/*
* Get a quoted or unquoted string. It is recognized by the first
* non-white character. '"' and '"' are not allowed inside the string.
*/
static const char * get_qnqstring( const char * pnt, char ** label )
{
char quote_char;
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
if ( *pnt == '\0' )
return pnt;
quote_char = *pnt;
if ( quote_char == '"' || quote_char == '\'' )
return get_qstring( pnt, label );
else
return get_string( pnt, label );
}
/*
* Tokenize one line.
*/
static void tokenize_line( const char * pnt )
{
static struct kconfig * last_menuoption = NULL;
enum e_token token;
struct kconfig * cfg;
struct dependency ** dep_ptr;
char * buffer = malloc( 64 );
/* skip white space */
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
/*
* categorize the next token
*/
#define match_token(t, s) \
if (strncmp(pnt, s, strlen(s)) == 0) { token = t; pnt += strlen(s); break; }
token = token_UNKNOWN;
switch ( *pnt )
{
default:
break;
case '#':
case '\0':
return;
case 'b':
match_token( token_bool, "bool" );
break;
case 'c':
match_token( token_choice_header, "choice" );
match_token( token_comment, "comment" );
break;
case 'd':
match_token( token_define_bool, "define_bool" );
match_token( token_define_hex, "define_hex" );
match_token( token_define_int, "define_int" );
match_token( token_define_string, "define_string" );
match_token( token_define_tristate, "define_tristate" );
match_token( token_dep_bool, "dep_bool" );
match_token( token_dep_mbool, "dep_mbool" );
match_token( token_dep_tristate, "dep_tristate" );
break;
case 'e':
match_token( token_else, "else" );
match_token( token_endmenu, "endmenu" );
break;
case 'f':
match_token( token_fi, "fi" );
break;
case 'h':
match_token( token_hex, "hex" );
break;
case 'i':
match_token( token_if, "if" );
match_token( token_int, "int" );
break;
case 'm':
match_token( token_mainmenu_name, "mainmenu_name" );
match_token( token_mainmenu_option, "mainmenu_option" );
break;
case 's':
match_token( token_source, "source" );
match_token( token_string, "string" );
break;
case 't':
match_token( token_then, "then" );
match_token( token_tristate, "tristate" );
break;
case 'u':
match_token( token_unset, "unset" );
break;
}
#undef match_token
if ( token == token_source )
{
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
do_source( pnt );
return;
}
if ( token == token_then )
{
if ( config_last != NULL && config_last->token == token_if )
return;
syntax_error( "bogus 'then'" );
}
#if 0
if ( token == token_unset )
{
fprintf( stderr, "Ignoring 'unset' command\n" );
return;
}
#endif
if ( token == token_UNKNOWN )
syntax_error( "unknown command" );
/*
* Allocate an item.
*/
cfg = malloc( sizeof(*cfg) );
memset( cfg, 0, sizeof(*cfg) );
if ( config_last == NULL )
{ config_last = config_list = cfg; }
else
{ config_last->next = cfg; config_last = cfg; }
/*
* Tokenize the arguments.
*/
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
cfg->token = token;
switch ( token )
{
default:
syntax_error( "unknown token" );
case token_bool:
case token_tristate:
pnt = get_qstring ( pnt, &cfg->label );
pnt = get_string ( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
break;
case token_choice_header:
{
static int choose_number = 0;
char * choice_list;
pnt = get_qstring ( pnt, &cfg->label );
pnt = get_qstring ( pnt, &choice_list );
pnt = get_string ( pnt, &cfg->value );
cfg->nameindex = -(choose_number++);
tokenize_choices( cfg, choice_list );
free( choice_list );
}
break;
case token_comment:
pnt = get_qstring(pnt, &cfg->label);
if ( last_menuoption != NULL )
{
pnt = get_qstring(pnt, &cfg->label);
if (cfg->label == NULL)
syntax_error( "missing comment text" );
last_menuoption->label = cfg->label;
last_menuoption = NULL;
}
break;
case token_define_bool:
case token_define_tristate:
pnt = get_string( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
if ( ( pnt[0] == 'Y' || pnt[0] == 'M' || pnt[0] == 'N'
|| pnt[0] == 'y' || pnt[0] == 'm' || pnt[0] == 'n' )
&& ( pnt[1] == '\0' || pnt[1] == ' ' || pnt[1] == '\t' ) )
{
if ( *pnt == 'n' || *pnt == 'N' ) cfg->value = strdup( "CONSTANT_N" );
else if ( *pnt == 'y' || *pnt == 'Y' ) cfg->value = strdup( "CONSTANT_Y" );
else if ( *pnt == 'm' || *pnt == 'M' ) cfg->value = strdup( "CONSTANT_M" );
}
else if ( *pnt == '$' )
{
pnt++;
pnt = get_string( pnt, &cfg->value );
}
else
{
syntax_error( "unknown define_bool value" );
}
get_varnum( cfg->value );
break;
case token_define_hex:
case token_define_int:
pnt = get_string( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
pnt = get_string( pnt, &cfg->value );
break;
case token_define_string:
pnt = get_string( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
pnt = get_qnqstring( pnt, &cfg->value );
if (cfg->value == NULL)
syntax_error( "missing value" );
break;
case token_dep_bool:
case token_dep_mbool:
case token_dep_tristate:
pnt = get_qstring ( pnt, &cfg->label );
pnt = get_string ( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
dep_ptr = &(cfg->depend);
do {
*dep_ptr = (struct dependency *) malloc( sizeof( struct dependency ) );
(*dep_ptr)->next = NULL;
if ( ( pnt[0] == 'Y' || pnt[0] == 'M' || pnt[0] == 'N'
|| pnt[0] == 'y' || pnt[0] == 'm' || pnt[0] == 'n' )
&& ( pnt[1] == '\0' || pnt[1] == ' ' || pnt[1] == '\t' ) )
{
/* dep_tristate 'foo' CONFIG_FOO m */
if ( pnt[0] == 'Y' || pnt[0] == 'y' )
(*dep_ptr)->name = strdup( "CONSTANT_Y" );
else if ( pnt[0] == 'N' || pnt[0] == 'n' )
(*dep_ptr)->name = strdup( "CONSTANT_N" );
else
(*dep_ptr)->name = strdup( "CONSTANT_M" );
pnt++;
get_varnum( (*dep_ptr)->name );
}
else if ( *pnt == '$' )
{
pnt++;
pnt = get_string( pnt, &(*dep_ptr)->name );
get_varnum( (*dep_ptr)->name );
}
else
{
syntax_error( "can't handle dep_bool/dep_mbool/dep_tristate condition" );
}
dep_ptr = &(*dep_ptr)->next;
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
} while ( *pnt );
/*
* Create a conditional for this object's dependencies.
*/
{
char fake_if [1024];
struct dependency * dep;
struct condition ** cond_ptr;
int first = 1;
cond_ptr = &(cfg->cond);
for ( dep = cfg->depend; dep; dep = dep->next )
{
if ( token == token_dep_tristate
&& ! strcmp( dep->name, "CONSTANT_M" ) )
{
continue;
}
if ( first )
{
first = 0;
}
else
{
*cond_ptr = malloc( sizeof(struct condition) );
memset( *cond_ptr, 0, sizeof(struct condition) );
(*cond_ptr)->op = op_and;
cond_ptr = &(*cond_ptr)->next;
}
*cond_ptr = malloc( sizeof(struct condition) );
memset( *cond_ptr, 0, sizeof(struct condition) );
(*cond_ptr)->op = op_lparen;
if ( token == token_dep_bool )
sprintf( fake_if, "[ \"$%s\" = \"y\" -o \"$%s\" = \"\" ]; then",
dep->name, dep->name );
else
sprintf( fake_if, "[ \"$%s\" = \"y\" -o \"$%s\" = \"m\" -o \"$%s\" = \"\" ]; then",
dep->name, dep->name, dep->name );
(*cond_ptr)->next = tokenize_if( fake_if );
while ( *cond_ptr )
cond_ptr = &(*cond_ptr)->next;
*cond_ptr = malloc( sizeof(struct condition) );
memset( *cond_ptr, 0, sizeof(struct condition) );
(*cond_ptr)->op = op_rparen;
cond_ptr = &(*cond_ptr)->next;
}
}
break;
case token_else:
case token_endmenu:
case token_fi:
break;
case token_hex:
case token_int:
pnt = get_qstring ( pnt, &cfg->label );
pnt = get_string ( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
pnt = get_string ( pnt, &cfg->value );
break;
case token_string:
pnt = get_qstring ( pnt, &cfg->label );
pnt = get_string ( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
pnt = get_qnqstring ( pnt, &cfg->value );
if (cfg->value == NULL)
syntax_error( "missing initial value" );
break;
case token_if:
cfg->cond = tokenize_if( pnt );
break;
case token_mainmenu_name:
pnt = get_qstring( pnt, &cfg->label );
break;
case token_mainmenu_option:
if ( strncmp( pnt, "next_comment", 12 ) == 0 )
last_menuoption = cfg;
else
pnt = get_qstring( pnt, &cfg->label );
break;
case token_unset:
pnt = get_string( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
while (*pnt)
{
cfg->next = (struct kconfig *) malloc( sizeof(struct kconfig) );
memset( cfg->next, 0, sizeof(struct kconfig) );
cfg = cfg->next;
cfg->token = token_unset;
pnt = get_string( pnt, &buffer );
cfg->nameindex = get_varnum( buffer );
while ( *pnt == ' ' || *pnt == '\t' )
pnt++;
}
break;
}
return;
}
/*
* Top level parse function. Input pointer is one complete line from config.in
* and the result is that we create a token that describes this line
* and insert it into our linked list.
*/
void parse(char * pnt) {
enum token tok;
struct kconfig * kcfg;
char tmpbuf[24],fake_if[1024];
/*
* Ignore comments and leading whitespace.
*/
pnt = skip_whitespace(pnt);
while( *pnt && (*pnt == ' ' || *pnt == '\t')) pnt++;
if(! *pnt ) return;
if( *pnt == '#' ) return;
/*
* Now categorize the next token.
*/
tok = tok_unknown;
if (strncmp(pnt, "mainmenu_name", 13) == 0)
{
tok = tok_menuname;
pnt += 13;
}
else if (strncmp(pnt, "source", 6) == 0)
{
pnt += 7;
pnt = skip_whitespace(pnt);
do_source(pnt);
return;
}
else if (strncmp(pnt, "mainmenu_option", 15) == 0)
{
menus_seen++;
tok = tok_menuoption;
pnt += 15;
}
else if (strncmp(pnt, "$MAKE ", 6) == 0)
{
tok = tok_make;
}
else if (strncmp(pnt, "comment", 7) == 0)
{
tok = tok_comment;
pnt += 7;
}
else if (strncmp(pnt, "choice", 6) == 0)
{
tok = tok_choose;
pnt += 6;
}
else if (strncmp(pnt, "define_bool", 11) == 0)
{
tok = tok_define;
pnt += 11;
}
else if (strncmp(pnt, "bool", 4) == 0)
{
tok = tok_bool;
pnt += 4;
}
else if (strncmp(pnt, "tristate", 8) == 0)
{
tok = tok_tristate;
pnt += 8;
}
else if (strncmp(pnt, "dep_tristate", 12) == 0)
{
tok = tok_dep_tristate;
pnt += 12;
}
else if (strncmp(pnt, "int", 3) == 0)
{
tok = tok_int;
pnt += 3;
}
else if (strncmp(pnt, "hex", 3) == 0)
{
tok = tok_hex;
pnt += 3;
}
else if (strncmp(pnt, "if", 2) == 0)
{
tok = tok_if;
pnt += 2;
}
else if (strncmp(pnt, "else", 4) == 0)
{
tok = tok_else;
pnt += 4;
}
else if (strncmp(pnt, "fi", 2) == 0)
{
tok = tok_fi;
pnt += 2;
}
else if (strncmp(pnt, "endmenu", 7) == 0)
{
tok = tok_endmenu;
pnt += 7;
}
if( tok == tok_unknown)
{
if( clast != NULL && clast->tok == tok_if
&& strcmp(pnt,"then") == 0) return;
if( current_file != NULL )
fprintf(stderr, "unknown command=%s(%s %d)\n", pnt,
current_file, lineno);
else
fprintf(stderr, "unknown command=%s(%d)\n", pnt,lineno);
return;
}
/*
* Allocate memory for this item, and attach it to the end of the linked
* list.
*/
kcfg = (struct kconfig *) malloc(sizeof(struct kconfig));
memset(kcfg, 0, sizeof(struct kconfig));
kcfg->tok = tok;
if( clast != NULL )
{
clast->next = kcfg;
clast = kcfg;
}
else
{
clast = config = kcfg;
}
pnt = skip_whitespace(pnt);
/*
* Now parse the remaining parts of the option, and attach the results
* to the structure.
*/
switch (tok)
{
case tok_choose:
pnt = get_qstring(pnt, &kcfg->label);
pnt = get_qstring(pnt, &kcfg->optionname);
pnt = get_string(pnt, &kcfg->value);
/*
* Now we need to break apart the individual options into their
* own configuration structures.
*/
parse_choices(kcfg, kcfg->optionname);
free(kcfg->optionname);
sprintf(tmpbuf, "tmpvar_%d", choose_number++);
kcfg->optionname = strdup(tmpbuf);
break;
case tok_define:
pnt = get_string(pnt, &kcfg->optionname);
if(*pnt == 'y' || *pnt == 'Y' ) kcfg->value = "1";
if(*pnt == 'n' || *pnt == 'N' ) kcfg->value = "0";
if(*pnt == 'm' || *pnt == 'M' ) kcfg->value = "2";
break;
case tok_menuname:
pnt = get_qstring(pnt, &kcfg->label);
break;
case tok_bool:
case tok_tristate:
pnt = get_qstring(pnt, &kcfg->label);
pnt = get_string(pnt, &kcfg->optionname);
break;
case tok_int:
case tok_hex:
pnt = get_qstring(pnt, &kcfg->label);
pnt = get_string(pnt, &kcfg->optionname);
pnt = get_string(pnt, &kcfg->value);
break;
case tok_dep_tristate:
pnt = get_qstring(pnt, &kcfg->label);
pnt = get_string(pnt, &kcfg->optionname);
pnt = skip_whitespace(pnt);
if( *pnt == '$') pnt++;
pnt = get_string(pnt, &kcfg->depend.str);
/*
* Create a conditional for this object's dependency.
*
* We can't use "!= n" because this is internally converted to "!= 0"
* and if UMSDOS depends on MSDOS which depends on FAT, then when FAT
* is disabled MSDOS has 16 added to its value, making UMSDOS fully
* available. Whew.
*
* This is more of a hack than a fix. Nested "if" conditionals are
* probably affected too - that +/- 16 affects things in too many
* places. But this should do for now.
*/
sprintf(fake_if,"[ \"$%s\" = \"y\" -o \"$%s\" = \"m\" ]; then",
kcfg->depend.str,kcfg->depend.str);
kcfg->cond = parse_if(fake_if);
if(kcfg->cond == NULL )
{
exit(1);
}
break;
case tok_comment:
pnt = get_qstring(pnt, &kcfg->label);
if( koption != NULL )
{
pnt = get_qstring(pnt, &kcfg->label);
koption->label = kcfg->label;
koption = NULL;
}
break;
case tok_menuoption:
if( strncmp(pnt, "next_comment", 12) == 0)
{
koption = kcfg;
}
else
{
pnt = get_qstring(pnt, &kcfg->label);
}
break;
case tok_make:
kcfg->value=strdup(pnt);
break;
case tok_else:
case tok_fi:
case tok_endmenu:
break;
case tok_if:
/*
* Conditionals are different. For the first level parse, only
* tok_if and tok_dep_tristate items have a ->cond chain attached.
*/
kcfg->cond = parse_if(pnt);
if(kcfg->cond == NULL )
{
exit(1);
}
break;
default:
exit(0);
}
return;
}
