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UTF-8 encoding exported as format '%U' in 'lua_pushfstring'

This commit is contained in:
Roberto Ierusalimschy 2014-02-06 13:59:24 -02:00
parent d438e1379d
commit 4ea60463f5
3 changed files with 37 additions and 21 deletions
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25
llex.c
View File

@ -1,5 +1,5 @@
/*
** $Id: llex.c,v 2.71 2014/01/31 15:14:22 roberto Exp roberto $
** $Id: llex.c,v 2.72 2014/02/04 18:57:34 roberto Exp roberto $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
@ -359,22 +359,11 @@ static unsigned int readutf8esc (LexState *ls) {
}
static void utf8esc (LexState *ls, unsigned int r) {
if (r < 0x80) /* ascii? */
save(ls, r);
else { /* need continuation bytes */
int buff[4]; /* to store continuation bytes */
int n = 0; /* number of continuation bytes */
unsigned int mfb = 0x3f; /* maximum that fits in first byte */
do {
buff[n++] = 0x80 | (r & 0x3f); /* add continuation byte */
r >>= 6; /* remove added bits */
mfb >>= 1; /* now there is one less bit in first byte */
} while (r > mfb); /* needs continuation byte? */
save(ls, (~mfb << 1) | r); /* add first byte */
while (n-- > 0) /* add 'buff' to string, reversed */
save(ls, buff[n]);
}
static void utf8esc (LexState *ls) {
char buff[UTF8BUFFSZ];
int n = luaO_utf8esc(buff, readutf8esc(ls));
for (; n > 0; n--) /* add 'buff' to string */
save(ls, buff[UTF8BUFFSZ - n]);
}
@ -414,7 +403,7 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
case 't': c = '\t'; goto read_save;
case 'v': c = '\v'; goto read_save;
case 'x': c = readhexaesc(ls); goto read_save;
case 'u': utf8esc(ls, readutf8esc(ls)); goto no_save;
case 'u': utf8esc(ls); goto no_save;
case '\n': case '\r':
inclinenumber(ls); c = '\n'; goto only_save;
case '\\': case '\"': case '\'':

28
lobject.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lobject.c,v 2.71 2013/12/30 20:47:58 roberto Exp roberto $
** $Id: lobject.c,v 2.72 2014/01/27 13:34:32 roberto Exp roberto $
** Some generic functions over Lua objects
** See Copyright Notice in lua.h
*/
@ -284,12 +284,30 @@ int luaO_str2int (const char *s, size_t len, lua_Integer *result) {
}
int luaO_utf8esc (char *buff, unsigned int x) {
int n = 1; /* number of bytes put in buffer (backwards) */
if (x < 0x80) /* ascii? */
buff[UTF8BUFFSZ - 1] = x;
else { /* need continuation bytes */
unsigned int mfb = 0x3f; /* maximum that fits in first byte */
do {
buff[UTF8BUFFSZ - (n++)] = 0x80 | (x & 0x3f); /* add continuation byte */
x >>= 6; /* remove added bits */
mfb >>= 1; /* now there is one less bit available in first byte */
} while (x > mfb); /* still needs continuation byte? */
buff[UTF8BUFFSZ - n] = (~mfb << 1) | x; /* add first byte */
}
return n;
}
static void pushstr (lua_State *L, const char *str, size_t l) {
setsvalue2s(L, L->top++, luaS_newlstr(L, str, l));
}
/* this function handles only `%d', `%c', %f, %p, and `%s' formats */
/* this function handles only '%d', '%c', '%f', '%p', and '%s'
conventional formats, plus Lua-specific '%L' and '%U' */
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
int n = 0;
for (;;) {
@ -328,6 +346,12 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
pushstr(L, buff, l);
break;
}
case 'U': {
char buff[UTF8BUFFSZ];
int l = luaO_utf8esc(buff, va_arg(argp, int));
pushstr(L, buff + UTF8BUFFSZ - l, l);
break;
}
case '%': {
pushstr(L, "%", 1);
break;

5
lobject.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lobject.h,v 2.82 2013/09/05 19:31:49 roberto Exp roberto $
** $Id: lobject.h,v 2.83 2013/12/04 12:15:22 roberto Exp roberto $
** Type definitions for Lua objects
** See Copyright Notice in lua.h
*/
@ -479,9 +479,12 @@ typedef struct Table {
LUAI_DDEC const TValue luaO_nilobject_;
/* size of buffer for 'luaO_utf8esc' function */
#define UTF8BUFFSZ 8
LUAI_FUNC int luaO_int2fb (unsigned int x);
LUAI_FUNC int luaO_fb2int (int x);
LUAI_FUNC int luaO_utf8esc (char *buff, unsigned int x);
LUAI_FUNC int luaO_ceillog2 (unsigned int x);
LUAI_FUNC void luaO_arith (lua_State *L, int op, const TValue *p1,
const TValue *p2, TValue *res);