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ngspice
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lexical #3/3, collapse append(NULL) into cp_ccom() 

the sequence
   orig_wlist = wlist;
   append(NULL);
   cp_ccom(wlist, ...);
 is transformed.

 expressions to care about in cp_ccom()
    C1 :=  (wlist->wl_next != NULL)
    C2 :=  (wlist->wl_word != NULL)
    C3 :=  wl_length(wlist)

    D1 :=  (orig_wlist != NULL)
    D2 :=  (orig_wlist->wl_word != NULL)
    D3 :=  wl_length(orig_wlist);

 cases and their significance in cp_ccom():
    orig_wlist = NULL;
    wlist = wl_cons(NULL, NULL);
      C1 == false
      D1 == false
      C2,C3 dont care

    orig_wlist = wl_cons(E1, wl_cons(E2, ... wl_cons(En, NULL)))
    wlist = wl_cons(E1, wl_cons(E2, .... wl_cons(En, wl_cons(NULL, NULL))))
     C1 == true
     D1 == true
     C2 === D2
     C3 === D3 + 1
This commit is contained in:
rlar 2012-08-02 18:53:43 +02:00
parent fec5b00a0d
commit 64d00a6b43
2 changed files with 2 additions and 4 deletions
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4
src/frontend/parser/complete.c
View File

@ -94,11 +94,11 @@ cp_ccom(wordlist *wlist, char *buf, bool esc)
buf = cp_unquote(copy(buf)); buf = cp_unquote(copy(buf));
cp_wstrip(buf); cp_wstrip(buf);
if (wlist->wl_next) { /* Not the first word. */ if (wlist) { /* Not the first word. */
cc = getccom(wlist->wl_word); cc = getccom(wlist->wl_word);
if (cc && cc->cc_invalid) if (cc && cc->cc_invalid)
cc = NULL; cc = NULL;
arg = wl_length(wlist) - 2; arg = wl_length(wlist) - 1;
if (arg > 3) if (arg > 3)
arg = 3; arg = 3;
/* First filenames. */ /* First filenames. */

2
src/frontend/parser/lexical.c
View File

@ -256,7 +256,6 @@ gotchar:
goto done; goto done;
} }
// cp_ccom doesn't mess wlist, read only access to wlist->wl_word // cp_ccom doesn't mess wlist, read only access to wlist->wl_word
append(NULL);
cp_ccom(wlist, buf, FALSE); cp_ccom(wlist, buf, FALSE);
wl_free(wlist); wl_free(wlist);
(void) fputc('\r', cp_out); (void) fputc('\r', cp_out);
@ -291,7 +290,6 @@ gotchar:
#else #else
fputc(linebuf[j], cp_out); /* But you can't edit */ fputc(linebuf[j], cp_out); /* But you can't edit */
#endif #endif
append(NULL);
// cp_ccom doesn't mess wlist, read only access to wlist->wl_word // cp_ccom doesn't mess wlist, read only access to wlist->wl_word
cp_ccom(wlist, buf, TRUE); cp_ccom(wlist, buf, TRUE);
wl_free(wlist); wl_free(wlist);