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connect a few more wires to promptenstein

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* libguile/tags.h (scm_tc7_prompt): Allocate a tc7 for prompt objects.

* libguile/control.h (SCM_F_PROMPT_INLINE, SCM_F_PROMPT_ESCAPE)
  (SCM_PROMPT_P, SCM_PROMPT_FLAGS, SCM_PROMPT_INLINE_P)
  (SCM_PROMPT_ESCAPE_P, SCM_PROMPT_TAG, SCM_PROMPT_REGISTERS)
  (SCM_PROMPT_DYNENV, SCM_PROMPT_HANDLER)
  (SCM_PROMPT_PRE_UNWIND_HANDLER, SCM_PROMPT_SETJMP)
  (struct scm_prompt_registers):
* libguile/control.c (scm_c_make_prompt): Flesh out a simple prompts
  implementation.

* libguile/vm-i-system.c (prompt): Wire up the implementation.
* libguile/vm.c: Add a needed #include.
This commit is contained in:
Andy Wingo 2010-02-02 22:59:55 +01:00
parent 69f90b0b05
commit adaf86ec49
5 changed files with 67 additions and 13 deletions
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31
libguile/control.c
View file

@ -22,6 +22,7 @@
#include "libguile/_scm.h"
#include "libguile/control.h"
#include "libguile/vm.h"
@ -47,6 +48,36 @@ SCM_DEFINE (scm_atprompt, "@prompt", 4, 0, 0,
}
#undef FUNC_NAME
SCM
scm_c_make_prompt (SCM vm, SCM k, SCM handler, SCM pre_unwind,
scm_t_uint8 inline_p, scm_t_uint8 escape_only_p)
{
scm_t_bits tag;
SCM ret;
struct scm_prompt_registers *regs;
tag = scm_tc7_prompt;
if (inline_p)
tag |= SCM_F_PROMPT_INLINE;
if (escape_only_p)
tag |= SCM_F_PROMPT_ESCAPE;
ret = scm_words (tag, 6);
regs = scm_gc_malloc_pointerless (sizeof (*regs), "prompt registers");
regs->fp = SCM_VM_DATA (vm)->fp;
regs->sp = SCM_VM_DATA (vm)->sp;
regs->ip = SCM_VM_DATA (vm)->ip;
SCM_SET_CELL_OBJECT (ret, 1, k);
SCM_SET_CELL_WORD (ret, 2, (scm_t_bits)regs);
SCM_SET_CELL_OBJECT (ret, 3, scm_i_dynwinds ());
SCM_SET_CELL_OBJECT (ret, 4, handler);
SCM_SET_CELL_OBJECT (ret, 5, pre_unwind);
return ret;
}
static void