1 files changed, 140 insertions, 0 deletions
diff --git a/c/printer.c b/c/printer.c
new file mode 100644
index 0000000..0669cf6
--- /dev/null
+++ b/c/printer.c
@@ -0,0 +1,140 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include "types.h"
+#include "printer.h"
+
+char *_pr_str_hash_map(MalVal *obj, int print_readably) {
+    int start = 1;
+    char *repr = NULL, *repr_tmp1 = NULL, *repr_tmp2 = NULL;
+    GHashTableIter iter;
+    gpointer key, value;
+
+    repr = g_strdup_printf("{");
+
+    g_hash_table_iter_init (&iter, obj->val.hash_table);
+    while (g_hash_table_iter_next (&iter, &key, &value)) {
+        //g_print ("%s/%p ", (const char *) key, (void *) value);
+
+        repr_tmp1 = _pr_str((MalVal*)value, print_readably);
+        if (start) {
+            start = 0;
+            repr = g_strdup_printf("{\"%s\" %s", (char *)key, repr_tmp1);
+        } else {
+            repr_tmp2 = repr;
+            repr = g_strdup_printf("%s \"%s\" %s", repr_tmp2, (char *)key, repr_tmp1);
+            free(repr_tmp2);
+        }
+        free(repr_tmp1);
+    }
+    repr_tmp2 = repr;
+    repr = g_strdup_printf("%s}", repr_tmp2);
+    free(repr_tmp2);
+    return repr;
+}
+
+char *_pr_str_list(MalVal *obj, int print_readably, char start, char end) {
+    int i;
+    char *repr = NULL, *repr_tmp1 = NULL, *repr_tmp2 = NULL;
+    repr = g_strdup_printf("%c", start);
+    for (i=0; i<_count(obj); i++) {
+        repr_tmp1 = _pr_str(g_array_index(obj->val.array, MalVal*, i),
+                            print_readably);
+        if (i == 0) {
+            repr = g_strdup_printf("%c%s", start, repr_tmp1);
+        } else {
+            repr_tmp2 = repr;
+            repr = g_strdup_printf("%s %s", repr_tmp2, repr_tmp1);
+            free(repr_tmp2);
+        }
+        free(repr_tmp1);
+    }
+    repr_tmp2 = repr;
+    repr = g_strdup_printf("%s%c", repr_tmp2, end);
+    free(repr_tmp2);
+    return repr;
+}
+
+// Return a string representation of the MalVal object. Returned string must
+// be freed by caller.
+char *_pr_str(MalVal *obj, int print_readably) {
+    char *repr = NULL;
+    if (obj == NULL) { return NULL; }
+    switch (obj->type) {
+    case MAL_NIL:
+        repr = g_strdup_printf("nil");
+        break;
+    case MAL_TRUE:
+        repr = g_strdup_printf("true");
+        break;
+    case MAL_FALSE:
+        repr = g_strdup_printf("false");
+        break;
+    case MAL_STRING:
+        if (print_readably) {
+            char *repr_tmp = g_strescape(obj->val.string, "");
+            repr = g_strdup_printf("\"%s\"", repr_tmp);
+            free(repr_tmp);
+        } else {
+            repr = g_strdup_printf("%s", obj->val.string);
+        }
+        break;
+    case MAL_SYMBOL:
+        repr = g_strdup_printf("%s", obj->val.string);
+        break;
+    case MAL_INTEGER:
+        repr = g_strdup_printf("%" G_GINT64_FORMAT, obj->val.intnum);
+        break;
+    case MAL_FLOAT:
+        repr = g_strdup_printf("%f", obj->val.floatnum);
+        break;
+    case MAL_HASH_MAP:
+        repr = _pr_str_hash_map(obj, print_readably);
+        break;
+    case MAL_LIST:
+        repr = _pr_str_list(obj, print_readably, '(', ')');
+        break;
+    case MAL_VECTOR:
+        repr = _pr_str_list(obj, print_readably, '[', ']');
+        break;
+    case MAL_ATOM:
+        repr = g_strdup_printf("(atom %s)",
+                               _pr_str(obj->val.atom_val, print_readably));
+        break;
+    case MAL_FUNCTION_C:
+        repr = g_strdup_printf("#<function@%p>", obj->val.f0);
+        break;
+    case MAL_FUNCTION_MAL:
+        repr = g_strdup_printf("#<Function: (fn* %s %s)>",
+                                _pr_str(obj->val.func.args, print_readably),
+                                _pr_str(obj->val.func.body, print_readably));
+        break;
+    default:
+        printf("pr_str unknown type %d\n", obj->type);
+        repr = g_strdup_printf("<unknown>");
+    }
+    return repr;
+}
+
+// Return a string representation of the MalVal arguments. Returned string must
+// be freed by caller.
+char *_pr_str_args(MalVal *args, char *sep, int print_readably) {
+    assert_type(args, MAL_LIST|MAL_VECTOR,
+                "_pr_str called with non-sequential args");
+    int i;
+    char *repr = g_strdup_printf(""),
+         *repr2 = NULL;
+    for (i=0; i<_count(args); i++) {
+        MalVal *obj = g_array_index(args->val.array, MalVal*, i);
+        if (i != 0) {
+            repr2 = repr;
+            repr = g_strdup_printf("%s%s", repr2, sep);
+            free(repr2);
+        }
+        repr2 = repr;
+        repr = g_strdup_printf("%s%s",
+                               repr2, _pr_str(obj, print_readably));
+        free(repr2);
+    }
+    return repr;
+}
+