parser

(bzr r5991)

1 files changed, 394 insertions, 0 deletions

diff --git a/src/dom/work/Idlp.java b/src/dom/work/Idlp.java
new file mode 100644
index 000000000..2f45cf175
--- /dev/null
+++ b/src/dom/work/Idlp.java
@@ -0,0 +1,394 @@
+import java.io.*;
+import java.util.*;
+
+
+public class Idlp
+{
+String parsebuf;
+int len;
+
+
+void error(String msg)
+{
+    System.out.println("Idlp err : " + msg);
+}
+
+void trace(String msg)
+{
+    System.out.println("Idlp : " + msg);
+}
+
+
+
+
+
+
+int get(int pos)
+{
+    if (pos<0 || pos>=len)
+        return -1;
+    else
+        return (int) parsebuf.charAt(pos);
+}
+
+
+int skipwhite(int pos)
+{
+    trace("skipwhite()");
+    while (pos < len)
+        {
+        int ch = get(pos);
+        if (ch == '/' && get(pos + 1) == '/')
+            {
+            pos += 2;
+            while (pos < len)
+                {
+                ch = get(pos);
+                if (ch == '\n' || ch == '\r')
+                    break;
+                pos++;
+                }
+            }
+        else if (!Character.isWhitespace(ch))
+            {
+            break;
+            }
+        pos++;
+        }
+    return pos;
+}
+
+boolean match(String key)
+{
+    trace("match(" + key + ")");
+    int p = 0;
+    for (int i=0 ; i<key.length() ; i++)
+        {
+        if (get(p) != key.charAt(i))
+            return false;
+        p++;
+        }
+    return true;
+        
+}
+
+String word = "";
+
+int getword(int pos)
+{
+    trace("getword()");
+    StringBuffer buf = new StringBuffer();
+    while (pos < len)
+        {
+        int ch = get(pos);
+        if (ch < 0)
+            break;
+        if (!Character.isLetterOrDigit(ch) && ch != '#' && ch != '_')
+            break;
+        buf.append((char)ch);
+        pos++;
+        }
+    word = buf.toString();
+    return pos;
+}
+
+int getDirective(String name, int pos)
+{
+    trace("getDirective()");
+    if (name.length() == 0 || name.charAt(0) != '#')
+        return -1;
+    while (pos < len)
+        {
+        int ch = get(pos);
+        if (ch == '\n' || ch == '\r')
+            break;
+        pos++;
+        }
+    return pos;
+}
+
+int getTypedef(int pos)
+{
+    trace("getTypedef()");
+    while (pos < len)
+        {
+        int ch = get(pos++);
+        if (ch == ';')
+            break;
+        }
+    return pos;
+}
+
+
+int getInterface(int pos)
+{
+    trace("getInterface()");
+    pos = skipwhite(pos);
+    int p = getword(pos);
+    if (p < 0)
+        return -1;
+    if (p <= pos)
+        {
+        error("expected interface name");
+        return -1;
+        }
+    String intfName = word;
+    trace("intf: " + intfName);
+    pos = p;
+    pos = skipwhite(pos);
+    int ch = get(pos);
+    if (ch == ';')
+        {
+        pos++; //forward decl
+        trace("forward decl");
+        return pos;
+        }
+    if (ch != '{')
+        {
+        error("Expected opening { for interface");
+        return -1;
+        }
+    pos++;
+    while (true)
+        {
+        pos = skipwhite(pos);
+        ch = get(pos);
+        if (ch == '}')
+            {
+            break;
+            }
+        p = getword(pos);
+        if (p < 0)
+            {
+            return -1;
+            }
+        if (p<=pos)
+            {
+            error("expected word");
+            return -1;
+            }
+        trace("word : " + word);
+        if (word.equals("typedef"))
+            {
+            pos = p;
+            p = getTypedef(pos);
+            if (p < 0)
+                return -1;
+            }
+        pos = p;
+        }
+
+    return pos;
+}
+
+
+int getException(int pos)
+{
+    trace("getException()");
+    pos = skipwhite(pos);
+    int p = getword(pos);
+    if (p < 0)
+        return -1;
+    if (p <= pos)
+        {
+        error("expected exception name");
+        return -1;
+        }
+    String exName = word;
+    trace("ex: " + exName);
+    pos = p;
+    pos = skipwhite(pos);
+    int ch = get(pos);
+    if (ch == ';')
+        {
+        pos++; //forward decl
+        trace("forward decl");
+        return pos;
+        }
+    if (ch != '{')
+        {
+        error("Expected opening { for exception");
+        return -1;
+        }
+    pos++;
+    while (pos < len)
+        {
+        ch = get(pos++);
+        if (ch == '}')
+            {
+            break;
+            }
+        }
+    pos = skipwhite(pos);
+    ch = get(pos);
+    if (ch != ';')
+        {
+        error("expected ; for exception");
+        return -1;
+        }
+    pos++;
+    return pos;
+}
+
+
+
+int getModule(int pos)
+{
+    trace("getModule()");
+    pos = skipwhite(pos);
+    int p = getword(pos);
+    if (p < 0)
+        return -1;
+    if (p <= pos)
+        {
+        error("expected module name");
+        return -1;
+        }
+    String modName = word;
+    trace("mod: " + modName);
+    pos = p;
+    pos = skipwhite(pos);
+    int ch = get(pos);
+    if (ch != '{')
+        {
+        error("Expected opening { for module");
+        return -1;
+        }
+    pos++;
+    while (true)
+        {
+        pos = skipwhite(pos);
+        ch = get(pos);
+        if (ch == '}')
+            {
+            break;
+            }
+        p = getword(pos);
+        if (p < 0)
+            {
+            return -1;
+            }
+        if (p<=pos)
+            {
+            error("expected word");
+            return -1;
+            }
+        trace("word : " + word);
+        if (word.equals("typedef"))
+            {
+            pos = p;
+            p = getTypedef(pos);
+            if (p < 0)
+                return -1;
+            }
+        else if (word.equals("interface"))
+            {
+            pos = p;
+            p = getInterface(pos);
+            if (p < 0)
+                return -1;
+            }
+        else if (word.equals("exception"))
+            {
+            pos = p;
+            p = getException(pos);
+            if (p < 0)
+                return -1;
+            }
+        else if (word.equals("module"))
+            {
+            pos = p;
+            p = getModule(pos);
+            if (p < 0)
+                return -1;
+            }
+        pos = p;
+        }
+
+    return pos;
+}
+
+boolean parse()
+{
+    trace("parse()");
+    len = parsebuf.length();
+    int pos = 0;
+    while (pos < len)
+        {
+        pos = skipwhite(pos);
+        if (pos >= len)
+            break;
+        int ch = get(pos);
+        int p = getword(pos);
+        if (p < 0)
+            return false;
+        if (p<=pos)
+            {
+            error("expected word");
+            return false;
+            }
+        trace("word: " + word);
+        if (word.length() == 0)
+            break;
+        if (word.charAt(0) == '#')
+            {
+            p = getDirective(word, pos);
+            if (p < 0)
+                return false;
+            }
+        else if (word.equals("module"))
+            {
+            pos = p;
+            p = getModule(pos);
+            if (p<0)
+                return false;
+            }
+        pos = p;
+        }
+
+    return true;
+}
+
+
+boolean run()
+{
+    parsebuf = "";
+    boolean ret = true;
+    try
+        {
+        StringBuffer inbuf = new StringBuffer();
+        FileReader in = new FileReader("svg.idl");
+        while (true)
+            {
+            int ch = in.read();
+            if (ch < 0)
+                break;
+            inbuf.append((char)ch);
+            }
+        in.close();
+        parsebuf = inbuf.toString();
+        ret = parse();
+        }
+    catch (IOException e)
+        {
+        error("run : " + e);
+        return false;
+        }
+    return ret;
+}
+
+
+public Idlp()
+{
+}
+
+
+public static void main(String argv[])
+{
+    Idlp idlp = new Idlp();
+    idlp.run();
+}
+
+
+
+}