1/*
2** C type management.
3** Copyright (C) 2005-2021 Mike Pall. See Copyright Notice in luajit.h
4*/
5
6#include "lj_obj.h"
7
8#if LJ_HASFFI
9
10#include "lj_gc.h"
11#include "lj_err.h"
12#include "lj_str.h"
13#include "lj_tab.h"
14#include "lj_strfmt.h"
15#include "lj_ctype.h"
16#include "lj_ccallback.h"
17#include "lj_buf.h"
18
19/* -- C type definitions -------------------------------------------------- */
20
21/* Predefined typedefs. */
22#define CTTDDEF(_) \
23 /* Vararg handling. */ \
24 _("va_list", P_VOID) \
25 _("__builtin_va_list", P_VOID) \
26 _("__gnuc_va_list", P_VOID) \
27 /* From stddef.h. */ \
28 _("ptrdiff_t", INT_PSZ) \
29 _("size_t", UINT_PSZ) \
30 _("wchar_t", WCHAR) \
31 /* Subset of stdint.h. */ \
32 _("int8_t", INT8) \
33 _("int16_t", INT16) \
34 _("int32_t", INT32) \
35 _("int64_t", INT64) \
36 _("uint8_t", UINT8) \
37 _("uint16_t", UINT16) \
38 _("uint32_t", UINT32) \
39 _("uint64_t", UINT64) \
40 _("intptr_t", INT_PSZ) \
41 _("uintptr_t", UINT_PSZ) \
42 /* From POSIX. */ \
43 _("ssize_t", INT_PSZ) \
44 /* End of typedef list. */
45
46/* Keywords (only the ones we actually care for). */
47#define CTKWDEF(_) \
48 /* Type specifiers. */ \
49 _("void", -1, CTOK_VOID) \
50 _("_Bool", 0, CTOK_BOOL) \
51 _("bool", 1, CTOK_BOOL) \
52 _("char", 1, CTOK_CHAR) \
53 _("int", 4, CTOK_INT) \
54 _("__int8", 1, CTOK_INT) \
55 _("__int16", 2, CTOK_INT) \
56 _("__int32", 4, CTOK_INT) \
57 _("__int64", 8, CTOK_INT) \
58 _("float", 4, CTOK_FP) \
59 _("double", 8, CTOK_FP) \
60 _("long", 0, CTOK_LONG) \
61 _("short", 0, CTOK_SHORT) \
62 _("_Complex", 0, CTOK_COMPLEX) \
63 _("complex", 0, CTOK_COMPLEX) \
64 _("__complex", 0, CTOK_COMPLEX) \
65 _("__complex__", 0, CTOK_COMPLEX) \
66 _("signed", 0, CTOK_SIGNED) \
67 _("__signed", 0, CTOK_SIGNED) \
68 _("__signed__", 0, CTOK_SIGNED) \
69 _("unsigned", 0, CTOK_UNSIGNED) \
70 /* Type qualifiers. */ \
71 _("const", 0, CTOK_CONST) \
72 _("__const", 0, CTOK_CONST) \
73 _("__const__", 0, CTOK_CONST) \
74 _("volatile", 0, CTOK_VOLATILE) \
75 _("__volatile", 0, CTOK_VOLATILE) \
76 _("__volatile__", 0, CTOK_VOLATILE) \
77 _("restrict", 0, CTOK_RESTRICT) \
78 _("__restrict", 0, CTOK_RESTRICT) \
79 _("__restrict__", 0, CTOK_RESTRICT) \
80 _("inline", 0, CTOK_INLINE) \
81 _("__inline", 0, CTOK_INLINE) \
82 _("__inline__", 0, CTOK_INLINE) \
83 /* Storage class specifiers. */ \
84 _("typedef", 0, CTOK_TYPEDEF) \
85 _("extern", 0, CTOK_EXTERN) \
86 _("static", 0, CTOK_STATIC) \
87 _("auto", 0, CTOK_AUTO) \
88 _("register", 0, CTOK_REGISTER) \
89 /* GCC Attributes. */ \
90 _("__extension__", 0, CTOK_EXTENSION) \
91 _("__attribute", 0, CTOK_ATTRIBUTE) \
92 _("__attribute__", 0, CTOK_ATTRIBUTE) \
93 _("asm", 0, CTOK_ASM) \
94 _("__asm", 0, CTOK_ASM) \
95 _("__asm__", 0, CTOK_ASM) \
96 /* MSVC Attributes. */ \
97 _("__declspec", 0, CTOK_DECLSPEC) \
98 _("__cdecl", CTCC_CDECL, CTOK_CCDECL) \
99 _("__thiscall", CTCC_THISCALL, CTOK_CCDECL) \
100 _("__fastcall", CTCC_FASTCALL, CTOK_CCDECL) \
101 _("__stdcall", CTCC_STDCALL, CTOK_CCDECL) \
102 _("__ptr32", 4, CTOK_PTRSZ) \
103 _("__ptr64", 8, CTOK_PTRSZ) \
104 /* Other type specifiers. */ \
105 _("struct", 0, CTOK_STRUCT) \
106 _("union", 0, CTOK_UNION) \
107 _("enum", 0, CTOK_ENUM) \
108 /* Operators. */ \
109 _("sizeof", 0, CTOK_SIZEOF) \
110 _("__alignof", 0, CTOK_ALIGNOF) \
111 _("__alignof__", 0, CTOK_ALIGNOF) \
112 /* End of keyword list. */
113
114/* Type info for predefined types. Size merged in. */
115static CTInfo lj_ctype_typeinfo[] = {
116#define CTTYINFODEF(id, sz, ct, info) CTINFO((ct),(((sz)&0x3fu)<<10)+(info)),
117#define CTTDINFODEF(name, id) CTINFO(CT_TYPEDEF, CTID_##id),
118#define CTKWINFODEF(name, sz, kw) CTINFO(CT_KW,(((sz)&0x3fu)<<10)+(kw)),
119CTTYDEF(CTTYINFODEF)
120CTTDDEF(CTTDINFODEF)
121CTKWDEF(CTKWINFODEF)
122#undef CTTYINFODEF
123#undef CTTDINFODEF
124#undef CTKWINFODEF
125 0
126};
127
128/* Predefined type names collected in a single string. */
129static const char * const lj_ctype_typenames =
130#define CTTDNAMEDEF(name, id) name "\0"
131#define CTKWNAMEDEF(name, sz, cds) name "\0"
132CTTDDEF(CTTDNAMEDEF)
133CTKWDEF(CTKWNAMEDEF)
134#undef CTTDNAMEDEF
135#undef CTKWNAMEDEF
136;
137
138#define CTTYPEINFO_NUM (sizeof(lj_ctype_typeinfo)/sizeof(CTInfo)-1)
139#ifdef LUAJIT_CTYPE_CHECK_ANCHOR
140#define CTTYPETAB_MIN CTTYPEINFO_NUM
141#else
142#define CTTYPETAB_MIN 128
143#endif
144
145/* -- C type interning ---------------------------------------------------- */
146
147#define ct_hashtype(info, size) (hashrot(info, size) & CTHASH_MASK)
148#define ct_hashname(name) \
149 (hashrot(u32ptr(name), u32ptr(name) + HASH_BIAS) & CTHASH_MASK)
150
151/* Create new type element. */
152CTypeID lj_ctype_new(CTState *cts, CType **ctp)
153{
154 CTypeID id = cts->top;
155 CType *ct;
156 lj_assertCTS(cts->L, "uninitialized cts->L");
157 if (LJ_UNLIKELY(id >= cts->sizetab)) {
158 if (id >= CTID_MAX) lj_err_msg(cts->L, LJ_ERR_TABOV);
159#ifdef LUAJIT_CTYPE_CHECK_ANCHOR
160 ct = lj_mem_newvec(cts->L, id+1, CType);
161 memcpy(ct, cts->tab, id*sizeof(CType));
162 memset(cts->tab, 0, id*sizeof(CType));
163 lj_mem_freevec(cts->g, cts->tab, cts->sizetab, CType);
164 cts->tab = ct;
165 cts->sizetab = id+1;
166#else
167 lj_mem_growvec(cts->L, cts->tab, cts->sizetab, CTID_MAX, CType);
168#endif
169 }
170 cts->top = id+1;
171 *ctp = ct = &cts->tab[id];
172 ct->info = 0;
173 ct->size = 0;
174 ct->sib = 0;
175 ct->next = 0;
176 setgcrefnull(ct->name);
177 return id;
178}
179
180/* Intern a type element. */
181CTypeID lj_ctype_intern(CTState *cts, CTInfo info, CTSize size)
182{
183 uint32_t h = ct_hashtype(info, size);
184 CTypeID id = cts->hash[h];
185 lj_assertCTS(cts->L, "uninitialized cts->L");
186 while (id) {
187 CType *ct = ctype_get(cts, id);
188 if (ct->info == info && ct->size == size)
189 return id;
190 id = ct->next;
191 }
192 id = cts->top;
193 if (LJ_UNLIKELY(id >= cts->sizetab)) {
194 if (id >= CTID_MAX) lj_err_msg(cts->L, LJ_ERR_TABOV);
195 lj_mem_growvec(cts->L, cts->tab, cts->sizetab, CTID_MAX, CType);
196 }
197 cts->top = id+1;
198 cts->tab[id].info = info;
199 cts->tab[id].size = size;
200 cts->tab[id].sib = 0;
201 cts->tab[id].next = cts->hash[h];
202 setgcrefnull(cts->tab[id].name);
203 cts->hash[h] = (CTypeID1)id;
204 return id;
205}
206
207/* Add type element to hash table. */
208static void ctype_addtype(CTState *cts, CType *ct, CTypeID id)
209{
210 uint32_t h = ct_hashtype(ct->info, ct->size);
211 ct->next = cts->hash[h];
212 cts->hash[h] = (CTypeID1)id;
213}
214
215/* Add named element to hash table. */
216void lj_ctype_addname(CTState *cts, CType *ct, CTypeID id)
217{
218 uint32_t h = ct_hashname(gcref(ct->name));
219 ct->next = cts->hash[h];
220 cts->hash[h] = (CTypeID1)id;
221}
222
223/* Get a C type by name, matching the type mask. */
224CTypeID lj_ctype_getname(CTState *cts, CType **ctp, GCstr *name, uint32_t tmask)
225{
226 CTypeID id = cts->hash[ct_hashname(name)];
227 while (id) {
228 CType *ct = ctype_get(cts, id);
229 if (gcref(ct->name) == obj2gco(name) &&
230 ((tmask >> ctype_type(ct->info)) & 1)) {
231 *ctp = ct;
232 return id;
233 }
234 id = ct->next;
235 }
236 *ctp = &cts->tab[0]; /* Simplify caller logic. ctype_get() would assert. */
237 return 0;
238}
239
240/* Get a struct/union/enum/function field by name. */
241CType *lj_ctype_getfieldq(CTState *cts, CType *ct, GCstr *name, CTSize *ofs,
242 CTInfo *qual)
243{
244 while (ct->sib) {
245 ct = ctype_get(cts, ct->sib);
246 if (gcref(ct->name) == obj2gco(name)) {
247 *ofs = ct->size;
248 return ct;
249 }
250 if (ctype_isxattrib(ct->info, CTA_SUBTYPE)) {
251 CType *fct, *cct = ctype_child(cts, ct);
252 CTInfo q = 0;
253 while (ctype_isattrib(cct->info)) {
254 if (ctype_attrib(cct->info) == CTA_QUAL) q |= cct->size;
255 cct = ctype_child(cts, cct);
256 }
257 fct = lj_ctype_getfieldq(cts, cct, name, ofs, qual);
258 if (fct) {
259 if (qual) *qual |= q;
260 *ofs += ct->size;
261 return fct;
262 }
263 }
264 }
265 return NULL; /* Not found. */
266}
267
268/* -- C type information -------------------------------------------------- */
269
270/* Follow references and get raw type for a C type ID. */
271CType *lj_ctype_rawref(CTState *cts, CTypeID id)
272{
273 CType *ct = ctype_get(cts, id);
274 while (ctype_isattrib(ct->info) || ctype_isref(ct->info))
275 ct = ctype_child(cts, ct);
276 return ct;
277}
278
279/* Get size for a C type ID. Does NOT support VLA/VLS. */
280CTSize lj_ctype_size(CTState *cts, CTypeID id)
281{
282 CType *ct = ctype_raw(cts, id);
283 return ctype_hassize(ct->info) ? ct->size : CTSIZE_INVALID;
284}
285
286/* Get size for a variable-length C type. Does NOT support other C types. */
287CTSize lj_ctype_vlsize(CTState *cts, CType *ct, CTSize nelem)
288{
289 uint64_t xsz = 0;
290 if (ctype_isstruct(ct->info)) {
291 CTypeID arrid = 0, fid = ct->sib;
292 xsz = ct->size; /* Add the struct size. */
293 while (fid) {
294 CType *ctf = ctype_get(cts, fid);
295 if (ctype_type(ctf->info) == CT_FIELD)
296 arrid = ctype_cid(ctf->info); /* Remember last field of VLS. */
297 fid = ctf->sib;
298 }
299 ct = ctype_raw(cts, arrid);
300 }
301 lj_assertCTS(ctype_isvlarray(ct->info), "VLA expected");
302 ct = ctype_rawchild(cts, ct); /* Get array element. */
303 lj_assertCTS(ctype_hassize(ct->info), "bad VLA without size");
304 /* Calculate actual size of VLA and check for overflow. */
305 xsz += (uint64_t)ct->size * nelem;
306 return xsz < 0x80000000u ? (CTSize)xsz : CTSIZE_INVALID;
307}
308
309/* Get type, qualifiers, size and alignment for a C type ID. */
310CTInfo lj_ctype_info(CTState *cts, CTypeID id, CTSize *szp)
311{
312 CTInfo qual = 0;
313 CType *ct = ctype_get(cts, id);
314 for (;;) {
315 CTInfo info = ct->info;
316 if (ctype_isenum(info)) {
317 /* Follow child. Need to look at its attributes, too. */
318 } else if (ctype_isattrib(info)) {
319 if (ctype_isxattrib(info, CTA_QUAL))
320 qual |= ct->size;
321 else if (ctype_isxattrib(info, CTA_ALIGN) && !(qual & CTFP_ALIGNED))
322 qual |= CTFP_ALIGNED + CTALIGN(ct->size);
323 } else {
324 if (!(qual & CTFP_ALIGNED)) qual |= (info & CTF_ALIGN);
325 qual |= (info & ~(CTF_ALIGN|CTMASK_CID));
326 lj_assertCTS(ctype_hassize(info) || ctype_isfunc(info),
327 "ctype without size");
328 *szp = ctype_isfunc(info) ? CTSIZE_INVALID : ct->size;
329 break;
330 }
331 ct = ctype_get(cts, ctype_cid(info));
332 }
333 return qual;
334}
335
336/* Get ctype metamethod. */
337cTValue *lj_ctype_meta(CTState *cts, CTypeID id, MMS mm)
338{
339 CType *ct = ctype_get(cts, id);
340 cTValue *tv;
341 while (ctype_isattrib(ct->info) || ctype_isref(ct->info)) {
342 id = ctype_cid(ct->info);
343 ct = ctype_get(cts, id);
344 }
345 if (ctype_isptr(ct->info) &&
346 ctype_isfunc(ctype_get(cts, ctype_cid(ct->info))->info))
347 tv = lj_tab_getstr(cts->miscmap, &cts->g->strempty);
348 else
349 tv = lj_tab_getinth(cts->miscmap, -(int32_t)id);
350 if (tv && tvistab(tv) &&
351 (tv = lj_tab_getstr(tabV(tv), mmname_str(cts->g, mm))) && !tvisnil(tv))
352 return tv;
353 return NULL;
354}
355
356/* -- C type representation ----------------------------------------------- */
357
358/* Fixed max. length of a C type representation. */
359#define CTREPR_MAX 512
360
361typedef struct CTRepr {
362 char *pb, *pe;
363 CTState *cts;
364 lua_State *L;
365 int needsp;
366 int ok;
367 char buf[CTREPR_MAX];
368} CTRepr;
369
370/* Prepend string. */
371static void ctype_prepstr(CTRepr *ctr, const char *str, MSize len)
372{
373 char *p = ctr->pb;
374 if (ctr->buf + len+1 > p) { ctr->ok = 0; return; }
375 if (ctr->needsp) *--p = ' ';
376 ctr->needsp = 1;
377 p -= len;
378 while (len-- > 0) p[len] = str[len];
379 ctr->pb = p;
380}
381
382#define ctype_preplit(ctr, str) ctype_prepstr((ctr), "" str, sizeof(str)-1)
383
384/* Prepend char. */
385static void ctype_prepc(CTRepr *ctr, int c)
386{
387 if (ctr->buf >= ctr->pb) { ctr->ok = 0; return; }
388 *--ctr->pb = c;
389}
390
391/* Prepend number. */
392static void ctype_prepnum(CTRepr *ctr, uint32_t n)
393{
394 char *p = ctr->pb;
395 if (ctr->buf + 10+1 > p) { ctr->ok = 0; return; }
396 do { *--p = (char)('0' + n % 10); } while (n /= 10);
397 ctr->pb = p;
398 ctr->needsp = 0;
399}
400
401/* Append char. */
402static void ctype_appc(CTRepr *ctr, int c)
403{
404 if (ctr->pe >= ctr->buf + CTREPR_MAX) { ctr->ok = 0; return; }
405 *ctr->pe++ = c;
406}
407
408/* Append number. */
409static void ctype_appnum(CTRepr *ctr, uint32_t n)
410{
411 char buf[10];
412 char *p = buf+sizeof(buf);
413 char *q = ctr->pe;
414 if (q > ctr->buf + CTREPR_MAX - 10) { ctr->ok = 0; return; }
415 do { *--p = (char)('0' + n % 10); } while (n /= 10);
416 do { *q++ = *p++; } while (p < buf+sizeof(buf));
417 ctr->pe = q;
418}
419
420/* Prepend qualifiers. */
421static void ctype_prepqual(CTRepr *ctr, CTInfo info)
422{
423 if ((info & CTF_VOLATILE)) ctype_preplit(ctr, "volatile");
424 if ((info & CTF_CONST)) ctype_preplit(ctr, "const");
425}
426
427/* Prepend named type. */
428static void ctype_preptype(CTRepr *ctr, CType *ct, CTInfo qual, const char *t)
429{
430 if (gcref(ct->name)) {
431 GCstr *str = gco2str(gcref(ct->name));
432 ctype_prepstr(ctr, strdata(str), str->len);
433 } else {
434 if (ctr->needsp) ctype_prepc(ctr, ' ');
435 ctype_prepnum(ctr, ctype_typeid(ctr->cts, ct));
436 ctr->needsp = 1;
437 }
438 ctype_prepstr(ctr, t, (MSize)strlen(t));
439 ctype_prepqual(ctr, qual);
440}
441
442static void ctype_repr(CTRepr *ctr, CTypeID id)
443{
444 CType *ct = ctype_get(ctr->cts, id);
445 CTInfo qual = 0;
446 int ptrto = 0;
447 for (;;) {
448 CTInfo info = ct->info;
449 CTSize size = ct->size;
450 switch (ctype_type(info)) {
451 case CT_NUM:
452 if ((info & CTF_BOOL)) {
453 ctype_preplit(ctr, "bool");
454 } else if ((info & CTF_FP)) {
455 if (size == sizeof(double)) ctype_preplit(ctr, "double");
456 else if (size == sizeof(float)) ctype_preplit(ctr, "float");
457 else ctype_preplit(ctr, "long double");
458 } else if (size == 1) {
459 if (!((info ^ CTF_UCHAR) & CTF_UNSIGNED)) ctype_preplit(ctr, "char");
460 else if (CTF_UCHAR) ctype_preplit(ctr, "signed char");
461 else ctype_preplit(ctr, "unsigned char");
462 } else if (size < 8) {
463 if (size == 4) ctype_preplit(ctr, "int");
464 else ctype_preplit(ctr, "short");
465 if ((info & CTF_UNSIGNED)) ctype_preplit(ctr, "unsigned");
466 } else {
467 ctype_preplit(ctr, "_t");
468 ctype_prepnum(ctr, size*8);
469 ctype_preplit(ctr, "int");
470 if ((info & CTF_UNSIGNED)) ctype_prepc(ctr, 'u');
471 }
472 ctype_prepqual(ctr, (qual|info));
473 return;
474 case CT_VOID:
475 ctype_preplit(ctr, "void");
476 ctype_prepqual(ctr, (qual|info));
477 return;
478 case CT_STRUCT:
479 ctype_preptype(ctr, ct, qual, (info & CTF_UNION) ? "union" : "struct");
480 return;
481 case CT_ENUM:
482 if (id == CTID_CTYPEID) {
483 ctype_preplit(ctr, "ctype");
484 return;
485 }
486 ctype_preptype(ctr, ct, qual, "enum");
487 return;
488 case CT_ATTRIB:
489 if (ctype_attrib(info) == CTA_QUAL) qual |= size;
490 break;
491 case CT_PTR:
492 if ((info & CTF_REF)) {
493 ctype_prepc(ctr, '&');
494 } else {
495 ctype_prepqual(ctr, (qual|info));
496 if (LJ_64 && size == 4) ctype_preplit(ctr, "__ptr32");
497 ctype_prepc(ctr, '*');
498 }
499 qual = 0;
500 ptrto = 1;
501 ctr->needsp = 1;
502 break;
503 case CT_ARRAY:
504 if (ctype_isrefarray(info)) {
505 ctr->needsp = 1;
506 if (ptrto) { ptrto = 0; ctype_prepc(ctr, '('); ctype_appc(ctr, ')'); }
507 ctype_appc(ctr, '[');
508 if (size != CTSIZE_INVALID) {
509 CTSize csize = ctype_child(ctr->cts, ct)->size;
510 ctype_appnum(ctr, csize ? size/csize : 0);
511 } else if ((info & CTF_VLA)) {
512 ctype_appc(ctr, '?');
513 }
514 ctype_appc(ctr, ']');
515 } else if ((info & CTF_COMPLEX)) {
516 if (size == 2*sizeof(float)) ctype_preplit(ctr, "float");
517 ctype_preplit(ctr, "complex");
518 return;
519 } else {
520 ctype_preplit(ctr, ")))");
521 ctype_prepnum(ctr, size);
522 ctype_preplit(ctr, "__attribute__((vector_size(");
523 }
524 break;
525 case CT_FUNC:
526 ctr->needsp = 1;
527 if (ptrto) { ptrto = 0; ctype_prepc(ctr, '('); ctype_appc(ctr, ')'); }
528 ctype_appc(ctr, '(');
529 ctype_appc(ctr, ')');
530 break;
531 default:
532 lj_assertG_(ctr->cts->g, 0, "bad ctype %08x", info);
533 break;
534 }
535 ct = ctype_get(ctr->cts, ctype_cid(info));
536 }
537}
538
539/* Return a printable representation of a C type. */
540GCstr *lj_ctype_repr(lua_State *L, CTypeID id, GCstr *name)
541{
542 global_State *g = G(L);
543 CTRepr ctr;
544 ctr.pb = ctr.pe = &ctr.buf[CTREPR_MAX/2];
545 ctr.cts = ctype_ctsG(g);
546 ctr.L = L;
547 ctr.ok = 1;
548 ctr.needsp = 0;
549 if (name) ctype_prepstr(&ctr, strdata(name), name->len);
550 ctype_repr(&ctr, id);
551 if (LJ_UNLIKELY(!ctr.ok)) return lj_str_newlit(L, "?");
552 return lj_str_new(L, ctr.pb, ctr.pe - ctr.pb);
553}
554
555/* Convert int64_t/uint64_t to string with 'LL' or 'ULL' suffix. */
556GCstr *lj_ctype_repr_int64(lua_State *L, uint64_t n, int isunsigned)
557{
558 char buf[1+20+3];
559 char *p = buf+sizeof(buf);
560 int sign = 0;
561 *--p = 'L'; *--p = 'L';
562 if (isunsigned) {
563 *--p = 'U';
564 } else if ((int64_t)n < 0) {
565 n = (uint64_t)-(int64_t)n;
566 sign = 1;
567 }
568 do { *--p = (char)('0' + n % 10); } while (n /= 10);
569 if (sign) *--p = '-';
570 return lj_str_new(L, p, (size_t)(buf+sizeof(buf)-p));
571}
572
573/* Convert complex to string with 'i' or 'I' suffix. */
574GCstr *lj_ctype_repr_complex(lua_State *L, void *sp, CTSize size)
575{
576 SBuf *sb = lj_buf_tmp_(L);
577 TValue re, im;
578 if (size == 2*sizeof(double)) {
579 re.n = *(double *)sp; im.n = ((double *)sp)[1];
580 } else {
581 re.n = (double)*(float *)sp; im.n = (double)((float *)sp)[1];
582 }
583 lj_strfmt_putfnum(sb, STRFMT_G14, re.n);
584 if (!(im.u32.hi & 0x80000000u) || im.n != im.n) lj_buf_putchar(sb, '+');
585 lj_strfmt_putfnum(sb, STRFMT_G14, im.n);
586 lj_buf_putchar(sb, sbufP(sb)[-1] >= 'a' ? 'I' : 'i');
587 return lj_buf_str(L, sb);
588}
589
590/* -- C type state -------------------------------------------------------- */
591
592/* Initialize C type table and state. */
593CTState *lj_ctype_init(lua_State *L)
594{
595 CTState *cts = lj_mem_newt(L, sizeof(CTState), CTState);
596 CType *ct = lj_mem_newvec(L, CTTYPETAB_MIN, CType);
597 const char *name = lj_ctype_typenames;
598 CTypeID id;
599 memset(cts, 0, sizeof(CTState));
600 cts->tab = ct;
601 cts->sizetab = CTTYPETAB_MIN;
602 cts->top = CTTYPEINFO_NUM;
603 cts->L = NULL;
604 cts->g = G(L);
605 for (id = 0; id < CTTYPEINFO_NUM; id++, ct++) {
606 CTInfo info = lj_ctype_typeinfo[id];
607 ct->size = (CTSize)((int32_t)(info << 16) >> 26);
608 ct->info = info & 0xffff03ffu;
609 ct->sib = 0;
610 if (ctype_type(info) == CT_KW || ctype_istypedef(info)) {
611 size_t len = strlen(name);
612 GCstr *str = lj_str_new(L, name, len);
613 ctype_setname(ct, str);
614 name += len+1;
615 lj_ctype_addname(cts, ct, id);
616 } else {
617 setgcrefnull(ct->name);
618 ct->next = 0;
619 if (!ctype_isenum(info)) ctype_addtype(cts, ct, id);
620 }
621 }
622 setmref(G(L)->ctype_state, cts);
623 return cts;
624}
625
626/* Free C type table and state. */
627void lj_ctype_freestate(global_State *g)
628{
629 CTState *cts = ctype_ctsG(g);
630 if (cts) {
631 lj_ccallback_mcode_free(cts);
632 lj_mem_freevec(g, cts->tab, cts->sizetab, CType);
633 lj_mem_freevec(g, cts->cb.cbid, cts->cb.sizeid, CTypeID1);
634 lj_mem_freet(g, cts);
635 }
636}
637
638#endif
639