75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2011 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 "lv_val.h"
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#include "stringpool.h"
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#include "op.h"
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#include "min_max.h"
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GBLREF spdesc stringpool;
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GBLREF symval *curr_symval;
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void op_fnlvname(mval *src, boolean_t return_undef_aliases, mval *dst)
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{
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ht_ent_mname *p, *min, *top;
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int n;
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mident name;
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lv_val *lv;
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MV_FORCE_STR(src);
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name.addr = src->str.addr;
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name.len = (MAX_MIDENT_LEN > src->str.len) ? src->str.len : MAX_MIDENT_LEN;
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p = curr_symval->h_symtab.base;
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top = p + curr_symval->h_symtab.size;
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assert(top == curr_symval->h_symtab.top);
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min = 0;
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for ( ; p < top ; p++)
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{
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if (HTENT_VALID_MNAME(p, lv_val, lv) && '$' != *p->key.var_name.addr) /* Avoid $ZWRTAC* variables in tree */
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{
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if (lv && (LV_IS_VAL_DEFINED(lv)
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|| LV_HAS_CHILD(lv)
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|| (return_undef_aliases && ((1 < lv->stats.trefcnt) || (0 < lv->stats.crefcnt)))))
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{
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MIDENT_CMP(&name, &p->key.var_name, n);
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if (0 > n)
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{
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if (!min)
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min = p;
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else
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{
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MIDENT_CMP(&min->key.var_name, &p->key.var_name, n);
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if (0 < n)
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min = p;
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}
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}
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}
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}
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}
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dst->mvtype = 0; /* so stp_gcol (if invoked below) can free up space currently occupied by this to-be-overwritten mval */
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if (min)
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{
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n = min->key.var_name.len;
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ENSURE_STP_FREE_SPACE(n);
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memcpy(stringpool.free, min->key.var_name.addr, n);
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dst->str.len = n;
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dst->str.addr = (char *)stringpool.free;
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stringpool.free += n;
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} else
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dst->str.len = 0;
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dst->mvtype = MV_STR; /* initialize mvtype now that dst mval has been otherwise completely set up */
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}
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