147 lines
2.8 KiB
C
147 lines
2.8 KiB
C
/*
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* $Id: env.c 215 2008-06-19 10:27:37Z baconevi $
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*
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* {License}
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*/
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#include "lsp_i.h"
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/* TODO: make the frame hash accessible */
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static ase_lsp_assoc_t* __new_assoc (
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ase_lsp_t* lsp, ase_lsp_obj_t* name,
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ase_lsp_obj_t* value, ase_lsp_obj_t* func)
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{
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ase_lsp_assoc_t* assoc;
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assoc = (ase_lsp_assoc_t*)
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ASE_LSP_MALLOC (lsp, sizeof(ase_lsp_assoc_t));
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if (assoc == ASE_NULL)
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{
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ase_lsp_seterror (lsp, ASE_LSP_ENOMEM, ASE_NULL, 0);
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return ASE_NULL;
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}
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assoc->name = name;
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assoc->value = value;
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assoc->func = func;
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assoc->link = ASE_NULL;
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return assoc;
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}
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ase_lsp_frame_t* ase_lsp_newframe (ase_lsp_t* lsp)
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{
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ase_lsp_frame_t* frame;
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frame = (ase_lsp_frame_t*)
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ASE_LSP_MALLOC (lsp, sizeof(ase_lsp_frame_t));
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if (frame == ASE_NULL)
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{
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ase_lsp_seterror (lsp, ASE_LSP_ENOMEM, ASE_NULL, 0);
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return ASE_NULL;
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}
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frame->assoc = ASE_NULL;
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frame->link = ASE_NULL;
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return frame;
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}
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void ase_lsp_freeframe (ase_lsp_t* lsp, ase_lsp_frame_t* frame)
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{
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ase_lsp_assoc_t* assoc, * link;
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/* destroy the associations */
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assoc = frame->assoc;
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while (assoc != ASE_NULL)
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{
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link = assoc->link;
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ASE_LSP_FREE (lsp, assoc);
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assoc = link;
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}
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ASE_LSP_FREE (lsp, frame);
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}
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ase_lsp_assoc_t* ase_lsp_lookupinframe (
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ase_lsp_t* lsp, ase_lsp_frame_t* frame, ase_lsp_obj_t* name)
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{
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ase_lsp_assoc_t* assoc;
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ASE_ASSERT (ASE_LSP_TYPE(name) == ASE_LSP_OBJ_SYM);
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assoc = frame->assoc;
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while (assoc != ASE_NULL)
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{
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if (name == assoc->name) return assoc;
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assoc = assoc->link;
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}
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return ASE_NULL;
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}
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ase_lsp_assoc_t* ase_lsp_insvalueintoframe (
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ase_lsp_t* lsp, ase_lsp_frame_t* frame,
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ase_lsp_obj_t* name, ase_lsp_obj_t* value)
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{
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ase_lsp_assoc_t* assoc;
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ASE_ASSERT (ASE_LSP_TYPE(name) == ASE_LSP_OBJ_SYM);
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assoc = __new_assoc (lsp, name, value, ASE_NULL);
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if (assoc == ASE_NULL) return ASE_NULL;
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assoc->link = frame->assoc;
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frame->assoc = assoc;
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return assoc;
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}
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ase_lsp_assoc_t* ase_lsp_insfuncintoframe (
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ase_lsp_t* lsp, ase_lsp_frame_t* frame,
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ase_lsp_obj_t* name, ase_lsp_obj_t* func)
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{
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ase_lsp_assoc_t* assoc;
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ASE_ASSERT (ASE_LSP_TYPE(name) == ASE_LSP_OBJ_SYM);
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assoc = __new_assoc (lsp, name, ASE_NULL, func);
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if (assoc == ASE_NULL) return ASE_NULL;
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assoc->link = frame->assoc;
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frame->assoc = assoc;
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return assoc;
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}
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ase_lsp_tlink_t* ase_lsp_pushtmp (ase_lsp_t* lsp, ase_lsp_obj_t* obj)
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{
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ase_lsp_tlink_t* tlink;
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tlink = (ase_lsp_tlink_t*)
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ASE_LSP_MALLOC (lsp, sizeof(ase_lsp_tlink_t));
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if (tlink == ASE_NULL)
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{
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ase_lsp_seterror (lsp, ASE_LSP_ENOMEM, ASE_NULL, 0);
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return ASE_NULL;
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}
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tlink->obj = obj;
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tlink->link = lsp->mem->tlink;
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lsp->mem->tlink = tlink;
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lsp->mem->tlink_count++;
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return tlink;
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}
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void ase_lsp_poptmp (ase_lsp_t* lsp)
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{
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ase_lsp_tlink_t* top;
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ASE_ASSERT (lsp->mem->tlink != ASE_NULL);
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top = lsp->mem->tlink;
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lsp->mem->tlink = top->link;
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lsp->mem->tlink_count--;
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ASE_LSP_FREE (lsp, top);
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}
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