mirror of
https://github.com/scummvm/scummvm.git
synced 2026-06-20 05:45:29 +00:00
files structure reorganization, compilation BROKEN. compilation will be fixed soon.
This commit is contained in:
Pawel Kolodziejski
@@ -0,0 +1,541 @@
|
||||
/*
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||||
** $Id$
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** Standard library for strings and pattern-matching
|
||||
** See Copyright Notice in lua.h
|
||||
*/
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||||
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||||
|
||||
#include <ctype.h>
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#include <stdio.h>
|
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#include <stdlib.h>
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#include <string.h>
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||||
|
||||
#include "lauxlib.h"
|
||||
#include "lua.h"
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#include "lualib.h"
|
||||
|
||||
|
||||
|
||||
static void addnchar (char *s, int n)
|
||||
{
|
||||
char *b = luaL_openspace(n);
|
||||
memcpy(b, s, n);
|
||||
luaL_addsize(n);
|
||||
}
|
||||
|
||||
|
||||
static void str_len (void)
|
||||
{
|
||||
long l;
|
||||
luaL_check_lstr(1, &l);
|
||||
lua_pushnumber(l);
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||||
}
|
||||
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||||
|
||||
static void closeandpush (void)
|
||||
{
|
||||
lua_pushlstring(luaL_buffer(), luaL_getsize());
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||||
}
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||||
|
||||
|
||||
static long posrelat (long pos, long len)
|
||||
{
|
||||
/* relative string position: negative means back from end */
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||||
return (pos>=0) ? pos : len+pos+1;
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||||
}
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||||
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||||
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||||
static void str_sub (void)
|
||||
{
|
||||
long l;
|
||||
char *s = luaL_check_lstr(1, &l);
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||||
long start = posrelat((int)luaL_check_number(2), l);
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||||
long end = posrelat((int)luaL_opt_number(3, -1), l);
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||||
if (1 <= start && start <= end && end <= l)
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lua_pushlstring(s+start-1, end-start+1);
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||||
else lua_pushstring("");
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||||
}
|
||||
|
||||
|
||||
static void str_lower (void)
|
||||
{
|
||||
long l;
|
||||
int i;
|
||||
char *s = luaL_check_lstr(1, &l);
|
||||
luaL_resetbuffer();
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||||
for (i=0; i<l; i++)
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||||
luaL_addchar(tolower((unsigned char)(s[i])));
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closeandpush();
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||||
}
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||||
|
||||
|
||||
static void str_upper (void)
|
||||
{
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||||
long l;
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||||
int i;
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||||
char *s = luaL_check_lstr(1, &l);
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luaL_resetbuffer();
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||||
for (i=0; i<l; i++)
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||||
luaL_addchar(toupper((unsigned char)(s[i])));
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closeandpush();
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||||
}
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||||
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||||
static void str_rep (void)
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||||
{
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long l;
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||||
char *s = luaL_check_lstr(1, &l);
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int n = (int)luaL_check_number(2);
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luaL_resetbuffer();
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while (n-- > 0)
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addnchar(s, l);
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closeandpush();
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||||
}
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||||
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||||
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||||
static void str_byte (void)
|
||||
{
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||||
long l;
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||||
char *s = luaL_check_lstr(1, &l);
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long pos = posrelat((int)luaL_opt_number(2, 1), l);
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||||
luaL_arg_check(0<pos && pos<=l, 2, "out of range");
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lua_pushnumber((unsigned char)s[pos-1]);
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}
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||||
static void str_char (void) {
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int i = 0;
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||||
luaL_resetbuffer();
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while (lua_getparam(++i) != LUA_NOOBJECT) {
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||||
double c = luaL_check_number(i);
|
||||
luaL_arg_check((unsigned char)c == c, i, "invalid value");
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||||
luaL_addchar((int)c);
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||||
}
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||||
closeandpush();
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||||
}
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||||
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||||
/*
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||||
** =======================================================
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||||
** PATTERN MATCHING
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||||
** =======================================================
|
||||
*/
|
||||
|
||||
#define MAX_CAPT 9
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||||
|
||||
struct Capture {
|
||||
int level; /* total number of captures (finished or unfinished) */
|
||||
char *src_end; /* end ('\0') of source string */
|
||||
struct {
|
||||
char *init;
|
||||
int len; /* -1 signals unfinished capture */
|
||||
} capture[MAX_CAPT];
|
||||
};
|
||||
|
||||
|
||||
#define ESC '%'
|
||||
#define SPECIALS "^$*?.([%-"
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||||
|
||||
|
||||
static void push_captures (struct Capture *cap)
|
||||
{
|
||||
int i;
|
||||
for (i=0; i<cap->level; i++)
|
||||
lua_pushlstring(cap->capture[i].init, cap->capture[i].len);
|
||||
}
|
||||
|
||||
|
||||
static int check_cap (int l, struct Capture *cap)
|
||||
{
|
||||
l -= '1';
|
||||
if (!(0 <= l && l < cap->level && cap->capture[l].len != -1))
|
||||
lua_error("invalid capture index");
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||||
return l;
|
||||
}
|
||||
|
||||
|
||||
static int capture_to_close (struct Capture *cap)
|
||||
{
|
||||
int level = cap->level;
|
||||
for (level--; level>=0; level--)
|
||||
if (cap->capture[level].len == -1) return level;
|
||||
lua_error("invalid pattern capture");
|
||||
return 0; /* to avoid warnings */
|
||||
}
|
||||
|
||||
|
||||
static char *bracket_end (char *p)
|
||||
{
|
||||
return (*p == 0) ? NULL : strchr((*p=='^') ? p+2 : p+1, ']');
|
||||
}
|
||||
|
||||
|
||||
static int matchclass (int c, int cl)
|
||||
{
|
||||
int res;
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||||
switch (tolower(cl)) {
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||||
case 'a' : res = isalpha(c); break;
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||||
case 'c' : res = iscntrl(c); break;
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||||
case 'd' : res = isdigit(c); break;
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||||
case 'l' : res = islower(c); break;
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||||
case 'p' : res = ispunct(c); break;
|
||||
case 's' : res = isspace(c); break;
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||||
case 'u' : res = isupper(c); break;
|
||||
case 'w' : res = isalnum(c); break;
|
||||
case 'z' : res = (c == '\0'); break;
|
||||
default: return (cl == c);
|
||||
}
|
||||
return (islower((unsigned char)cl) ? res : !res);
|
||||
}
|
||||
|
||||
|
||||
int luaI_singlematch (int c, char *p, char **ep)
|
||||
{
|
||||
switch (*p) {
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||||
case '.': /* matches any char */
|
||||
*ep = p+1;
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||||
return 1;
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||||
case '\0': /* end of pattern; matches nothing */
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||||
*ep = p;
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||||
return 0;
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||||
case ESC:
|
||||
if (*(++p) == '\0')
|
||||
luaL_verror("incorrect pattern (ends with `%c')", ESC);
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||||
*ep = p+1;
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||||
return matchclass(c, (unsigned char)*p);
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||||
case '[': {
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||||
char *end = bracket_end(p+1);
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||||
int sig = *(p+1) == '^' ? (p++, 0) : 1;
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||||
if (end == NULL) lua_error("incorrect pattern (missing `]')");
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||||
*ep = end+1;
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||||
while (++p < end) {
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||||
if (*p == ESC) {
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||||
if (((p+1) < end) && matchclass(c, (unsigned char)*++p))
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||||
return sig;
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||||
}
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||||
else if ((*(p+1) == '-') && (p+2 < end)) {
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||||
p+=2;
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||||
if ((unsigned char)*(p-2) <= c && c <= (unsigned char)*p)
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||||
return sig;
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||||
}
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||||
else if ((unsigned char)*p == c) return sig;
|
||||
}
|
||||
return !sig;
|
||||
}
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||||
default:
|
||||
*ep = p+1;
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||||
return ((unsigned char)*p == c);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static char *matchbalance (char *s, int b, int e, struct Capture *cap)
|
||||
{
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||||
if (*s != b) return NULL;
|
||||
else {
|
||||
int cont = 1;
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||||
while (++s < cap->src_end) {
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||||
if (*s == e) {
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||||
if (--cont == 0) return s+1;
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||||
}
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||||
else if (*s == b) cont++;
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||||
}
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||||
}
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||||
return NULL; /* string ends out of balance */
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||||
}
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||||
|
||||
|
||||
static char *matchitem (char *s, char *p, struct Capture *cap, char **ep)
|
||||
{
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||||
if (*p == ESC) {
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p++;
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||||
if (isdigit((unsigned char)*p)) { /* capture */
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||||
int l = check_cap(*p, cap);
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||||
int len = cap->capture[l].len;
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*ep = p+1;
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if (cap->src_end-s >= len && memcmp(cap->capture[l].init, s, len) == 0)
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return s+len;
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||||
else return NULL;
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}
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else if (*p == 'b') { /* balanced string */
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||||
p++;
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||||
if (*p == 0 || *(p+1) == 0)
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||||
lua_error("unbalanced pattern");
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||||
*ep = p+2;
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||||
return matchbalance(s, *p, *(p+1), cap);
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||||
}
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||||
else p--; /* and go through */
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||||
}
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||||
/* "luaI_singlematch" sets "ep" (so must be called even when *s == 0) */
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||||
return (luaI_singlematch((unsigned char)*s, p, ep) && s<cap->src_end) ?
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||||
s+1 : NULL;
|
||||
}
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||||
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||||
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||||
static char *match (char *s, char *p, struct Capture *cap)
|
||||
{
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||||
init: /* using goto's to optimize tail recursion */
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||||
switch (*p) {
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||||
case '(': { /* start capture */
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||||
char *res;
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||||
if (cap->level >= MAX_CAPT) lua_error("too many captures");
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||||
cap->capture[cap->level].init = s;
|
||||
cap->capture[cap->level].len = -1;
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||||
cap->level++;
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||||
if ((res=match(s, p+1, cap)) == NULL) /* match failed? */
|
||||
cap->level--; /* undo capture */
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||||
return res;
|
||||
}
|
||||
case ')': { /* end capture */
|
||||
int l = capture_to_close(cap);
|
||||
char *res;
|
||||
cap->capture[l].len = s - cap->capture[l].init; /* close capture */
|
||||
if ((res = match(s, p+1, cap)) == NULL) /* match failed? */
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||||
cap->capture[l].len = -1; /* undo capture */
|
||||
return res;
|
||||
}
|
||||
case '\0': case '$': /* (possibly) end of pattern */
|
||||
if (*p == 0 || (*(p+1) == 0 && s == cap->src_end))
|
||||
return s;
|
||||
/* else go through */
|
||||
default: { /* it is a pattern item */
|
||||
char *ep; /* get what is next */
|
||||
char *s1 = matchitem(s, p, cap, &ep);
|
||||
switch (*ep) {
|
||||
case '*': { /* repetition */
|
||||
char *res;
|
||||
if (s1 && s1>s && ((res=match(s1, p, cap)) != NULL))
|
||||
return res;
|
||||
p=ep+1; goto init; /* else return match(s, ep+1, cap); */
|
||||
}
|
||||
case '?': { /* optional */
|
||||
char *res;
|
||||
if (s1 && ((res=match(s1, ep+1, cap)) != NULL))
|
||||
return res;
|
||||
p=ep+1; goto init; /* else return match(s, ep+1, cap); */
|
||||
}
|
||||
case '-': { /* repetition */
|
||||
char *res;
|
||||
if ((res = match(s, ep+1, cap)) != NULL)
|
||||
return res;
|
||||
else if (s1 && s1>s) {
|
||||
s = s1;
|
||||
goto init; /* return match(s1, p, cap); */
|
||||
}
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
default:
|
||||
if (s1) { s=s1; p=ep; goto init; } /* return match(s1, ep, cap); */
|
||||
else return NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void str_find (void)
|
||||
{
|
||||
long l;
|
||||
char *s = luaL_check_lstr(1, &l);
|
||||
char *p = luaL_check_string(2);
|
||||
long init = posrelat((int)luaL_opt_number(3, 1), l) - 1;
|
||||
struct Capture cap;
|
||||
luaL_arg_check(0 <= init && init <= l, 3, "out of range");
|
||||
if (lua_getparam(4) != LUA_NOOBJECT ||
|
||||
strpbrk(p, SPECIALS) == NULL) { /* no special characters? */
|
||||
char *s2 = strstr(s+init, p);
|
||||
if (s2) {
|
||||
lua_pushnumber(s2-s+1);
|
||||
lua_pushnumber(s2-s+strlen(p));
|
||||
return;
|
||||
}
|
||||
}
|
||||
else {
|
||||
int anchor = (*p == '^') ? (p++, 1) : 0;
|
||||
char *s1=s+init;
|
||||
cap.src_end = s+l;
|
||||
do {
|
||||
char *res;
|
||||
cap.level = 0;
|
||||
if ((res=match(s1, p, &cap)) != NULL) {
|
||||
lua_pushnumber(s1-s+1); /* start */
|
||||
lua_pushnumber(res-s); /* end */
|
||||
push_captures(&cap);
|
||||
return;
|
||||
}
|
||||
} while (s1++<cap.src_end && !anchor);
|
||||
}
|
||||
lua_pushnil(); /* if arrives here, it didn't find */
|
||||
}
|
||||
|
||||
|
||||
static void add_s (lua_Object newp, struct Capture *cap)
|
||||
{
|
||||
if (lua_isstring(newp)) {
|
||||
char *news = lua_getstring(newp);
|
||||
int l = lua_strlen(newp);
|
||||
int i;
|
||||
for (i=0; i<l; i++) {
|
||||
if (news[i] != ESC)
|
||||
luaL_addchar(news[i]);
|
||||
else {
|
||||
i++; /* skip ESC */
|
||||
if (!isdigit((unsigned char)news[i]))
|
||||
luaL_addchar(news[i]);
|
||||
else {
|
||||
int level = check_cap(news[i], cap);
|
||||
addnchar(cap->capture[level].init, cap->capture[level].len);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
else { /* is a function */
|
||||
lua_Object res;
|
||||
int status;
|
||||
int oldbuff;
|
||||
lua_beginblock();
|
||||
push_captures(cap);
|
||||
/* function may use buffer, so save it and create a new one */
|
||||
oldbuff = luaL_newbuffer(0);
|
||||
status = lua_callfunction(newp);
|
||||
/* restore old buffer */
|
||||
luaL_oldbuffer(oldbuff);
|
||||
if (status != 0) {
|
||||
lua_endblock();
|
||||
lua_error(NULL);
|
||||
}
|
||||
res = lua_getresult(1);
|
||||
if (lua_isstring(res))
|
||||
addnchar(lua_getstring(res), lua_strlen(res));
|
||||
lua_endblock();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void str_gsub (void)
|
||||
{
|
||||
long srcl;
|
||||
char *src = luaL_check_lstr(1, &srcl);
|
||||
char *p = luaL_check_string(2);
|
||||
lua_Object newp = lua_getparam(3);
|
||||
int max_s = (int)luaL_opt_number(4, srcl+1);
|
||||
int anchor = (*p == '^') ? (p++, 1) : 0;
|
||||
int n = 0;
|
||||
struct Capture cap;
|
||||
luaL_arg_check(lua_isstring(newp) || lua_isfunction(newp), 3,
|
||||
"string or function expected");
|
||||
luaL_resetbuffer();
|
||||
cap.src_end = src+srcl;
|
||||
while (n < max_s) {
|
||||
char *e;
|
||||
cap.level = 0;
|
||||
e = match(src, p, &cap);
|
||||
if (e) {
|
||||
n++;
|
||||
add_s(newp, &cap);
|
||||
}
|
||||
if (e && e>src) /* non empty match? */
|
||||
src = e; /* skip it */
|
||||
else if (src < cap.src_end)
|
||||
luaL_addchar(*src++);
|
||||
else break;
|
||||
if (anchor) break;
|
||||
}
|
||||
addnchar(src, cap.src_end-src);
|
||||
closeandpush();
|
||||
lua_pushnumber(n); /* number of substitutions */
|
||||
}
|
||||
|
||||
|
||||
static void luaI_addquoted (char *s)
|
||||
{
|
||||
luaL_addchar('"');
|
||||
for (; *s; s++) {
|
||||
if (strchr("\"\\\n", *s))
|
||||
luaL_addchar('\\');
|
||||
luaL_addchar(*s);
|
||||
}
|
||||
luaL_addchar('"');
|
||||
}
|
||||
|
||||
#define MAX_FORMAT 200
|
||||
|
||||
static void str_format (void)
|
||||
{
|
||||
int arg = 1;
|
||||
char *strfrmt = luaL_check_string(arg);
|
||||
struct Capture cap;
|
||||
cap.src_end = strfrmt+strlen(strfrmt)+1;
|
||||
luaL_resetbuffer();
|
||||
while (*strfrmt) {
|
||||
if (*strfrmt != '%')
|
||||
luaL_addchar(*strfrmt++);
|
||||
else if (*++strfrmt == '%')
|
||||
luaL_addchar(*strfrmt++); /* %% */
|
||||
else { /* format item */
|
||||
char form[MAX_FORMAT]; /* store the format ('%...') */
|
||||
char *buff;
|
||||
char *initf = strfrmt;
|
||||
form[0] = '%';
|
||||
cap.level = 0;
|
||||
if (isdigit((unsigned char)initf[0]) && initf[1] == '$') {
|
||||
arg = initf[0] - '0';
|
||||
initf += 2; /* skip the 'n$' */
|
||||
}
|
||||
arg++;
|
||||
strfrmt = match(initf, "[-+ #0]*(%d*)%.?(%d*)", &cap);
|
||||
if (cap.capture[0].len > 2 || cap.capture[1].len > 2) /* < 100? */
|
||||
lua_error("invalid format (width or precision too long)");
|
||||
strncpy(form+1, initf, strfrmt-initf+1); /* +1 to include conversion */
|
||||
form[strfrmt-initf+2] = 0;
|
||||
buff = luaL_openspace(1000); /* to store the formatted value */
|
||||
switch (*strfrmt++) {
|
||||
case 'q':
|
||||
luaI_addquoted(luaL_check_string(arg));
|
||||
continue;
|
||||
case 's': {
|
||||
char *s = luaL_check_string(arg);
|
||||
buff = luaL_openspace(strlen(s));
|
||||
sprintf(buff, form, s);
|
||||
break;
|
||||
}
|
||||
case 'c': case 'd': case 'i':
|
||||
sprintf(buff, form, (int)luaL_check_number(arg));
|
||||
break;
|
||||
case 'o': case 'u': case 'x': case 'X':
|
||||
sprintf(buff, form, (unsigned int)luaL_check_number(arg));
|
||||
break;
|
||||
case 'e': case 'E': case 'f': case 'g': case 'G':
|
||||
sprintf(buff, form, luaL_check_number(arg));
|
||||
break;
|
||||
default: /* also treat cases 'pnLlh' */
|
||||
lua_error("invalid option in `format'");
|
||||
}
|
||||
luaL_addsize(strlen(buff));
|
||||
}
|
||||
}
|
||||
closeandpush(); /* push the result */
|
||||
}
|
||||
|
||||
|
||||
static struct luaL_reg strlib[] = {
|
||||
{"strlen", str_len},
|
||||
{"strsub", str_sub},
|
||||
{"strlower", str_lower},
|
||||
{"strupper", str_upper},
|
||||
{"strchar", str_char},
|
||||
{"strrep", str_rep},
|
||||
{"ascii", str_byte}, /* for compatibility */
|
||||
{"strbyte", str_byte},
|
||||
{"format", str_format},
|
||||
{"strfind", str_find},
|
||||
{"gsub", str_gsub}
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
** Open string library
|
||||
*/
|
||||
void strlib_open (void)
|
||||
{
|
||||
luaL_openlib(strlib, (sizeof(strlib)/sizeof(strlib[0])));
|
||||
}
|
||||
Reference in New Issue
Block a user