1 files changed, 69 insertions, 0 deletions
diff --git a/tmp.c b/tmp.c
new file mode 100644
index 0000000..c93443f
--- /dev/null
+++ b/tmp.c
@@ -0,0 +1,69 @@
+#include "tmp.h"
+#include "type.h"
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+const struct stentry *tmp_create(struct fn *fn, const struct type *t)
+{
+    static const char fmt[] = "__tmp%zu";
+    int r = snprintf(NULL, 0, fmt, fn->ntmps);
+    char *s = NULL, *tname = NULL;
+    struct tmp *tmp;
+
+    if (!(tname = type_name(t)))
+        goto failure;
+    else if (r < 0)
+    {
+        fprintf(stderr, "%s: snprintf(3) failed\n", __func__);
+        goto failure;
+    }
+    else if (!(s = malloc(r + 1)))
+    {
+        perror("malloc(3)");
+        goto failure;
+    }
+
+    snprintf(s, r + 1, fmt, fn->ntmps++);
+
+    if (!(tmp = malloc(sizeof *tmp)))
+    {
+        perror("realloc(3)");
+        goto failure;
+    }
+
+    *tmp = (struct tmp)
+    {
+        .tk =
+        {
+            .type = ID,
+            .s = s,
+            .loc.f = "(temporary)"
+        },
+
+        .e =
+        {
+            .tk = &tmp->tk,
+            .t = t
+        }
+    };
+
+    if (!fn->tmps)
+        fn->tmps = tmp;
+    else
+        for (struct tmp *t = fn->tmps; t ; t = t->next)
+            if (!t->next)
+            {
+                t->next = tmp;
+                break;
+            }
+
+    fprintf(stderr, "\tcreating temporary variable %s, type %s\n", s, tname);
+    free(tname);
+    return &tmp->e;
+
+failure:
+    free(s);
+    free(tname);
+    return NULL;
+}