Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 1 | /*- |
Lev Walkin | e9360e6 | 2013-03-28 00:21:57 -0700 | [diff] [blame] | 2 | * Copyright (c) 2004-2013 Lev Walkin <vlm@lionet.info>. All rights reserved. |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
Lev Walkin | e9360e6 | 2013-03-28 00:21:57 -0700 | [diff] [blame] | 5 | #define _ISOC99_SOURCE /* For ilogb() and quiet NAN */ |
Vasil Velichkov | adf6594 | 2016-08-01 16:52:02 +0300 | [diff] [blame] | 6 | #ifndef _BSD_SOURCE |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 7 | #define _BSD_SOURCE /* To reintroduce finite(3) */ |
Vasil Velichkov | adf6594 | 2016-08-01 16:52:02 +0300 | [diff] [blame] | 8 | #endif |
Lev Walkin | 73823e1 | 2013-03-28 00:24:48 -0700 | [diff] [blame] | 9 | #if defined(__alpha) |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 10 | #include <sys/resource.h> /* For INFINITY */ |
Lev Walkin | 3370016 | 2004-10-26 09:03:31 +0000 | [diff] [blame] | 11 | #endif |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 12 | #include <asn_internal.h> |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 13 | #include <stdlib.h> /* for strtod(3) */ |
| 14 | #include <math.h> |
| 15 | #include <errno.h> |
Lev Walkin | 3370016 | 2004-10-26 09:03:31 +0000 | [diff] [blame] | 16 | #include <REAL.h> |
Lev Walkin | 725883b | 2006-10-09 12:07:58 +0000 | [diff] [blame] | 17 | #include <OCTET_STRING.h> |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 18 | |
| 19 | #undef INT_MAX |
| 20 | #define INT_MAX ((int)(((unsigned int)-1) >> 1)) |
| 21 | |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 22 | #if !(defined(NAN) || defined(INFINITY)) |
Lev Walkin | 50b0f6c | 2006-10-16 12:01:36 +0000 | [diff] [blame] | 23 | static volatile double real_zero GCC_NOTUSED = 0.0; |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 24 | #endif |
Lev Walkin | ae1bce9 | 2004-09-27 22:18:34 +0000 | [diff] [blame] | 25 | #ifndef NAN |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 26 | #define NAN (real_zero/real_zero) |
Lev Walkin | 40319a1 | 2004-09-14 13:40:42 +0000 | [diff] [blame] | 27 | #endif |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 28 | #ifndef INFINITY |
| 29 | #define INFINITY (1.0/real_zero) |
| 30 | #endif |
Lev Walkin | 40319a1 | 2004-09-14 13:40:42 +0000 | [diff] [blame] | 31 | |
Lev Walkin | daeb216 | 2014-01-13 23:08:35 -0800 | [diff] [blame] | 32 | #ifdef isfinite |
| 33 | #define _asn_isfinite(d) isfinite(d) /* ISO C99 */ |
| 34 | #else |
| 35 | #define _asn_isfinite(d) finite(d) /* Deprecated on Mac OS X 10.9 */ |
| 36 | #endif |
| 37 | |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 38 | /* |
| 39 | * REAL basic type description. |
| 40 | */ |
Wim Lewis | 18c2ec9 | 2014-07-29 11:30:10 -0700 | [diff] [blame] | 41 | static const ber_tlv_tag_t asn_DEF_REAL_tags[] = { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 42 | (ASN_TAG_CLASS_UNIVERSAL | (9 << 2)) |
| 43 | }; |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 44 | asn_TYPE_descriptor_t asn_DEF_REAL = { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 45 | "REAL", |
Lev Walkin | dc06f6b | 2004-10-20 15:50:55 +0000 | [diff] [blame] | 46 | "REAL", |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 47 | ASN__PRIMITIVE_TYPE_free, |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 48 | REAL_print, |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 49 | asn_generic_no_constraint, |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 50 | ber_decode_primitive, |
| 51 | der_encode_primitive, |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 52 | REAL_decode_xer, |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 53 | REAL_encode_xer, |
Lev Walkin | 80334ed | 2017-07-06 07:28:21 -0700 | [diff] [blame] | 54 | #ifdef ASN_DISABLE_PER_SUPPORT |
| 55 | 0, |
| 56 | 0, |
| 57 | #else |
Lev Walkin | 725883b | 2006-10-09 12:07:58 +0000 | [diff] [blame] | 58 | REAL_decode_uper, |
| 59 | REAL_encode_uper, |
Lev Walkin | 80334ed | 2017-07-06 07:28:21 -0700 | [diff] [blame] | 60 | #endif /* ASN_DISABLE_PER_SUPPORT */ |
Lev Walkin | cc15947 | 2017-07-06 08:26:36 -0700 | [diff] [blame] | 61 | #ifdef ASN_DISABLE_OER_SUPPORT |
| 62 | 0, |
| 63 | 0, |
| 64 | #else |
| 65 | 0, |
| 66 | 0, |
| 67 | #endif /* ASN_DISABLE_OER_SUPPORT */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 68 | 0, /* Use generic outmost tag fetcher */ |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 69 | asn_DEF_REAL_tags, |
| 70 | sizeof(asn_DEF_REAL_tags) / sizeof(asn_DEF_REAL_tags[0]), |
| 71 | asn_DEF_REAL_tags, /* Same as above */ |
| 72 | sizeof(asn_DEF_REAL_tags) / sizeof(asn_DEF_REAL_tags[0]), |
Lev Walkin | 59b176e | 2005-11-26 11:25:14 +0000 | [diff] [blame] | 73 | 0, /* No PER visible constraints */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 74 | 0, 0, /* No members */ |
| 75 | 0 /* No specifics */ |
| 76 | }; |
| 77 | |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 78 | typedef enum specialRealValue { |
| 79 | SRV__NOT_A_NUMBER, |
| 80 | SRV__MINUS_INFINITY, |
| 81 | SRV__PLUS_INFINITY |
| 82 | } specialRealValue_e; |
| 83 | static struct specialRealValue_s { |
| 84 | char *string; |
Lev Walkin | 8471cec | 2004-10-21 14:02:19 +0000 | [diff] [blame] | 85 | size_t length; |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 86 | long dv; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 87 | } specialRealValue[] = { |
| 88 | #define SRV_SET(foo, val) { foo, sizeof(foo) - 1, val } |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 89 | SRV_SET("<NOT-A-NUMBER/>", 0), |
| 90 | SRV_SET("<MINUS-INFINITY/>", -1), |
| 91 | SRV_SET("<PLUS-INFINITY/>", 1), |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 92 | #undef SRV_SET |
| 93 | }; |
| 94 | |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 95 | ssize_t |
| 96 | REAL__dump(double d, int canonical, asn_app_consume_bytes_f *cb, void *app_key) { |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 97 | char local_buf[64]; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 98 | char *buf = local_buf; |
| 99 | ssize_t buflen = sizeof(local_buf); |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 100 | const char *fmt = canonical?"%.15E":"%.15f"; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 101 | ssize_t ret; |
| 102 | |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 103 | /* |
| 104 | * Check whether it is a special value. |
| 105 | */ |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 106 | /* fpclassify(3) is not portable yet */ |
| 107 | if(isnan(d)) { |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 108 | buf = specialRealValue[SRV__NOT_A_NUMBER].string; |
| 109 | buflen = specialRealValue[SRV__NOT_A_NUMBER].length; |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 110 | return (cb(buf, buflen, app_key) < 0) ? -1 : buflen; |
Lev Walkin | daeb216 | 2014-01-13 23:08:35 -0800 | [diff] [blame] | 111 | } else if(!_asn_isfinite(d)) { |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 112 | if(copysign(1.0, d) < 0.0) { |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 113 | buf = specialRealValue[SRV__MINUS_INFINITY].string; |
| 114 | buflen = specialRealValue[SRV__MINUS_INFINITY].length; |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 115 | } else { |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 116 | buf = specialRealValue[SRV__PLUS_INFINITY].string; |
| 117 | buflen = specialRealValue[SRV__PLUS_INFINITY].length; |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 118 | } |
| 119 | return (cb(buf, buflen, app_key) < 0) ? -1 : buflen; |
| 120 | } else if(ilogb(d) <= -INT_MAX) { |
| 121 | if(copysign(1.0, d) < 0.0) { |
| 122 | buf = "-0"; |
| 123 | buflen = 2; |
| 124 | } else { |
| 125 | buf = "0"; |
| 126 | buflen = 1; |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 127 | } |
| 128 | return (cb(buf, buflen, app_key) < 0) ? -1 : buflen; |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * Use the libc's double printing, hopefully they got it right. |
| 133 | */ |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 134 | do { |
| 135 | ret = snprintf(buf, buflen, fmt, d); |
| 136 | if(ret < 0) { |
| 137 | buflen <<= 1; |
| 138 | } else if(ret >= buflen) { |
| 139 | buflen = ret + 1; |
| 140 | } else { |
| 141 | buflen = ret; |
| 142 | break; |
| 143 | } |
Lev Walkin | 419f675 | 2006-09-13 04:02:00 +0000 | [diff] [blame] | 144 | if(buf != local_buf) FREEMEM(buf); |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 145 | buf = (char *)MALLOC(buflen); |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 146 | if(!buf) return -1; |
| 147 | } while(1); |
| 148 | |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 149 | if(canonical) { |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 150 | /* |
| 151 | * Transform the "[-]d.dddE+-dd" output into "[-]d.dddE[-]d" |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 152 | * Check that snprintf() constructed the output correctly. |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 153 | */ |
Lev Walkin | 8ca13c8 | 2016-01-24 22:40:00 -0800 | [diff] [blame] | 154 | char *dot; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 155 | char *end = buf + buflen; |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 156 | char *last_zero; |
Lev Walkin | 8ca13c8 | 2016-01-24 22:40:00 -0800 | [diff] [blame] | 157 | char *prev_zero; |
| 158 | char *s; |
| 159 | |
| 160 | enum { |
| 161 | LZSTATE_NOTHING, |
| 162 | LZSTATE_SEEN_ZERO |
| 163 | } lz_state = LZSTATE_NOTHING; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 164 | |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 165 | dot = (buf[0] == 0x2d /* '-' */) ? (buf + 2) : (buf + 1); |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 166 | if(*dot >= 0x30) { |
Lev Walkin | 78d917d | 2012-01-07 15:29:08 -0800 | [diff] [blame] | 167 | if(buf != local_buf) FREEMEM(buf); |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 168 | errno = EINVAL; |
| 169 | return -1; /* Not a dot, really */ |
| 170 | } |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 171 | *dot = 0x2e; /* Replace possible comma */ |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 172 | |
Lev Walkin | 8ca13c8 | 2016-01-24 22:40:00 -0800 | [diff] [blame] | 173 | for(prev_zero = last_zero = s = dot + 2; s < end; s++) { |
| 174 | switch(*s) { |
| 175 | case 0x45: /* 'E' */ |
| 176 | if(lz_state == LZSTATE_SEEN_ZERO) |
| 177 | last_zero = prev_zero; |
| 178 | break; |
| 179 | case 0x30: /* '0' */ |
| 180 | if(lz_state == LZSTATE_NOTHING) |
| 181 | prev_zero = s; |
| 182 | lz_state = LZSTATE_SEEN_ZERO; |
| 183 | continue; |
| 184 | default: |
| 185 | lz_state = LZSTATE_NOTHING; |
| 186 | continue; |
| 187 | } |
| 188 | break; |
| 189 | } |
| 190 | |
| 191 | if(s == end) { |
Lev Walkin | 78d917d | 2012-01-07 15:29:08 -0800 | [diff] [blame] | 192 | if(buf != local_buf) FREEMEM(buf); |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 193 | errno = EINVAL; |
| 194 | return -1; /* No promised E */ |
| 195 | } |
Lev Walkin | 8ca13c8 | 2016-01-24 22:40:00 -0800 | [diff] [blame] | 196 | |
| 197 | assert(*s == 0x45); |
| 198 | { |
| 199 | char *E = s; |
| 200 | char *expptr = ++E; |
| 201 | char *s = expptr; |
| 202 | int sign; |
| 203 | |
| 204 | if(*expptr == 0x2b /* '+' */) { |
| 205 | /* Skip the "+" */ |
| 206 | buflen -= 1; |
| 207 | sign = 0; |
| 208 | } else { |
| 209 | sign = 1; |
| 210 | s++; |
| 211 | } |
| 212 | expptr++; |
| 213 | if(expptr > end) { |
| 214 | if(buf != local_buf) FREEMEM(buf); |
| 215 | errno = EINVAL; |
| 216 | return -1; |
| 217 | } |
| 218 | if(*expptr == 0x30) { |
| 219 | buflen--; |
| 220 | expptr++; |
| 221 | } |
| 222 | if(*last_zero == 0x30) { |
| 223 | *last_zero = 0x45; /* E */ |
| 224 | buflen -= s - (last_zero + 1); |
| 225 | s = last_zero + 1; |
| 226 | if(sign) { |
| 227 | *s++ = 0x2d /* '-' */; |
| 228 | buflen++; |
| 229 | } |
| 230 | } |
| 231 | for(; expptr <= end; s++, expptr++) |
| 232 | *s = *expptr; |
| 233 | } |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 234 | } else { |
| 235 | /* |
| 236 | * Remove trailing zeros. |
| 237 | */ |
| 238 | char *end = buf + buflen; |
| 239 | char *last_zero = end; |
Lev Walkin | f0b808d | 2005-04-25 21:08:25 +0000 | [diff] [blame] | 240 | int stoplooking = 0; |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 241 | char *z; |
| 242 | for(z = end - 1; z > buf; z--) { |
| 243 | switch(*z) { |
Lev Walkin | f0b808d | 2005-04-25 21:08:25 +0000 | [diff] [blame] | 244 | case 0x30: |
| 245 | if(!stoplooking) |
| 246 | last_zero = z; |
| 247 | continue; |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 248 | case 0x31: case 0x32: case 0x33: case 0x34: |
| 249 | case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: |
Lev Walkin | f0b808d | 2005-04-25 21:08:25 +0000 | [diff] [blame] | 250 | stoplooking = 1; |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 251 | continue; |
| 252 | default: /* Catch dot and other separators */ |
Lev Walkin | f0b808d | 2005-04-25 21:08:25 +0000 | [diff] [blame] | 253 | /* |
| 254 | * Replace possible comma (which may even |
| 255 | * be not a comma at all: locale-defined). |
| 256 | */ |
| 257 | *z = 0x2e; |
Lev Walkin | 92b35d2 | 2004-09-27 20:52:18 +0000 | [diff] [blame] | 258 | if(last_zero == z + 1) { /* leave x.0 */ |
| 259 | last_zero++; |
| 260 | } |
| 261 | buflen = last_zero - buf; |
| 262 | *last_zero = '\0'; |
| 263 | break; |
| 264 | } |
| 265 | break; |
| 266 | } |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | ret = cb(buf, buflen, app_key); |
Lev Walkin | 419f675 | 2006-09-13 04:02:00 +0000 | [diff] [blame] | 270 | if(buf != local_buf) FREEMEM(buf); |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 271 | return (ret < 0) ? -1 : buflen; |
| 272 | } |
| 273 | |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 274 | int |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 275 | REAL_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 276 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 277 | const REAL_t *st = (const REAL_t *)sptr; |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 278 | ssize_t ret; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 279 | double d; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 280 | |
| 281 | (void)td; /* Unused argument */ |
| 282 | (void)ilevel; /* Unused argument */ |
| 283 | |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 284 | if(!st || !st->buf) |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 285 | ret = cb("<absent>", 8, app_key); |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 286 | else if(asn_REAL2double(st, &d)) |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 287 | ret = cb("<error>", 7, app_key); |
| 288 | else |
| 289 | ret = REAL__dump(d, 0, cb, app_key); |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 290 | |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 291 | return (ret < 0) ? -1 : 0; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 292 | } |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 293 | |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 294 | asn_enc_rval_t |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 295 | REAL_encode_xer(asn_TYPE_descriptor_t *td, void *sptr, |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 296 | int ilevel, enum xer_encoder_flags_e flags, |
| 297 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 298 | REAL_t *st = (REAL_t *)sptr; |
| 299 | asn_enc_rval_t er; |
| 300 | double d; |
| 301 | |
| 302 | (void)ilevel; |
| 303 | |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 304 | if(!st || !st->buf || asn_REAL2double(st, &d)) |
Lev Walkin | 7c1dc05 | 2016-03-14 03:08:15 -0700 | [diff] [blame] | 305 | ASN__ENCODE_FAILED; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 306 | |
| 307 | er.encoded = REAL__dump(d, flags & XER_F_CANONICAL, cb, app_key); |
Lev Walkin | 7c1dc05 | 2016-03-14 03:08:15 -0700 | [diff] [blame] | 308 | if(er.encoded < 0) ASN__ENCODE_FAILED; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 309 | |
Lev Walkin | 7c1dc05 | 2016-03-14 03:08:15 -0700 | [diff] [blame] | 310 | ASN__ENCODED_OK(er); |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 311 | } |
| 312 | |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 313 | |
| 314 | /* |
| 315 | * Decode the chunk of XML text encoding REAL. |
| 316 | */ |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 317 | static enum xer_pbd_rval |
| 318 | REAL__xer_body_decode(asn_TYPE_descriptor_t *td, void *sptr, const void *chunk_buf, size_t chunk_size) { |
Lev Walkin | 8471cec | 2004-10-21 14:02:19 +0000 | [diff] [blame] | 319 | REAL_t *st = (REAL_t *)sptr; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 320 | double value; |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 321 | const char *xerdata = (const char *)chunk_buf; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 322 | char *endptr = 0; |
| 323 | char *b; |
| 324 | |
Lev Walkin | e0b56e0 | 2005-02-25 12:10:27 +0000 | [diff] [blame] | 325 | (void)td; |
| 326 | |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 327 | if(!chunk_size) return XPBD_BROKEN_ENCODING; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 328 | |
| 329 | /* |
| 330 | * Decode an XMLSpecialRealValue: <MINUS-INFINITY>, etc. |
| 331 | */ |
| 332 | if(xerdata[0] == 0x3c /* '<' */) { |
| 333 | size_t i; |
| 334 | for(i = 0; i < sizeof(specialRealValue) |
| 335 | / sizeof(specialRealValue[0]); i++) { |
| 336 | struct specialRealValue_s *srv = &specialRealValue[i]; |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 337 | double dv; |
| 338 | |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 339 | if(srv->length != chunk_size |
| 340 | || memcmp(srv->string, chunk_buf, chunk_size)) |
| 341 | continue; |
| 342 | |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 343 | /* |
| 344 | * It could've been done using |
| 345 | * (double)srv->dv / real_zero, |
| 346 | * but it summons fp exception on some platforms. |
| 347 | */ |
| 348 | switch(srv->dv) { |
| 349 | case -1: dv = - INFINITY; break; |
| 350 | case 0: dv = NAN; break; |
| 351 | case 1: dv = INFINITY; break; |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 352 | default: return XPBD_SYSTEM_FAILURE; |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 353 | } |
| 354 | |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 355 | if(asn_double2REAL(st, dv)) |
| 356 | return XPBD_SYSTEM_FAILURE; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 357 | |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 358 | return XPBD_BODY_CONSUMED; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 359 | } |
| 360 | ASN_DEBUG("Unknown XMLSpecialRealValue"); |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 361 | return XPBD_BROKEN_ENCODING; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | /* |
| 365 | * Copy chunk into the nul-terminated string, and run strtod. |
| 366 | */ |
Lev Walkin | 8471cec | 2004-10-21 14:02:19 +0000 | [diff] [blame] | 367 | b = (char *)MALLOC(chunk_size + 1); |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 368 | if(!b) return XPBD_SYSTEM_FAILURE; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 369 | memcpy(b, chunk_buf, chunk_size); |
Lev Walkin | 8471cec | 2004-10-21 14:02:19 +0000 | [diff] [blame] | 370 | b[chunk_size] = 0; /* nul-terminate */ |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 371 | |
| 372 | value = strtod(b, &endptr); |
Lev Walkin | 419f675 | 2006-09-13 04:02:00 +0000 | [diff] [blame] | 373 | FREEMEM(b); |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 374 | if(endptr == b) return XPBD_BROKEN_ENCODING; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 375 | |
| 376 | if(asn_double2REAL(st, value)) |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 377 | return XPBD_SYSTEM_FAILURE; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 378 | |
Lev Walkin | 0fab1a6 | 2005-03-09 22:19:25 +0000 | [diff] [blame] | 379 | return XPBD_BODY_CONSUMED; |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | asn_dec_rval_t |
| 383 | REAL_decode_xer(asn_codec_ctx_t *opt_codec_ctx, |
| 384 | asn_TYPE_descriptor_t *td, void **sptr, const char *opt_mname, |
Lev Walkin | 8c3b854 | 2005-03-10 18:52:02 +0000 | [diff] [blame] | 385 | const void *buf_ptr, size_t size) { |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 386 | |
| 387 | return xer_decode_primitive(opt_codec_ctx, td, |
Lev Walkin | 8471cec | 2004-10-21 14:02:19 +0000 | [diff] [blame] | 388 | sptr, sizeof(REAL_t), opt_mname, |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 389 | buf_ptr, size, REAL__xer_body_decode); |
| 390 | } |
| 391 | |
Lev Walkin | 725883b | 2006-10-09 12:07:58 +0000 | [diff] [blame] | 392 | asn_dec_rval_t |
| 393 | REAL_decode_uper(asn_codec_ctx_t *opt_codec_ctx, |
| 394 | asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, |
| 395 | void **sptr, asn_per_data_t *pd) { |
| 396 | (void)constraints; /* No PER visible constraints */ |
| 397 | return OCTET_STRING_decode_uper(opt_codec_ctx, td, 0, sptr, pd); |
| 398 | } |
| 399 | |
| 400 | asn_enc_rval_t |
| 401 | REAL_encode_uper(asn_TYPE_descriptor_t *td, |
| 402 | asn_per_constraints_t *constraints, void *sptr, asn_per_outp_t *po) { |
| 403 | (void)constraints; /* No PER visible constraints */ |
| 404 | return OCTET_STRING_encode_uper(td, 0, sptr, po); |
| 405 | } |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 406 | |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 407 | int |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 408 | asn_REAL2double(const REAL_t *st, double *dbl_value) { |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 409 | unsigned int octv; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 410 | |
| 411 | if(!st || !st->buf) { |
| 412 | errno = EINVAL; |
| 413 | return -1; |
| 414 | } |
| 415 | |
| 416 | if(st->size == 0) { |
| 417 | *dbl_value = 0; |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | octv = st->buf[0]; /* unsigned byte */ |
| 422 | |
| 423 | switch(octv & 0xC0) { |
Lev Walkin | 5fda7d5 | 2012-01-09 03:20:19 -0800 | [diff] [blame] | 424 | case 0x40: /* X.690: 8.5.6 a) => 8.5.9 */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 425 | /* "SpecialRealValue" */ |
| 426 | |
| 427 | /* Be liberal in what you accept... |
Lev Walkin | 749916f | 2012-01-07 17:03:39 -0800 | [diff] [blame] | 428 | * http://en.wikipedia.org/wiki/Robustness_principle |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 429 | if(st->size != 1) ... |
| 430 | */ |
| 431 | |
| 432 | switch(st->buf[0]) { |
| 433 | case 0x40: /* 01000000: PLUS-INFINITY */ |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 434 | *dbl_value = INFINITY; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 435 | return 0; |
| 436 | case 0x41: /* 01000001: MINUS-INFINITY */ |
Lev Walkin | 1aea698 | 2004-10-26 09:35:25 +0000 | [diff] [blame] | 437 | *dbl_value = - INFINITY; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 438 | return 0; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 439 | case 0x42: /* 01000010: NOT-A-NUMBER */ |
| 440 | *dbl_value = NAN; |
| 441 | return 0; |
| 442 | case 0x43: /* 01000011: minus zero */ |
Lev Walkin | 2a789d9 | 2004-09-27 21:36:59 +0000 | [diff] [blame] | 443 | *dbl_value = -0.0; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | errno = EINVAL; |
| 448 | return -1; |
Lev Walkin | 0959ffb | 2011-06-25 15:48:52 -0700 | [diff] [blame] | 449 | case 0x00: { /* X.690: 8.5.7 */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 450 | /* |
Lev Walkin | 5fda7d5 | 2012-01-09 03:20:19 -0800 | [diff] [blame] | 451 | * Decimal. NR{1,2,3} format from ISO 6093. |
| 452 | * NR1: [ ]*[+-]?[0-9]+ |
| 453 | * NR2: [ ]*[+-]?([0-9]+\.[0-9]*|[0-9]*\.[0-9]+) |
| 454 | * NR3: [ ]*[+-]?([0-9]+\.[0-9]*|[0-9]*\.[0-9]+)[Ee][+-]?[0-9]+ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 455 | */ |
| 456 | double d; |
Lev Walkin | 5fda7d5 | 2012-01-09 03:20:19 -0800 | [diff] [blame] | 457 | char *buf; |
| 458 | char *endptr; |
| 459 | int used_malloc = 0; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 460 | |
Lev Walkin | 5fda7d5 | 2012-01-09 03:20:19 -0800 | [diff] [blame] | 461 | if(octv == 0 || (octv & 0x3C)) { |
Lev Walkin | 0959ffb | 2011-06-25 15:48:52 -0700 | [diff] [blame] | 462 | /* Remaining values of bits 6 to 1 are Reserved. */ |
| 463 | errno = EINVAL; |
| 464 | return -1; |
| 465 | } |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 466 | |
Lev Walkin | 5fda7d5 | 2012-01-09 03:20:19 -0800 | [diff] [blame] | 467 | |
| 468 | /* 1. By contract, an input buffer should be null-terminated. |
| 469 | * OCTET STRING decoder ensures that, as is asn_double2REAL(). |
| 470 | * 2. ISO 6093 specifies COMMA as a possible decimal separator. |
| 471 | * However, strtod() can't always deal with COMMA. |
| 472 | * So her we fix both by reallocating, copying and fixing. |
| 473 | */ |
| 474 | if(st->buf[st->size] || memchr(st->buf, ',', st->size)) { |
| 475 | uint8_t *p, *end; |
| 476 | char *b; |
| 477 | if(st->size > 100) { |
| 478 | /* Avoid malicious stack overflow in alloca() */ |
| 479 | buf = (char *)MALLOC(st->size); |
| 480 | if(!buf) return -1; |
| 481 | used_malloc = 1; |
| 482 | } else { |
| 483 | buf = alloca(st->size); |
| 484 | } |
| 485 | b = buf; |
| 486 | /* Copy without the first byte and with 0-termination */ |
| 487 | for(p = st->buf + 1, end = st->buf + st->size; |
| 488 | p < end; b++, p++) |
| 489 | *b = (*p == ',') ? '.' : *p; |
| 490 | *b = '\0'; |
| 491 | } else { |
| 492 | buf = (char *)&st->buf[1]; |
| 493 | } |
| 494 | |
| 495 | endptr = buf; |
| 496 | d = strtod(buf, &endptr); |
| 497 | if(*endptr != '\0') { |
| 498 | /* Format is not consistent with ISO 6093 */ |
| 499 | if(used_malloc) FREEMEM(buf); |
Lev Walkin | 0959ffb | 2011-06-25 15:48:52 -0700 | [diff] [blame] | 500 | errno = EINVAL; |
| 501 | return -1; |
| 502 | } |
Lev Walkin | 5fda7d5 | 2012-01-09 03:20:19 -0800 | [diff] [blame] | 503 | if(used_malloc) FREEMEM(buf); |
Lev Walkin | daeb216 | 2014-01-13 23:08:35 -0800 | [diff] [blame] | 504 | if(_asn_isfinite(d)) { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 505 | *dbl_value = d; |
| 506 | return 0; |
| 507 | } else { |
| 508 | errno = ERANGE; |
Lev Walkin | 0959ffb | 2011-06-25 15:48:52 -0700 | [diff] [blame] | 509 | return -1; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 510 | } |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | /* |
| 515 | * Binary representation. |
| 516 | */ |
| 517 | { |
| 518 | double m; |
| 519 | int expval; /* exponent value */ |
| 520 | unsigned int elen; /* exponent value length, in octets */ |
| 521 | unsigned int scaleF; |
| 522 | unsigned int baseF; |
| 523 | uint8_t *ptr; |
| 524 | uint8_t *end; |
| 525 | int sign; |
| 526 | |
| 527 | switch((octv & 0x30) >> 4) { |
| 528 | case 0x00: baseF = 1; break; /* base 2 */ |
| 529 | case 0x01: baseF = 3; break; /* base 8 */ |
| 530 | case 0x02: baseF = 4; break; /* base 16 */ |
| 531 | default: |
| 532 | /* Reserved field, can't parse now. */ |
| 533 | errno = EINVAL; |
| 534 | return -1; |
| 535 | } |
| 536 | |
| 537 | sign = (octv & 0x40); /* bit 7 */ |
| 538 | scaleF = (octv & 0x0C) >> 2; /* bits 4 to 3 */ |
| 539 | |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 540 | if(st->size <= (int)(1 + (octv & 0x03))) { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 541 | errno = EINVAL; |
| 542 | return -1; |
| 543 | } |
| 544 | |
Lev Walkin | e78753d | 2007-06-23 17:02:00 +0000 | [diff] [blame] | 545 | elen = (octv & 0x03); /* bits 2 to 1; 8.5.6.4 */ |
| 546 | if(elen == 0x03) { /* bits 2 to 1 = 11; 8.5.6.4, case d) */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 547 | elen = st->buf[1]; /* unsigned binary number */ |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 548 | if(elen == 0 || st->size <= (int)(2 + elen)) { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 549 | errno = EINVAL; |
| 550 | return -1; |
| 551 | } |
Lev Walkin | e78753d | 2007-06-23 17:02:00 +0000 | [diff] [blame] | 552 | /* FIXME: verify constraints of case d) */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 553 | ptr = &st->buf[2]; |
| 554 | } else { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 555 | ptr = &st->buf[1]; |
| 556 | } |
| 557 | |
| 558 | /* Fetch the multibyte exponent */ |
| 559 | expval = (int)(*(int8_t *)ptr); |
| 560 | end = ptr + elen + 1; |
| 561 | for(ptr++; ptr < end; ptr++) |
| 562 | expval = (expval * 256) + *ptr; |
| 563 | |
| 564 | m = 0.0; /* Initial mantissa value */ |
| 565 | |
| 566 | /* Okay, the exponent is here. Now, what about mantissa? */ |
| 567 | end = st->buf + st->size; |
Lev Walkin | 5fda7d5 | 2012-01-09 03:20:19 -0800 | [diff] [blame] | 568 | for(; ptr < end; ptr++) |
| 569 | m = ldexp(m, 8) + *ptr; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 570 | |
Lev Walkin | 5f56091 | 2004-10-21 13:37:57 +0000 | [diff] [blame] | 571 | if(0) |
Lev Walkin | 5fda7d5 | 2012-01-09 03:20:19 -0800 | [diff] [blame] | 572 | ASN_DEBUG("m=%.10f, scF=%d, bF=%d, expval=%d, ldexp()=%f, ldexp()=%f\n", |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 573 | m, scaleF, baseF, expval, |
| 574 | ldexp(m, expval * baseF + scaleF), |
Lev Walkin | 77aa90f | 2005-04-28 22:56:36 +0000 | [diff] [blame] | 575 | ldexp(m, scaleF) * pow(pow(2, baseF), expval) |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 576 | ); |
| 577 | |
| 578 | /* |
| 579 | * (S * N * 2^F) * B^E |
| 580 | * Essentially: |
Lev Walkin | 77aa90f | 2005-04-28 22:56:36 +0000 | [diff] [blame] | 581 | m = ldexp(m, scaleF) * pow(pow(2, base), expval); |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 582 | */ |
| 583 | m = ldexp(m, expval * baseF + scaleF); |
Lev Walkin | daeb216 | 2014-01-13 23:08:35 -0800 | [diff] [blame] | 584 | if(_asn_isfinite(m)) { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 585 | *dbl_value = sign ? -m : m; |
| 586 | } else { |
| 587 | errno = ERANGE; |
| 588 | return -1; |
| 589 | } |
| 590 | |
| 591 | } /* if(binary_format) */ |
| 592 | |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | /* |
| 597 | * Assume IEEE 754 floating point: standard 64 bit double. |
| 598 | * [1 bit sign] [11 bits exponent] [52 bits mantissa] |
| 599 | */ |
| 600 | int |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 601 | asn_double2REAL(REAL_t *st, double dbl_value) { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 602 | #ifdef WORDS_BIGENDIAN /* Known to be big-endian */ |
| 603 | int littleEndian = 0; |
| 604 | #else /* need to test: have no explicit information */ |
| 605 | unsigned int LE = 1; |
| 606 | int littleEndian = *(unsigned char *)&LE; |
| 607 | #endif |
| 608 | uint8_t buf[16]; /* More than enough for 8-byte dbl_value */ |
| 609 | uint8_t dscr[sizeof(dbl_value)]; /* double value scratch pad */ |
| 610 | /* Assertion guards: won't even compile, if unexpected double size */ |
Lev Walkin | 50b0f6c | 2006-10-16 12:01:36 +0000 | [diff] [blame] | 611 | char assertion_buffer1[9 - sizeof(dbl_value)] GCC_NOTUSED; |
| 612 | char assertion_buffer2[sizeof(dbl_value) - 7] GCC_NOTUSED; |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 613 | uint8_t *ptr = buf; |
| 614 | uint8_t *mstop; /* Last byte of mantissa */ |
| 615 | unsigned int mval; /* Value of the last byte of mantissa */ |
| 616 | unsigned int bmsign; /* binary mask with sign */ |
| 617 | unsigned int buflen; |
| 618 | unsigned int accum; |
| 619 | int expval; |
| 620 | |
| 621 | if(!st) { |
| 622 | errno = EINVAL; |
| 623 | return -1; |
| 624 | } |
| 625 | |
Lev Walkin | 057fb73 | 2004-09-14 13:58:10 +0000 | [diff] [blame] | 626 | /* |
| 627 | * ilogb(+-0) returns -INT_MAX or INT_MIN (platform-dependent) |
Lev Walkin | 2f50502 | 2005-07-01 08:28:18 +0000 | [diff] [blame] | 628 | * ilogb(+-inf) returns INT_MAX, logb(+-inf) returns +inf |
Lev Walkin | 2a789d9 | 2004-09-27 21:36:59 +0000 | [diff] [blame] | 629 | * ilogb(NaN) returns INT_MIN or INT_MAX (platform-dependent) |
Lev Walkin | 057fb73 | 2004-09-14 13:58:10 +0000 | [diff] [blame] | 630 | */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 631 | expval = ilogb(dbl_value); |
Lev Walkin | 2a789d9 | 2004-09-27 21:36:59 +0000 | [diff] [blame] | 632 | if(expval <= -INT_MAX /* Also catches +-0 and maybe isnan() */ |
| 633 | || expval == INT_MAX /* catches isfin() and maybe isnan() */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 634 | ) { |
| 635 | if(!st->buf || st->size < 2) { |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 636 | ptr = (uint8_t *)MALLOC(2); |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 637 | if(!ptr) return -1; |
| 638 | st->buf = ptr; |
| 639 | } |
| 640 | /* fpclassify(3) is not portable yet */ |
Lev Walkin | 2a789d9 | 2004-09-27 21:36:59 +0000 | [diff] [blame] | 641 | if(isnan(dbl_value)) { |
| 642 | st->buf[0] = 0x42; /* NaN */ |
| 643 | st->buf[1] = 0; |
| 644 | st->size = 1; |
Lev Walkin | daeb216 | 2014-01-13 23:08:35 -0800 | [diff] [blame] | 645 | } else if(!_asn_isfinite(dbl_value)) { |
Lev Walkin | 7e03db9 | 2004-09-14 13:50:21 +0000 | [diff] [blame] | 646 | if(copysign(1.0, dbl_value) < 0.0) { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 647 | st->buf[0] = 0x41; /* MINUS-INFINITY */ |
| 648 | } else { |
| 649 | st->buf[0] = 0x40; /* PLUS-INFINITY */ |
| 650 | } |
| 651 | st->buf[1] = 0; |
| 652 | st->size = 1; |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 653 | } else { |
Lev Walkin | 5fe72e9 | 2012-01-07 17:00:29 -0800 | [diff] [blame] | 654 | if(copysign(1.0, dbl_value) >= 0.0) { |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 655 | /* no content octets: positive zero */ |
| 656 | st->buf[0] = 0; /* JIC */ |
| 657 | st->size = 0; |
Lev Walkin | 5fe72e9 | 2012-01-07 17:00:29 -0800 | [diff] [blame] | 658 | } else { |
| 659 | /* Negative zero. #8.5.3, 8.5.9 */ |
| 660 | st->buf[0] = 0x43; |
| 661 | st->size = 1; |
Lev Walkin | c51e7d6 | 2004-09-27 22:16:18 +0000 | [diff] [blame] | 662 | } |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 663 | } |
| 664 | return 0; |
| 665 | } |
| 666 | |
| 667 | if(littleEndian) { |
| 668 | uint8_t *s = ((uint8_t *)&dbl_value) + sizeof(dbl_value) - 2; |
Lev Walkin | 057fb73 | 2004-09-14 13:58:10 +0000 | [diff] [blame] | 669 | uint8_t *start = ((uint8_t *)&dbl_value); |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 670 | uint8_t *d; |
| 671 | |
| 672 | bmsign = 0x80 | ((s[1] >> 1) & 0x40); /* binary mask & - */ |
Lev Walkin | 057fb73 | 2004-09-14 13:58:10 +0000 | [diff] [blame] | 673 | for(mstop = d = dscr; s >= start; d++, s--) { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 674 | *d = *s; |
| 675 | if(*d) mstop = d; |
| 676 | } |
| 677 | } else { |
| 678 | uint8_t *s = ((uint8_t *)&dbl_value) + 1; |
| 679 | uint8_t *end = ((uint8_t *)&dbl_value) + sizeof(double); |
| 680 | uint8_t *d; |
| 681 | |
| 682 | bmsign = 0x80 | ((s[-1] >> 1) & 0x40); /* binary mask & - */ |
| 683 | for(mstop = d = dscr; s < end; d++, s++) { |
| 684 | *d = *s; |
| 685 | if(*d) mstop = d; |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | /* Remove parts of the exponent, leave mantissa and explicit 1. */ |
| 690 | dscr[0] = 0x10 | (dscr[0] & 0x0f); |
| 691 | |
| 692 | /* Adjust exponent in a very unobvious way */ |
| 693 | expval -= 8 * ((mstop - dscr) + 1) - 4; |
| 694 | |
| 695 | /* This loop ensures DER conformance by forcing mantissa odd: 11.3.1 */ |
| 696 | mval = *mstop; |
| 697 | if(mval && !(mval & 1)) { |
| 698 | unsigned int shift_count = 1; |
| 699 | unsigned int ishift; |
| 700 | uint8_t *mptr; |
| 701 | |
| 702 | /* |
| 703 | * Figure out what needs to be done to make mantissa odd. |
| 704 | */ |
| 705 | if(!(mval & 0x0f)) /* Speed-up a little */ |
| 706 | shift_count = 4; |
| 707 | while(((mval >> shift_count) & 1) == 0) |
| 708 | shift_count++; |
| 709 | |
| 710 | ishift = 8 - shift_count; |
| 711 | accum = 0; |
| 712 | |
| 713 | /* Go over the buffer, shifting it shift_count bits right. */ |
| 714 | for(mptr = dscr; mptr <= mstop; mptr++) { |
| 715 | mval = *mptr; |
| 716 | *mptr = accum | (mval >> shift_count); |
| 717 | accum = mval << ishift; |
| 718 | } |
| 719 | |
Lev Walkin | b89b340 | 2012-01-09 18:26:30 -0800 | [diff] [blame] | 720 | /* Adjust exponent appropriately. */ |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 721 | expval += shift_count; |
| 722 | } |
| 723 | |
| 724 | if(expval < 0) { |
| 725 | if((expval >> 7) == -1) { |
| 726 | *ptr++ = bmsign | 0x00; |
| 727 | *ptr++ = expval; |
| 728 | } else if((expval >> 15) == -1) { |
| 729 | *ptr++ = bmsign | 0x01; |
| 730 | *ptr++ = expval >> 8; |
| 731 | *ptr++ = expval; |
| 732 | } else { |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 733 | *ptr++ = bmsign | 0x02; |
| 734 | *ptr++ = expval >> 16; |
| 735 | *ptr++ = expval >> 8; |
| 736 | *ptr++ = expval; |
| 737 | } |
| 738 | } else if(expval <= 0x7f) { |
| 739 | *ptr++ = bmsign | 0x00; |
| 740 | *ptr++ = expval; |
| 741 | } else if(expval <= 0x7fff) { |
| 742 | *ptr++ = bmsign | 0x01; |
| 743 | *ptr++ = expval >> 8; |
| 744 | *ptr++ = expval; |
| 745 | } else { |
| 746 | assert(expval <= 0x7fffff); |
| 747 | *ptr++ = bmsign | 0x02; |
| 748 | *ptr++ = expval >> 16; |
| 749 | *ptr++ = expval >> 8; |
| 750 | *ptr++ = expval; |
| 751 | } |
| 752 | |
| 753 | buflen = (mstop - dscr) + 1; |
| 754 | memcpy(ptr, dscr, buflen); |
| 755 | ptr += buflen; |
| 756 | buflen = ptr - buf; |
| 757 | |
Lev Walkin | c17d90f | 2005-01-17 14:32:45 +0000 | [diff] [blame] | 758 | ptr = (uint8_t *)MALLOC(buflen + 1); |
Lev Walkin | 41ba1f2 | 2004-09-14 12:46:35 +0000 | [diff] [blame] | 759 | if(!ptr) return -1; |
| 760 | |
| 761 | memcpy(ptr, buf, buflen); |
| 762 | buf[buflen] = 0; /* JIC */ |
| 763 | |
| 764 | if(st->buf) FREEMEM(st->buf); |
| 765 | st->buf = ptr; |
| 766 | st->size = buflen; |
| 767 | |
| 768 | return 0; |
| 769 | } |