X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=odr%2Fber_tag.c;h=9e7291aae26da73d6a125dabe137c728badc61a9;hb=113640450c45ca7ac96285cc8ca666bfd597ed21;hp=49c1a34505be35345442b2352370e06a2bb3fc31;hpb=aa82967af8f06004b567ad1ed40c67b056c44e7b;p=yaz-moved-to-github.git diff --git a/odr/ber_tag.c b/odr/ber_tag.c index 49c1a34..9e7291a 100644 --- a/odr/ber_tag.c +++ b/odr/ber_tag.c @@ -1,10 +1,30 @@ /* - * Copyright (C) 1994, Index Data I/S - * All rights reserved. + * Copyright (c) 1995-1997, 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 + * Revision 1.16 1997-09-17 12:10:33 adam + * YAZ version 1.4. + * + * Revision 1.15 1997/09/01 08:51:06 adam + * New windows NT/95 port using MSV5.0. Had to avoid a few static + * variables used in function ber_tag. These are now part of the + * ODR structure. + * + * Revision 1.14 1997/05/14 06:53:56 adam + * C++ support. + * + * Revision 1.13 1995/09/29 17:12:21 quinn + * Smallish + * + * Revision 1.12 1995/09/27 15:02:57 quinn + * Modified function heads & prototypes. + * + * Revision 1.11 1995/05/16 08:50:48 quinn + * License, documentation, and memory fixes + * + * 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. * @@ -45,15 +65,14 @@ * 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) { - static int lclass = -1, ltag, br, lcons; /* save t&c rather than - decoding twice */ + Odr_ber_tag *odr_ber_tag = &o->odr_ber_tag; int rd; char **pp = p; @@ -63,77 +82,81 @@ int ber_tag(ODR o, void *p, int class, int tag, int *constructed, int opt) if (o->stackp < 0) { odr_seek(o, ODR_S_SET, 0); - o->ecb.top = 0; + o->ecb.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; + if (!*pp) + { + if (!opt) + o->error = OREQUIRED; + 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; + 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; - } -#ifdef ODR_DEBUG - fprintf(stderr, "\n[class=%d,tag=%d,cons=%d,stackp=%d]", lclass, ltag, - 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; - } + if (o->stackp > -1 && !odr_constructed_more(o)) + { + if (!opt) + o->error = OREQUIRED; + 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)) <= 0) + { + o->error = OPROTO; + return 0; + } + #ifdef ODR_DEBUG + 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 (zclass == odr_ber_tag->lclass && tag == odr_ber_tag->ltag) + { + o->bp += odr_ber_tag->br; + o->left -= odr_ber_tag->br; + *constructed = odr_ber_tag->lcons; + odr_ber_tag->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 (!*pp && !opt) + o->error = OREQUIRED; + return *pp != 0; + default: + o->error = OOTHER; + 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) { @@ -168,11 +191,11 @@ 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(unsigned char *buf, int *zclass, int *tag, int *constructed) { unsigned char *b = buf; - *class = *b >> 6; + *zclass = *b >> 6; *constructed = (*b >> 5) & 0X01; if ((*tag = *b & 0x1F) <= 30) return 1;