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util: buffer: Simplify escape buffer allocations

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Replace combinations of xalloc_oversized and VIR_ALLOC_N_QUIET by using
g_malloc0_n which does the checking internally.

This conversion is done with a semantic difference and slightly higher
memory requirements as I've opted to allocate one chunk more than
necessary rather than trying to accomodate the NUL byte separately.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2019-10-24 08:49:57 +02:00
parent ff06e83407
commit 241057681a
1 changed files with 4 additions and 15 deletions
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19
src/util/virbuffer.c
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@ -467,11 +467,7 @@ virBufferEscapeString(virBufferPtr buf, const char *format, const char *str)
return;
}
if (xalloc_oversized(6, len) ||
VIR_ALLOC_N_QUIET(escaped, 6 * len + 1) < 0) {
virBufferSetError(buf, errno);
return;
}
escaped = g_malloc0_n(len + 1, 6);
cur = str;
out = escaped;
@ -616,11 +612,7 @@ virBufferEscape(virBufferPtr buf, char escape, const char *toescape,
return;
}
if (xalloc_oversized(2, len) ||
VIR_ALLOC_N_QUIET(escaped, 2 * len + 1) < 0) {
virBufferSetError(buf, errno);
return;
}
escaped = g_malloc0_n(len + 1, 2);
cur = str;
out = escaped;
@ -715,11 +707,8 @@ virBufferEscapeShell(virBufferPtr buf, const char *str)
if (*str) {
len = strlen(str);
if (xalloc_oversized(4, len) ||
VIR_ALLOC_N_QUIET(escaped, 4 * len + 3) < 0) {
virBufferSetError(buf, errno);
return;
}
escaped = g_malloc0_n(len + 1, 4);
} else {
virBufferAddLit(buf, "''");
return;