/* Symbol printer.
NB: Uninterned symbols are treated as sharable objects (can be written
with #n= syntax). It is handled by upper layer (write.c) so we don't
worry about it in this routine.
*/
static void symbol_print(ScmObj obj, ScmPort *port, ScmWriteContext *ctx)
{
if (Scm_WriteContextMode(ctx) == SCM_WRITE_DISPLAY) {
SCM_PUTS(SCM_SYMBOL_NAME(obj), port);
} else {
#if GAUCHE_KEEP_DISJOINT_KEYWORD_OPTION
if (SCM_KEYWORDP(obj) && keyword_disjoint_p) {
Scm_Putc(':', port);
/* We basically print keyword names in the same way as symbols
(i.e. using |-escape if necessary). However, as a convention,
two things are different from the default symbol writer.
(1) We don't check the noninitials; :1 is unambiguously a
keyword, so we don't need to print :|1|.
(2) A keyword with an empty name can be printed just as :,
instead of :||.
These conventions are useful if we pass the S-expression with
these keywords to other Scheme implementations that don't support
CL-style keywords; they would just read those ones as symbols.
*/
Scm_WriteSymbolName(SCM_KEYWORD(obj)->name, port, ctx,
(SCM_SYMBOL_WRITER_NOESCAPE_INITIAL
|SCM_SYMBOL_WRITER_NOESCAPE_EMPTY));
return;
}
#endif /*GAUCHE_KEEP_DISJOINT_KEYWORD_OPTION*/
if (!SCM_SYMBOL_INTERNED(obj)) SCM_PUTZ("#:", -1, port);
Scm_WriteSymbolName(SCM_SYMBOL_NAME(obj), port, ctx, 0);
}
}
/*
* utilities for sigset
*/
static void display_sigset(sigset_t *set, ScmPort *port)
{
struct sigdesc *desc = sigDesc;
int cnt = 0;
for (; desc->name; desc++) {
if (sigismember(set, desc->num)) {
if (cnt++) Scm_Putc('|', port);
Scm_Putz(desc->name+3, -1, port);
}
}
}
static void charset_print_ch(ScmPort *out, ScmChar ch, int firstp)
{
if (ch != 0 && ch < 0x80
&& (strchr("[]-\\", ch) != NULL || (ch == '^' && firstp))) {
Scm_Printf(out, "\\%C", ch);
} else {
switch (Scm_CharGeneralCategory(ch)) {
case SCM_CHAR_CATEGORY_Mn:
case SCM_CHAR_CATEGORY_Mc:
case SCM_CHAR_CATEGORY_Me:
case SCM_CHAR_CATEGORY_Cc:
case SCM_CHAR_CATEGORY_Cf:
case SCM_CHAR_CATEGORY_Cs:
case SCM_CHAR_CATEGORY_Co:
case SCM_CHAR_CATEGORY_Cn:
if (ch < 0x10000) Scm_Printf(out, "\\u%04lx", ch);
else Scm_Printf(out, "\\U%08lx", ch);
break;
default:
Scm_Putc(ch, out);
}
}
}
