public Object compileRegExp(Context cx, String source, String flags) {
return NativeRegExp.compileRE(cx, source, flags, false);
}
public int find_split(
Context cx,
Scriptable scope,
String target,
String separator,
Scriptable reObj,
int[] ip,
int[] matchlen,
boolean[] matched,
String[][] parensp) {
int i = ip[0];
int length = target.length();
int result;
int version = cx.getLanguageVersion();
NativeRegExp re = (NativeRegExp) reObj;
again:
while (true) { // imitating C label
/* JS1.2 deviated from Perl by never matching at end of string. */
int ipsave = ip[0]; // reuse ip to save object creation
ip[0] = i;
Object ret = re.executeRegExp(cx, scope, this, target, ip, NativeRegExp.TEST);
if (ret != Boolean.TRUE) {
// Mismatch: ensure our caller advances i past end of string.
ip[0] = ipsave;
matchlen[0] = 1;
matched[0] = false;
return length;
}
i = ip[0];
ip[0] = ipsave;
matched[0] = true;
SubString sep = this.lastMatch;
matchlen[0] = sep.length;
if (matchlen[0] == 0) {
/*
* Empty string match: never split on an empty
* match at the start of a find_split cycle. Same
* rule as for an empty global match in
* match_or_replace.
*/
if (i == ip[0]) {
/*
* "Bump-along" to avoid sticking at an empty
* match, but don't bump past end of string --
* our caller must do that by adding
* sep->length to our return value.
*/
if (i == length) {
if (version == Context.VERSION_1_2) {
matchlen[0] = 1;
result = i;
} else result = -1;
break;
}
i++;
continue again; // imitating C goto
}
}
// PR_ASSERT((size_t)i >= sep->length);
result = i - matchlen[0];
break;
}
int size = (parens == null) ? 0 : parens.length;
parensp[0] = new String[size];
for (int num = 0; num < size; num++) {
SubString parsub = getParenSubString(num);
parensp[0][num] = parsub.toString();
}
return result;
}
private static SubString interpretDollar(
Context cx, RegExpImpl res, String da, int dp, int[] skip) {
char dc;
int num, tmp;
if (da.charAt(dp) != '$') Kit.codeBug();
/* Allow a real backslash (literal "\\") to escape "$1" etc. */
int version = cx.getLanguageVersion();
if (version != Context.VERSION_DEFAULT && version <= Context.VERSION_1_4) {
if (dp > 0 && da.charAt(dp - 1) == '\\') return null;
}
int daL = da.length();
if (dp + 1 >= daL) return null;
/* Interpret all Perl match-induced dollar variables. */
dc = da.charAt(dp + 1);
if (NativeRegExp.isDigit(dc)) {
int cp;
if (version != Context.VERSION_DEFAULT && version <= Context.VERSION_1_4) {
if (dc == '0') return null;
/* Check for overflow to avoid gobbling arbitrary decimal digits. */
num = 0;
cp = dp;
while (++cp < daL && NativeRegExp.isDigit(dc = da.charAt(cp))) {
tmp = 10 * num + (dc - '0');
if (tmp < num) break;
num = tmp;
}
} else {
/* ECMA 3, 1-9 or 01-99 */
int parenCount = (res.parens == null) ? 0 : res.parens.length;
num = dc - '0';
if (num > parenCount) return null;
cp = dp + 2;
if ((dp + 2) < daL) {
dc = da.charAt(dp + 2);
if (NativeRegExp.isDigit(dc)) {
tmp = 10 * num + (dc - '0');
if (tmp <= parenCount) {
cp++;
num = tmp;
}
}
}
if (num == 0) return null; /* $0 or $00 is not valid */
}
/* Adjust num from 1 $n-origin to 0 array-index-origin. */
num--;
skip[0] = cp - dp;
return res.getParenSubString(num);
}
skip[0] = 2;
switch (dc) {
case '$':
return new SubString("$");
case '&':
return res.lastMatch;
case '+':
return res.lastParen;
case '`':
if (version == Context.VERSION_1_2) {
/*
* JS1.2 imitated the Perl4 bug where left context at each step
* in an iterative use of a global regexp started from last match,
* not from the start of the target string. But Perl4 does start
* $` at the beginning of the target string when it is used in a
* substitution, so we emulate that special case here.
*/
res.leftContext.index = 0;
res.leftContext.length = res.lastMatch.index;
}
return res.leftContext;
case '\'':
return res.rightContext;
}
return null;
}
/** Analog of C match_or_replace. */
private static Object matchOrReplace(
Context cx,
Scriptable scope,
Scriptable thisObj,
Object[] args,
RegExpImpl reImpl,
GlobData data,
boolean forceFlat) {
NativeRegExp re;
String str = ScriptRuntime.toString(thisObj);
data.str = str;
Scriptable topScope = ScriptableObject.getTopLevelScope(scope);
if (args.length == 0) {
Object compiled = NativeRegExp.compileRE(cx, "", "", false);
re = new NativeRegExp(topScope, compiled);
} else if (args[0] instanceof NativeRegExp) {
re = (NativeRegExp) args[0];
} else {
String src = ScriptRuntime.toString(args[0]);
String opt;
if (data.optarg < args.length) {
args[0] = src;
opt = ScriptRuntime.toString(args[data.optarg]);
} else {
opt = null;
}
Object compiled = NativeRegExp.compileRE(cx, src, opt, forceFlat);
re = new NativeRegExp(topScope, compiled);
}
data.regexp = re;
data.global = (re.getFlags() & NativeRegExp.JSREG_GLOB) != 0;
int[] indexp = {0};
Object result = null;
if (data.mode == RA_SEARCH) {
result = re.executeRegExp(cx, scope, reImpl, str, indexp, NativeRegExp.TEST);
if (result != null && result.equals(Boolean.TRUE))
result = new Integer(reImpl.leftContext.length);
else result = new Integer(-1);
} else if (data.global) {
re.lastIndex = 0;
for (int count = 0; indexp[0] <= str.length(); count++) {
result = re.executeRegExp(cx, scope, reImpl, str, indexp, NativeRegExp.TEST);
if (result == null || !result.equals(Boolean.TRUE)) break;
if (data.mode == RA_MATCH) {
match_glob(data, cx, scope, count, reImpl);
} else {
if (data.mode != RA_REPLACE) Kit.codeBug();
SubString lastMatch = reImpl.lastMatch;
int leftIndex = data.leftIndex;
int leftlen = lastMatch.index - leftIndex;
data.leftIndex = lastMatch.index + lastMatch.length;
replace_glob(data, cx, scope, reImpl, leftIndex, leftlen);
}
if (reImpl.lastMatch.length == 0) {
if (indexp[0] == str.length()) break;
indexp[0]++;
}
}
} else {
result =
re.executeRegExp(
cx,
scope,
reImpl,
str,
indexp,
((data.mode == RA_REPLACE) ? NativeRegExp.TEST : NativeRegExp.MATCH));
}
return result;
}