src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/regexp/joni/StackEntry.java

/*
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package jdk.nashorn.internal.runtime.regexp.joni;

final class StackEntry {
    int type;
    private int E1, E2, E3, E4;

    // first union member
    /* byte code position */
    void setStatePCode(final int pcode) {
        E1 = pcode;
    }
    int getStatePCode() {
        return E1;
    }
    /* string position */
    void setStatePStr(final int pstr) {
        E2 = pstr;
    }
    int getStatePStr() {
        return E2;
    }
    /* previous char position of pstr */
    void setStatePStrPrev(final int pstrPrev) {
        E3 = pstrPrev;
    }
    int getStatePStrPrev() {
        return E3;
    }

    void setStateCheck(final int check) {
        E4 = check;
    }
    int getStateCheck() {
        return E4;
    }

    // second union member
    /* for OP_REPEAT_INC, OP_REPEAT_INC_NG */
    void setRepeatCount(final int count) {
        E1 = count;
    }
    int getRepeatCount() {
        return E1;
    }
    void decreaseRepeatCount() {
        E1--;
    }
    void increaseRepeatCount() {
        E1++;
    }
    /* byte code position (head of repeated target) */
    void setRepeatPCode(final int pcode) {
        E2 = pcode;
    }
    int getRepeatPCode() {
        return E2;
    }
    /* repeat id */
    void setRepeatNum(final int num) {
        E3 = num;
    }
    int getRepeatNum() {
        return E3;
    }

    // third union member
    /* index of stack */ /*int repeat_inc struct*/
    void setSi(final int si) {
        E1 = si;
    }
    int getSi() {
        return E1;
    }

    // fourth union member
    /* memory num */
    void setMemNum(final int num) {
        E1 = num;
    }
    int getMemNum() {
        return E1;
    }
    /* start/end position */
    void setMemPstr(final int pstr) {
        E2 = pstr;
    }
    int getMemPStr() {
        return E2;
    }

    /* Following information is set, if this stack type is MEM-START */
    /* prev. info (for backtrack  "(...)*" ) */
    void setMemStart(final int start) {
        E3 = start;
    }
    int getMemStart() {
        return E3;
    }
    /* prev. info (for backtrack  "(...)*" ) */
    void setMemEnd(final int end) {
        E4 = end;
    }
    int getMemEnd() {
        return E4;
    }

    // fifth union member
    /* null check id */
    void setNullCheckNum(final int num) {
        E1 = num;
    }
    int getNullCheckNum() {
        return E1;
    }
    /* start position */
    void setNullCheckPStr(final int pstr) {
        E2 = pstr;
    }
    int getNullCheckPStr() {
        return E2;
    }

    // sixth union member
    /* byte code position */
    void setCallFrameRetAddr(final int addr) {
        E1 = addr;
    }
    int getCallFrameRetAddr() {
        return E1;
    }
    /* null check id */
    void setCallFrameNum(final int num) {
        E2 = num;
    }
    int getCallFrameNum() {
        return E2;
    }
    /* string position */
    void setCallFramePStr(final int pstr) {
        E3 = pstr;
    }
    int getCallFramePStr() {
        return E3;
    }
}