constraints.c

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#include <etsi_its_cpm_ts_coding/asn_internal.h>
#include <etsi_its_cpm_ts_coding/constraints.h>
 
int
asn_generic_no_constraint(const asn_TYPE_descriptor_t *type_descriptor,
                          const void *struct_ptr,
                          asn_app_constraint_failed_f *cb, void *key) {
    (void)type_descriptor;      /* Unused argument */
        (void)struct_ptr;       /* Unused argument */
        (void)cb;       /* Unused argument */
        (void)key;      /* Unused argument */
 
        /* Nothing to check */
        return 0;
}
 
int
asn_generic_unknown_constraint(const asn_TYPE_descriptor_t *type_descriptor,
                               const void *struct_ptr,
                               asn_app_constraint_failed_f *cb, void *key) {
    (void)type_descriptor;      /* Unused argument */
        (void)struct_ptr;       /* Unused argument */
        (void)cb;       /* Unused argument */
        (void)key;      /* Unused argument */
 
        /* Unknown how to check */
        return 0;
}
 
struct errbufDesc {
    const asn_TYPE_descriptor_t *failed_type;
    const void *failed_struct_ptr;
        char *errbuf;
        size_t errlen;
};
 
static void
CC_PRINTFLIKE(4, 5)
_asn_i_ctfailcb(void *key, const asn_TYPE_descriptor_t *td, const void *sptr,
                const char *fmt, ...) {
    struct errbufDesc *arg = key;
        va_list ap;
        ssize_t vlen;
        ssize_t maxlen;
 
        arg->failed_type = td;
        arg->failed_struct_ptr = sptr;
 
        maxlen = arg->errlen;
        if(maxlen <= 0)
                return;
 
        va_start(ap, fmt);
        vlen = vsnprintf(arg->errbuf, maxlen, fmt, ap);
        va_end(ap);
        if(vlen >= maxlen) {
                arg->errbuf[maxlen-1] = '\0';   /* Ensuring libc correctness */
                arg->errlen = maxlen - 1;       /* Not counting termination */
                return;
        } else if(vlen >= 0) {
                arg->errbuf[vlen] = '\0';       /* Ensuring libc correctness */
                arg->errlen = vlen;             /* Not counting termination */
        } else {
                /*
                 * The libc on this system is broken.
                 */
                vlen = sizeof("<broken vsnprintf>") - 1;
                maxlen--;
                arg->errlen = vlen < maxlen ? vlen : maxlen;
                memcpy(arg->errbuf, "<broken vsnprintf>", arg->errlen);
                arg->errbuf[arg->errlen] = 0;
        }
 
        return;
}
 
int
asn_check_constraints(const asn_TYPE_descriptor_t *type_descriptor,
                      const void *struct_ptr, char *errbuf, size_t *errlen) {
    struct errbufDesc arg;
    int ret;
 
    arg.failed_type = 0;
    arg.failed_struct_ptr = 0;
    arg.errbuf = errbuf;
    arg.errlen = errlen ? *errlen : 0;
 
    ret = type_descriptor->encoding_constraints.general_constraints(
        type_descriptor, struct_ptr, _asn_i_ctfailcb, &arg);
    if(ret == -1 && errlen) *errlen = arg.errlen;
 
    return ret;
}