From c8ef4cf86bb97033238e3aa5c95789ea665341b1 Mon Sep 17 00:00:00 2001
From: Matthew Sotoudeh <matthew@masot.net>
Date: Sun, 30 Jul 2023 21:16:09 -0700
Subject: C dynamic typing pass works as well

---
 c/libdietc.l | 59 +++++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 41 insertions(+), 18 deletions(-)

(limited to 'c/libdietc.l')

diff --git a/c/libdietc.l b/c/libdietc.l
index cd167b2..7133803 100644
--- a/c/libdietc.l
+++ b/c/libdietc.l
@@ -21,17 +21,20 @@ static void end_function();
 ^[#].*$ {}
 "typedef Type_"[0-9]*" * Type_"[0-9]*" ;" { declare_pointer(yytext); }
 "typedef Type_"[0-9]*" Type_"[0-9]*" [ "[^ ]*" ] ;" { declare_array(yytext); }
-"typedef Type_"[0-9]*" ( "[^)\n]*") ;" { declare_function(yytext); }
+"typedef Type_"[0-9]*" Type_"[0-9]*" ( "[^)\n]*") ;" { declare_function(yytext); }
 "typedef struct Struct_"[0-9]*" Type_"[0-9]*" ;" { predeclare_struct(yytext); }
 "struct Struct_"[0-9]*" { "[^}\n]*"} ;"  { define_aggregate(yytext); }
 "typedef union Union_"[0-9]*" Type_"[0-9]*" ;" { predeclare_union(yytext); }
 "union Union_"[0-9]*" { "[^}\n]*"} ;"  { define_aggregate(yytext); }
-"typedef ".*" ;" { declare_basic(yytext); }
+"typedef "[^*\n\t(]*" ;" { declare_basic(yytext); }
 "extern Type_"[0-9]*" "[^ \n]*" ;" { declare_object(yytext); }
 "static Type_"[0-9]*" "[^ \n]*" ;" { declare_object(yytext); }
 ^[^=\n\t]*"= ".*$ { /* definition */ }
 ^[^{\n]*"{"$ { start_function(yytext); }
-\tType_[0-9]*" "[a-zA-Z0-9_]*" ;" { declare_object(yytext); add_instruction(yytext); }
+^\tType_[0-9]*" "[a-zA-Z0-9_]*" ;"$ {
+        declare_object(yytext);
+        add_instruction(yytext);
+    }
 \t[^\n]*$ { add_instruction(yytext); }
 "}"$ { end_function(); }
 \n { }
@@ -124,7 +127,7 @@ static void define_aggregate(char *line) {
         *insert_at = field_type;
         insert_at = &(field_type->next_member);
 
-        line = strchrnul(strchrnul(line, ','), 'T');
+        line = strchrnul(strchrnul(line, ';'), 'T');
     }
     *insert_at = 0;
 }
@@ -132,11 +135,12 @@ static void define_aggregate(char *line) {
 static void declare_basic(char *line) {
     char *basic = strdup(line + strlen("typedef "));
     char *basic_end = basic;
-    while (strncmp(basic_end + 1, "Type_", strlen(basic_end))) basic_end++;
+    while (strncmp(basic_end, "Type_", strlen("Type_"))) basic_end++;
+    basic_end--;
     // now basic_end is the space right before Type_
     *basic_end = '\0';
-    line += (basic_end - basic);
-    struct type type = {strdup(line), TYPE_BASIC, next_number(&line), 0};
+    char *type_name = line + (basic_end - basic);
+    struct type type = {strdup(line), TYPE_BASIC, next_number(&type_name), 0};
     type.basic = basic;
     add_type(type);
 }
@@ -152,30 +156,31 @@ static unsigned long hash(char *str) { // djb2
 }
 
 // ... Type_# name ;
-static void declare_object(char *line) {
+static void insert_object(struct object *object) {
     // MAYBE REHASH
     if (PROGRAM.n_objects >= PROGRAM.cap_objects / 2) {
         unsigned long old_cap = PROGRAM.cap_objects;
         struct object **old_objects = PROGRAM.objects;
         PROGRAM.cap_objects = 4 * (PROGRAM.n_objects + 1);
         PROGRAM.objects = calloc(PROGRAM.cap_objects, sizeof(void*));
-        for (unsigned long i = 0; i < old_cap; i++) {
-            if (!old_objects[i]) continue;
-            unsigned long h = hash(old_objects[i]->name) % old_cap;
-            while (PROGRAM.objects[h]) h = (h + 1) % old_cap;
-            PROGRAM.objects[h] = old_objects[i];
-        }
+        for (unsigned long i = 0; i < old_cap; i++)
+            if (old_objects[i])
+                insert_object(old_objects[i]);
         free(old_objects);
     }
     // INSERT
-    struct object *object = malloc(sizeof(*object));
-    object->type = PROGRAM.id2type[next_number(&line)];
-    object->name = libdietc_tokdup(line + 1);
     PROGRAM.n_objects++;
     unsigned long h = hash(object->name) % PROGRAM.cap_objects;
-    while (PROGRAM.objects[h]) h = (h + 1) % PROGRAM.cap_objects;
+    while (PROGRAM.objects[h])
+        h = ((h + 1) % PROGRAM.cap_objects);
     PROGRAM.objects[h] = object;
 }
+static void declare_object(char *line) {
+    struct object *object = calloc(1, sizeof(object));
+    object->type = PROGRAM.id2type[next_number(&line)];
+    object->name = libdietc_tokdup(line + 1);
+    insert_object(object);
+}
 
 static void start_function(char *line) {
     FUNCTION = (struct function){0};
@@ -241,3 +246,21 @@ void libdietc_print(struct program program) {
         printf("}\n");
     }
 }
+
+char *libdietc_nth_token(char *string, int n) {
+    while (isspace(*string)) string++;
+    for (int i = 0; i < n; i++) {
+        while (!isspace(*string)) string++;
+        while (isspace(*string)) string++;
+    }
+    return string;
+}
+
+struct type *libdietc_object_type(struct program program, char *name) {
+    char *name_tok = libdietc_tokdup(name);
+    unsigned long h = hash(name_tok) % program.cap_objects;
+    while (program.objects[h] && strcmp(program.objects[h]->name, name))
+        h = (h + 1) % program.cap_objects;
+    free(name_tok);
+    return program.objects[h] ? program.objects[h]->type : 0;
+}
-- 
cgit v1.2.3