crypto/err/err.c

   1 /* crypto/err/err.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "lhash.h"
  61 #include "crypto.h"
  62 #include "cryptlib.h"
  63 #include "buffer.h"
  64 #include "err.h"
  65 #include "crypto.h"
  66
  67
  68 static LHASH *error_hash=NULL;
  69 static LHASH *thread_hash=NULL;
  70
  71 #ifndef NOPROTO
  72 static unsigned long err_hash(ERR_STRING_DATA *a);
  73 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b);
  74 static unsigned long pid_hash(ERR_STATE *pid);
  75 static int pid_cmp(ERR_STATE *a,ERR_STATE *pid);
  76 static unsigned long get_error_values(int inc,char **file,int *line,
  77         char **data,int *flags);
  78 static void ERR_STATE_free(ERR_STATE *s);
  79 #else
  80 static unsigned long err_hash();
  81 static int err_cmp();
  82 static unsigned long pid_hash();
  83 static int pid_cmp();
  84 static unsigned long get_error_values();
  85 static void ERR_STATE_free();
  86 ERR_STATE *s;
  87 #endif
  88
  89 #ifndef NO_ERR
  90 static ERR_STRING_DATA ERR_str_libraries[]=
  91         {
  92 {ERR_PACK(ERR_LIB_NONE,0,0)             ,"unknown library"},
  93 {ERR_PACK(ERR_LIB_SYS,0,0)              ,"system library"},
  94 {ERR_PACK(ERR_LIB_BN,0,0)               ,"bignum routines"},
  95 {ERR_PACK(ERR_LIB_RSA,0,0)              ,"rsa routines"},
  96 {ERR_PACK(ERR_LIB_DH,0,0)               ,"Diffie-Hellman routines"},
  97 {ERR_PACK(ERR_LIB_EVP,0,0)              ,"digital envelope routines"},
  98 {ERR_PACK(ERR_LIB_BUF,0,0)              ,"memory buffer routines"},
  99 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 100 {ERR_PACK(ERR_LIB_OBJ,0,0)              ,"object identifier routines"},
 101 {ERR_PACK(ERR_LIB_PEM,0,0)              ,"PEM routines"},
 102 {ERR_PACK(ERR_LIB_ASN1,0,0)             ,"asn1 encoding routines"},
 103 {ERR_PACK(ERR_LIB_X509,0,0)             ,"x509 certificate routines"},
 104 {ERR_PACK(ERR_LIB_CONF,0,0)             ,"configuation file routines"},
 105 {ERR_PACK(ERR_LIB_METH,0,0)             ,"X509 lookup 'method' routines"},
 106 {ERR_PACK(ERR_LIB_SSL,0,0)              ,"SSL routines"},
 107 {ERR_PACK(ERR_LIB_RSAREF,0,0)           ,"RSAref routines"},
 108 {ERR_PACK(ERR_LIB_PROXY,0,0)            ,"Proxy routines"},
 109 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 110 {ERR_PACK(ERR_LIB_PKCS7,0,0)            ,"PKCS7 routines"},
 111 {ERR_PACK(ERR_LIB_X509V3,0,0)           ,"X509 V3 routines"},
 112 {0,NULL},
 113         };
 114
 115 static ERR_STRING_DATA ERR_str_functs[]=
 116         {
 117         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
 118         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
 119         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
 120         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"},
 121         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
 122         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
 123         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
 124         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
 125 #ifdef WINDOWS
 126         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
 127 #endif
 128         {0,NULL},
 129         };
 130
 131 static ERR_STRING_DATA ERR_str_reasons[]=
 132         {
 133 {ERR_R_FATAL                             ,"fatal"},
 134 {ERR_R_SYS_LIB                          ,"system lib"},
 135 {ERR_R_BN_LIB                           ,"BN lib"},
 136 {ERR_R_RSA_LIB                          ,"RSA lib"},
 137 {ERR_R_DH_LIB                           ,"DH lib"},
 138 {ERR_R_EVP_LIB                          ,"EVP lib"},
 139 {ERR_R_BUF_LIB                          ,"BUF lib"},
 140 {ERR_R_BIO_LIB                          ,"BIO lib"},
 141 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
 142 {ERR_R_PEM_LIB                          ,"PEM lib"},
 143 {ERR_R_X509_LIB                         ,"X509 lib"},
 144 {ERR_R_METH_LIB                         ,"METH lib"},
 145 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
 146 {ERR_R_CONF_LIB                         ,"CONF lib"},
 147 {ERR_R_SSL_LIB                          ,"SSL lib"},
 148 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
 149 {ERR_R_BIO_LIB                          ,"BIO lib"},
 150 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
 151 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
 152 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a fuction you should not call"},
 153 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
 154 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
 155 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
 156 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
 157 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
 158 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
 159 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
 160
 161 {0,NULL},
 162         };
 163 #endif
 164
 165 #define err_clear_data(p,i) \
 166         if (((p)->err_data[i] != NULL) && \
 167                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 168                 {  \
 169                 Free((p)->err_data[i]); \
 170                 (p)->err_data[i]=NULL; \
 171                 } \
 172         (p)->err_data_flags[i]=0;
 173
 174 static void ERR_STATE_free(s)
 175 ERR_STATE *s;
 176         {
 177         int i;
 178
 179         if(s == NULL)
 180             return;
 181
 182         for (i=0; i<ERR_NUM_ERRORS; i++)
 183                 {
 184                 err_clear_data(s,i);
 185                 }
 186         Free(s);
 187         }
 188
 189 void ERR_load_ERR_strings()
 190         {
 191         static int init=1;
 192
 193         if (init)
 194                 {
 195                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 196                 if (init == 0)
 197                         {
 198                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 199                         return;
 200                         }
 201                 init=0;
 202                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 203
 204 #ifndef NO_ERR
 205                 ERR_load_strings(0,ERR_str_libraries);
 206                 ERR_load_strings(0,ERR_str_reasons);
 207                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
 208 #endif
 209                 }
 210         }
 211
 212 void ERR_load_strings(lib,str)
 213 int lib;
 214 ERR_STRING_DATA *str;
 215         {
 216         if (error_hash == NULL)
 217                 {
 218                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 219                 error_hash=lh_new(err_hash,err_cmp);
 220                 if (error_hash == NULL)
 221                         {
 222                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 223                         return;
 224                         }
 225                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 226
 227                 ERR_load_ERR_strings();
 228                 }
 229
 230         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 231         while (str->error)
 232                 {
 233                 str->error|=ERR_PACK(lib,0,0);
 234                 lh_insert(error_hash,(char *)str);
 235                 str++;
 236                 }
 237         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 238         }
 239
 240 void ERR_free_strings()
 241         {
 242         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 243
 244         if (error_hash != NULL)
 245                 {
 246                 lh_free(error_hash);
 247                 error_hash=NULL;
 248                 }
 249
 250         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 251         }
 252
 253 /********************************************************/
 254
 255 void ERR_put_error(lib,func,reason,file,line)
 256 int lib,func,reason;
 257 char *file;
 258 int line;
 259         {
 260         ERR_STATE *es;
 261
 262         es=ERR_get_state();
 263
 264         es->top=(es->top+1)%ERR_NUM_ERRORS;
 265         if (es->top == es->bottom)
 266                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
 267         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
 268         es->err_file[es->top]=file;
 269         es->err_line[es->top]=line;
 270         err_clear_data(es,es->top);
 271         }
 272
 273 void ERR_clear_error()
 274         {
 275         ERR_STATE *es;
 276
 277         es=ERR_get_state();
 278
 279 #if 0
 280         /* hmm... is this needed */
 281         for (i=0; i<ERR_NUM_ERRORS; i++)
 282                 {
 283                 es->err_buffer[i]=0;
 284                 es->err_file[i]=NULL;
 285                 es->err_line[i]= -1;
 286                 err_clear_data(es,i);
 287                 }
 288 #endif
 289         es->top=es->bottom=0;
 290         }
 291
 292
 293 unsigned long ERR_get_error()
 294         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
 295
 296 unsigned long ERR_get_error_line(file,line)
 297 char **file;
 298 int *line;
 299         { return(get_error_values(1,file,line,NULL,NULL)); }
 300
 301 unsigned long ERR_get_error_line_data(file,line,data,flags)
 302 char **file;
 303 int *line;
 304 char **data;
 305 int *flags;
 306         { return(get_error_values(1,file,line,data,flags)); }
 307
 308 unsigned long ERR_peek_error()
 309         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
 310
 311 unsigned long ERR_peek_error_line(file,line)
 312 char **file;
 313 int *line;
 314         { return(get_error_values(0,file,line,NULL,NULL)); }
 315
 316 unsigned long ERR_peek_error_line_data(file,line,data,flags)
 317 char **file;
 318 int *line;
 319 char **data;
 320 int *flags;
 321         { return(get_error_values(0,file,line,data,flags)); }
 322
 323 static unsigned long get_error_values(inc,file,line,data,flags)
 324 int inc;
 325 char **file;
 326 int *line;
 327 char **data;
 328 int *flags;
 329         {
 330         int i=0;
 331         ERR_STATE *es;
 332         unsigned long ret;
 333
 334         es=ERR_get_state();
 335
 336         if (es->bottom == es->top) return(0);
 337         i=(es->bottom+1)%ERR_NUM_ERRORS;
 338
 339         ret=es->err_buffer[i];
 340         if (inc)
 341                 {
 342                 es->bottom=i;
 343                 es->err_buffer[i]=0;
 344                 }
 345
 346         if ((file != NULL) && (line != NULL))
 347                 {
 348                 if (es->err_file[i] == NULL)
 349                         {
 350                         *file="NA";
 351                         if (line != NULL) *line=0;
 352                         }
 353                 else
 354                         {
 355                         *file=es->err_file[i];
 356                         if (line != NULL) *line=es->err_line[i];
 357                         }
 358                 }
 359
 360         if (data != NULL)
 361                 {
 362                 if (es->err_data[i] == NULL)
 363                         {
 364                         *data="";
 365                         if (flags != NULL) *flags=0;
 366                         }
 367                 else
 368                         {
 369                         *data=es->err_data[i];
 370                         if (flags != NULL) *flags=es->err_data_flags[i];
 371                         }
 372                 }
 373         return(ret);
 374         }
 375
 376 /* BAD for multi-threaded, uses a local buffer if ret == NULL */
 377 char *ERR_error_string(e,ret)
 378 unsigned long e;
 379 char *ret;
 380         {
 381         static char buf[256];
 382         char *ls,*fs,*rs;
 383         unsigned long l,f,r;
 384         int i;
 385
 386         l=ERR_GET_LIB(e);
 387         f=ERR_GET_FUNC(e);
 388         r=ERR_GET_REASON(e);
 389
 390         ls=ERR_lib_error_string(e);
 391         fs=ERR_func_error_string(e);
 392         rs=ERR_reason_error_string(e);
 393
 394         if (ret == NULL) ret=buf;
 395
 396         sprintf(&(ret[0]),"error:%08lX:",e);
 397         i=strlen(ret);
 398         if (ls == NULL)
 399                 sprintf(&(ret[i]),":lib(%lu) ",l);
 400         else    sprintf(&(ret[i]),"%s",ls);
 401         i=strlen(ret);
 402         if (fs == NULL)
 403                 sprintf(&(ret[i]),":func(%lu) ",f);
 404         else    sprintf(&(ret[i]),":%s",fs);
 405         i=strlen(ret);
 406         if (rs == NULL)
 407                 sprintf(&(ret[i]),":reason(%lu)",r);
 408         else    sprintf(&(ret[i]),":%s",rs);
 409
 410         return(ret);
 411         }
 412
 413 LHASH *ERR_get_string_table()
 414         {
 415         return(error_hash);
 416         }
 417
 418 LHASH *ERR_get_err_state_table()
 419         {
 420         return(thread_hash);
 421         }
 422
 423 char *ERR_lib_error_string(e)
 424 unsigned long e;
 425         {
 426         ERR_STRING_DATA d,*p=NULL;
 427         unsigned long l;
 428
 429         l=ERR_GET_LIB(e);
 430
 431         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 432
 433         if (error_hash != NULL)
 434                 {
 435                 d.error=ERR_PACK(l,0,0);
 436                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 437                 }
 438
 439         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 440
 441         return((p == NULL)?NULL:p->string);
 442         }
 443
 444 char *ERR_func_error_string(e)
 445 unsigned long e;
 446         {
 447         ERR_STRING_DATA d,*p=NULL;
 448         unsigned long l,f;
 449
 450         l=ERR_GET_LIB(e);
 451         f=ERR_GET_FUNC(e);
 452
 453         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 454
 455         if (error_hash != NULL)
 456                 {
 457                 d.error=ERR_PACK(l,f,0);
 458                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 459                 }
 460
 461         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 462
 463         return((p == NULL)?NULL:p->string);
 464         }
 465
 466 char *ERR_reason_error_string(e)
 467 unsigned long e;
 468         {
 469         ERR_STRING_DATA d,*p=NULL;
 470         unsigned long l,r;
 471
 472         l=ERR_GET_LIB(e);
 473         r=ERR_GET_REASON(e);
 474
 475         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 476
 477         if (error_hash != NULL)
 478                 {
 479                 d.error=ERR_PACK(l,0,r);
 480                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 481                 if (p == NULL)
 482                         {
 483                         d.error=ERR_PACK(0,0,r);
 484                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,
 485                                 (char *)&d);
 486                         }
 487                 }
 488
 489         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 490
 491         return((p == NULL)?NULL:p->string);
 492         }
 493
 494 static unsigned long err_hash(a)
 495 ERR_STRING_DATA *a;
 496         {
 497         unsigned long ret,l;
 498
 499         l=a->error;
 500         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
 501         return(ret^ret%19*13);
 502         }
 503
 504 static int err_cmp(a,b)
 505 ERR_STRING_DATA *a,*b;
 506         {
 507         return((int)(a->error-b->error));
 508         }
 509
 510 static unsigned long pid_hash(a)
 511 ERR_STATE *a;
 512         {
 513         return(a->pid*13);
 514         }
 515
 516 static int pid_cmp(a,b)
 517 ERR_STATE *a,*b;
 518         {
 519         return((int)((long)a->pid - (long)b->pid));
 520         }
 521
 522 void ERR_remove_state(pid)
 523 unsigned long pid;
 524         {
 525         ERR_STATE *p,tmp;
 526
 527         if (thread_hash == NULL)
 528                 return;
 529         if (pid == 0)
 530                 pid=(unsigned long)CRYPTO_thread_id();
 531         tmp.pid=pid;
 532         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 533         p=(ERR_STATE *)lh_delete(thread_hash,(char *)&tmp);
 534         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 535
 536         if (p != NULL) ERR_STATE_free(p);
 537         }
 538
 539 ERR_STATE *ERR_get_state()
 540         {
 541         static ERR_STATE fallback;
 542         ERR_STATE *ret=NULL,tmp,*tmpp;
 543         int i;
 544         unsigned long pid;
 545
 546         pid=(unsigned long)CRYPTO_thread_id();
 547
 548         CRYPTO_r_lock(CRYPTO_LOCK_ERR);
 549         if (thread_hash == NULL)
 550                 {
 551                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 552                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 553                 if (thread_hash == NULL)
 554                         {
 555                         MemCheck_off();
 556                         thread_hash=lh_new(pid_hash,pid_cmp);
 557                         MemCheck_on();
 558                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 559                         if (thread_hash == NULL) return(&fallback);
 560                         }
 561                 else
 562                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 563                 }
 564         else
 565                 {
 566                 tmp.pid=pid;
 567                 ret=(ERR_STATE *)lh_retrieve(thread_hash,(char *)&tmp);
 568                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 569                 }
 570
 571         /* ret == the error state, if NULL, make a new one */
 572         if (ret == NULL)
 573                 {
 574                 ret=(ERR_STATE *)Malloc(sizeof(ERR_STATE));
 575                 if (ret == NULL) return(&fallback);
 576                 ret->pid=pid;
 577                 ret->top=0;
 578                 ret->bottom=0;
 579                 for (i=0; i<ERR_NUM_ERRORS; i++)
 580                         {
 581                         ret->err_data[i]=NULL;
 582                         ret->err_data_flags[i]=0;
 583                         }
 584                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 585                 tmpp=(ERR_STATE *)lh_insert(thread_hash,(char *)ret);
 586                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 587                 if (tmpp != NULL) /* old entry - should not happen */
 588                         {
 589                         ERR_STATE_free(tmpp);
 590                         }
 591                 }
 592         return(ret);
 593         }
 594
 595 int ERR_get_next_error_library()
 596         {
 597         static int value=ERR_LIB_USER;
 598
 599         return(value++);
 600         }
 601
 602 void ERR_set_error_data(data,flags)
 603 char *data;
 604 int flags;
 605         {
 606         ERR_STATE *es;
 607         int i;
 608
 609         es=ERR_get_state();
 610
 611         i=es->top;
 612         if (i == 0)
 613                 i=ERR_NUM_ERRORS-1;
 614
 615         es->err_data[i]=data;
 616         es->err_data_flags[es->top]=flags;
 617         }
 618
 619 void ERR_add_error_data( VAR_PLIST(int , num))
 620 VAR_ALIST
 621         {
 622         VAR_BDEFN(args, int, num);
 623         int i,n,s;
 624         char *str,*p,*a;
 625
 626         s=64;
 627         str=Malloc(s+1);
 628         if (str == NULL) return;
 629         str[0]='\0';
 630
 631         VAR_INIT(args,int,num);
 632         n=0;
 633         for (i=0; i<num; i++)
 634                 {
 635                 VAR_ARG(args,char *,a);
 636                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 637                 if (a != NULL)
 638                         {
 639                         n+=strlen(a);
 640                         if (n > s)
 641                                 {
 642                                 s=n+20;
 643                                 p=Realloc(str,s+1);
 644                                 if (p == NULL)
 645                                         {
 646                                         Free(str);
 647                                         return;
 648                                         }
 649                                 else
 650                                         str=p;
 651                                 }
 652                         strcat(str,a);
 653                         }
 654                 }
 655         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
 656
 657         VAR_END( args );
 658         }
 659