feat: working parser for rc shell language

1 files changed, 40 insertions, 0 deletions

diff --git a/sys/cmd/rc/util.c b/sys/cmd/rc/util.c
new file mode 100644
index 0000000..02b3611
--- /dev/null
+++ b/sys/cmd/rc/util.c
@@ -0,0 +1,40 @@
+#include "rc.h"
+
+void *
+emalloc(uintptr n)
+{
+    void *p = malloc(n);
+    if (!p)
+        panic("can't malloc %d bytes", n);
+
+    return p;
+}
+
+void *
+erealloc(void *p, uintptr n)
+{
+    void *new = realloc(p, n);
+    if (!new)
+        panic("can't realloc %d bytes", n);
+
+    return new;
+}
+
+void
+efree(void *p)
+{
+    if (p)
+        free(p);
+    else
+        pfmt(errio, "free <nil>\n");
+}
+
+void
+panic(char *s, int n)
+{
+    pfmt(errio, "rc: ");
+    pfmt(errio, s, n);
+    pchr(errio, '\n');
+    flush(&errio);
+    abort();
+}