Document --unified/-U option

diff --git a/git-compat-util.h b/git-compat-util.h
index 0b6d74d4d7ca0df726dd0464951a5e0f045c8715..362e040f52cf8df17811ae95e46f0b60d2b6f071 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -21,6 +21,9 @@
 
 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
 
+/* Approximation of the length of the decimal representation of this type. */
+#define decimal_length(x)      ((int)(sizeof(x) * 2.56 + 0.5) + 1)
+
 #if !defined(__APPLE__) && !defined(__FreeBSD__)
 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
@@ -164,13 +167,18 @@ extern size_t gitstrlcpy(char *, const char *, size_t);
 extern uintmax_t gitstrtoumax(const char *, char **, int);
 #endif
 
-extern void release_pack_memory(size_t);
+#ifdef NO_HSTRERROR
+#define hstrerror githstrerror
+extern const char *githstrerror(int herror);
+#endif
+
+extern void release_pack_memory(size_t, int);
 
 static inline char* xstrdup(const char *str)
 {
        char *ret = strdup(str);
        if (!ret) {
-               release_pack_memory(strlen(str) + 1);
+               release_pack_memory(strlen(str) + 1, -1);
                ret = strdup(str);
                if (!ret)
                        die("Out of memory, strdup failed");
@@ -184,7 +192,7 @@ static inline void *xmalloc(size_t size)
        if (!ret && !size)
                ret = malloc(1);
        if (!ret) {
-               release_pack_memory(size);
+               release_pack_memory(size, -1);
                ret = malloc(size);
                if (!ret && !size)
                        ret = malloc(1);
@@ -197,13 +205,26 @@ static inline void *xmalloc(size_t size)
        return ret;
 }
 
+static inline char *xstrndup(const char *str, size_t len)
+{
+       char *p;
+
+       p = memchr(str, '\0', len);
+       if (p)
+               len = p - str;
+       p = xmalloc(len + 1);
+       memcpy(p, str, len);
+       p[len] = '\0';
+       return p;
+}
+
 static inline void *xrealloc(void *ptr, size_t size)
 {
        void *ret = realloc(ptr, size);
        if (!ret && !size)
                ret = realloc(ptr, 1);
        if (!ret) {
-               release_pack_memory(size);
+               release_pack_memory(size, -1);
                ret = realloc(ptr, size);
                if (!ret && !size)
                        ret = realloc(ptr, 1);
@@ -219,7 +240,7 @@ static inline void *xcalloc(size_t nmemb, size_t size)
        if (!ret && (!nmemb || !size))
                ret = calloc(1, 1);
        if (!ret) {
-               release_pack_memory(nmemb * size);
+               release_pack_memory(nmemb * size, -1);
                ret = calloc(nmemb, size);
                if (!ret && (!nmemb || !size))
                        ret = calloc(1, 1);
@@ -236,7 +257,7 @@ static inline void *xmmap(void *start, size_t length,
        if (ret == MAP_FAILED) {
                if (!length)
                        return NULL;
-               release_pack_memory(length);
+               release_pack_memory(length, fd);
                ret = mmap(start, length, prot, flags, fd, offset);
                if (ret == MAP_FAILED)
                        die("Out of memory? mmap failed: %s", strerror(errno));
@@ -266,6 +287,22 @@ static inline ssize_t xwrite(int fd, const void *buf, size_t len)
        }
 }
 
+static inline int xdup(int fd)
+{
+       int ret = dup(fd);
+       if (ret < 0)
+               die("dup failed: %s", strerror(errno));
+       return ret;
+}
+
+static inline FILE *xfdopen(int fd, const char *mode)
+{
+       FILE *stream = fdopen(fd, mode);
+       if (stream == NULL)
+               die("Out of memory? fdopen failed: %s", strerror(errno));
+       return stream;
+}
+
 static inline size_t xsize_t(off_t len)
 {
        return (size_t)len;