start on some simple exact matching

src/jairee.c

@@ -5,14 +5,26 @@
 #define NODE_TYPE_ACCEPT_ONE    0u
 #define NODE_TYPE_ACCEPT_RANGE  1u
 
-typedef struct {
-    jairee_cp_t cp1;
-    jairee_cp_t cp2;
-    size_t type;
-} node_t;
-
 bool jairee_compile_add_cp(jairee_re_t * re, jairee_cp_t cp)
 {
+    node_t * node = (node_t *)malloc(sizeof(node_t));
+    node->next = NULL;
+    node->cp1 = cp;
+    node->type = NODE_TYPE_ACCEPT_ONE;
+    if (re->nodes == NULL)
+    {
+        re->nodes = node;
+    }
+    else
+    {
+        node_t * current = re->nodes;
+        while (current->next != NULL)
+        {
+            current = current->next;
+        }
+        current->next = node;
+    }
+    return true;
 }
 
 jairee_re_t * jairee_compile(jairee_string_t * rs)
@@ -43,6 +55,37 @@ void jairee_re_free(jairee_re_t * re)
     free(re);
 }
 
+jairee_match_t * jairee_matchc(jairee_string_t * str, size_t start_offset, jairee_re_t * re)
+{
+    if ((re->error != 0u) || (re->nodes == NULL))
+    {
+        return NULL;
+    }
+    node_t * node = re->nodes;
+    size_t offset = start_offset;
+    while (node != NULL)
+    {
+        if (offset >= str->len)
+        {
+            return NULL;
+        }
+        jairee_cp_t cp = str->decode(str->str, &offset);
+        if (cp == JAIREE_DECODE_ERROR)
+        {
+            return NULL;
+        }
+        if (cp == node->cp1)
+        {
+            node = node->next;
+        }
+    }
+    jairee_match_t * match = (jairee_match_t *)malloc(sizeof(jairee_match_t));
+    match->start = start_offset;
+    match->end = offset;
+    match->next = NULL;
+    return match;
+}
+
 static jairee_cp_t decode_ascii(const void * s, size_t * offset)
 {
     jairee_cp_t cp = (jairee_cp_t)((const char *)s)[*offset];

src/jairee.h

@@ -25,7 +25,15 @@ typedef struct {
     jairee_decode_t decode;
 } jairee_string_t;
 
+typedef struct node_s {
+    struct node_s * next;
+    jairee_cp_t cp1;
+    jairee_cp_t cp2;
+    size_t type;
+} node_t;
+
 typedef struct {
+    node_t * nodes;
     size_t error;
 } jairee_re_t;
 
@@ -37,11 +45,11 @@ jairee_re_t * jairee_compile(jairee_string_t * exp);
 
 void jairee_re_free(jairee_re_t * re);
 
+jairee_match_t * jairee_matchc(jairee_string_t * str, size_t start_offset, jairee_re_t * re);
+
 #if 0
 jairee_match_t * jairee_match(jairee_string_t * str, size_t start_offset, jairee_string_t * exp);
 
-jairee_match_t * jairee_matchc(jairee_string_t * str, size_t start_offset, jairee_re_t * re);
-
 jairee_state_t * jairee_start(jairee_string_t * str, size_t start_offset, jairee_string_t * exp, jairee_match_t ** match);
 
 jairee_state_t * jairee_startc(jairee_string_t * str, size_t start_offset, jairee_re_t * re, jairee_match_t ** match);