.value_len;
    char *str = parse_info.buf;
    int len = parse_info.bufsize;
    char *p;

    if(len < 1){
	return 1; /* return with no error */
    }

    if(value_list == (char **)NULL){
	value_list = (char **)Xmalloc(sizeof(char *) * 2);
	*value_list = NULL;
    }else{
	char **prev_list = value_list;

	value_list = (char **)
	    Xrealloc(value_list, sizeof(char *) * (value_num + 2));
	if (value_list == NULL){
	    Xfree(prev_list);
	}
    }
    if(value_list == (char **)NULL){
	goto err;
    }

    value = *value_list;
    if(value == NULL){
	value = (char *)Xmalloc(value_len + len + 1);
    }else{
	char *prev_value = value;

	value = (char *)Xrealloc(value, value_len + len + 1);
	if (value == NULL){
	    Xfree(prev_value);
	}
    }
    if(value == NULL){
	goto err;
    }
    if(value != *value_list){
	int delta, i;
	delta = value - *value_list;
	*value_list = value;
	for(i = 1; i < value_num; ++i){
	    value_list[i] += delta;
	}
    }

    value_list[value_num] = p = &value[value_len];
    value_list[value_num + 1] = NULL;
    strncpy(p, str, len);
    p[len] = 0;

    parse_info.value = value_list;
    parse_info.value_num = value_num + 1;
    parse_info.value_len = value_len + len + 1;
    parse_info.bufsize = 0;
    return 1;

 err:
    if(value_list){
	Xfree((char **)value_list);
    }
    if(value){
	Xfree(value);
    }
    parse_info.value = (char **)NULL;
    parse_info.value_num = 0;
    parse_info.value_len = 0;
    parse_info.bufsize = 0;
    return 0;
}

static int 
construct_name(name, size)
    char *name;
    int size;
{
    register int i, len = 0;
    char *p = name;

    for(i = 0; i <= parse_info.nest_depth; ++i){
	len += strlen(parse_info.name[i]) + 1;
    }
    if (len >= size)
	return 0;

    strcpy(p, parse_info.name[0]);
    p += strlen(parse_info.name[0]);
    for(i = 1; i <= parse_info.nest_depth; ++i){
	*p++ = '.';
	strcpy(p, parse_info.name[i]);
	p += strlen(parse_info.name[i]);
    }
    return *name != '\0';
}

static int
store_to_database(db)
    Database *db;
{
    Database new = (Database)NULL;
    char name[BUFSIZE];

    if(parse_info.pre_state == S_VALUE){
	if(! append_value_list()){
	    goto err;
	}
    }

    if(parse_info.name[parse_info.nest_depth] == NULL){
	goto err;
    }

    new = (Database)Xmalloc(sizeof(DatabaseRec));
    if(new == (Database)NULL){
	goto err;
    }
    bzero(new, sizeof(DatabaseRec));

    new->category = (char *)Xmalloc(strlen(parse_info.category) + 1);
    if(new->category == NULL){
	goto err;
    }
    strcpy(new->category, parse_info.category);

    if(! construct_name(name, sizeof(name))){
	goto err;
    }
    new->name = (char *)Xmalloc(strlen(name) + 1);
    if(new->name == NULL){
	goto err;
    }
    strcpy(new->name, name);
    new->next = *db;
    new->value = parse_info.value;
    new->value_num = parse_info.value_num;
    *db = new;

    Xfree(parse_info.name[parse_info.nest_depth]);
    parse_info.name[parse_info.nest_depth] = NULL;

    parse_info.value = (char **)NULL;
    parse_info.value_num = 0;
    parse_info.value_len = 0;

    return 1;

 err:
    if(new){
	if(new->category){
	    Xfree(new->category);
	}
	if(new->name){
	    Xfree(new->name);
	}
    }
    if(parse_info.value){
	if(*parse_info.value){
	    Xfree(*parse_info.value);
	}
	Xfree((char **)parse_info.value);
	parse_info.value = (char **)NULL;
	parse_info.value_num = 0;
	parse_info.value_len = 0;
    }
    return 0;
}

#define END_MARK	"END"
#define	END_MARK_LEN	3 /*strlen(END_MARK)*/

static int
check_category_end(str)
    char *str;
{
    char *p;
    int len;

    p = str;
    if(strncmp(p, END_MARK, END_MARK_LEN)){
	return 0;
    }
    p += END_MARK_LEN;

    while(iswhite(*p)){
	++p;
    }
    len = strlen(parse_info.category);
    if(strncmp(p, parse_info.category, len)){
	return 0;
    }
    p += len;
    return p - str;
}

/************************************************************************/

static int
f_newline(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    switch(parse_info.pre_state){
    case S_NULL:
    case S_CATEGORY:
	break;
    case S_NAME:
	return 0; /* no value */
    case S_VALUE:
	if(!store_to_database(db))
	    return 0;
	parse_info.pre_state = S_CATEGORY;
	break;
    default:
	return 0;
    }
    return token_tbl[token].len;
}

static int
f_comment(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    /* NOTE: comment is already handled in read_line(),
       so this function is not necessary. */

    char *p = str;

    while(*p != SYM_NEWLINE && *p != SYM_CR && *p != '\0'){
	++p;	/* zap to the end of line */
    }
    return p - str;
}

static int
f_white(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    char *p = str;

    while(iswhite(*p)){
	++p;
    }
    return p - str;
}

static int
f_semicolon(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    switch(parse_info.pre_state){
    case S_NULL:
    case S_CATEGORY:
    case S_NAME:
	return 0;
    case S_VALUE:
	if(! append_value_list())
	    return 0;
	parse_info.pre_state = S_VALUE;
	break;
    default:
	return 0;
    }
    return token_tbl[token].len;
}

static int
f_left_brace(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    switch(parse_info.pre_state){
    case S_NULL:
    case S_CATEGORY:
    case S_VALUE:
	return 0;
    case S_NAME:
	if(parse_info.name[parse_info.nest_depth] == NULL ||
	   parse_info.nest_depth + 1 > MAX_NAME_NEST)
	    return 0;
	++parse_info.nest_depth;
	parse_info.pre_state = S_CATEGORY;
	break;
    default:
	return 0;
    }
    return token_tbl[token].len;
}

static int
f_right_brace(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    if(parse_info.nest_depth < 1)
	return 0;

    switch(parse_info.pre_state){
    case S_NULL:
    case S_NAME:
	return 0;
    case S_VALUE:
	if(! store_to_database(db))
	    return 0;
	/* fall into next case */
    case S_CATEGORY:
	if(parse_info.name[parse_info.nest_depth] != NULL){
	    Xfree(parse_info.name[parse_info.nest_depth]);
	    parse_info.name[parse_info.nest_depth] = NULL;
	}
	--parse_info.nest_depth;
	parse_info.pre_state = S_CATEGORY;
	break;
    default:
	return 0;
    }
    return token_tbl[token].len;
}

static int
f_double_quote(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    char word[BUFSIZE];
    char* wordp;
    int len;

    if ((len = strlen (str)) < sizeof word)
	wordp = word;
    else
	wordp = Xmalloc (len + 1);
    if (wordp == NULL)
	return 0;

    len = 0;
    switch(parse_info.pre_state){
    case S_NULL:
    case S_CATEGORY:
	goto err;
    case S_NAME:
    case S_VALUE:
	len = get_quoted_word(str, wordp);
	if(len < 1)
	    goto err;
	if( (parse_info.bufsize + (int)strlen(wordp) +1) 
					>= parse_info.bufMaxSize){
	    if(realloc_parse_info(strlen(wordp) +1) == False){
		goto err;
	    }
	}
	strcpy(&parse_info.buf[parse_info.bufsize], wordp);
	parse_info.bufsize += strlen(wordp);
	parse_info.pre_state = S_VALUE;
	break;
    default:
	goto err;
    }
    if (wordp != word) Xfree (wordp);
    return len;	/* including length of token */

err:
    if (wordp != word) Xfree (wordp);
    return 0;
}

static int
f_backslash(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    return f_default(str, token, db);
}

static int
f_numeric(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    char word[BUFSIZE], *p;
    char* wordp;
    int len;
    int token_len;

    if ((len = strlen (str)) < sizeof word)
	wordp = word;
    else
	wordp = Xmalloc (len + 1);
    if (wordp == NULL)
	return 0;

    switch(parse_info.pre_state){
    case S_NULL:
    case S_CATEGORY:
	goto err;
    case S_NAME:
    case S_VALUE:
	token_len = token_tbl[token].len;
	p = str + token_len;
	len = get_word(p, wordp);
	if(len < 1)
	    goto err;
	if( (parse_info.bufsize + token_len + (int)strlen(wordp) +1) 
					>= parse_info.bufMaxSize){
	    if(realloc_parse_info(token_len + strlen(wordp) +1) == False)
		goto err;
	}
	strncpy(&parse_info.buf[parse_info.bufsize], str, token_len);
	strcpy(&parse_info.buf[parse_info.bufsize + token_len], wordp);
	parse_info.bufsize += token_len + strlen(wordp);
	parse_info.pre_state = S_VALUE;
	break;
    default:
	goto err;
    }
    if (wordp != word) Xfree (wordp);
    return len + token_len;

err:
    if (wordp != word) Xfree (wordp);
    return 0;
}

static int
f_default(str, token, db)
    char *str;
    Token token;
    Database *db;
{
    char word[BUFSIZE], *p;
    char* wordp;
    int len;

    if ((len = strlen (str)) < sizeof word)
	wordp = word;
    else
	wordp = Xmalloc (len + 1);
    if (wordp == NULL)
	return 0;

    len = get_word(str, wordp);
    if(len < 1)
	goto err;

    switch(parse_info.pre_state){
    case S_NULL:
	if(parse_info.category != NULL)
	    goto err;
	p = (char *)Xmalloc(strlen(wordp) + 1);
	if(p == NULL)
	    goto err;
	strcpy(p, wordp);
	parse_info.category = p;
	parse_info.pre_state = S_CATEGORY;
	break;
    case S_CATEGORY:
	if(parse_info.nest_depth == 0){
	    if(check_category_end(str)){
		/* end of category is detected.
		   clear context and zap to end of this line */
		clear_parse_info();
		len = strlen(str);
		break;
	    }
	}
	p = (char *)Xmalloc(strlen(wordp) + 1);
	if(p == NULL)
	    goto err;
	strcpy(p, wordp);
	if(parse_info.name[parse_info.nest_depth] != NULL){
	    Xfree(parse_info.name[parse_info.nest_depth]);
	}
	parse_info.name[parse_info.nest_depth] = p;
	parse_info.pre_state = S_NAME;
	break;
    case S_NAME:
    case S_VALUE:
	if( (parse_info.bufsize + (int)strlen(wordp) +1 ) 
					>= parse_info.bufMaxSize){
	    if(realloc_parse_info(strlen(wordp) +1) == False)
		goto err;
	}
	strcpy(&parse_info.buf[parse_info.bufsize], wordp);
	parse_info.bufsize += strlen(wordp);
	parse_info.pre_state = S_VALUE;
	break;
    default:
	goto err;
    }
    if (wordp != word) Xfree (wordp);
    return len;

err:
    if (wordp != word) Xfree (wordp);
    return 0;
}

/************************************************************************/

#ifdef	DEBUG
static void
PrintDatabase(db)
    Database db;
{
    Database p = db;
    int i = 0, j;

    printf("***\n*** BEGIN Database\n***\n");
    while(p){
	printf("%3d: ", i++);
	printf("%s, %s, ", p->category, p->name);
	printf("\t[%d: ", p->value_num);
	for(j = 0; j < p->value_num; ++j){
	    printf("%s, ", p->value[j]);
	}
	printf("]\n");
	p = p->next;
    }
    printf("***\n*** END   Database\n***\n");
}
#endif

static void
DestroyDatabase(db)
    Database db;
{
    Database p = db;

    while(p){
	if(p->category != NULL){
	    Xfree(p->category);
	}
	if(p->name != NULL){
	    Xfree(p->name);
	}
	if(p->value != (char **)NULL){
	    if(*p->value != NULL){
		Xfree(*p->value);
	    }
	    Xfree((char *)p->value);
	}
	db = p->next;
	Xfree((char *)p);
	p = db;
    }
}

static int
CountDatabase(db)
    Database db;
{
    Database p = db;
    int cnt = 0;

    while(p){
	++cnt;
	p = p->next;
    }
    return cnt;
}

static Database
CreateDatabase(dbfile)
    char *dbfile;
{
    Database db = (Database)NULL;
    FILE *fd;
    Line line;
    char *p;
    Token token;
    int len;
    int error = 0;

    fd = _XFopenFile(dbfile, "r");
    if(fd == (FILE *)NULL){
	return NULL;
    }

    bzero(&line, sizeof(Line));
    init_parse_info();

    do {
	int rc = read_line(fd, &line);
	if(rc < 0){
	    error = 1;
	    break;
	}else if(rc == 0){
	    break;
	}
	p = line.str;
	while(*p){
	    token = get_token(p);
	    len = (*token_tbl[token].parse_proc)(p, token, &db);
	    if(len < 1){
		error = 1;
		break;
	    }
	    p += len;
	}
    } while (!error);

    if(parse_info.pre_state != S_NULL){
	clear_parse_info();
	error = 1;
    }
    if(error){
#ifdef	DEBUG
	fprintf(stderr, "database format error at line %d.\n", line.seq);
#endif
	DestroyDatabase(db);
	db = (Database)NULL;
    }

    fclose(fd);
    free_line(&line);

#ifdef	DEBUG
    PrintDatabase(db);
#endif

    return db;
}

/************************************************************************/

#ifndef	NOT_X_ENV

/* locale framework functions */

typedef struct _XlcDatabaseRec {
    XrmQuark category_q;
    XrmQuark name_q;
    Database db;
    struct _XlcDatabaseRec *next;
} XlcDatabaseRec, *XlcDatabase;

typedef	struct _XlcDatabaseListRec {
    XrmQuark name_q;
    XlcDatabase lc_db;
    Database database;
    int ref_count;
    struct _XlcDatabaseListRec *next;
} XlcDatabaseListRec, *XlcDatabaseList;

/* database cache list (per file) */
static XlcDatabaseList _db_list = (XlcDatabaseList)NULL;

/************************************************************************/
/*	_XlcGetResource(lcd, category, class, value, count)		*/
/*----------------------------------------------------------------------*/
/*	This function retrieves XLocale database information.		*/
/************************************************************************/
void
_XlcGetResource(lcd, category, class, value, count)
    XLCd lcd;
    char *category;
    char *class;
    char ***value;
    int *count;
{
    XLCdPublicMethodsPart *methods = XLC_PUBLIC_METHODS(lcd);

    (*methods->get_resource)(lcd, category, class, value, count);
    return;
}

/************************************************************************/
/*	_XlcGetLocaleDataBase(lcd, category, class, value, count)	*/
/*----------------------------------------------------------------------*/
/*	This function retrieves XLocale database information.		*/
/************************************************************************/
void
_XlcGetLocaleDataBase(lcd, category, name, value, count)
    XLCd lcd;
    char *category;
    char *name;
    char ***value;
    int *count;
{
    XlcDatabase lc_db = (XlcDatabase)XLC_PUBLIC(lcd, xlocale_db);
    XrmQuark category_q, name_q;

    category_q = XrmStringToQuark(category);
    name_q = XrmStringToQuark(name);
    for(; lc_db->db; ++lc_db){
	if(category_q == lc_db->category_q && name_q == lc_db->name_q){
	    *value = lc_db->db->value;
	    *count = lc_db->db->value_num;
	    return;
	}
    }
    *value = (char **)NULL;
    *count = 0;
}

/************************************************************************/
/*	_XlcDestroyLocaleDataBase(lcd)					*/
/*----------------------------------------------------------------------*/
/*	This function destroy the XLocale Database that bound to the 	*/
/*	specified lcd.  If the XLocale Database is refered from some 	*/
/*	other lcd, this function just decreases reference count of 	*/
/*	the database.  If no locale refers the database, this function	*/
/*	remove it from the cache list and free work area.		*/
/************************************************************************/
void
_XlcDestroyLocaleDataBase(lcd)
    XLCd lcd;
{
    XlcDatabase lc_db = (XlcDatabase)XLC_PUBLIC(lcd, xlocale_db);
    XlcDatabaseList p, prev;

    for(p = _db_list, prev = (XlcDatabaseList)NULL; p;
	prev = p, p = p->next){
	if(p->lc_db == lc_db){
	    if((-- p->ref_count) < 1){
		if(p->lc_db != (XlcDatabase)NULL){
		    Xfree((char *)p->lc_db);
		}
		DestroyDatabase(p->database);
		if(prev == (XlcDatabaseList)NULL){
		    _db_list = p->next;
		}else{
		    prev->next = p->next;
		}
		Xfree((char*)p);
	    }
	    break;
	}
    }
    XLC_PUBLIC(lcd, xlocale_db) = (XPointer)NULL;
}

/************************************************************************/
/*	_XlcCreateLocaleDataBase(lcd)					*/
/*----------------------------------------------------------------------*/
/*	This function create an XLocale database which correspond to	*/
/*	the specified XLCd.						*/
/************************************************************************/
XPointer
_XlcCreateLocaleDataBase(lcd)
    XLCd lcd;
{
    XlcDatabaseList list, new;
    Database p, database = (Database)NULL;
    XlcDatabase lc_db = (XlcDatabase)NULL;
    XrmQuark name_q;
    char *name;
    int i, n;

    name = _XlcFileName(lcd, "locale");
    if(name == NULL){
	return (XPointer)NULL;
    }

#ifndef __EMX__
    name_q = XrmStringToQuark(name);
#else
    name_q = XrmStringToQuark((char*)__XOS2RedirRoot(name));
#endif
    for(list = _db_list; list; list = list->next){
	if(name_q == list->name_q){
	    list->ref_count++;
	    Xfree (name);
	    return XLC_PUBLIC(lcd, xlocale_db) = (XPointer)list->lc_db;
	}
    }

    database = CreateDatabase(name);
    if(database == (Database)NULL){
	Xfree (name);
	return (XPointer)NULL;
    }
    n = CountDatabase(database);
    lc_db = (XlcDatabase)Xmalloc(sizeof(XlcDatabaseRec) * (n + 1));
    if(lc_db == (XlcDatabase)NULL){
	goto err;
    }
    bzero(lc_db, sizeof(XlcDatabaseRec) * (n + 1));
    for(p = database, i = 0; p && i < n; p = p->next, ++i){
	lc_db[i].category_q = XrmStringToQuark(p->category);
	lc_db[i].name_q = XrmStringToQuark(p->name);
	lc_db[i].db = p;
    }

    new = (XlcDatabaseList)Xmalloc(sizeof(XlcDatabaseListRec));
    if(new == (XlcDatabaseList)NULL){
	goto err;
    }
    new->name_q = name_q;
    new->lc_db = lc_db;
    new->database = database;
    new->ref_count = 1;
    new->next = _db_list;
    _db_list = new;

    Xfree (name);
    return XLC_PUBLIC(lcd, xlocale_db) = (XPointer)lc_db;

 err:
    DestroyDatabase(database);
    if(lc_db != (XlcDatabase)NULL){
	Xfree((char *)lc_db);
    }
    Xfree (name);
    return (XPointer)NULL;
}

#endif	/* NOT_X_ENV */