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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include "asn1parser.h"
/*
* Construct a new empty types collection.
*/
asn1p_expr_t *
asn1p_expr_new(int _lineno) {
asn1p_expr_t *expr;
expr = calloc(1, sizeof *expr);
if(expr) {
TQ_INIT(&(expr->members));
expr->_lineno = _lineno;
}
return expr;
}
asn1p_expr_t *
asn1p_expr_clone(asn1p_expr_t *expr, int skip_extensions) {
asn1p_expr_t *clone;
asn1p_expr_t *tcmemb; /* Child of tc */
int hit_ext = 0;
clone = asn1p_expr_new(expr->_lineno);
if(clone == NULL) return NULL;
#define CLCOPY(field) do { clone->field = expr->field; } while(0)
#define CLCLONE(field, func) do { if(expr->field) { \
clone->field = func(expr->field); \
if(clone->field == NULL) { \
asn1p_expr_free(clone); \
return NULL; \
} \
} } while(0)
/*
* Copy simple fields.
*/
CLCOPY(meta_type);
CLCOPY(expr_type);
CLCOPY(tag);
CLCOPY(marker.flags); /* OPTIONAL/DEFAULT */
CLCOPY(module);
CLCOPY(_mark);
clone->data = 0; /* Do not clone this */
clone->data_free = 0; /* Do not clone this */
/*
* Clone complex fields.
*/
CLCLONE(Identifier, strdup);
CLCLONE(reference, asn1p_ref_clone);
CLCLONE(constraints, asn1p_constraint_clone);
CLCLONE(combined_constraints, asn1p_constraint_clone);
CLCLONE(params, asn1p_paramlist_clone);
CLCLONE(value, asn1p_value_clone);
CLCLONE(marker.default_value, asn1p_value_clone);
CLCLONE(with_syntax, asn1p_wsyntx_clone);
/*
* Copy all the children of this expr.
*/
TQ_FOR(tcmemb, &(expr->members), next) {
asn1p_expr_t *cmemb;
if(skip_extensions
&& tcmemb->expr_type == A1TC_EXTENSIBLE) {
hit_ext++; /* Even if hit_ext wraps around, we're OK. */
continue;
}
if(hit_ext == 1) continue; /* Skip between ...'s */
cmemb = asn1p_expr_clone(tcmemb, skip_extensions);
if(cmemb == NULL) {
asn1p_expr_free(clone);
return NULL;
}
asn1p_expr_add(clone, cmemb);
}
return clone;
}
/*
* Add expression as a member of another.
*/
void
asn1p_expr_add(asn1p_expr_t *to, asn1p_expr_t *what) {
TQ_ADD(&(to->members), what, next);
what->parent_expr = to;
}
/*
* Destruct the types collection structure.
*/
void
asn1p_expr_free(asn1p_expr_t *expr) {
if(expr) {
asn1p_expr_t *tm;
/* Remove all children */
while((tm = TQ_REMOVE(&(expr->members), next))) {
if(tm->parent_expr != expr)
printf("<%s:%p !-> %s:%p>\n",
tm->Identifier, tm->parent_expr,
expr->Identifier, expr);
assert(tm->parent_expr == expr);
asn1p_expr_free(tm);
}
if(expr->Identifier)
free(expr->Identifier);
if(expr->reference)
asn1p_ref_free(expr->reference);
if(expr->constraints)
asn1p_constraint_free(expr->constraints);
if(expr->combined_constraints)
asn1p_constraint_free(expr->combined_constraints);
if(expr->params)
asn1p_paramlist_free(expr->params);
if(expr->value)
asn1p_value_free(expr->value);
if(expr->marker.default_value)
asn1p_value_free(expr->marker.default_value);
if(expr->with_syntax)
asn1p_wsyntx_free(expr->with_syntax);
if(expr->data && expr->data_free)
expr->data_free(expr->data);
memset(expr, 0, sizeof(*expr));
free(expr);
}
}
char *asn1p_tag2string(struct asn1p_type_tag_s *tag, char *buf) {
static char buf_stat[TAG2STRING_BUFFER_SIZE];
char *start;
char *end;
if(!buf) buf = buf_stat;
start = buf;
end = buf + TAG2STRING_BUFFER_SIZE;
if(tag->tag_class == TC_NOCLASS) {
*buf = 0;
return buf;
}
strcpy(buf, "[");
switch(tag->tag_class) {
case TC_NOCLASS:
assert(tag->tag_class != TC_NOCLASS);
break;
case TC_UNIVERSAL: strcat(buf, "UNIVERSAL "); break;
case TC_PRIVATE: strcat(buf, "PRIVATE "); break;
case TC_APPLICATION: strcat(buf, "APPLICATION "); break;
case TC_CONTEXT_SPECIFIC:
break;
}
buf += snprintf(buf + strlen(buf), end - buf,
"%" PRIdASN "]", tag->tag_value);
assert((unsigned int)(buf - end) > sizeof(" IMPLICIT "));
switch(tag->tag_mode) {
case TM_DEFAULT: break;
case TM_IMPLICIT: strcat(buf, " IMPLICIT"); break;
case TM_EXPLICIT: strcat(buf, " EXPLICIT"); break;
}
return start;
}
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