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NetBSD/usr.sbin/config/specfile.c
glass fea6b7920f Welcome to the new order. config(8)'s code for reading files, files.i386, 
and files.kernel has now been completely replaced.
features supported: not nearly as broken as the stuff before
		    expression support for dependencies
		    support for 'requires'
		    no longer generates lots of stupid unnecessary .h files
		    broke lots of broken stuff, and forced fixing it.
(docs to arrive later)
		    added '-k' option for continue even after error
		    documented '-g'
1993-04-10 12:11:55 +00:00

549 lines
12 KiB
C
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#include <stdio.h>
#include <ctype.h>
#include <setjmp.h>
#include "y.tab.h"
#include "config.h"
#define T_OPTIONAL 1
#define T_STANDARD 2
#define T_COMPILE_WITH 3
#define T_CONFIG_DEPENDENT 4
#define T_DEVICE_DRIVER 5
#define T_PROFILING_ROUTINE 6
#define T_IDENTIFIER 7
#define T_OR 8
#define T_REQUIRES 9
#define T_NOT 10
#define EXPR_GROUP 11
#define T_LEFTPAREN 12
#define T_RIGHTPAREN 13
#define is_paren(x) ((x == '(') || (x == ')'))
struct file_keyword {
char *key;
int token;
} file_kw_table[] = {
"compile-with", T_COMPILE_WITH,
"config-dependent", T_CONFIG_DEPENDENT,
"device-driver", T_DEVICE_DRIVER,
"optional", T_OPTIONAL,
"or", T_OR,
"not", T_NOT,
"requires", T_REQUIRES,
"standard", T_STANDARD
};
extern struct file_list *fltail_lookup(),*new_fent(),*fl_lookup();
static char *current_file;
static int current_line;
static jmp_buf parse_problem;
int file_tok(token)
char *token;
{
int i, length;
if (is_paren(*token))
return (*token == '(' ? T_LEFTPAREN : T_RIGHTPAREN);
for (i =0; i <(sizeof(file_kw_table)/sizeof(file_kw_table[0])); i++) {
if (!strcmp(file_kw_table[i].key, token))
return file_kw_table[i].token;
}
length = strlen(token);
for (i = 0; i < length; i++) {
if (!isalnum(token[i]) && (token[i] != '_') &&
(token[i] != '-')) return -1;
}
return T_IDENTIFIER;
}
struct name_expr {
int type;
char *name;
struct name_expr *next,*left,*right;
};
struct name_expr *
alloc_name_expr(name)
char *name;
{
struct name_expr *new;
int token,type;
type = 0;
token = file_tok(name);
switch (token) {
case T_OR:
case T_NOT:
case T_IDENTIFIER:
case T_LEFTPAREN:
case T_RIGHTPAREN:
type = token;
break;
default: return NULL;
}
new = malloc(sizeof(struct name_expr));
new->type = type;
if (type == T_IDENTIFIER) new->name = ns(name);
else new->name = NULL;
new->left = new->right = new->next = NULL;
return new;
}
void parse_err(char *emessage)
{
fprintf(stderr, "%s:%d: %s\n", current_file, current_line, emessage);
if (!fatal_errors) longjmp(parse_problem,1);
exit(1);
}
delete_expr(expr)
struct name_expr *expr;
{
if (expr->type == T_IDENTIFIER)
free(expr->name);
free(expr);
}
struct name_expr *yank_node(expr)
struct name_expr **expr;
{
struct name_expr *node;
if (*expr == NULL) return NULL;
node = *expr;
*expr = (*expr)->next;
return node;
}
struct name_expr *yank_expr(expr)
struct name_expr **expr;
{
struct name_expr *node,*tail, *subexpr,*next;
node = yank_node(expr);
if (node == NULL) return NULL;
if (node->type == T_LEFTPAREN)
for (tail = subexpr = NULL;;) {
next = yank_expr(expr);
if (!next) parse_err("missing ')'");
if (next->type == T_RIGHTPAREN) {
if (subexpr == NULL)
parse_err("empty inner expression i.e '()' ");
node->left = subexpr;
node->type = EXPR_GROUP;
break;
} else {
if (subexpr == NULL)
tail = subexpr = next;
else {
tail->next = next;
tail = next;
}
tail->next = NULL;
}
}
return(node);
}
struct name_expr *
paren_squish(tree)
struct name_expr *tree;
{
struct name_expr *result,*expr,*tail;
result = tail = NULL;
while ((expr = yank_expr(&tree)) != NULL) {
if (expr->type == T_RIGHTPAREN)
parse_err("unexpected ')'");
if (result == NULL) {
tail = result = expr;
}
else {
tail->next = expr;
tail = expr;
}
tail->next = NULL;
}
return(result);
}
struct name_expr *
not_squish(tree)
struct name_expr *tree;
{
struct name_expr *result,*next,*tail,*node;
tail = result = next = NULL;
while ((next = yank_node(&tree)) != NULL) {
if (next->type == EXPR_GROUP)
next->left = not_squish(next->left);
if (next->type == T_NOT) {
int notlevel = 1;
node = yank_node(&tree);
while (node->type == T_NOT) {
++notlevel;
node = yank_node(&tree);
}
if (node == NULL)
parse_err("no expression following 'not'");
if (node->type == T_OR)
parse_err("nothing between 'not' and 'or'");
if (notlevel % 2 != 1)
next = node;
else
next->left = node;
}
/* add the node to our result plan */
if (result == NULL)
tail = result = next;
else {
tail->next = next;
tail = next;
}
tail->next = NULL;
}
return(result);
}
struct name_expr *
or_squish(tree)
struct name_expr *tree;
{
struct name_expr *next, *tail,*result;
tail = result = next = NULL;
while ((next = yank_node(&tree)) != NULL) {
if (next->type == EXPR_GROUP)
next->left = or_squish(next->left);
if (next->type == T_NOT)
next->left = or_squish(next->left);
if (next->type == T_OR) {
if (result == NULL)
parse_err("no expression before 'or'");
next->left = result;
next->right = or_squish(tree);
if (next->right == NULL)
parse_err("no expression after 'or'");
next->next = NULL;
return(next);
}
/* add the node to our result plan */
if (result == NULL)
tail = result = next;
else {
tail->next = next;
tail = next;
}
tail->next = NULL;
}
return(result);
}
struct name_expr *
parse_name_expr(fp,seed, read_ahead)
FILE *fp;
char *seed, **read_ahead;
{
struct name_expr *list, *tail,*new,*current;
char *str;
list = NULL;
*read_ahead = NULL;
if (seed) {
list = alloc_name_expr(seed);
if (list == NULL) {
*read_ahead = seed;
return NULL;
}
}
tail = list;
for (;;) {
str = get_word(fp);
if ((str == (char *)EOF) || str == NULL) {
*read_ahead = str;
break;
}
new = alloc_name_expr(str);
if (!new) {
*read_ahead = str;
break;
}
if (tail) tail->next = new;
else {
list = new;
}
tail = new;
}
list = paren_squish(list);
list = not_squish(list);
list = or_squish(list);
return list;
}
int is_simple(expr)
struct name_expr *expr;
{
return expr->type == T_IDENTIFIER;
}
int f_not(expr,explain)
struct name_expr *expr;
int explain;
{
int result;
result = !depend_check(expr->left,explain);
return result;
}
int f_or(expr,explain)
struct name_expr *expr;
int explain;
{
int result;
if (depend_check(expr->left,explain))
return 1;
if (depend_check(expr->right,explain))
return 1;
return 0;
}
int f_identifier(expr,explain)
struct name_expr *expr;
int explain;
{
struct opt *op;
struct device *dp;
for (op = opt; op != 0; op = op->op_next)
if (opteq(op->op_name, expr->name)) return 1;
for (dp = dtab; dp != 0; dp = dp->d_next)
if (eq(dp->d_name, expr->name)) return 1;
return 0;
}
print_expr(expr)
struct name_expr *expr;
{
struct name_expr *current;
for (current = expr; current != NULL; current= current->next) {
switch (current->type) {
case T_NOT:
fprintf (stderr, "not ");
print_expr(current->left);
break;
case T_OR:
print_expr(current->left);
fprintf (stderr, "or ");
print_expr(current->right);
break;
case EXPR_GROUP:
fprintf (stderr, "(");
print_expr(current->left);
fprintf (stderr, ")");
break;
case T_IDENTIFIER:
fprintf(stderr,"%s ", current->name);
break;
default:
parse_err("unknown expression type");
}
}
}
int depend_check(expr, explain)
struct name_expr *expr;
int explain;
{
struct name_expr *current;
int result;
for (current= expr; current; current= current->next) {
switch(current->type) {
case T_NOT:
result = f_not(current,0);
break;
case T_OR:
result = f_or(current,0);
break;
case EXPR_GROUP:
result = depend_check(current->left, 0);
break;
case T_IDENTIFIER:
result = f_identifier(current,0);
break;
}
if (result) continue;
return 0;
}
return 1;
}
read_file(filename, fatal_on_open, override)
char *filename;
int fatal_on_open, override;
{
FILE *fp;
size_t length;
char ebuf[1024];
fp = fopen(filename, "r");
if (!fp)
if (fatal_on_open) {
perror(filename);
exit(1);
}
else return;
current_line = 0;
current_file = filename;
for (;;) {
char *str, *kf_name, *read_ahead,*compile_with;
extern char *get_word(),*get_quoted_word();
int token, optional,driver,config_depend, is_dup,filetype;
struct name_expr *depends_on,*requires;
struct file_list *tp,*tmp, *fl,*pf;
enum {BEFORE_FILENAME,BEFORE_SPEC,BEFORE_DEPENDS,PAST_DEPENDS,
SPECIALS} parse_state;
if (setjmp(parse_problem)) {
while (1) {
str = get_word(fp);
if (!str || (str == (char *) EOF)) break;
}
if (!str) current_line++;
continue;
}
str = get_word(fp);
current_line++;
if (str == NULL) continue;
if (str == (char *) EOF) break;
if (*str == '#') {
fprintf(stderr, "shouldn't get here");
exit(1);
}
parse_state = BEFORE_FILENAME;
kf_name = read_ahead = compile_with = NULL;
optional= driver = config_depend = filetype =0;
depends_on = requires = NULL;
is_dup = 0;
while ((str != NULL) && (str != (char *)EOF)) {
switch (parse_state) {
case BEFORE_FILENAME: {
kf_name = ns(str);
parse_state = BEFORE_SPEC;
break;
}
case BEFORE_SPEC: {
token = file_tok(str);
if ((token != T_OPTIONAL) && (token != T_STANDARD))
parse_err("unexpected token starts inclusion specification");
optional = (token == T_OPTIONAL);
parse_state = BEFORE_DEPENDS;
break;
}
case BEFORE_DEPENDS: {
depends_on = parse_name_expr(fp,str, &read_ahead);
str = read_ahead;
parse_state = PAST_DEPENDS;
continue;
break;
}
case PAST_DEPENDS:
case SPECIALS:
token = file_tok(str);
switch (token) {
case T_COMPILE_WITH: {
str = get_quoted_word(fp);
if ((str == 0) || (str == (char *) EOF))
parse_err("missing compile command string");
compile_with = ns(str);
}
case T_CONFIG_DEPENDENT: {
config_depend = 1;
break;
}
case T_DEVICE_DRIVER: {
driver = 1;
break;
}
case T_REQUIRES: {
requires = parse_name_expr(fp,NULL, &read_ahead);
if (!requires)
parse_err("'requires' but no expression");
str = read_ahead;
continue;
break;
}
default:
parse_err("unexpected token");
}
break;
default:
parse_err("unknown state");
}
str = get_word(fp);
}
if (parse_state == BEFORE_SPEC)
parse_err("filename, but no specification");
if (!kf_name)
parse_err("no filename specified");
fl = fl_lookup(kf_name);
if (fl && !override) {
(void) sprintf(ebuf, "duplicate file name '%s'", kf_name);
parse_err(ebuf);
}
if ((pf = fl_lookup(kf_name)) &&
(pf->f_type != INVISIBLE || (pf->f_flags | DUPLICATE)))
is_dup = 1;
else
is_dup = 0;
if (override && ((tmp = fltail_lookup(kf_name)) != 0))
fprintf(stderr, "%s:%dLocal file %s overrides %s.\n",
current_file, current_line, kf_name, tmp->f_fn);
if (!optional) {
if (driver)
parse_err("'standard' incompatible with 'device-driver'");
if (depends_on)
parse_err("'standard' can't have dependencies");
}
else if (!depends_on)
parse_err("'optional' requires dependency specification");
if (driver && !is_simple(depends_on))
parse_err("device-driver's must have a singular name");
if (driver && eq("profiling-routine", depends_on->name))
parse_err("not a valid device-driver name");
if (is_simple(depends_on) &&
eq("profiling-routine", depends_on->name)) filetype = PROFILING;
else if (depend_check(depends_on,0)) filetype = NORMAL;
else filetype = INVISIBLE;
if (filetype == NORMAL && requires && !depend_check(requires,0)) {
fprintf(stderr, "%s:%d: requirement expression failed: ",
current_file, current_line);
print_expr(requires);
fprintf(stderr, "\n");
parse_err("requirements not met");
}
tp = new_fent();
tp->f_fn = kf_name;
tp->f_type = filetype;
if (driver)
tp->f_needs = depends_on->name;
else tp->f_needs = NULL; /* memory leak */
tp->f_was_driver = driver;
tp->f_special = compile_with;
tp->f_flags = 0;
tp->f_flags |= (config_depend ? CONFIGDEP : 0);
tp->f_flags |= (is_dup ? DUPLICATE : 0);
}
return;
}
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