diff options
author | Jim Meyering <jim@meyering.net> | 2000-07-31 07:23:01 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 2000-07-31 07:23:01 +0000 |
commit | 62a3c6b1d5d8c7bc4b6b8eb0623acd1257998996 (patch) | |
tree | d1a2490ce9ac88365abbacc486229936a455ef8a | |
parent | 3ff49f4a29bd0c284802faac0680055e4e80a7e4 (diff) | |
download | gnulib-62a3c6b1d5d8c7bc4b6b8eb0623acd1257998996.tar.gz |
(quotearg_n_options): Preallocate a slot 0
buffer, so that the caller can always quote one small
component of a "memory exhausted" message in slot 0.
From a suggestion by Jim Meyering.
-rw-r--r-- | lib/quotearg.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/lib/quotearg.c b/lib/quotearg.c index 9ed8a5fb12..a9c9fe339c 100644 --- a/lib/quotearg.c +++ b/lib/quotearg.c @@ -530,12 +530,17 @@ static char * quotearg_n_options (int n, char const *arg, struct quoting_options const *options) { - static unsigned int nslots; - static struct slotvec + /* Preallocate a slot 0 buffer, so that the caller can always quote + one small component of a "memory exhausted" message in slot 0. */ + static char slot0[256]; + static unsigned int nslots = 1; + struct slotvec { size_t size; char *val; - } *slotvec; + }; + static struct slotvec const slotvec0 = {sizeof slot0, slot0}; + static struct slotvec *slotvec = (struct slotvec *) &slotvec0; if (nslots <= n) { @@ -543,6 +548,11 @@ quotearg_n_options (int n, char const *arg, size_t s = n1 * sizeof (struct slotvec); if (! (0 < n1 && n1 == s / sizeof (struct slotvec))) abort (); + if (slotvec == &slotvec0) + { + slotvec = (struct slotvec *) xmalloc (sizeof (struct slotvec)); + *slotvec = slotvec0; + } slotvec = (struct slotvec *) xrealloc (slotvec, s); memset (slotvec + nslots, 0, (n1 - nslots) * sizeof (struct slotvec)); nslots = n; @@ -556,7 +566,7 @@ quotearg_n_options (int n, char const *arg, if (size <= qsize) { slotvec[n].size = size = qsize + 1; - slotvec[n].val = val = xrealloc (val, size); + slotvec[n].val = val = xrealloc (val == slot0 ? 0 : val, size); quotearg_buffer (val, size, arg, (size_t) -1, options); } |