85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/*
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* $Id: symbol.c,v 1.18 2005-07-19 15:52:19 bacon Exp $
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*/
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#include <xp/stx/symbol.h>
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#include <xp/stx/object.h>
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#include <xp/stx/misc.h>
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xp_word_t xp_stx_new_symlink (xp_stx_t* stx, xp_word_t symbol)
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{
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xp_word_t x;
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x = xp_stx_alloc_word_object(
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stx, XP_NULL, XP_STX_SYMLINK_SIZE, XP_NULL, 0);
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XP_STX_CLASS(stx,x) = stx->class_symlink;
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XP_STX_WORD_AT(stx,x,XP_STX_SYMLINK_LINK) = stx->nil;
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XP_STX_WORD_AT(stx,x,XP_STX_SYMLINK_SYMBOL) = symbol;
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return x;
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}
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xp_word_t xp_stx_new_symbol (xp_stx_t* stx, const xp_char_t* name)
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{
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return xp_stx_new_symbolx (stx, name, xp_strlen(name));
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}
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xp_word_t xp_stx_new_symbolx (
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xp_stx_t* stx, const xp_char_t* name, xp_word_t len)
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{
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xp_word_t x, hash, table, link, next;
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table = stx->symbol_table;
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hash = xp_stx_strxhash(name,len) % XP_STX_SIZE(stx,table);
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link = XP_STX_WORD_AT(stx,table,hash);
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if (link == stx->nil) {
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x = xp_stx_alloc_char_objectx (stx, name, len);
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XP_STX_CLASS(stx,x) = stx->class_symbol;
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XP_STX_WORD_AT(stx,table,hash) = xp_stx_new_symlink(stx,x);
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}
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else {
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do {
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x = XP_STX_WORD_AT(stx,link,XP_STX_SYMLINK_SYMBOL);
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xp_assert (xp_stx_classof(stx,x) == stx->class_symbol);
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if (xp_strxcmp (
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XP_STX_DATA(stx,x),
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XP_STX_SIZE(stx,x), name) == 0) return x;
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next = XP_STX_WORD_AT(stx,link,XP_STX_SYMLINK_LINK);
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if (next == stx->nil) {
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x = xp_stx_alloc_char_objectx (stx, name, len);
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XP_STX_CLASS(stx,x) = stx->class_symbol;
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XP_STX_WORD_AT(stx,link,XP_STX_SYMLINK_LINK) =
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xp_stx_new_symlink(stx,x);
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break;
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}
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link = next;
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} while (1);
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}
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return x;
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}
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void xp_stx_traverse_symbol_table (
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xp_stx_t* stx, void (*func) (xp_stx_t*,xp_word_t,void*), void* data)
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{
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xp_word_t link;
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xp_word_t size;
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xp_word_t table;
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table = stx->symbol_table;
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size = XP_STX_SIZE(stx,table);
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while (size-- > 0) {
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link = XP_STX_WORD_AT(stx,table,size);
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while (link != stx->nil) {
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func (stx, XP_STX_WORD_AT(stx,link,XP_STX_SYMLINK_SYMBOL), data);
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link = XP_STX_WORD_AT(stx,link,XP_STX_SYMLINK_LINK);
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}
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}
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}
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