2 * Copyright (c) 2004, 2005, 2006 Lev Walkin <vlm@lionet.info>.
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3 * All rights reserved.
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4 * Redistribution and modifications are permitted subject to BSD license.
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7 * Read the NativeInteger.h for the explanation wrt. differences between
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8 * INTEGER and NativeInteger.
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9 * Basically, both are decoders and encoders of ASN.1 INTEGER type, but this
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10 * implementation deals with the standard (machine-specific) representation
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11 * of them instead of using the platform-independent buffer.
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13 #include <asn_internal.h>
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14 #include <NativeInteger.h>
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17 * NativeInteger basic type description.
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19 static const ber_tlv_tag_t asn_DEF_NativeInteger_tags[] = {
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20 (ASN_TAG_CLASS_UNIVERSAL | (2 << 2))
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22 asn_TYPE_operation_t asn_OP_NativeInteger = {
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24 NativeInteger_print,
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25 NativeInteger_compare,
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26 NativeInteger_decode_ber,
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27 NativeInteger_encode_der,
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28 NativeInteger_decode_xer,
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29 NativeInteger_encode_xer,
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30 #ifdef ASN_DISABLE_OER_SUPPORT
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34 NativeInteger_decode_oer, /* OER decoder */
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35 NativeInteger_encode_oer, /* Canonical OER encoder */
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36 #endif /* ASN_DISABLE_OER_SUPPORT */
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37 #ifdef ASN_DISABLE_PER_SUPPORT
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43 NativeInteger_decode_uper, /* Unaligned PER decoder */
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44 NativeInteger_encode_uper, /* Unaligned PER encoder */
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45 NativeInteger_decode_aper, /* Aligned PER decoder */
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46 NativeInteger_encode_aper, /* Aligned PER encoder */
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47 #endif /* ASN_DISABLE_PER_SUPPORT */
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48 NativeInteger_random_fill,
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49 0 /* Use generic outmost tag fetcher */
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51 asn_TYPE_descriptor_t asn_DEF_NativeInteger = {
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52 "INTEGER", /* The ASN.1 type is still INTEGER */
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54 &asn_OP_NativeInteger,
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55 asn_DEF_NativeInteger_tags,
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56 sizeof(asn_DEF_NativeInteger_tags) / sizeof(asn_DEF_NativeInteger_tags[0]),
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57 asn_DEF_NativeInteger_tags, /* Same as above */
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58 sizeof(asn_DEF_NativeInteger_tags) / sizeof(asn_DEF_NativeInteger_tags[0]),
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59 { 0, 0, asn_generic_no_constraint },
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60 0, 0, /* No members */
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61 0 /* No specifics */
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65 * Decode INTEGER type.
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68 NativeInteger_decode_ber(const asn_codec_ctx_t *opt_codec_ctx,
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69 const asn_TYPE_descriptor_t *td, void **nint_ptr,
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70 const void *buf_ptr, size_t size, int tag_mode) {
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71 const asn_INTEGER_specifics_t *specs =
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72 (const asn_INTEGER_specifics_t *)td->specifics;
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73 long *native = (long *)*nint_ptr;
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74 asn_dec_rval_t rval;
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75 ber_tlv_len_t length;
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78 * If the structure is not there, allocate it.
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80 if(native == NULL) {
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81 native = (long *)(*nint_ptr = CALLOC(1, sizeof(*native)));
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82 if(native == NULL) {
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83 rval.code = RC_FAIL;
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89 ASN_DEBUG("Decoding %s as INTEGER (tm=%d)",
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90 td->name, tag_mode);
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95 rval = ber_check_tags(opt_codec_ctx, td, 0, buf_ptr, size,
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96 tag_mode, 0, &length, 0);
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97 if(rval.code != RC_OK)
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100 ASN_DEBUG("%s length is %d bytes", td->name, (int)length);
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103 * Make sure we have this length.
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105 buf_ptr = ((const char *)buf_ptr) + rval.consumed;
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106 size -= rval.consumed;
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107 if(length > (ber_tlv_len_t)size) {
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108 rval.code = RC_WMORE;
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114 * ASN.1 encoded INTEGER: buf_ptr, length
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115 * Fill the native, at the same time checking for overflow.
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116 * If overflow occured, return with RC_FAIL.
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121 const void *constbuf;
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126 unconst_buf.constbuf = buf_ptr;
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127 tmp.buf = (uint8_t *)unconst_buf.nonconstbuf;
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130 if((specs&&specs->field_unsigned)
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131 ? asn_INTEGER2ulong(&tmp, (unsigned long *)&l) /* sic */
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132 : asn_INTEGER2long(&tmp, &l)) {
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133 rval.code = RC_FAIL;
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142 rval.consumed += length;
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144 ASN_DEBUG("Took %ld/%ld bytes to encode %s (%ld)",
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145 (long)rval.consumed, (long)length, td->name, (long)*native);
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151 * Encode the NativeInteger using the standard INTEGER type DER encoder.
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154 NativeInteger_encode_der(const asn_TYPE_descriptor_t *sd, const void *ptr,
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155 int tag_mode, ber_tlv_tag_t tag,
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156 asn_app_consume_bytes_f *cb, void *app_key) {
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157 unsigned long native = *(const unsigned long *)ptr; /* Disable sign ext. */
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158 asn_enc_rval_t erval = {0,0,0};
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161 #ifdef WORDS_BIGENDIAN /* Opportunistic optimization */
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163 tmp.buf = (uint8_t *)&native;
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164 tmp.size = sizeof(native);
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166 #else /* Works even if WORDS_BIGENDIAN is not set where should've been */
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167 uint8_t buf[sizeof(native)];
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170 /* Prepare a fake INTEGER */
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171 for(p = buf + sizeof(buf) - 1; p >= buf; p--, native >>= 8)
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172 *p = (uint8_t)native;
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175 tmp.size = sizeof(buf);
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176 #endif /* WORDS_BIGENDIAN */
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178 /* Encode fake INTEGER */
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179 erval = INTEGER_encode_der(sd, &tmp, tag_mode, tag, cb, app_key);
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180 if(erval.structure_ptr == &tmp) {
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181 erval.structure_ptr = ptr;
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187 * Decode the chunk of XML text encoding INTEGER.
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190 NativeInteger_decode_xer(const asn_codec_ctx_t *opt_codec_ctx,
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191 const asn_TYPE_descriptor_t *td, void **sptr,
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192 const char *opt_mname, const void *buf_ptr,
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194 const asn_INTEGER_specifics_t *specs =
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195 (const asn_INTEGER_specifics_t *)td->specifics;
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196 asn_dec_rval_t rval;
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198 void *st_ptr = (void *)&st;
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199 long *native = (long *)*sptr;
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202 native = (long *)(*sptr = CALLOC(1, sizeof(*native)));
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203 if(!native) ASN__DECODE_FAILED;
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206 memset(&st, 0, sizeof(st));
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207 rval = INTEGER_decode_xer(opt_codec_ctx, td, &st_ptr,
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208 opt_mname, buf_ptr, size);
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209 if(rval.code == RC_OK) {
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211 if((specs&&specs->field_unsigned)
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212 ? asn_INTEGER2ulong(&st, (unsigned long *)&l) /* sic */
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213 : asn_INTEGER2long(&st, &l)) {
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214 rval.code = RC_FAIL;
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221 * Cannot restart from the middle;
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222 * there is no place to save state in the native type.
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223 * Request a continuation from the very beginning.
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227 ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &st);
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233 NativeInteger_encode_xer(const asn_TYPE_descriptor_t *td, const void *sptr,
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234 int ilevel, enum xer_encoder_flags_e flags,
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235 asn_app_consume_bytes_f *cb, void *app_key) {
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236 const asn_INTEGER_specifics_t *specs =
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237 (const asn_INTEGER_specifics_t *)td->specifics;
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238 char scratch[32]; /* Enough for 64-bit int */
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239 asn_enc_rval_t er = {0,0,0};
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240 const long *native = (const long *)sptr;
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245 if(!native) ASN__ENCODE_FAILED;
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247 er.encoded = snprintf(scratch, sizeof(scratch),
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248 (specs && specs->field_unsigned)
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249 ? "%lu" : "%ld", *native);
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250 if(er.encoded <= 0 || (size_t)er.encoded >= sizeof(scratch)
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251 || cb(scratch, er.encoded, app_key) < 0)
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252 ASN__ENCODE_FAILED;
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254 ASN__ENCODED_OK(er);
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257 #ifndef ASN_DISABLE_PER_SUPPORT
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260 NativeInteger_decode_uper(const asn_codec_ctx_t *opt_codec_ctx,
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261 const asn_TYPE_descriptor_t *td,
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262 const asn_per_constraints_t *constraints, void **sptr,
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263 asn_per_data_t *pd) {
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264 const asn_INTEGER_specifics_t *specs =
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265 (const asn_INTEGER_specifics_t *)td->specifics;
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266 asn_dec_rval_t rval;
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267 long *native = (long *)*sptr;
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269 void *tmpintptr = &tmpint;
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271 (void)opt_codec_ctx;
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272 ASN_DEBUG("Decoding NativeInteger %s (UPER)", td->name);
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275 native = (long *)(*sptr = CALLOC(1, sizeof(*native)));
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276 if(!native) ASN__DECODE_FAILED;
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279 memset(&tmpint, 0, sizeof tmpint);
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280 rval = INTEGER_decode_uper(opt_codec_ctx, td, constraints,
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282 if(rval.code == RC_OK) {
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283 if((specs&&specs->field_unsigned)
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284 ? asn_INTEGER2ulong(&tmpint, (unsigned long *)native)
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285 : asn_INTEGER2long(&tmpint, native))
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286 rval.code = RC_FAIL;
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288 ASN_DEBUG("NativeInteger %s got value %ld",
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289 td->name, *native);
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291 ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
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297 NativeInteger_encode_uper(const asn_TYPE_descriptor_t *td,
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298 const asn_per_constraints_t *constraints,
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299 const void *sptr, asn_per_outp_t *po) {
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300 const asn_INTEGER_specifics_t *specs =
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301 (const asn_INTEGER_specifics_t *)td->specifics;
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302 asn_enc_rval_t er = {0,0,0};
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306 if(!sptr) ASN__ENCODE_FAILED;
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308 native = *(const long *)sptr;
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310 ASN_DEBUG("Encoding NativeInteger %s %ld (UPER)", td->name, native);
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312 memset(&tmpint, 0, sizeof(tmpint));
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313 if((specs&&specs->field_unsigned)
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314 ? asn_ulong2INTEGER(&tmpint, native)
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315 : asn_long2INTEGER(&tmpint, native))
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316 ASN__ENCODE_FAILED;
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317 er = INTEGER_encode_uper(td, constraints, &tmpint, po);
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318 ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
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323 NativeInteger_decode_aper(const asn_codec_ctx_t *opt_codec_ctx,
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324 const asn_TYPE_descriptor_t *td,
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325 const asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) {
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327 const asn_INTEGER_specifics_t *specs = (const asn_INTEGER_specifics_t *)td->specifics;
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328 asn_dec_rval_t rval;
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329 long *native = (long *)*sptr;
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331 void *tmpintptr = &tmpint;
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333 (void)opt_codec_ctx;
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334 ASN_DEBUG("Decoding NativeInteger %s (APER)", td->name);
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337 native = (long *)(*sptr = CALLOC(1, sizeof(*native)));
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338 if(!native) ASN__DECODE_FAILED;
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341 memset(&tmpint, 0, sizeof tmpint);
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342 rval = INTEGER_decode_aper(opt_codec_ctx, td, constraints,
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344 if(rval.code == RC_OK) {
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345 if((specs&&specs->field_unsigned)
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346 ? asn_INTEGER2ulong(&tmpint, (unsigned long *)native)
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347 : asn_INTEGER2long(&tmpint, native))
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348 rval.code = RC_FAIL;
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350 ASN_DEBUG("NativeInteger %s got value %ld",
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351 td->name, *native);
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353 ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
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359 NativeInteger_encode_aper(const asn_TYPE_descriptor_t *td,
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360 const asn_per_constraints_t *constraints,
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361 const void *sptr, asn_per_outp_t *po) {
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363 const asn_INTEGER_specifics_t *specs = (const asn_INTEGER_specifics_t *)td->specifics;
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364 asn_enc_rval_t er = {0,0,0};
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368 if(!sptr) ASN__ENCODE_FAILED;
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370 native = *(const long *)sptr;
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372 ASN_DEBUG("Encoding NativeInteger %s %ld (APER)", td->name, native);
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374 memset(&tmpint, 0, sizeof(tmpint));
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375 if((specs&&specs->field_unsigned)
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376 ? asn_ulong2INTEGER(&tmpint, (unsigned long)native)
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377 : asn_long2INTEGER(&tmpint, native))
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378 ASN__ENCODE_FAILED;
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379 er = INTEGER_encode_aper(td, constraints, &tmpint, po);
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380 ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
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384 #endif /* ASN_DISABLE_PER_SUPPORT */
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387 * INTEGER specific human-readable output.
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390 NativeInteger_print(const asn_TYPE_descriptor_t *td, const void *sptr,
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391 int ilevel, asn_app_consume_bytes_f *cb, void *app_key) {
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392 const asn_INTEGER_specifics_t *specs =
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393 (const asn_INTEGER_specifics_t *)td->specifics;
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394 const long *native = (const long *)sptr;
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395 char scratch[32]; /* Enough for 64-bit int */
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398 (void)td; /* Unused argument */
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399 (void)ilevel; /* Unused argument */
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402 long value = *native;
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403 ret = snprintf(scratch, sizeof(scratch),
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404 (specs && specs->field_unsigned) ? "%lu" : "%ld", value);
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405 assert(ret > 0 && (size_t)ret < sizeof(scratch));
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406 if(cb(scratch, ret, app_key) < 0) return -1;
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407 if(specs && (value >= 0 || !specs->field_unsigned)) {
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408 const asn_INTEGER_enum_map_t *el =
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409 INTEGER_map_value2enum(specs, value);
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411 if(cb(" (", 2, app_key) < 0) return -1;
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412 if(cb(el->enum_name, el->enum_len, app_key) < 0) return -1;
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413 if(cb(")", 1, app_key) < 0) return -1;
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418 return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
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423 NativeInteger_free(const asn_TYPE_descriptor_t *td, void *ptr,
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424 enum asn_struct_free_method method) {
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428 ASN_DEBUG("Freeing %s as INTEGER (%d, %p, Native)",
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429 td->name, method, ptr);
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432 case ASFM_FREE_EVERYTHING:
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435 case ASFM_FREE_UNDERLYING:
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437 case ASFM_FREE_UNDERLYING_AND_RESET:
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438 memset(ptr, 0, sizeof(long));
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444 NativeInteger_compare(const asn_TYPE_descriptor_t *td, const void *aptr, const void *bptr) {
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448 const asn_INTEGER_specifics_t *specs =
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449 (const asn_INTEGER_specifics_t *)td->specifics;
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450 if(specs && specs->field_unsigned) {
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451 const unsigned long *a = aptr;
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452 const unsigned long *b = bptr;
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455 } else if(*a > *b) {
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461 const long *a = aptr;
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462 const long *b = bptr;
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465 } else if(*a > *b) {
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478 asn_random_fill_result_t
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479 NativeInteger_random_fill(const asn_TYPE_descriptor_t *td, void **sptr,
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480 const asn_encoding_constraints_t *constraints,
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481 size_t max_length) {
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482 const asn_INTEGER_specifics_t *specs =
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483 (const asn_INTEGER_specifics_t *)td->specifics;
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484 asn_random_fill_result_t result_ok = {ARFILL_OK, 1};
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485 asn_random_fill_result_t result_failed = {ARFILL_FAILED, 0};
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486 asn_random_fill_result_t result_skipped = {ARFILL_SKIPPED, 0};
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488 const asn_INTEGER_enum_map_t *emap;
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491 int find_inside_map;
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493 if(max_length == 0) return result_skipped;
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496 st = (long *)CALLOC(1, sizeof(*st));
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498 return result_failed;
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503 emap = specs->value2enum;
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504 emap_len = specs->map_count;
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505 if(specs->strict_enumeration) {
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506 find_inside_map = emap_len > 0;
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508 find_inside_map = emap_len ? asn_random_between(0, 1) : 0;
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513 find_inside_map = 0;
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516 if(find_inside_map) {
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517 assert(emap_len > 0);
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518 value = emap[asn_random_between(0, emap_len - 1)].nat_value;
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520 const asn_per_constraints_t *ct;
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522 static const long variants[] = {
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523 -65536, -65535, -65534, -32769, -32768, -32767, -16385, -16384,
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524 -16383, -257, -256, -255, -254, -129, -128, -127,
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525 -126, -1, 0, 1, 126, 127, 128, 129,
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526 254, 255, 256, 257, 16383, 16384, 16385, 32767,
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527 32768, 32769, 65534, 65535, 65536, 65537};
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528 if(specs && specs->field_unsigned) {
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529 assert(variants[18] == 0);
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530 value = variants[asn_random_between(
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531 18, sizeof(variants) / sizeof(variants[0]) - 1)];
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533 value = variants[asn_random_between(
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534 0, sizeof(variants) / sizeof(variants[0]) - 1)];
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537 if(!constraints) constraints = &td->encoding_constraints;
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538 ct = constraints ? constraints->per_constraints : 0;
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539 if(ct && (ct->value.flags & APC_CONSTRAINED)) {
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540 if(value < ct->value.lower_bound || value > ct->value.upper_bound) {
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541 value = asn_random_between(ct->value.lower_bound,
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542 ct->value.upper_bound);
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