X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=git-compat-util.h;h=86c896296686c94db6e9d0f2238a72aa383f647f;hb=694a577519a762d12b8a53e76b6f1dd3ccf25e7d;hp=1bfbdeb94f55d57b429b91aa8762618153c34f7f;hpb=077d6f72c7db84d2b6b3db879e3d68ab60482d43;p=git.git

diff --git a/git-compat-util.h b/git-compat-util.h
index 1bfbdeb94..86c896296 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -4,10 +4,24 @@
 #define _FILE_OFFSET_BITS 64
 
 #ifndef FLEX_ARRAY
-#if defined(__GNUC__) && (__GNUC__ < 3)
-#define FLEX_ARRAY 0
-#else
-#define FLEX_ARRAY /* empty */
+/*
+ * See if our compiler is known to support flexible array members.
+ */
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+# define FLEX_ARRAY /* empty */
+#elif defined(__GNUC__)
+# if (__GNUC__ >= 3)
+#  define FLEX_ARRAY /* empty */
+# else
+#  define FLEX_ARRAY 0 /* older GNU extension */
+# endif
+#endif
+
+/*
+ * Otherwise, default to safer but a bit wasteful traditional style
+ */
+#ifndef FLEX_ARRAY
+# define FLEX_ARRAY 1
 #endif
 #endif
 
@@ -20,6 +34,7 @@
 #endif
 
 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
+#define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */
 
 /* Approximation of the length of the decimal representation of this type. */
 #define decimal_length(x)	((int)(sizeof(x) * 2.56 + 0.5) + 1)
@@ -147,6 +162,11 @@ extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 extern int gitsetenv(const char *, const char *, int);
 #endif
 
+#ifdef NO_MKDTEMP
+#define mkdtemp gitmkdtemp
+extern char *gitmkdtemp(char *);
+#endif
+
 #ifdef NO_UNSETENV
 #define unsetenv gitunsetenv
 extern void gitunsetenv(const char *);
@@ -178,6 +198,22 @@ void *gitmemmem(const void *haystack, size_t haystacklen,
                 const void *needle, size_t needlelen);
 #endif
 
+#ifdef __GLIBC_PREREQ
+#if __GLIBC_PREREQ(2, 1)
+#define HAVE_STRCHRNUL
+#endif
+#endif
+
+#ifndef HAVE_STRCHRNUL
+#define strchrnul gitstrchrnul
+static inline char *gitstrchrnul(const char *s, int c)
+{
+	while (*s && *s != c)
+		s++;
+	return (char *)s;
+}
+#endif
+
 extern void release_pack_memory(size_t, int);
 
 static inline char* xstrdup(const char *str)
@@ -211,19 +247,20 @@ static inline void *xmalloc(size_t size)
 	return ret;
 }
 
-static inline char *xstrndup(const char *str, size_t len)
+static inline void *xmemdupz(const void *data, size_t len)
 {
-	char *p;
-
-	p = memchr(str, '\0', len);
-	if (p)
-		len = p - str;
-	p = xmalloc(len + 1);
-	memcpy(p, str, len);
+	char *p = xmalloc(len + 1);
+	memcpy(p, data, len);
 	p[len] = '\0';
 	return p;
 }
 
+static inline char *xstrndup(const char *str, size_t len)
+{
+	char *p = memchr(str, '\0', len);
+	return xmemdupz(str, p ? p - str : len);
+}
+
 static inline void *xrealloc(void *ptr, size_t size)
 {
 	void *ret = realloc(ptr, size);
@@ -375,4 +412,17 @@ static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 	return 0;
 }
 
+static inline int strtol_i(char const *s, int base, int *result)
+{
+	long ul;
+	char *p;
+
+	errno = 0;
+	ul = strtol(s, &p, base);
+	if (errno || *p || p == s || (int) ul != ul)
+		return -1;
+	*result = ul;
+	return 0;
+}
+
 #endif