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+/**
+ * MIT/X Consortium License
+ *
+ * Copyright © 2015 Mattias Andrée <maandree@member.fsf.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+
+#define t(...) do { if (__VA_ARGS__) goto fail; } while (0)
+
+
+#define REALLOC(PTR, SIZE) \
+ do { \
+ void *new__; \
+ new__ = realloc(PTR, (SIZE) * sizeof(*(PTR))); \
+ t (new__ == NULL); \
+ (PTR) = new__; \
+ } while (0)
+
+
+#define GROW(PTR, SIZE, DEFAULT) \
+ do { \
+ (SIZE) = (SIZE) ? ((SIZE) << 1) : (DEFAULT); \
+ REALLOC(PTR, SIZE); \
+ } while (0)
+
+
+#define MAYBE_GROW(PTR, USED, SIZE, DEFAULT) \
+ do { \
+ if ((USED) == (SIZE)) \
+ GROW(PTR, SIZE, DEFAULT); \
+ } while (0)
+
+
+#define GET_VERSION(VER, PATH) \
+ do { \
+ (VER) = strrchr((PATH), '='); \
+ assert((VER) && !strchr((VER), '/')); \
+ } while (0)
+
+
+#define NEVER_REACHED \
+ do { \
+ assert(0); \
+ abort(); \
+ } while (0)
+
+
+#define RETURN(R) \
+ for (int errno__ = errno, x__ = 0;; errno = errno__, x__++) \
+ if (x__) return (R); else
+
+
+#define TEMP_NUL(P, ACTION) \
+ do { \
+ char P##__c = *(P); \
+ *(P) = '\0'; \
+ ACTION; \
+ *(P) = P##__c; \
+ } while (0)
+