X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=odr%2Fber_tag.c;h=03b9c79b4fea0633bd3806c52752f6675140c971;hp=1c5368649ce5cb41a2667aad32142f2323cc8626;hb=19af2bd8dfd21731cc978beccd1346133d614c67;hpb=6d0cb38e2fd32c722b0af63ce050ac5c458d849f diff --git a/odr/ber_tag.c b/odr/ber_tag.c index 1c53686..03b9c79 100644 --- a/odr/ber_tag.c +++ b/odr/ber_tag.c @@ -1,10 +1,66 @@ /* - * Copyright (C) 1994, Index Data I/S - * All rights reserved. + * Copyright (c) 1995-2000, Index Data + * See the file LICENSE for details. * Sebastian Hammer, Adam Dickmeiss * * $Log: ber_tag.c,v $ - * Revision 1.5 1995-02-10 18:57:24 quinn + * Revision 1.22 2000-02-29 13:44:55 adam + * Check for config.h (currently not generated). + * + * Revision 1.21 2000/01/31 13:15:21 adam + * Removed uses of assert(3). Cleanup of ODR. CCL parser update so + * that some characters are not surrounded by spaces in resulting term. + * ILL-code updates. + * + * Revision 1.20 1999/11/30 13:47:11 adam + * Improved installation. Moved header files to include/yaz. + * + * Revision 1.19 1999/01/08 11:23:25 adam + * Added const modifier to some of the BER/ODR encoding routines. + * + * Revision 1.18 1998/02/11 11:53:34 adam + * Changed code so that it compiles as C++. + * + * Revision 1.17 1997/09/30 09:33:10 adam + * Minor changes - removed indentation of ifdef. + * + * 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. + * + * 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 @@ -20,115 +76,150 @@ * First kick. * */ +#if HAVE_CONFIG_H +#include +#endif #include -#include +#include /* 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 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; + char **pp = (char **)p; if (o->direction == ODR_DECODE) *pp = 0; o->t_class = -1; - if (o->buf == o->bp) /* This is insurance. It shouldn't be necessary */ - lclass = -1; + if (o->stackp < 0) + { + odr_seek(o, ODR_S_SET, 0); + o->top = 0; + o->bp = o->buf; + odr_ber_tag->lclass = -1; + } switch (o->direction) { case ODR_ENCODE: - if (!*pp) - return 0; - if ((rd = ber_enctag(o->bp, class, tag, *constructed, o->left)) - <=0) - return -1; - o->bp += rd; - o->left -= rd; + 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]", class, tag, - *constructed); + 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)) - return 0; - if (lclass < 0) - { - if ((br = ber_dectag(o->bp, &lclass, <ag, &lcons)) <= 0) - 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]", lclass, ltag, - lcons); + 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 - return 0; - case ODR_PRINT: return *pp != 0; - default: 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) + o->error = OREQUIRED; + return 0; + } + case ODR_PRINT: + 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(unsigned char *buf, int class, int tag, int constructed, int len) +int ber_enctag(ODR o, int zclass, int tag, int constructed) { int cons = (constructed ? 1 : 0), n = 0; - unsigned char octs[sizeof(int)], *b = buf; + unsigned char octs[sizeof(int)], b; - *b = (class << 6) & 0XC0; - *b |= (cons << 5) & 0X20; + b = (zclass << 6) & 0XC0; + b |= (cons << 5) & 0X20; if (tag <= 30) { - *b |= tag & 0X1F; + b |= tag & 0X1F; + if (odr_putc(o, b) < 0) + return -1; return 1; } else { - *(b++) |= 0x1F; + b |= 0X1F; + if (odr_putc(o, b) < 0) + return -1; do { octs[n++] = tag & 0X7F; tag >>= 7; - if (n >= len) /* bounds check */ - return -1; } while (tag); while (n--) - *(b++) = octs[n] | ((n > 0) << 7); - return b - buf; + { + unsigned char oo; + + oo = octs[n] | ((n > 0) << 7); + if (odr_putc(o, oo) < 0) + return -1; + } + return 0; } } /* 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 *buf, int *zclass, int *tag, int *constructed) { - unsigned char *b = buf; + const unsigned char *b = buf; - *class = *b >> 6; + *zclass = *b >> 6; *constructed = (*b >> 5) & 0X01; if ((*tag = *b & 0x1F) <= 30) return 1;