Move everything around - delete old Haskell code, clean up build.

jv.h

@@ -0,0 +1,206 @@
+#ifndef JV_H
+#define JV_H
+
+#include <stdint.h>
+#include <assert.h>
+#include <stddef.h>
+
+
+
+typedef enum {
+  JV_KIND_INVALID,
+  JV_KIND_NULL,
+  JV_KIND_FALSE,
+  JV_KIND_TRUE,
+  JV_KIND_NUMBER,
+  JV_KIND_STRING,
+  JV_KIND_ARRAY,
+  JV_KIND_OBJECT
+} jv_kind;
+
+typedef struct {
+  size_t count;
+} jv_refcnt;
+
+typedef struct{
+  jv_refcnt* ptr;
+  int i[2];
+} jv_complex;
+
+typedef struct {
+  jv_kind kind;
+  union {
+    double number;
+    jv_complex complex;
+  } val;
+} jv;
+
+/*
+ * All jv_* functions consume (decref) input and produce (incref) output
+ * Except jv_copy
+ */
+
+jv_kind jv_get_kind(jv);
+const char* jv_kind_name(jv_kind);
+static int jv_is_valid(jv x) { return jv_get_kind(x) != JV_KIND_INVALID; }
+
+jv jv_copy(jv);
+void jv_free(jv);
+
+int jv_equal(jv, jv);
+
+jv jv_invalid();
+jv jv_invalid_with_msg(jv);
+jv jv_invalid_get_msg(jv);
+int jv_invalid_has_msg(jv);
+
+
+jv jv_null();
+jv jv_true();
+jv jv_false();
+jv jv_bool(int);
+
+jv jv_number(double);
+double jv_number_value(jv);
+
+jv jv_array();
+jv jv_array_sized(int);
+int jv_array_length(jv);
+jv jv_array_get(jv, int);
+jv jv_array_set(jv, int, jv);
+jv jv_array_append(jv, jv);
+jv jv_array_concat(jv, jv);
+jv jv_array_slice(jv, int, int);
+
+
+jv jv_string(const char*);
+jv jv_string_sized(const char*, int);
+int jv_string_length(jv);
+uint32_t jv_string_hash(jv);
+const char* jv_string_value(jv);
+jv jv_string_concat(jv, jv);
+jv jv_string_fmt(const char*, ...);
+jv jv_string_append_buf(jv a, const char* buf, int len);
+jv jv_string_append_str(jv a, const char* str);
+
+jv jv_object();
+jv jv_object_get(jv object, jv key);
+jv jv_object_set(jv object, jv key, jv value);
+jv jv_object_delete(jv object, jv key);
+int jv_object_length(jv object);
+jv jv_object_merge(jv, jv);
+
+int jv_object_iter(jv);
+int jv_object_iter_next(jv, int);
+int jv_object_iter_valid(jv, int);
+jv jv_object_iter_key(jv, int);
+jv jv_object_iter_value(jv, int);
+#define jv_object_foreach(i,t) \
+  for (int i = jv_object_iter(t);               \
+       jv_object_iter_valid(t, i);              \
+       i = jv_object_iter_next(t, i))           \
+ 
+
+
+int jv_get_refcnt(jv);
+
+enum { JV_PRINT_PRETTY = 1, JV_PRINT_ASCII = 2 };
+void jv_dump(jv, int flags);
+jv jv_dump_string(jv, int flags);
+
+jv jv_parse(const char* string);
+jv jv_parse_sized(const char* string, int length);
+
+
+static jv jv_lookup(jv t, jv k) {
+  jv v;
+  if (jv_get_kind(t) == JV_KIND_OBJECT && jv_get_kind(k) == JV_KIND_STRING) {
+    v = jv_object_get(t, k);
+    if (!jv_is_valid(v)) {
+      jv_free(v);
+      v = jv_null();
+    }
+  } else if (jv_get_kind(t) == JV_KIND_ARRAY && jv_get_kind(k) == JV_KIND_NUMBER) {
+    // FIXME: don't do lookup for noninteger index
+    v = jv_array_get(t, (int)jv_number_value(k));
+    if (!jv_is_valid(v)) {
+      jv_free(v);
+      v = jv_null();
+    }
+  } else if (jv_get_kind(t) == JV_KIND_NULL && 
+             (jv_get_kind(k) == JV_KIND_STRING || jv_get_kind(k) == JV_KIND_NUMBER)) {
+    jv_free(t);
+    jv_free(k);
+    v = jv_null();
+  } else {
+    v = jv_invalid_with_msg(jv_string_fmt("Cannot index %s with %s",
+                                          jv_kind_name(jv_get_kind(t)),
+                                          jv_kind_name(jv_get_kind(k))));
+    jv_free(t);
+    jv_free(k);
+  }
+  return v;
+}
+
+static jv jv_modify(jv t, jv k, jv v) {
+  int isnull = jv_get_kind(t) == JV_KIND_NULL;
+  if (jv_get_kind(k) == JV_KIND_STRING && 
+      (jv_get_kind(t) == JV_KIND_OBJECT || isnull)) {
+    if (isnull) t = jv_object();
+    t = jv_object_set(t, k, v);
+  } else if (jv_get_kind(k) == JV_KIND_NUMBER &&
+             (jv_get_kind(t) == JV_KIND_ARRAY || isnull)) {
+    if (isnull) t = jv_array();
+    t = jv_array_set(t, (int)jv_number_value(k), v);
+  } else {
+    jv err = jv_invalid_with_msg(jv_string_fmt("Cannot update field at %s index of %s",
+                                               jv_kind_name(jv_get_kind(t)),
+                                               jv_kind_name(jv_get_kind(v))));
+    jv_free(t);
+    jv_free(k);
+    jv_free(v);
+    t = err;
+  }
+  return t;
+}
+
+static jv jv_insert(jv root, jv value, jv* path, int pathlen) {
+  if (pathlen == 0) {
+    jv_free(root);
+    return value;
+  }
+  return jv_modify(root, jv_copy(*path), 
+                   jv_insert(jv_lookup(jv_copy(root), jv_copy(*path)), value, path+1, pathlen-1));
+}
+
+
+
+
+
+
+
+
+
+#endif
+
+
+/*
+
+true/false/null:
+check kind
+
+number:
+introduce/eliminate jv
+to integer
+
+array:
+copy
+free
+slice
+index
+update
+
+updateslice?
+
+
+ */