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+/*
+ * @file ejsString.c
+ * @brief EJScript string class
+ */
+/********************************* Copyright **********************************/
+/*
+ * @copy default
+ *
+ * Copyright (c) Mbedthis Software LLC, 2003-2006. All Rights Reserved.
+ * Copyright (c) Michael O'Brien, 1994-1995. All Rights Reserved.
+ *
+ * This software is distributed under commercial and open source licenses.
+ * You may use the GPL open source license described below or you may acquire
+ * a commercial license from Mbedthis Software. You agree to be fully bound
+ * by the terms of either license. Consult the LICENSE.TXT distributed with
+ * this software for full details.
+ *
+ * This software is open source; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See the GNU General Public License for more
+ * details at: http://www.mbedthis.com/downloads/gplLicense.html
+ *
+ * This program is distributed WITHOUT ANY WARRANTY; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * This GPL license does NOT permit incorporating this software into
+ * proprietary programs. If you are unable to comply with the GPL, you must
+ * acquire a commercial license to use this software. Commercial licenses
+ * for this software and support services are available from Mbedthis
+ * Software at http://www.mbedthis.com
+ *
+ * @end
+ */
+/********************************** Includes **********************************/
+
+#include "ejs.h"
+
+#if BLD_FEATURE_EJS
+/******************************************************************************/
+/*********************************** Constructors *****************************/
+/******************************************************************************/
+/*
+ * String constructor.
+ */
+
+int ejsStringConstructor(Ejs *ejs, EjsVar *thisObj, int argc, EjsVar **argv)
+{
+ char *str;
+
+ if (argc == 0) {
+ ejsSetReturnValueToString(ejs, "");
+
+ } else if (argc == 1) {
+ /* MOB -- rc */
+ str = ejsVarToString(ejs, argv[0]);
+ ejsSetReturnValueToString(ejs, str);
+
+ } else {
+ ejsArgError(ejs, "usage: String([var])");
+ return -1;
+ }
+
+ return 0;
+}
+
+/******************************************************************************/
+/******************************** Visible Methods *****************************/
+/******************************************************************************/
+/*
+ * Return a string containing the character at a given index
+ *
+ * String string.charAt(Number)
+ */
+
+static int charAt(Ejs *ejs, EjsVar *thisObj, int argc, EjsVar **argv)
+{
+ EjsNum num;
+ char buf[2];
+
+ if (argc != 1) {
+ ejsArgError(ejs, "usage: charAt(integer)");
+ return -1;
+ }
+
+ num = ejsVarToNumber(argv[0]);
+ if (num < 0 || num >= thisObj->length) {
+ ejsError(ejs, EJS_RANGE_ERROR, "Bad index");
+ return -1;
+ }
+
+ mprAssert(ejsVarIsString(thisObj));
+
+ buf[0] = argv[0]->string[num];
+ buf[1] = '\0';
+ ejsSetReturnValueToString(ejs, buf);
+
+ return 0;
+}
+
+/******************************************************************************/
+/*
+ * Return an integer containing the character at a given index
+ *
+ * Number string.charCodeAt(Number)
+ */
+
+static EjsNum charCodeAt(Ejs *ejs, EjsVar *thisObj, int argc, EjsVar **argv)
+{
+ EjsNum num;
+
+ if (argc != 1) {
+ ejsArgError(ejs, "usage: charCodeAt(integer)");
+ return -1;
+ }
+
+ num = ejsVarToNumber(argv[0]);
+ if (num < 0 || num >= thisObj->length) {
+ ejsError(ejs, EJS_RANGE_ERROR, "Bad index");
+ return -1;
+ }
+ ejsSetReturnValueToNumber(ejs, (EjsNum) argv[0]->string[num]);
+
+ return 0;
+}
+
+/******************************************************************************/
+/*
+ * Catenate
+ *
+ * String string.catenate(var, ...)
+ */
+
+static int concat(Ejs *ejs, EjsVar *thisObj, int argc, EjsVar **argv)
+{
+ int i;
+
+ if (argc == 0) {
+ ejsArgError(ejs, "usage: concat(String, ...)");
+ return -1;
+ }
+
+ mprAssert(ejsVarIsString(thisObj));
+
+ for (i = 0; i < argc; i++) {
+ if (ejsStrcat(ejs, thisObj, argv[i]) < 0) {
+ ejsMemoryError(ejs);
+ return -1;
+ }
+ }
+ ejsSetReturnValue(ejs, thisObj);
+ return 0;
+}
+
+/******************************************************************************/
+/*
+ * Return the position of the first occurance of a substring
+ *
+ * Number string.indexOf(String subString [, Number start])
+ */
+
+static int indexOf(Ejs *ejs, EjsVar *thisObj, int argc, EjsVar **argv)
+{
+ char *pat, *s1, *s2, *origin;
+ int start, i;
+
+ if (argc == 0 || argc > 2) {
+ ejsArgError(ejs, "usage: indexOf(String [, Number])");
+ return -1;
+ }
+
+ pat = ejsVarToString(ejs, argv[0]);
+
+ if (argc == 2) {
+ start = ejsVarToNumber(argv[1]);
+ if (start > thisObj->length) {
+ start = thisObj->length;
+ }
+ } else {
+ start = 0;
+ }
+
+ i = start;
+ for (origin = &thisObj->string[i]; i < thisObj->length; i++, origin++) {
+ s1 = origin;
+ for (s2 = pat; *s1 && *s2; s1++, s2++) {
+ if (*s1 != *s2) {
+ break;
+ }
+ }
+ if (*s2 == '\0') {
+ ejsSetReturnValueToNumber(ejs, (EjsNum) (origin - thisObj->string));
+ }
+ }
+
+ ejsSetReturnValueToNumber(ejs, (EjsNum) -1);
+ return 0;
+}
+
+/******************************************************************************/
+/*
+ * Return the position of the last occurance of a substring
+ *
+ * Number string.lastIndexOf(String subString [, Number start])
+ */
+
+static int lastIndexOf(Ejs *ejs, EjsVar *thisObj, int argc, EjsVar **argv)
+{
+ char *pat, *s1, *s2, *origin;
+ int start;
+
+ if (argc == 0 || argc > 2) {
+ ejsArgError(ejs, "usage: indexOf(String [, Number])");
+ return -1;
+ }
+
+ pat = ejsVarToString(ejs, argv[0]);
+
+ if (argc == 2) {
+ start = ejsVarToNumber(argv[1]);
+ if (start > thisObj->length) {
+ start = thisObj->length;
+ }
+ } else {
+ start = 0;
+ }
+
+ origin = &thisObj->string[thisObj->length - 1];
+ for (; origin >= &thisObj->string[start]; origin--) {
+
+ s1 = origin;
+ for (s2 = pat; *s1 && *s2; s1++, s2++) {
+ if (*s1 != *s2) {
+ break;
+ }
+ }
+ if (*s2 == '\0') {
+ ejsSetReturnValueToNumber(ejs, (EjsNum) (origin - thisObj->string));
+ }
+ }
+
+ ejsSetReturnValueToNumber(ejs, (EjsNum) -1);
+ return 0;
+}
+
+/******************************************************************************/
+/*
+ * Return a substring
+ *
+ * Number string.slice(Number start, Number end)
+ */
+
+static int slice(Ejs *ejs, EjsVar *thisObj, int argc, EjsVar **argv)
+{
+ EjsNum start, end;
+
+ if (argc != 2) {
+ ejsArgError(ejs, "usage: slice(Number, Number)");
+ return -1;
+ }
+
+ start = ejsVarToNumber(argv[0]);
+ end = ejsVarToNumber(argv[1]);
+ if (start < 0 || start >= thisObj->length) {
+ ejsError(ejs, EJS_RANGE_ERROR, "Bad start index");
+ return-1;
+ }
+ if (end < 0 || end >= thisObj->length) {
+ ejsError(ejs, EJS_RANGE_ERROR, "Bad end index");
+ return -1;
+ }
+
+ mprAssert(ejsVarIsString(thisObj));
+
+ ejsSetReturnValueToBinaryString(ejs, (uchar*) &thisObj->string[start],
+ end - start);
+
+ return 0;
+}
+
+/******************************************************************************/
+/*
+ * Split a string
+ *
+ * Number string.split(String delimiter [, Number limit])
+ */
+
+static int split(Ejs *ejs, EjsVar *thisObj, int argc, EjsVar **argv)
+{
+ EjsVar *array, *vp;
+ char *delim, *last, *cp;
+ int len, limit, alloc;
+
+ if (argc == 0 || argc > 2) {
+ ejsArgError(ejs, "usage: split(String [, Number])");
+ return -1;
+ }
+
+ delim = ejsVarToStringEx(ejs, argv[0], &alloc);
+
+ limit = ejsVarToNumber(argv[1]);
+
+ array = ejsCreateArray(ejs, 0);
+
+ len = strlen(delim);
+
+ last = thisObj->string;
+ for (cp = last; *cp; cp++) {
+ if (*cp == *delim && strncmp(cp, delim, len) == 0) {
+ if (cp > last) {
+ vp = ejsCreateBinaryStringVar(ejs, (uchar*) last, (cp - last));
+ ejsAddArrayElt(ejs, array, vp, EJS_SHALLOW_COPY);
+ ejsFreeVar(ejs, vp);
+ }
+ }
+ }
+
+ ejsSetReturnValue(ejs, array);
+ ejsFreeVar(ejs, array);
+
+ if (alloc) {
+ mprFree(delim);
+ }
+
+ return 0;
+}
+
+/******************************************************************************/
+/*
+ * Create the object class
+ */
+
+int ejsDefineStringClass(Ejs *ejs)
+{
+ EjsVar *sc;
+
+ sc = ejsDefineClass(ejs, "String", "Object", ejsStringConstructor);
+ if (sc == 0) {
+ return MPR_ERR_CANT_INITIALIZE;
+ }
+
+ ejsDefineCMethod(ejs, sc, "charAt", charAt, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "charCodeAt", charCodeAt, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "concat", concat, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "indexOf", indexOf, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "lastIndexOf", lastIndexOf, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "slice", slice, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "split", split, EJS_NO_LOCAL);
+#if UNUSED
+ ejsDefineCMethod(ejs, sc, "match", match, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "replace", replace, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "search", search, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "substring", substring, EJS_NO_LOCAL);
+ // MOB bad name
+ ejsDefineCMethod(ejs, sc, "substr", substr, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "toLowerCase", toLowerCase, EJS_NO_LOCAL);
+ ejsDefineCMethod(ejs, sc, "toUpperCase", toUpperCase, EJS_NO_LOCAL);
+
+ // Static method
+ ejsDefineCMethod(ejs, sc, "fromCharCode", fromCharCode, 0, EJS_NO_LOCAL);
+#endif
+
+ if (ejsObjHasErrors(sc)) {
+ ejsFreeVar(ejs, sc);
+ return MPR_ERR_CANT_CREATE;
+ }
+ return 0;
+}
+
+/******************************************************************************/
+#endif /* BLD_FEATURE_EJS */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim:tw=78
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */