diff options
Diffstat (limited to '')
-rw-r--r-- | src/util/Alloc.cxx | 86 |
1 files changed, 85 insertions, 1 deletions
diff --git a/src/util/Alloc.cxx b/src/util/Alloc.cxx index ec3579470..d4941f88b 100644 --- a/src/util/Alloc.cxx +++ b/src/util/Alloc.cxx @@ -1,5 +1,5 @@ /* - * Copyright (C) 2003-2014 The Music Player Daemon Project + * Copyright (C) 2003-2015 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify @@ -74,3 +74,87 @@ xstrndup(const char *s, size_t n) return p; } + +#if CLANG_OR_GCC_VERSION(4,7) + +template<typename... Args> +static inline size_t +FillLengths(size_t *lengths, const char *a, Args&&... args) +{ + return FillLengths(lengths, a) + FillLengths(lengths + 1, args...); +} + +template<> +inline size_t +FillLengths(size_t *lengths, const char *a) +{ + return *lengths = strlen(a); +} + +template<typename... Args> +static inline void +StringCat(char *p, const size_t *lengths, const char *a, Args&&... args) +{ + StringCat(p, lengths, a); + StringCat(p + *lengths, lengths + 1, args...); +} + +template<> +inline void +StringCat(char *p, const size_t *lengths, const char *a) +{ + memcpy(p, a, *lengths); +} + +#endif + +template<typename... Args> +gcc_malloc gcc_nonnull_all +static inline char * +t_xstrcatdup(Args&&... args) +{ +#if CLANG_OR_GCC_VERSION(4,7) + constexpr size_t n = sizeof...(args); + + size_t lengths[n]; + const size_t total = FillLengths(lengths, args...); + + char *p = (char *)xalloc(total + 1); + StringCat(p, lengths, args...); + p[total] = 0; + return p; +#else + /* fallback implementation for gcc 4.6, because that old + compiler is too buggy to compile the above template + functions */ + const char *const argv[] = { args... }; + + size_t total = 0; + for (auto i : argv) + total += strlen(i); + + char *p = (char *)xalloc(total + 1), *q = p; + for (auto i : argv) + q = stpcpy(q, i); + + return p; +#endif +} + +char * +xstrcatdup(const char *a, const char *b) +{ + return t_xstrcatdup(a, b); +} + +char * +xstrcatdup(const char *a, const char *b, const char *c) +{ + return t_xstrcatdup(a, b, c); +} + +char * +xstrcatdup(const char *a, const char *b, const char *c, const char *d) +{ + return t_xstrcatdup(a, b, c, d); +} |