t7900-subtree: test the "space in a subdirectory name" case

diff --git a/strbuf.c b/strbuf.c
index bbaf32eef6b0b36ea52390be3aee2ffab7f24f13..29df55b1b0f36522be7e141e9f29ba2bfcc978c1 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -364,19 +364,19 @@ ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
 
        strbuf_grow(sb, hint ? hint : 8192);
        for (;;) {
-               ssize_t cnt;
+               ssize_t want = sb->alloc - sb->len - 1;
+               ssize_t got = read_in_full(fd, sb->buf + sb->len, want);
 
-               cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
-               if (cnt < 0) {
+               if (got < 0) {
                        if (oldalloc == 0)
                                strbuf_release(sb);
                        else
                                strbuf_setlen(sb, oldlen);
                        return -1;
                }
-               if (!cnt)
+               sb->len += got;
+               if (got < want)
                        break;
-               sb->len += cnt;
                strbuf_grow(sb, 8192);
        }
 
@@ -710,3 +710,36 @@ char *xstrfmt(const char *fmt, ...)
 
        return ret;
 }
+
+void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm)
+{
+       size_t hint = 128;
+       size_t len;
+
+       if (!*fmt)
+               return;
+
+       strbuf_grow(sb, hint);
+       len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm);
+
+       if (!len) {
+               /*
+                * strftime reports "0" if it could not fit the result in the buffer.
+                * Unfortunately, it also reports "0" if the requested time string
+                * takes 0 bytes. So our strategy is to munge the format so that the
+                * output contains at least one character, and then drop the extra
+                * character before returning.
+                */
+               struct strbuf munged_fmt = STRBUF_INIT;
+               strbuf_addf(&munged_fmt, "%s ", fmt);
+               while (!len) {
+                       hint *= 2;
+                       strbuf_grow(sb, hint);
+                       len = strftime(sb->buf + sb->len, sb->alloc - sb->len,
+                                      munged_fmt.buf, tm);
+               }
+               strbuf_release(&munged_fmt);
+               len--; /* drop munged space */
+       }
+       strbuf_setlen(sb, sb->len + len);
+}