* UCW Library -- Configuration files: interpreter
*
* (c) 2001--2006 Robert Spalek <robert@ucw.cz>
- * (c) 2003--2006 Martin Mares <mj@ucw.cz>
+ * (c) 2003--2012 Martin Mares <mj@ucw.cz>
*
* This software may be freely distributed and used according to the terms
* of the GNU Lesser General Public License.
return NULL;
}
-#define MAX_STACK_SIZE 10
-static struct item_stack {
- struct cf_section *sec; // nested section
- void *base_ptr; // because original pointers are often relative
- enum cf_operation op; // it is performed when a closing brace is encountered
- void *list; // list the operations should be done on
- u32 mask; // bit array of selectors searching in a list
- struct cf_item *item; // cf_item of the list
-} stack[MAX_STACK_SIZE];
-static uns level;
-
static char *
-opening_brace(struct cf_item *item, void *ptr, enum cf_operation op)
+opening_brace(struct cf_context *cc, struct cf_item *item, void *ptr, enum cf_operation op)
{
- if (level >= MAX_STACK_SIZE-1)
+ if (cc->stack_level >= MAX_STACK_SIZE-1)
return "Too many nested sections";
enum cf_operation pure_op = op & OP_MASK;
- stack[++level] = (struct item_stack) {
+ cc->stack[++cc->stack_level] = (struct item_stack) {
.sec = NULL,
.base_ptr = NULL,
.op = pure_op,
};
if (!item) // unknown is ignored; we just need to trace recursion
return NULL;
- stack[level].sec = item->u.sec;
+ cc->stack[cc->stack_level].sec = item->u.sec;
if (item->cls == CC_SECTION)
{
if (pure_op != OP_SET)
return "Only SET operation can be used with a section";
- stack[level].base_ptr = ptr;
- stack[level].op = OP_EDIT | OP_2ND; // this list operation does nothing
+ cc->stack[cc->stack_level].base_ptr = ptr;
+ cc->stack[cc->stack_level].op = OP_EDIT | OP_2ND; // this list operation does nothing
}
else if (item->cls == CC_LIST)
{
- stack[level].base_ptr = cf_malloc(item->u.sec->size);
- cf_init_section(item->name, item->u.sec, stack[level].base_ptr, 1);
- stack[level].list = ptr;
- stack[level].item = item;
+ cc->stack[cc->stack_level].base_ptr = cf_malloc(item->u.sec->size);
+ cf_init_section(item->name, item->u.sec, cc->stack[cc->stack_level].base_ptr, 1);
+ cc->stack[cc->stack_level].list = ptr;
+ cc->stack[cc->stack_level].item = item;
if (pure_op == OP_ALL)
return "Operation ALL cannot be applied on lists";
else if (pure_op < OP_REMOVE) {
- add_to_list(ptr, stack[level].base_ptr, pure_op);
- stack[level].op |= OP_2ND;
+ add_to_list(ptr, cc->stack[cc->stack_level].base_ptr, pure_op);
+ cc->stack[cc->stack_level].op |= OP_2ND;
} else
- stack[level].op |= OP_1ST;
+ cc->stack[cc->stack_level].op |= OP_1ST;
}
else
return "Opening brace can only be used on sections and lists";
}
static char *
-closing_brace(struct item_stack *st, enum cf_operation op, int number, char **pars)
+closing_brace(struct cf_context *cc, struct item_stack *st, enum cf_operation op, int number, char **pars)
{
if (st->op == OP_CLOSE) // top-level
return "Unmatched } parenthesis";
if (!st->sec) { // dummy run on unknown section
if (!(op & OP_OPEN))
- level--;
+ cc->stack_level--;
return NULL;
}
enum cf_operation pure_op = st->op & OP_MASK;
}
add_to_list(st->list, st->base_ptr, pure_op);
}
- level--;
+ cc->stack_level--;
if (number)
return "No parameters expected after the }";
else if (op & OP_OPEN)
static struct cf_item *
find_item(struct cf_section *curr_sec, const char *name, char **msg, void **ptr)
{
+ struct cf_context *cc = cf_get_context();
*msg = NULL;
if (name[0] == '^') // absolute name instead of relative
- name++, curr_sec = &cf_sections, *ptr = NULL;
+ name++, curr_sec = &cc->sections, *ptr = NULL;
if (!curr_sec) // don't even search in an unknown section
return NULL;
while (1)
{
- if (curr_sec != &cf_sections)
+ if (curr_sec != &cc->sections)
cf_add_dirty(curr_sec, *ptr);
char *c = strchr(name, '.');
if (c)
}
char *
-cf_interpret_line(char *name, enum cf_operation op, int number, char **pars)
+cf_interpret_line(struct cf_context *cc, char *name, enum cf_operation op, int number, char **pars)
{
char *msg;
if ((op & OP_MASK) == OP_CLOSE)
- return closing_brace(stack+level, op, number, pars);
- void *ptr = stack[level].base_ptr;
- struct cf_item *item = find_item(stack[level].sec, name, &msg, &ptr);
+ return closing_brace(cc, cc->stack+cc->stack_level, op, number, pars);
+ void *ptr = cc->stack[cc->stack_level].base_ptr;
+ struct cf_item *item = find_item(cc->stack[cc->stack_level].sec, name, &msg, &ptr);
if (msg)
return msg;
- if (stack[level].op & OP_1ST)
- TRY( record_selector(item, stack[level].sec, &stack[level].mask) );
+ if (cc->stack[cc->stack_level].op & OP_1ST)
+ TRY( record_selector(item, cc->stack[cc->stack_level].sec, &cc->stack[cc->stack_level].mask) );
if (op & OP_OPEN) { // the operation will be performed after the closing brace
if (number)
return "Cannot open a block after a parameter has been passed on a line";
- return opening_brace(item, ptr, op);
+ return opening_brace(cc, item, ptr, op);
}
if (!item) // ignored item in an unknown section
return NULL;
char *
cf_find_item(const char *name, struct cf_item *item)
{
+ struct cf_context *cc = cf_get_context();
char *msg;
void *ptr = NULL;
- struct cf_item *ci = find_item(&cf_sections, name, &msg, &ptr);
+ struct cf_item *ci = find_item(&cc->sections, name, &msg, &ptr);
if (msg)
return msg;
if (ci) {
}
void
-cf_init_stack(void)
+cf_init_stack(struct cf_context *cc)
{
- static uns initialized = 0;
- if (!initialized++) {
- cf_sections.flags |= SEC_FLAG_UNKNOWN;
- cf_sections.size = 0; // size of allocated array used to be stored here
- cf_init_section(NULL, &cf_sections, NULL, 0);
+ if (!cc->initialized++) {
+ cc->sections.flags |= SEC_FLAG_UNKNOWN;
+ cc->sections.size = 0; // size of allocated array used to be stored here
+ cf_init_section(NULL, &cc->sections, NULL, 0);
}
- level = 0;
- stack[0] = (struct item_stack) {
- .sec = &cf_sections,
+ cc->stack_level = 0;
+ cc->stack[0] = (struct item_stack) {
+ .sec = &cc->sections,
.base_ptr = NULL,
.op = OP_CLOSE,
.list = NULL,
}
int
-cf_check_stack(void)
+cf_check_stack(struct cf_context *cc)
{
- if (level > 0) {
+ if (cc->stack_level > 0) {
msg(L_ERROR, "Unterminated block");
return 1;
}
return 0;
}
-
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