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improving function block and control block handling in the compiler code

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This commit is contained in:
hyung-hwan 2021-04-09 08:22:40 +00:00
parent 8aa9ada771
commit 08149767b5
5 changed files with 128 additions and 53 deletions
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135
lib/comp.c
View File

@ -189,25 +189,24 @@ static int find_temporary_variable_backward (hcl_t* hcl, const hcl_oocs_t* name,
return __find_word_in_string(&hcl->c->tv.s, name, 1, index); return __find_word_in_string(&hcl->c->tv.s, name, 1, index);
} }
static int push_fnblk (hcl_t* hcl, hcl_cnode_t* cmd, hcl_oow_t tmpr_count, hcl_oow_t tmpr_len, hcl_oow_t lfbase) static int push_fnblk (hcl_t* hcl, const hcl_ioloc_t* errloc, hcl_oow_t tmpr_count, hcl_oow_t tmpr_len, hcl_oow_t lfbase)
{ {
HCL_ASSERT (hcl, hcl->c->fnblk.depth >= 0); hcl_oow_t new_depth;
HCL_ASSERT (hcl, hcl->c->fnblk.depth >= -1);
if (hcl->c->fnblk.depth == HCL_TYPE_MAX(hcl_ooi_t)) if (hcl->c->fnblk.depth == HCL_TYPE_MAX(hcl_ooi_t))
{ {
if (cmd) hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, errloc, HCL_NULL, "function block depth too deep");
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, HCL_CNODE_GET_LOC(src), HCL_NULL, "function block depth too deep in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
else
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, HCL_NULL, HCL_NULL, "function block depth too deep");
return -1; return -1;
} }
new_depth = hcl->c->fnblk.depth + 1;
if (hcl->c->fnblk.depth >= hcl->c->fnblk.info_capa) if (hcl->c->fnblk.depth >= hcl->c->fnblk.info_capa)
{ {
hcl_fnblk_info_t* tmp; hcl_fnblk_info_t* tmp;
hcl_oow_t newcapa; hcl_oow_t newcapa;
newcapa = HCL_ALIGN(hcl->c->fnblk.depth + 1, BLK_INFO_BUFFER_ALIGN); newcapa = HCL_ALIGN(new_depth + 1, BLK_INFO_BUFFER_ALIGN);
tmp = (hcl_fnblk_info_t*)hcl_reallocmem(hcl, hcl->c->fnblk.info, newcapa * HCL_SIZEOF(*tmp)); tmp = (hcl_fnblk_info_t*)hcl_reallocmem(hcl, hcl->c->fnblk.info, newcapa * HCL_SIZEOF(*tmp));
if (HCL_UNLIKELY(!tmp)) return -1; if (HCL_UNLIKELY(!tmp)) return -1;
@ -215,13 +214,16 @@ static int push_fnblk (hcl_t* hcl, hcl_cnode_t* cmd, hcl_oow_t tmpr_count, hcl_o
hcl->c->fnblk.info = tmp; hcl->c->fnblk.info = tmp;
} }
HCL_MEMSET (&hcl->c->fnblk.info[hcl->c->fnblk.depth], 0, HCL_SIZEOF(hcl->c->fnblk.info[hcl->c->fnblk.depth])); HCL_MEMSET (&hcl->c->fnblk.info[new_depth], 0, HCL_SIZEOF(hcl->c->fnblk.info[new_depth]));
hcl->c->fnblk.info[hcl->c->fnblk.depth].tmprlen = tmpr_len; hcl->c->fnblk.info[new_depth].tmprlen = tmpr_len;
hcl->c->fnblk.info[hcl->c->fnblk.depth].tmprcnt = tmpr_count; hcl->c->fnblk.info[new_depth].tmprcnt = tmpr_count;
hcl->c->fnblk.info[hcl->c->fnblk.depth].lfbase = lfbase;
hcl->c->fnblk.info[hcl->c->fnblk.depth].cblk_base = hcl->c->cblk.depth; /* remember the control block depth before the function block is entered */
hcl->c->fnblk.info[new_depth].cblk_base = hcl->c->cblk.depth;
hcl->c->fnblk.info[new_depth].lfbase = lfbase;
hcl->c->fnblk.depth = new_depth;
return 0; return 0;
} }
@ -234,25 +236,34 @@ static void pop_fnblk (hcl_t* hcl)
hcl->c->tv.s.len = hcl->c->fnblk.info[hcl->c->fnblk.depth].tmprlen; hcl->c->tv.s.len = hcl->c->fnblk.info[hcl->c->fnblk.depth].tmprlen;
hcl->c->tv.wcount = hcl->c->fnblk.info[hcl->c->fnblk.depth].tmprcnt; hcl->c->tv.wcount = hcl->c->fnblk.info[hcl->c->fnblk.depth].tmprcnt;
/* if pop_cblk() has been called properly, the following assertion must be true
* and the assignment on the next line isn't necessary */
HCL_ASSERT (hcl, hcl->c->cblk.depth == hcl->c->fnblk.info[hcl->c->fnblk.depth].cblk_base);
hcl->c->cblk.depth = hcl->c->fnblk.info[hcl->c->fnblk.depth].cblk_base; hcl->c->cblk.depth = hcl->c->fnblk.info[hcl->c->fnblk.depth].cblk_base;
/* keep hcl->code.lit.len without restoration */
} }
} }
static int push_cblk (hcl_t* hcl, hcl_cnode_t* cmd, hcl_cblk_type_t type) static int push_cblk (hcl_t* hcl, const hcl_ioloc_t* errloc, hcl_cblk_type_t type)
{ {
hcl_oow_t new_depth;
HCL_ASSERT (hcl, hcl->c->cblk.depth >= -1);
if (hcl->c->cblk.depth == HCL_TYPE_MAX(hcl_ooi_t)) if (hcl->c->cblk.depth == HCL_TYPE_MAX(hcl_ooi_t))
{ {
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, HCL_CNODE_GET_LOC(src), HCL_NULL, "control block depth too deep in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd)); hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, errloc, HCL_NULL, "control block depth too deep");
return -1; return -1;
} }
new_depth = hcl->c->cblk.depth + 1;
if (hcl->c->cblk.depth >= hcl->c->cblk.info_capa) if (hcl->c->cblk.depth >= hcl->c->cblk.info_capa)
{ {
hcl_cblk_info_t* tmp; hcl_cblk_info_t* tmp;
hcl_oow_t newcapa; hcl_oow_t newcapa;
/* +2 to indicate +1 after increment */ newcapa = HCL_ALIGN(new_depth + 1, BLK_INFO_BUFFER_ALIGN);
newcapa = HCL_ALIGN(hcl->c->cblk.depth + 2, BLK_INFO_BUFFER_ALIGN);
tmp = (hcl_cblk_info_t*)hcl_reallocmem(hcl, hcl->c->cblk.info, newcapa * HCL_SIZEOF(*tmp)); tmp = (hcl_cblk_info_t*)hcl_reallocmem(hcl, hcl->c->cblk.info, newcapa * HCL_SIZEOF(*tmp));
if (HCL_UNLIKELY(!tmp)) return -1; if (HCL_UNLIKELY(!tmp)) return -1;
@ -260,18 +271,22 @@ static int push_cblk (hcl_t* hcl, hcl_cnode_t* cmd, hcl_cblk_type_t type)
hcl->c->cblk.info = tmp; hcl->c->cblk.info = tmp;
} }
HCL_MEMSET (&hcl->c->cblk.info[new_depth], 0, HCL_SIZEOF(hcl->c->cblk.info[new_depth]));
hcl->c->cblk.depth++; hcl->c->cblk.info[new_depth]._type = type;
hcl->c->cblk.depth = new_depth;
HCL_MEMSET (&hcl->c->cblk.info[hcl->c->cblk.depth], 0, HCL_SIZEOF(hcl->c->fnblk.info[hcl->c->cblk.depth]));
hcl->c->cblk.info[hcl->c->cblk.depth]._type = type;
return 0; return 0;
} }
static void pop_cblk (hcl_t* hcl) static void pop_cblk (hcl_t* hcl)
{ {
HCL_ASSERT (hcl, hcl->c->cblk.depth >= 0); HCL_ASSERT (hcl, hcl->c->cblk.depth >= 0);
/* a control block stays inside a function block.
* the control block stack must not be popped past the starting base
* of the owning function block */
HCL_ASSERT (hcl, hcl->c->cblk.depth - 1 >= hcl->c->fnblk.info[hcl->c->fnblk.depth].cblk_base);
hcl->c->cblk.depth--; hcl->c->cblk.depth--;
} }
/* ========================================================================= */ /* ========================================================================= */
@ -1113,6 +1128,25 @@ static int compile_break (hcl_t* hcl, hcl_cnode_t* src)
return -1; return -1;
} }
for (i = hcl->c->cblk.depth; i > hcl->c->fnblk.info[hcl->c->fnblk.depth].cblk_base; --i)
{
if (hcl->c->cblk.info[i]._type == HCL_CBLK_TYPE_LOOP)
{
goto inside_loop;
}
else if (hcl->c->cblk.info[i]._type == HCL_CBLK_TYPE_TRY)
{
//must emit an instruction to exit from the try loop.
/* TODO: do something for finally
if (emit_byte_instruction(hcl, HCL_CODE_EXIT_TRY, HCL_CNODE_GET_LOC(src)) <= -1) return -1;*/
}
}
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BREAK, HCL_CNODE_GET_LOC(src), HCL_NULL, "%.*js outside loop", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
inside_loop:
for (i = hcl->c->cfs.top; i >= 0; --i) for (i = hcl->c->cfs.top; i >= 0; --i)
{ {
const hcl_cframe_t* tcf; const hcl_cframe_t* tcf;
@ -1145,7 +1179,9 @@ static int compile_break (hcl_t* hcl, hcl_cnode_t* src)
} }
} }
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BREAK, HCL_CNODE_GET_LOC(src), HCL_NULL, "%.*js outside loop", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd)); /* this part must no be reached. if a loop control block is found,
* there must exist a COP_POST_UNTIL_BODY or COP_POST_WHILE_BODY frame */
hcl_setsynerrbfmt (hcl, HCL_SYNERR_INTERN, HCL_CNODE_GET_LOC(src), HCL_NULL, "internal error in compiling %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1; return -1;
} }
@ -1199,6 +1235,24 @@ static int compile_continue (hcl_t* hcl, hcl_cnode_t* src)
return -1; return -1;
} }
for (i = hcl->c->cblk.depth; i > hcl->c->fnblk.info[hcl->c->fnblk.depth].cblk_base; --i)
{
if (hcl->c->cblk.info[i]._type == HCL_CBLK_TYPE_LOOP)
{
goto inside_loop;
}
else if (hcl->c->cblk.info[i]._type == HCL_CBLK_TYPE_TRY)
{
//must emit an instruction to exit from the try loop.
/* TODO: do something for finally
if (emit_byte_instruction(hcl, HCL_CODE_EXIT_TRY, HCL_CNODE_GET_LOC(src)) <= -1) return -1;*/
}
}
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BREAK, HCL_CNODE_GET_LOC(src), HCL_NULL, "%.*js outside loop", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
inside_loop:
for (i = hcl->c->cfs.top; i >= 0; --i) for (i = hcl->c->cfs.top; i >= 0; --i)
{ {
const hcl_cframe_t* tcf; const hcl_cframe_t* tcf;
@ -1220,7 +1274,9 @@ static int compile_continue (hcl_t* hcl, hcl_cnode_t* src)
} }
} }
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BREAK, HCL_CNODE_GET_LOC(src), HCL_NULL, "%.*js outside loop", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd)); /* this part must no be reached. if a loop control block is found,
* there must exist a COP_POST_UNTIL_BODY or COP_POST_WHILE_BODY frame */
hcl_setsynerrbfmt (hcl, HCL_SYNERR_INTERN, HCL_CNODE_GET_LOC(src), HCL_NULL, "internal error in compiling %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1; return -1;
} }
@ -1632,16 +1688,7 @@ static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun)
return -1; return -1;
} }
if (push_fnblk(hcl) <= -1) return -1; if (push_fnblk(hcl, HCL_CNODE_GET_LOC(src), hcl->c->tv.wcount, hcl->c->tv.s.len, hcl->code.lit.len) <= -1) return -1;
if (hcl->c->fnblk.depth == HCL_TYPE_MAX(hcl_ooi_t))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, HCL_CNODE_GET_LOC(src), HCL_NULL, "block depth too deep in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
hcl->c->fnblk.depth++;
if (store_temporary_variable_count_for_fnblk(hcl, hcl->c->tv.wcount, hcl->c->tv.s.len, hcl->code.lit.len) <= -1) return -1;
if (hcl->option.trait & HCL_TRAIT_INTERACTIVE) if (hcl->option.trait & HCL_TRAIT_INTERACTIVE)
{ {
@ -1850,6 +1897,8 @@ static int compile_try (hcl_t* hcl, hcl_cnode_t* src)
} }
hcl->c->fnblk.depth++; hcl->c->fnblk.depth++;
if (store_temporary_variable_count_for_block(hcl, hcl->c->tv.wcount, hcl->c->tv.s.len, hcl->code.lit.len) <= -1) return -1; if (store_temporary_variable_count_for_block(hcl, hcl->c->tv.wcount, hcl->c->tv.s.len, hcl->code.lit.len) <= -1) return -1;
#else
/*push_cblk ....*/
#endif #endif
/* TODO: HCL_TRAIT_INTERACTIVE??? */ /* TODO: HCL_TRAIT_INTERACTIVE??? */
@ -2008,7 +2057,9 @@ static HCL_INLINE int post_catch (hcl_t* hcl)
} }
patch_long_jump (hcl, jip, block_code_size); patch_long_jump (hcl, jip, block_code_size);
#if 0
if (emit_byte_instruction(hcl, HCL_CODE_TRY_CATCH, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1; if (emit_byte_instruction(hcl, HCL_CODE_TRY_CATCH, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
#endif
#if 0 #if 0
/*hcl->c->fnblk.depth--; */ /*hcl->c->fnblk.depth--; */
@ -2091,6 +2142,8 @@ static int compile_while (hcl_t* hcl, hcl_cnode_t* src, int next_cop)
return -1; return -1;
} }
if (push_cblk(hcl, HCL_CNODE_GET_LOC(src), HCL_CBLK_TYPE_LOOP) <= -1) return -1;
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX); HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
cond_pos = hcl->code.bc.len; /* position where the bytecode for the conditional is emitted */ cond_pos = hcl->code.bc.len; /* position where the bytecode for the conditional is emitted */
@ -3244,6 +3297,10 @@ static HCL_INLINE int post_while_body (hcl_t* hcl)
patch_long_jump (hcl, jip, jump_offset); patch_long_jump (hcl, jip, jump_offset);
POP_CFRAME (hcl); POP_CFRAME (hcl);
HCL_ASSERT (hcl, hcl->c->cblk.info[hcl->c->cblk.depth]._type == HCL_CBLK_TYPE_LOOP);
pop_cblk (hcl);
return 0; return 0;
} }
@ -3585,6 +3642,7 @@ int hcl_compile (hcl_t* hcl, hcl_cnode_t* obj)
HCL_ASSERT (hcl, hcl->c->tv.s.len == 0); HCL_ASSERT (hcl, hcl->c->tv.s.len == 0);
HCL_ASSERT (hcl, hcl->c->tv.wcount == 0); HCL_ASSERT (hcl, hcl->c->tv.wcount == 0);
HCL_ASSERT (hcl, hcl->c->fnblk.depth == -1); HCL_ASSERT (hcl, hcl->c->fnblk.depth == -1);
HCL_ASSERT (hcl, hcl->c->cblk.depth == -1);
/* TODO: in case i implement all global variables as block arguments at the top level...what should i do? */ /* TODO: in case i implement all global variables as block arguments at the top level...what should i do? */
@ -3620,12 +3678,7 @@ int hcl_compile (hcl_t* hcl, hcl_cnode_t* obj)
* @0 (a) * @0 (a)
* @1 (set-a) * @1 (set-a)
*/ */
#if 0
hcl->c->fnblk.depth++; /* this must be 0 here */
if (store_temporary_variable_count_for_fnblk(hcl, hcl->c->tv.wcount, hcl->c->tv.s.len, 0) <= -1) return -1;
#else
if (push_fnblk(hcl, HCL_NULL, hcl->c->tv.wcount, hcl->c->tv.s.len, 0) <= -1) return -1; if (push_fnblk(hcl, HCL_NULL, hcl->c->tv.wcount, hcl->c->tv.s.len, 0) <= -1) return -1;
#endif
PUSH_CFRAME (hcl, COP_COMPILE_OBJECT, obj); PUSH_CFRAME (hcl, COP_COMPILE_OBJECT, obj);
@ -3806,8 +3859,9 @@ int hcl_compile (hcl_t* hcl, hcl_cnode_t* obj)
HCL_ASSERT (hcl, GET_TOP_CFRAME_INDEX(hcl) < 0); HCL_ASSERT (hcl, GET_TOP_CFRAME_INDEX(hcl) < 0);
HCL_ASSERT (hcl, hcl->c->tv.s.len == 0); HCL_ASSERT (hcl, hcl->c->tv.s.len == 0);
HCL_ASSERT (hcl, hcl->c->tv.wcount == 0); HCL_ASSERT (hcl, hcl->c->tv.wcount == 0);
HCL_ASSERT (hcl, hcl->c->cblk.depth == -1); /* no control blocks expected at this point */
HCL_ASSERT (hcl, hcl->c->fnblk.depth == 0); HCL_ASSERT (hcl, hcl->c->fnblk.depth == 0);
pop_fnblk (hcl); /*hcl->c->fnblk.depth--;*/ pop_fnblk (hcl);
hcl ->log.default_type_mask = log_default_type_mask; hcl ->log.default_type_mask = log_default_type_mask;
return 0; return 0;
@ -3821,8 +3875,11 @@ oops:
hcl->code.bc.len = saved_bc_len; hcl->code.bc.len = saved_bc_len;
hcl->code.lit.len = saved_lit_len; hcl->code.lit.len = saved_lit_len;
/* quick way to call pop_cblk() and pop_fnblk() as many times as necessary */
hcl->c->tv.s.len = 0; hcl->c->tv.s.len = 0;
hcl->c->tv.wcount = 0; hcl->c->tv.wcount = 0;
hcl->c->fnblk.depth = -1; hcl->c->fnblk.depth = -1;
hcl->c->cblk.depth = -1;
return -1; return -1;
} }

8
lib/decode.c
View File

@ -350,8 +350,12 @@ int hcl_decode (hcl_t* hcl, hcl_oow_t start, hcl_oow_t end)
break; break;
/* -------------------------------------------------------- */ /* -------------------------------------------------------- */
case HCL_CODE_TRY_CATCH: case HCL_CODE_TRY_ENTER:
LOG_INST_0 (hcl, "try_catch"); LOG_INST_0 (hcl, "try_enter");
break;
case HCL_CODE_TRY_EXIT:
LOG_INST_0 (hcl, "try_exit");
break; break;
case HCL_CODE_THROW: case HCL_CODE_THROW:

10
lib/exec.c
View File

@ -3119,13 +3119,19 @@ static int execute (hcl_t* hcl)
} }
/* -------------------------------------------------------- */ /* -------------------------------------------------------- */
case HCL_CODE_TRY_CATCH: case HCL_CODE_TRY_ENTER:
LOG_INST_0 (hcl, "try_catch"); LOG_INST_0 (hcl, "try_enter");
#if 0
if (call_try_catch(hcl) <= -1) if (call_try_catch(hcl) <= -1)
{ {
supplement_errmsg (hcl, fetched_instruction_pointer); supplement_errmsg (hcl, fetched_instruction_pointer);
goto oops; goto oops;
} }
#endif
break;
case HCL_CODE_TRY_EXIT:
LOG_INST_0 (hcl, "try_exit");
break; break;
case HCL_CODE_THROW: case HCL_CODE_THROW:

8
lib/hcl-prv.h
View File

@ -384,7 +384,7 @@ struct hcl_fnblk_info_t
hcl_oow_t tmprcnt; hcl_oow_t tmprcnt;
hcl_oow_t lfbase; hcl_oow_t lfbase;
hcl_oow_t cblk_base; hcl_ooi_t cblk_base;
}; };
typedef struct hcl_fnblk_info_t hcl_fnblk_info_t; typedef struct hcl_fnblk_info_t hcl_fnblk_info_t;
@ -776,9 +776,9 @@ enum hcl_bcode_t
HCL_CODE_JUMP2_BACKWARD_IF_FALSE = 0xD3, /* 211 */ HCL_CODE_JUMP2_BACKWARD_IF_FALSE = 0xD3, /* 211 */
HCL_CODE_CALL_X = 0xD4, /* 212 */ HCL_CODE_CALL_X = 0xD4, /* 212 */
HCL_CODE_TRY_CATCH = 0xD5, /* 213 */ HCL_CODE_TRY_ENTER = 0xD5, /* 213 ## */
HCL_CODE_THROW = 0xD6, /* 214 */ HCL_CODE_TRY_EXIT = 0xD6, /* 214 */
/* UNUSED - 0xD7 */ HCL_CODE_THROW = 0xD7, /* 215 */
HCL_CODE_STORE_INTO_CTXTEMPVAR_X = 0xD8, /* 216 ## */ HCL_CODE_STORE_INTO_CTXTEMPVAR_X = 0xD8, /* 216 ## */
/* UNUSED - 0xD9 - 0xDB */ /* UNUSED - 0xD9 - 0xDB */

20
lib/read.c
View File

@ -2130,12 +2130,19 @@ static void fini_compiler (hcl_t* hcl)
HCL_ASSERT (hcl, hcl->c->tv.capa == 0); HCL_ASSERT (hcl, hcl->c->tv.capa == 0);
HCL_ASSERT (hcl, hcl->c->tv.wcount == 0); HCL_ASSERT (hcl, hcl->c->tv.wcount == 0);
if (hcl->c->blk.info) if (hcl->c->cblk.info)
{ {
hcl_freemem (hcl, hcl->c->blk.info); hcl_freemem (hcl, hcl->c->cblk.info);
hcl->c->blk.info = HCL_NULL; hcl->c->cblk.info = HCL_NULL;
hcl->c->blk.info_capa = 0; hcl->c->cblk.info_capa = 0;
hcl->c->blk.depth = -1; hcl->c->cblk.depth = -1;
}
if (hcl->c->fnblk.info)
{
hcl_freemem (hcl, hcl->c->fnblk.info);
hcl->c->fnblk.info = HCL_NULL;
hcl->c->fnblk.info_capa = 0;
hcl->c->fnblk.depth = -1;
} }
clear_io_names (hcl); clear_io_names (hcl);
@ -2183,7 +2190,8 @@ int hcl_attachio (hcl_t* hcl, hcl_ioimpl_t reader, hcl_ioimpl_t printer)
hcl->c->r.e = hcl->_nil; hcl->c->r.e = hcl->_nil;
hcl->c->cfs.top = -1; hcl->c->cfs.top = -1;
hcl->c->blk.depth = -1; hcl->c->cblk.depth = -1;
hcl->c->fnblk.depth = -1;
} }
else if (hcl->c->reader || hcl->c->printer) else if (hcl->c->reader || hcl->c->printer)
{ {