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Roberto Ierusalimschy 2004-12-01 13:46:06 -02:00
parent 0e002005b1
commit 0ed8519127
1 changed files with 12 additions and 14 deletions
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26
lstrlib.c
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@ -1,5 +1,5 @@
/*
** $Id: lstrlib.c,v 1.107 2004/11/01 14:33:33 roberto Exp roberto $
** $Id: lstrlib.c,v 1.108 2004/11/19 16:58:43 roberto Exp roberto $
** Standard library for string operations and pattern-matching
** See Copyright Notice in lua.h
*/
@ -24,8 +24,6 @@
#define uchar(c) ((unsigned char)(c))
typedef lua_Integer sint32; /* a signed version for size_t */
static int str_len (lua_State *L) {
size_t l;
@ -35,19 +33,19 @@ static int str_len (lua_State *L) {
}
static sint32 posrelat (sint32 pos, size_t len) {
static ptrdiff_t posrelat (ptrdiff_t pos, size_t len) {
/* relative string position: negative means back from end */
return (pos>=0) ? pos : (sint32)len+pos+1;
return (pos>=0) ? pos : (ptrdiff_t)len+pos+1;
}
static int str_sub (lua_State *L) {
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
sint32 start = posrelat(luaL_checkinteger(L, 2), l);
sint32 end = posrelat(luaL_optinteger(L, 3, -1), l);
ptrdiff_t start = posrelat(luaL_checkinteger(L, 2), l);
ptrdiff_t end = posrelat(luaL_optinteger(L, 3, -1), l);
if (start < 1) start = 1;
if (end > (sint32)l) end = (sint32)l;
if (end > (ptrdiff_t)l) end = (ptrdiff_t)l;
if (start <= end)
lua_pushlstring(L, s+start-1, end-start+1);
else lua_pushliteral(L, "");
@ -107,8 +105,8 @@ static int str_rep (lua_State *L) {
static int str_byte (lua_State *L) {
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
sint32 posi = posrelat(luaL_optinteger(L, 2, 1), l);
sint32 pose = posrelat(luaL_optinteger(L, 3, posi), l);
ptrdiff_t posi = posrelat(luaL_optinteger(L, 2, 1), l);
ptrdiff_t pose = posrelat(luaL_optinteger(L, 3, posi), l);
int n, i;
if (posi <= 0) posi = 1;
if ((size_t)pose > l) pose = l;
@ -173,7 +171,7 @@ typedef struct MatchState {
int level; /* total number of captures (finished or unfinished) */
struct {
const char *init;
sint32 len;
ptrdiff_t len;
} capture[MAX_CAPTURES];
} MatchState;
@ -299,7 +297,7 @@ static const char *matchbalance (MatchState *ms, const char *s,
static const char *max_expand (MatchState *ms, const char *s,
const char *p, const char *ep) {
sint32 i = 0; /* counts maximum expand for item */
ptrdiff_t i = 0; /* counts maximum expand for item */
while ((s+i)<ms->src_end && singlematch(uchar(*(s+i)), p, ep))
i++;
/* keeps trying to match with the maximum repetitions */
@ -490,9 +488,9 @@ static int str_find (lua_State *L) {
size_t l1, l2;
const char *s = luaL_checklstring(L, 1, &l1);
const char *p = luaL_checklstring(L, 2, &l2);
sint32 init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1;
ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1;
if (init < 0) init = 0;
else if ((size_t)(init) > l1) init = (sint32)l1;
else if ((size_t)(init) > l1) init = (ptrdiff_t)l1;
if (lua_toboolean(L, 4) || /* explicit request? */
strpbrk(p, SPECIALS) == NULL) { /* or no special characters? */
/* do a plain search */