REAL type support, including -fnative-types
git-svn-id: https://asn1c.svn.sourceforge.net/svnroot/asn1c/trunk@319 59561ff5-6e30-0410-9f3c-9617f08c8826
diff --git a/skeletons/NativeReal.c b/skeletons/NativeReal.c
new file mode 100644
index 0000000..e7cc28f
--- /dev/null
+++ b/skeletons/NativeReal.c
@@ -0,0 +1,191 @@
+/*-
+ * Copyright (c) 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+/*
+ * Please read the NativeReal.h for the explanation wrt. differences between
+ * REAL and NativeReal.
+ * Basically, both are decoders and encoders of ASN.1 REAL type, but this
+ * implementation deals with the standard (machine-specific) representation
+ * of them instead of using the platform-independent buffer.
+ */
+#include <NativeReal.h>
+#include <INTEGER.h>
+#include <REAL.h>
+#include <assert.h>
+
+/*
+ * NativeReal basic type description.
+ */
+static ber_tlv_tag_t asn1_DEF_NativeReal_tags[] = {
+ (ASN_TAG_CLASS_UNIVERSAL | (9 << 2))
+};
+asn1_TYPE_descriptor_t asn1_DEF_NativeReal = {
+ "REAL", /* The ASN.1 type is still REAL */
+ asn_generic_no_constraint,
+ NativeReal_decode_ber,
+ NativeReal_encode_der,
+ NativeReal_print,
+ NativeReal_free,
+ 0, /* Use generic outmost tag fetcher */
+ asn1_DEF_NativeReal_tags,
+ sizeof(asn1_DEF_NativeReal_tags) / sizeof(asn1_DEF_NativeReal_tags[0]),
+ asn1_DEF_NativeReal_tags, /* Same as above */
+ sizeof(asn1_DEF_NativeReal_tags) / sizeof(asn1_DEF_NativeReal_tags[0]),
+ 0, /* Always in primitive form */
+ 0, 0, /* No members */
+ 0 /* No specifics */
+};
+
+/*
+ * Decode REAL type.
+ */
+ber_dec_rval_t
+NativeReal_decode_ber(asn1_TYPE_descriptor_t *td,
+ void **dbl_ptr, void *buf_ptr, size_t size, int tag_mode) {
+ double *Dbl = (double *)*dbl_ptr;
+ ber_dec_rval_t rval;
+ ber_dec_ctx_t ctx = { 0, 0, 0, 0 };
+ ber_tlv_len_t length;
+
+ /*
+ * If the structure is not there, allocate it.
+ */
+ if(Dbl == NULL) {
+ (void *)Dbl = *dbl_ptr = CALLOC(1, sizeof(*Dbl));
+ if(Dbl == NULL) {
+ rval.code = RC_FAIL;
+ rval.consumed = 0;
+ return rval;
+ }
+ }
+
+ ASN_DEBUG("Decoding %s as REAL (tm=%d)",
+ td->name, tag_mode);
+
+ /*
+ * Check tags.
+ */
+ rval = ber_check_tags(td, &ctx,
+ buf_ptr, size, tag_mode, &length, 0);
+ if(rval.code != RC_OK)
+ return rval;
+
+ ASN_DEBUG("%s length is %d bytes", td->name, (int)length);
+
+ /*
+ * Make sure we have this length.
+ */
+ buf_ptr = ((char *)buf_ptr) + rval.consumed;
+ size -= rval.consumed;
+ if(length > (ber_tlv_len_t)size) {
+ rval.code = RC_WMORE;
+ rval.consumed = 0;
+ return rval;
+ }
+
+ /*
+ * ASN.1 encoded REAL: buf_ptr, length
+ * Fill the Dbl, at the same time checking for overflow.
+ * If overflow occured, return with RC_FAIL.
+ */
+ {
+ REAL_t tmp;
+ double d;
+ tmp.buf = (uint8_t *)buf_ptr;
+ tmp.size = length;
+
+ if(asn1_REAL2double(&tmp, &d)) {
+ rval.code = RC_FAIL;
+ rval.consumed = 0;
+ return rval;
+ }
+
+ *Dbl = d;
+ }
+
+ rval.code = RC_OK;
+ rval.consumed += length;
+
+ ASN_DEBUG("Took %ld/%ld bytes to encode %s (%d)",
+ (long)rval.consumed, (long)length, td->name, *Dbl);
+
+ return rval;
+}
+
+/*
+ * Encode the NativeReal using the standard REAL type DER encoder.
+ */
+der_enc_rval_t
+NativeReal_encode_der(asn1_TYPE_descriptor_t *td, void *ptr,
+ int tag_mode, ber_tlv_tag_t tag,
+ asn_app_consume_bytes_f *cb, void *app_key) {
+ double Dbl = *(const double *)ptr;
+ der_enc_rval_t erval;
+ REAL_t tmp;
+
+ if(asn1_double2REAL(&tmp, Dbl)) {
+ erval.encoded = -1;
+ erval.failed_type = td;
+ erval.structure_ptr = ptr;
+ return erval;
+ }
+
+ /* Encode fake REAL */
+ erval = INTEGER_encode_der(td, &tmp, tag_mode, tag, cb, app_key);
+ if(erval.encoded == -1) {
+ assert(erval.structure_ptr == &tmp);
+ erval.structure_ptr = ptr;
+ }
+ return erval;
+}
+
+/*
+ * REAL specific human-readable output.
+ */
+int
+NativeReal_print(asn1_TYPE_descriptor_t *td, const void *sptr, int ilevel,
+ asn_app_consume_bytes_f *cb, void *app_key) {
+ const double *Dbl = (const double *)sptr;
+ char scratch[64];
+ int ret;
+
+ (void)td; /* Unused argument */
+ (void)ilevel; /* Unused argument */
+
+ if(Dbl) {
+ char *p = scratch;
+ int buf_size = sizeof(scratch);
+ for(;;) {
+ ret = snprintf(p, buf_size, "%f", *Dbl);
+ if(ret >= 0 && ret < buf_size) {
+ ret = cb(p, ret, app_key);
+ if(p != scratch) free(p);
+ return ret;
+ } else {
+ if(p != scratch) free(p);
+ }
+ if(ret < 0) buf_size <<= 2; /* Old libc. */
+ else buf_size = ret + 1;
+ (void *)p = MALLOC(ret);
+ if(!p) return -1;
+ }
+ } else {
+ return cb("<absent>", 8, app_key);
+ }
+}
+
+void
+NativeReal_free(asn1_TYPE_descriptor_t *td, void *ptr, int contents_only) {
+
+ if(!td || !ptr)
+ return;
+
+ ASN_DEBUG("Freeing %s as REAL (%d, %p, Native)",
+ td->name, contents_only, ptr);
+
+ if(!contents_only) {
+ FREEMEM(ptr);
+ }
+}
+