1 files changed, 10 insertions, 0 deletions
diff --git a/nss/cgen.h b/nss/cgen.h
new file mode 100644
index 0000000..cd5a275
--- /dev/null
+++ b/nss/cgen.h
@@ -0,0 +1,10 @@
+#define STATIC_ASSERT(expr)  extern char __static_assertion_failed [(expr) ? 1 : -1]
+#define SAVE_ERR(EXPR) {int __errno_save = errno; EXPR; errno = __errno_save;}
+#define __XSTRING(X) __STRING(X)
+/* #define PERROR(msg) {int __errno_cache = errno; if (getenv(DEBUG) != NULL) {fprintf(stderr, "%s|%d| %s: %s\n", __FILE__, __LINE__, __func__, msg); if (__errno_cache) {fprintf(stderr, "Error %d: %s\n", __errno_cache, strerror(__errno_cache));}};} */
+#define PERROR(msg)
+#define CHK(EXPR, MSG, ERR_LABEL) {if(EXPR) { PERROR(MSG); goto ERR_LABEL;}}
+#define LET(LETEXPR, CONDEXPR, MSG, ERR_LABEL) LETEXPR; if (CONDEXPR) { PERROR(MSG); goto ERR_LABEL;}
+#define TST(EXPR, TRUE, MSG, ERR_LABEL) {if (EXPR) {(TRUE); PERROR(MSG); goto ERR_LABEL;}}
+#define INIT(BUF, LEN, TYPE, INIT, MSG, ERR_LABEL) { CHK(*(LEN) < sizeof(TYPE), (MSG), ERR_LABEL); (*(TYPE*)(*(BUF))) = (INIT); (*(LEN)) -= sizeof(TYPE); (*(BUF)) += sizeof(TYPE); }
+#define COPY(BUF, LEN, TYPE, SRC, MSG, ERR_LABEL) { CHK(*(LEN) < sizeof(TYPE), (MSG), ERR_LABEL); memcpy(*(BUF), (SRC), sizeof(TYPE)); (*(LEN)) -= sizeof(TYPE); (*(BUF)) += sizeof(TYPE); }