test-pipe: make a bit more robust.

[gnulib.git] / lib / argp-fmtstream.c

diff --git a/lib/argp-fmtstream.c b/lib/argp-fmtstream.c
index c89a99c..7e6d9c6 100644 (file)
--- a/lib/argp-fmtstream.c
+++ b/lib/argp-fmtstream.c
@@ -226,7 +226,7 @@ __argp_fmtstream_update (argp_fmtstream_t fs)
          int i;
 
          p = buf + (r + 1 - fs->point_col);
-         while (p >= buf && !isblank (*p))
+         while (p >= buf && !isblank ((unsigned char) *p))
            --p;
          nextline = p + 1;     /* This will begin the next line.  */
 
@@ -236,7 +236,7 @@ __argp_fmtstream_update (argp_fmtstream_t fs)
              if (p >= buf)
                do
                  --p;
-               while (p >= buf && isblank (*p));
+               while (p >= buf && isblank ((unsigned char) *p));
              nl = p + 1;       /* The newline will replace the first blank. */
            }
          else
@@ -248,7 +248,7 @@ __argp_fmtstream_update (argp_fmtstream_t fs)
              if (p < nl)
                do
                  ++p;
-               while (p < nl && !isblank (*p));
+               while (p < nl && !isblank ((unsigned char) *p));
              if (p == nl)
                {
                  /* It already ends a line.  No fussing required.  */
@@ -261,7 +261,7 @@ __argp_fmtstream_update (argp_fmtstream_t fs)
              /* Swallow separating blanks.  */
              do
                ++p;
-             while (isblank (*p));
+             while (isblank ((unsigned char) *p));
              /* The next line will start here.  */
              nextline = p;
            }