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Diffstat (limited to 'libs/luajit-cmake/luajit/src/lj_buf.c')
-rw-r--r--libs/luajit-cmake/luajit/src/lj_buf.c305
1 files changed, 305 insertions, 0 deletions
diff --git a/libs/luajit-cmake/luajit/src/lj_buf.c b/libs/luajit-cmake/luajit/src/lj_buf.c
new file mode 100644
index 0000000..cf268af
--- /dev/null
+++ b/libs/luajit-cmake/luajit/src/lj_buf.c
@@ -0,0 +1,305 @@
+/*
+** Buffer handling.
+** Copyright (C) 2005-2022 Mike Pall. See Copyright Notice in luajit.h
+*/
+
+#define lj_buf_c
+#define LUA_CORE
+
+#include "lj_obj.h"
+#include "lj_gc.h"
+#include "lj_err.h"
+#include "lj_buf.h"
+#include "lj_str.h"
+#include "lj_tab.h"
+#include "lj_strfmt.h"
+
+/* -- Buffer management --------------------------------------------------- */
+
+static void buf_grow(SBuf *sb, MSize sz)
+{
+ MSize osz = sbufsz(sb), len = sbuflen(sb), nsz = osz;
+ char *b;
+ GCSize flag;
+ if (nsz < LJ_MIN_SBUF) nsz = LJ_MIN_SBUF;
+ while (nsz < sz) nsz += nsz;
+ flag = sbufflag(sb);
+ if ((flag & SBUF_FLAG_COW)) { /* Copy-on-write semantics. */
+ lj_assertG_(G(sbufL(sb)), sb->w == sb->e, "bad SBuf COW");
+ b = (char *)lj_mem_new(sbufL(sb), nsz);
+ setsbufflag(sb, flag & ~(GCSize)SBUF_FLAG_COW);
+ setgcrefnull(sbufX(sb)->cowref);
+ memcpy(b, sb->b, osz);
+ } else {
+ b = (char *)lj_mem_realloc(sbufL(sb), sb->b, osz, nsz);
+ }
+ if ((flag & SBUF_FLAG_EXT)) {
+ sbufX(sb)->r = sbufX(sb)->r - sb->b + b; /* Adjust read pointer, too. */
+ }
+ /* Adjust buffer pointers. */
+ sb->b = b;
+ sb->w = b + len;
+ sb->e = b + nsz;
+ if ((flag & SBUF_FLAG_BORROW)) { /* Adjust borrowed buffer pointers. */
+ SBuf *bsb = mref(sbufX(sb)->bsb, SBuf);
+ bsb->b = b;
+ bsb->w = b + len;
+ bsb->e = b + nsz;
+ }
+}
+
+LJ_NOINLINE char *LJ_FASTCALL lj_buf_need2(SBuf *sb, MSize sz)
+{
+ lj_assertG_(G(sbufL(sb)), sz > sbufsz(sb), "SBuf overflow");
+ if (LJ_UNLIKELY(sz > LJ_MAX_BUF))
+ lj_err_mem(sbufL(sb));
+ buf_grow(sb, sz);
+ return sb->b;
+}
+
+LJ_NOINLINE char *LJ_FASTCALL lj_buf_more2(SBuf *sb, MSize sz)
+{
+ if (sbufisext(sb)) {
+ SBufExt *sbx = (SBufExt *)sb;
+ MSize len = sbufxlen(sbx);
+ if (LJ_UNLIKELY(sz > LJ_MAX_BUF || len + sz > LJ_MAX_BUF))
+ lj_err_mem(sbufL(sbx));
+ if (len + sz > sbufsz(sbx)) { /* Must grow. */
+ buf_grow((SBuf *)sbx, len + sz);
+ } else if (sbufiscow(sb) || sbufxslack(sbx) < (sbufsz(sbx) >> 3)) {
+ /* Also grow to avoid excessive compactions, if slack < size/8. */
+ buf_grow((SBuf *)sbx, sbuflen(sbx) + sz); /* Not sbufxlen! */
+ return sbx->w;
+ }
+ if (sbx->r != sbx->b) { /* Compact by moving down. */
+ memmove(sbx->b, sbx->r, len);
+ sbx->r = sbx->b;
+ sbx->w = sbx->b + len;
+ lj_assertG_(G(sbufL(sbx)), len + sz <= sbufsz(sbx), "bad SBuf compact");
+ }
+ } else {
+ MSize len = sbuflen(sb);
+ lj_assertG_(G(sbufL(sb)), sz > sbufleft(sb), "SBuf overflow");
+ if (LJ_UNLIKELY(sz > LJ_MAX_BUF || len + sz > LJ_MAX_BUF))
+ lj_err_mem(sbufL(sb));
+ buf_grow(sb, len + sz);
+ }
+ return sb->w;
+}
+
+void LJ_FASTCALL lj_buf_shrink(lua_State *L, SBuf *sb)
+{
+ char *b = sb->b;
+ MSize osz = (MSize)(sb->e - b);
+ if (osz > 2*LJ_MIN_SBUF) {
+ MSize n = (MSize)(sb->w - b);
+ b = lj_mem_realloc(L, b, osz, (osz >> 1));
+ sb->b = b;
+ sb->w = b + n;
+ sb->e = b + (osz >> 1);
+ }
+ lj_assertG_(G(sbufL(sb)), !sbufisext(sb), "YAGNI shrink SBufExt");
+}
+
+char * LJ_FASTCALL lj_buf_tmp(lua_State *L, MSize sz)
+{
+ SBuf *sb = &G(L)->tmpbuf;
+ setsbufL(sb, L);
+ return lj_buf_need(sb, sz);
+}
+
+#if LJ_HASBUFFER && LJ_HASJIT
+void lj_bufx_set(SBufExt *sbx, const char *p, MSize len, GCobj *ref)
+{
+ lua_State *L = sbufL(sbx);
+ lj_bufx_free(L, sbx);
+ lj_bufx_set_cow(L, sbx, p, len);
+ setgcref(sbx->cowref, ref);
+ lj_gc_objbarrier(L, (GCudata *)sbx - 1, ref);
+}
+
+#if LJ_HASFFI
+MSize LJ_FASTCALL lj_bufx_more(SBufExt *sbx, MSize sz)
+{
+ lj_buf_more((SBuf *)sbx, sz);
+ return sbufleft(sbx);
+}
+#endif
+#endif
+
+/* -- Low-level buffer put operations ------------------------------------- */
+
+SBuf *lj_buf_putmem(SBuf *sb, const void *q, MSize len)
+{
+ char *w = lj_buf_more(sb, len);
+ w = lj_buf_wmem(w, q, len);
+ sb->w = w;
+ return sb;
+}
+
+#if LJ_HASJIT || LJ_HASFFI
+static LJ_NOINLINE SBuf * LJ_FASTCALL lj_buf_putchar2(SBuf *sb, int c)
+{
+ char *w = lj_buf_more2(sb, 1);
+ *w++ = (char)c;
+ sb->w = w;
+ return sb;
+}
+
+SBuf * LJ_FASTCALL lj_buf_putchar(SBuf *sb, int c)
+{
+ char *w = sb->w;
+ if (LJ_LIKELY(w < sb->e)) {
+ *w++ = (char)c;
+ sb->w = w;
+ return sb;
+ }
+ return lj_buf_putchar2(sb, c);
+}
+#endif
+
+SBuf * LJ_FASTCALL lj_buf_putstr(SBuf *sb, GCstr *s)
+{
+ MSize len = s->len;
+ char *w = lj_buf_more(sb, len);
+ w = lj_buf_wmem(w, strdata(s), len);
+ sb->w = w;
+ return sb;
+}
+
+/* -- High-level buffer put operations ------------------------------------ */
+
+SBuf * LJ_FASTCALL lj_buf_putstr_reverse(SBuf *sb, GCstr *s)
+{
+ MSize len = s->len;
+ char *w = lj_buf_more(sb, len), *e = w+len;
+ const char *q = strdata(s)+len-1;
+ while (w < e)
+ *w++ = *q--;
+ sb->w = w;
+ return sb;
+}
+
+SBuf * LJ_FASTCALL lj_buf_putstr_lower(SBuf *sb, GCstr *s)
+{
+ MSize len = s->len;
+ char *w = lj_buf_more(sb, len), *e = w+len;
+ const char *q = strdata(s);
+ for (; w < e; w++, q++) {
+ uint32_t c = *(unsigned char *)q;
+#if LJ_TARGET_PPC
+ *w = c + ((c >= 'A' && c <= 'Z') << 5);
+#else
+ if (c >= 'A' && c <= 'Z') c += 0x20;
+ *w = c;
+#endif
+ }
+ sb->w = w;
+ return sb;
+}
+
+SBuf * LJ_FASTCALL lj_buf_putstr_upper(SBuf *sb, GCstr *s)
+{
+ MSize len = s->len;
+ char *w = lj_buf_more(sb, len), *e = w+len;
+ const char *q = strdata(s);
+ for (; w < e; w++, q++) {
+ uint32_t c = *(unsigned char *)q;
+#if LJ_TARGET_PPC
+ *w = c - ((c >= 'a' && c <= 'z') << 5);
+#else
+ if (c >= 'a' && c <= 'z') c -= 0x20;
+ *w = c;
+#endif
+ }
+ sb->w = w;
+ return sb;
+}
+
+SBuf *lj_buf_putstr_rep(SBuf *sb, GCstr *s, int32_t rep)
+{
+ MSize len = s->len;
+ if (rep > 0 && len) {
+ uint64_t tlen = (uint64_t)rep * len;
+ char *w;
+ if (LJ_UNLIKELY(tlen > LJ_MAX_STR))
+ lj_err_mem(sbufL(sb));
+ w = lj_buf_more(sb, (MSize)tlen);
+ if (len == 1) { /* Optimize a common case. */
+ uint32_t c = strdata(s)[0];
+ do { *w++ = c; } while (--rep > 0);
+ } else {
+ const char *e = strdata(s) + len;
+ do {
+ const char *q = strdata(s);
+ do { *w++ = *q++; } while (q < e);
+ } while (--rep > 0);
+ }
+ sb->w = w;
+ }
+ return sb;
+}
+
+SBuf *lj_buf_puttab(SBuf *sb, GCtab *t, GCstr *sep, int32_t i, int32_t e)
+{
+ MSize seplen = sep ? sep->len : 0;
+ if (i <= e) {
+ for (;;) {
+ cTValue *o = lj_tab_getint(t, i);
+ char *w;
+ if (!o) {
+ badtype: /* Error: bad element type. */
+ sb->w = (char *)(intptr_t)i; /* Store failing index. */
+ return NULL;
+ } else if (tvisstr(o)) {
+ MSize len = strV(o)->len;
+ w = lj_buf_wmem(lj_buf_more(sb, len + seplen), strVdata(o), len);
+ } else if (tvisint(o)) {
+ w = lj_strfmt_wint(lj_buf_more(sb, STRFMT_MAXBUF_INT+seplen), intV(o));
+ } else if (tvisnum(o)) {
+ w = lj_buf_more(lj_strfmt_putfnum(sb, STRFMT_G14, numV(o)), seplen);
+ } else {
+ goto badtype;
+ }
+ if (i++ == e) {
+ sb->w = w;
+ break;
+ }
+ if (seplen) w = lj_buf_wmem(w, strdata(sep), seplen);
+ sb->w = w;
+ }
+ }
+ return sb;
+}
+
+/* -- Miscellaneous buffer operations ------------------------------------- */
+
+GCstr * LJ_FASTCALL lj_buf_tostr(SBuf *sb)
+{
+ return lj_str_new(sbufL(sb), sb->b, sbuflen(sb));
+}
+
+/* Concatenate two strings. */
+GCstr *lj_buf_cat2str(lua_State *L, GCstr *s1, GCstr *s2)
+{
+ MSize len1 = s1->len, len2 = s2->len;
+ char *buf = lj_buf_tmp(L, len1 + len2);
+ memcpy(buf, strdata(s1), len1);
+ memcpy(buf+len1, strdata(s2), len2);
+ return lj_str_new(L, buf, len1 + len2);
+}
+
+/* Read ULEB128 from buffer. */
+uint32_t LJ_FASTCALL lj_buf_ruleb128(const char **pp)
+{
+ const uint8_t *w = (const uint8_t *)*pp;
+ uint32_t v = *w++;
+ if (LJ_UNLIKELY(v >= 0x80)) {
+ int sh = 0;
+ v &= 0x7f;
+ do { v |= ((*w & 0x7f) << (sh += 7)); } while (*w++ >= 0x80);
+ }
+ *pp = (const char *)w;
+ return v;
+}
+
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