X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=odr%2Fber_tag.c;h=98b8a95c13d03127e887041e7b5a87520c0b9ddd;hb=0442642bb213139271943552e5c1bc731ee96872;hp=49c1a34505be35345442b2352370e06a2bb3fc31;hpb=aa82967af8f06004b567ad1ed40c67b056c44e7b;p=yaz-moved-to-github.git diff --git a/odr/ber_tag.c b/odr/ber_tag.c index 49c1a34..98b8a95 100644 --- a/odr/ber_tag.c +++ b/odr/ber_tag.c @@ -1,139 +1,132 @@ /* - * Copyright (C) 1994, Index Data I/S - * All rights reserved. + * Copyright (c) 1995-2003, Index Data + * See the file LICENSE for details. * Sebastian Hammer, Adam Dickmeiss * - * $Log: ber_tag.c,v $ - * Revision 1.10 1995-04-18 08:15:18 quinn - * Added dynamic memory allocation on encoding (whew). Code is now somewhat - * neater. We'll make the same change for decoding one day. - * - * Revision 1.9 1995/03/15 08:37:18 quinn - * Fixed protocol bugs. - * - * Revision 1.8 1995/03/10 11:44:40 quinn - * Fixed serious stack-bug in odr_cons_begin - * - * Revision 1.7 1995/03/08 12:12:13 quinn - * Added better error checking. - * - * Revision 1.6 1995/02/14 11:54:33 quinn - * Adjustments. - * - * Revision 1.5 1995/02/10 18:57:24 quinn - * More in the way of error-checking. - * - * Revision 1.4 1995/02/10 15:55:28 quinn - * Bug fixes, mostly. - * - * Revision 1.3 1995/02/09 15:51:46 quinn - * Works better now. - * - * Revision 1.2 1995/02/07 17:52:59 quinn - * A damn mess, but now things work, I think. - * - * Revision 1.1 1995/02/02 16:21:53 quinn - * First kick. - * + * $Id: ber_tag.c,v 1.27 2003-05-24 19:20:14 adam Exp $ */ +#if HAVE_CONFIG_H +#include +#endif #include -#include +#include "odr-priv.h" /* ber_tag * On encoding: * if p: write tag. return 1 (success) or -1 (error). * if !p: return 0. * On decoding: - * if tag && class match up, advance pointer and return 1. set cons. + * if tag && zclass match up, advance pointer and return 1. set cons. * else leave pointer unchanged. Return 0. * * Should perhaps be odr_tag? -*/ -int ber_tag(ODR o, void *p, int class, int tag, int *constructed, int opt) + */ +int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt, + const char *name) { - static int lclass = -1, ltag, br, lcons; /* save t&c rather than - decoding twice */ + struct Odr_ber_tag *odr_ber_tag = &o->op->odr_ber_tag; int rd; - char **pp = p; + char **pp = (char **)p; if (o->direction == ODR_DECODE) *pp = 0; o->t_class = -1; - if (o->stackp < 0) + if (o->op->stackp < 0) { odr_seek(o, ODR_S_SET, 0); - o->ecb.top = 0; + o->top = 0; o->bp = o->buf; - lclass = -1; + odr_ber_tag->lclass = -1; } switch (o->direction) { - case ODR_ENCODE: - if (!*pp) - { - if (!opt) - o->error = OREQUIRED; - return 0; - } - if ((rd = ber_enctag(o, class, tag, *constructed)) < 0) - return -1; + case ODR_ENCODE: + if (!*pp) + { + if (!opt) + { + odr_seterror(o, OREQUIRED, 24); + odr_setelement (o, name); + } + return 0; + } + if ((rd = ber_enctag(o, zclass, tag, *constructed)) < 0) + return -1; #ifdef ODR_DEBUG - fprintf(stderr, "\n[class=%d,tag=%d,cons=%d,stackp=%d]", class, tag, - *constructed, o->stackp); + fprintf(stderr, "\n[class=%d,tag=%d,cons=%d,stackp=%d]", zclass, tag, + *constructed, o->stackp); #endif - return 1; - case ODR_DECODE: - if (o->stackp > -1 && !odr_constructed_more(o)) - { - if (!opt) - o->error = OREQUIRED; - return 0; - } - if (lclass < 0) - { - if ((br = ber_dectag(o->bp, &lclass, <ag, &lcons)) <= 0) - { - o->error = OPROTO; - return 0; - } + return 1; + + case ODR_DECODE: + if (o->op->stackp > -1 && !odr_constructed_more(o)) + { + if (!opt) + { + odr_seterror(o, OREQUIRED, 25); + odr_setelement(o, name); + } + return 0; + } + if (odr_ber_tag->lclass < 0) + { + if ((odr_ber_tag->br = + ber_dectag(o->bp, &odr_ber_tag->lclass, + &odr_ber_tag->ltag, &odr_ber_tag->lcons, + odr_max(o))) <= 0) + { + odr_seterror(o, OPROTO, 26); + odr_setelement(o, name); + return 0; + } #ifdef ODR_DEBUG - fprintf(stderr, "\n[class=%d,tag=%d,cons=%d,stackp=%d]", lclass, ltag, - lcons, o->stackp); + fprintf(stderr, + "\n[class=%d,tag=%d,cons=%d,stackp=%d]", + odr_ber_tag->lclass, odr_ber_tag->ltag, + odr_ber_tag->lcons, o->stackp); #endif - } - if (class == lclass && tag == ltag) - { - o->bp += br; - o->left -= br; - *constructed = lcons; - lclass = -1; - return 1; - } - else - { - if (!opt) - o->error = OREQUIRED; - return 0; - } - case ODR_PRINT: - if (!*pp && !opt) - o->error = OREQUIRED; - return *pp != 0; - default: o->error = OOTHER; return 0; + } + if (zclass == odr_ber_tag->lclass && tag == odr_ber_tag->ltag) + { + o->bp += odr_ber_tag->br; + *constructed = odr_ber_tag->lcons; + odr_ber_tag->lclass = -1; + return 1; + } + else + { + if (!opt) + { + odr_seterror(o, OREQUIRED, 27); + odr_setelement(o, name); + } + return 0; + } + case ODR_PRINT: + if (!*pp && !opt) + { + odr_seterror(o,OREQUIRED, 28); + odr_setelement(o, name); + } + return *pp != 0; + default: + odr_seterror(o, OOTHER, 29); + odr_setelement(o, name); + return 0; } } /* ber_enctag - * BER-encode a class/tag/constructed package (identifier octets). Return + * BER-encode a zclass/tag/constructed package (identifier octets). Return * number of bytes encoded, or -1 if out of bounds. */ -int ber_enctag(ODR o, int class, int tag, int constructed) +int ber_enctag(ODR o, int zclass, int tag, int constructed) { int cons = (constructed ? 1 : 0), n = 0; unsigned char octs[sizeof(int)], b; - b = (class << 6) & 0XC0; + b = (zclass << 6) & 0XC0; b |= (cons << 5) & 0X20; if (tag <= 30) { @@ -168,23 +161,26 @@ int ber_enctag(ODR o, int class, int tag, int constructed) /* ber_dectag * Decode BER identifier octets. Return number of bytes read or -1 for error. */ -int ber_dectag(unsigned char *buf, int *class, int *tag, int *constructed) +int ber_dectag(const unsigned char *b, int *zclass, int *tag, + int *constructed, int max) { - unsigned char *b = buf; + int l = 1; + + if (l > max) + return -1; - *class = *b >> 6; + *zclass = *b >> 6; *constructed = (*b >> 5) & 0X01; if ((*tag = *b & 0x1F) <= 30) return 1; - b++; *tag = 0; do { + if (l >= max) + return -1; *tag <<= 7; - *tag |= *b & 0X7F; - if (b - buf >= 5) /* Precaution */ - return -1; + *tag |= b[l] & 0X7F; } - while (*(b++) & 0X80); - return b - buf; + while (b[l++] & 0X80); + return l; }