108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2009 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "gdsroot.h"
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#include "gtm_facility.h"
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#include "fileinfo.h"
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#include "gdsbt.h"
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#include "gdsfhead.h"
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#include "gdsblk.h"
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#include "copy.h"
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#include "util.h"
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#include "cli.h"
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#include "skan_offset.h"
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#define MAX_UTIL_LEN 80
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GBLREF block_id patch_curr_blk;
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GBLREF sgmnt_addrs *cs_addrs;
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GBLREF char patch_comp_key[MAX_KEY_SZ + 1];
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GBLREF unsigned char patch_comp_count;
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GBLREF int patch_rec_counter;
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sm_uc_ptr_t skan_offset (sm_uc_ptr_t bp, bool over_run)
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{
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sm_uc_ptr_t b_top, rp, r_top, rp_targ, key_top;
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char util_buff[MAX_UTIL_LEN];
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unsigned char cc;
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short int size, rec_size;
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uint4 offset;
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if (((blk_hdr_ptr_t) bp)->bsiz > cs_addrs->hdr->blk_size)
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b_top = bp + cs_addrs->hdr->blk_size;
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else if (((blk_hdr_ptr_t) bp)->bsiz < SIZEOF(blk_hdr))
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b_top = bp + SIZEOF(blk_hdr);
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else
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b_top = bp + ((blk_hdr_ptr_t) bp)->bsiz;
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if (!cli_get_hex("OFFSET", &offset))
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return 0;
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if (offset < SIZEOF(blk_hdr))
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{
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util_out_print("Error: offset less than blk header",TRUE);
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return 0;
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}
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rp_targ = bp + offset;
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if (rp_targ > b_top)
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{
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memcpy(util_buff, "Error: offset greater than blk size of ", 39);
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util_buff[ i2hex_nofill((int4)(b_top - bp), (uchar_ptr_t)&util_buff[39], 8) + 39 ] = 0;
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util_out_print(&util_buff[0],TRUE);
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return 0;
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}
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patch_rec_counter = 1;
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patch_comp_key[0] = patch_comp_key[1] = 0;
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for (rp = bp + SIZEOF(blk_hdr); rp < rp_targ ; )
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{
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GET_SHORT(rec_size, &((rec_hdr_ptr_t)rp)->rsiz);
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if (rec_size < SIZEOF(rec_hdr))
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r_top = rp + SIZEOF(rec_hdr);
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else
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r_top = rp + rec_size;
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if (r_top >= b_top)
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{
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if (!over_run)
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return rp;
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r_top = b_top;
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}
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if (r_top > rp_targ)
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return rp;
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patch_rec_counter++;
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if (((blk_hdr_ptr_t) bp)->levl)
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key_top = r_top - SIZEOF(block_id);
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else
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{
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for (key_top = rp + SIZEOF(rec_hdr); key_top < r_top ; )
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if (!*key_top++ && !*key_top++)
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break;
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}
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if (((rec_hdr_ptr_t) rp)->cmpc > patch_comp_count)
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cc = patch_comp_count;
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else
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cc = ((rec_hdr_ptr_t) rp)->cmpc;
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size = key_top - rp - SIZEOF(rec_hdr);
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if (size > SIZEOF(patch_comp_key) - 2 - cc)
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size = SIZEOF(patch_comp_key) - 2 - cc;
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if (size < 0)
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size = 0;
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memcpy(&patch_comp_key[cc], rp + SIZEOF(rec_hdr), size);
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patch_comp_count = cc + size;
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rp = r_top;
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}
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return rp;
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}
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