np: parse: Add initial parsing logic

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 85 insertions, 1 deletions

diff --git a/src/sys/np/core/np_init.c b/src/sys/np/core/np_init.c
index 6b50b8e..63d2ff2 100644
--- a/src/sys/np/core/np_init.c
+++ b/src/sys/np/core/np_init.c
@@ -32,6 +32,7 @@
 #include <sys/syslog.h>
 #include <os/omar.h>
 #include <os/np.h>
+#include <np/parse.h>
 
 #define pr_trace(fmt, ...) printf("pirho: " fmt, ##__VA_ARGS__)
 
@@ -40,7 +41,6 @@ np_init(const char *in_path, struct np_work *workp)
 {
     int error;
     struct nameidata nd;
-    struct lex_token tok;
 
     if (in_path == NULL || workp == NULL) {
         return -EINVAL;
@@ -61,6 +61,7 @@ np_init(const char *in_path, struct np_work *workp)
         return error;
     }
 
+    parse_work(workp);
     return 0;
 }
 
diff --git a/src/sys/np/core/np_parse.c b/src/sys/np/core/np_parse.c
new file mode 100644
index 0000000..fe4dc1c
--- /dev/null
+++ b/src/sys/np/core/np_parse.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/syslog.h>
+#include <sys/param.h>
+#include <np/lex.h>
+#include <np/parse.h>
+#include <os/np.h>
+
+#define pr_trace(fmt, ...) printf("pirho.parse: " fmt, ##__VA_ARGS__)
+#define pr_error(fmt, ...) printf("pirho.parse: error: " fmt, ##__VA_ARGS__)
+
+/* Token to string conversion table */
+static const char *stoktab[] = {
+    /* Symbols */
+    [TT_LPAREN] = "<TT_LPAREN>",
+    [TT_RPAREN] = "<TT_RPAREN>",
+    [TT_IDENT]  = "<IDENTIFIER>",
+    [TT_COMMA]  = "<TT_COMMA>",
+
+    /* Types */
+    [TT_U8]     = "<TT_U8>",
+
+    /* Keywords */
+    [TT_BEGIN]  = "<TT_BEGIN>",
+    [TT_PROC]   = "<TT_PROC>",
+    [TT_END]    = "<TT_END>"
+};
+
+int
+parse_work(struct np_work *work)
+{
+    struct lex_token tok;
+    int error = 0;
+
+    if (work == NULL) {
+        pr_error("bad work argument\n");
+        return -EINVAL;
+    }
+
+    while (error == 0) {
+        error = lex_nom(work, &tok);
+        if (error < 0) {
+            return error;
+        }
+
+        if (tok.token > NELEM(stoktab)) {
+            pr_error("bad token %d\n", tok.token);
+            return -1;
+        }
+        printf("tok.type: %s\n", stoktab[tok.token]);
+    }
+
+    return 0;
+}