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Optimize and refactor printing of numbers to buffers.

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This commit is contained in:
Mike Pall
2013-03-25 16:41:13 +01:00
parent 3b0b3afbb1
commit 59329cfbbf
5 changed files with 70 additions and 63 deletions
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17
src/lib_string.c
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@@ -881,14 +881,10 @@ LJLIB_CF(string_format)
tv.n = lj_lib_checknum(L, arg);
if (LJ_UNLIKELY((tv.u32.hi << 1) >= 0xffe00000)) {
/* Canonicalize output of non-finite values. */
char *p, nbuf[LJ_STR_NUMBUF];
MSize n = lj_str_bufnum(nbuf, &tv);
if (fmt[-1] < 'a') {
nbuf[n-3] = nbuf[n-3] - 0x20;
nbuf[n-2] = nbuf[n-2] - 0x20;
nbuf[n-1] = nbuf[n-1] - 0x20;
}
nbuf[n] = '\0';
char nbuf[LJ_STR_NUMBUF];
char *p = lj_str_bufnum(nbuf, &tv);
if (fmt[-1] < 'a') { *(p-3) -= 0x20; *(p-2) -= 0x20; *(p-1) -= 0x20; }
*p = '\0';
for (p = spec; *p < 'A' && *p != '.'; p++) ;
*p++ = 's'; *p = '\0';
len = (MSize)sprintf(buf, spec, nbuf);
@@ -901,8 +897,9 @@ LJLIB_CF(string_format)
string_fmt_quoted(sb, lj_lib_checkstr(L, arg));
continue;
case 'p':
len = lj_str_bufptr(buf, lua_topointer(L, arg));
break;
setsbufP(sb, lj_str_bufptr(lj_buf_more(sb, LJ_STR_PTRBUF),
lua_topointer(L, arg)));
continue;
case 's': {
GCstr *str = string_fmt_tostring(L, arg);
if (!strchr(spec, '.') && str->len >= 100) { /* Format overflow? */