diff options
Diffstat (limited to 'libguile/srcprop.c')
-rw-r--r-- | libguile/srcprop.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/libguile/srcprop.c b/libguile/srcprop.c index a43f4ce67..c182702ac 100644 --- a/libguile/srcprop.c +++ b/libguile/srcprop.c @@ -208,11 +208,74 @@ SCM_DEFINE (scm_set_source_properties_x, "set-source-properties!", 2, 0, 0, #define FUNC_NAME s_scm_set_source_properties_x { SCM handle; + long line = 0, col = 0; + SCM fname = SCM_UNDEFINED, copy = SCM_UNDEFINED, breakpoint = SCM_BOOL_F; + SCM others = SCM_EOL; + SCM *others_cdrloc = &others; + int need_srcprops = 0; + SCM tail, key; + SCM_VALIDATE_NIM (1, obj); if (SCM_MEMOIZEDP (obj)) obj = SCM_MEMOIZED_EXP (obj); else if (!scm_is_pair (obj)) SCM_WRONG_TYPE_ARG(1, obj); + + tail = alist; + while (!scm_is_null (tail)) + { + key = SCM_CAAR (tail); + if (scm_is_eq (key, scm_sym_line)) + { + line = scm_to_long (SCM_CDAR (tail)); + need_srcprops = 1; + } + else if (scm_is_eq (key, scm_sym_column)) + { + col = scm_to_long (SCM_CDAR (tail)); + need_srcprops = 1; + } + else if (scm_is_eq (key, scm_sym_filename)) + { + fname = SCM_CDAR (tail); + need_srcprops = 1; + } + else if (scm_is_eq (key, scm_sym_copy)) + { + copy = SCM_CDAR (tail); + need_srcprops = 1; + } + else if (scm_is_eq (key, scm_sym_breakpoint)) + { + breakpoint = SCM_CDAR (tail); + need_srcprops = 1; + } + else + { + /* Do we allocate here, or clobber the caller's alist? + + Source properties aren't supposed to be used for anything + except the special properties above, so the mainline case + is that we never execute this else branch, and hence it + doesn't matter much. + + We choose allocation here, as that seems safer. + */ + *others_cdrloc = scm_cons (scm_cons (key, SCM_CDAR (tail)), + SCM_EOL); + others_cdrloc = SCM_CDRLOC (*others_cdrloc); + } + tail = SCM_CDR (tail); + } + if (need_srcprops) + { + alist = scm_make_srcprops (line, col, fname, copy, others); + if (scm_is_true (breakpoint)) + SETSRCPROPBRK (alist); + } + else + alist = others; + handle = scm_hashq_create_handle_x (scm_source_whash, obj, alist); SCM_SETCDR (handle, alist); return alist; |