perf tools: Remove subcmd dependencies on strbuf
Introduce and use new astrcat() and astrcatf() functions which replace
the strbuf functionality for subcmd.
For now they duplicate strbuf's die-on-allocation-error policy.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/957d207e1254406fa11fc2e405e75a7e405aad8f.1450193761.git.jpoimboe@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/subcmd-util.h b/tools/perf/util/subcmd-util.h
new file mode 100644
index 0000000..98fb9f9
--- /dev/null
+++ b/tools/perf/util/subcmd-util.h
@@ -0,0 +1,24 @@
+#ifndef __PERF_SUBCMD_UTIL_H
+#define __PERF_SUBCMD_UTIL_H
+
+#include <stdio.h>
+
+#define astrcatf(out, fmt, ...) \
+({ \
+ char *tmp = *(out); \
+ if (asprintf((out), "%s" fmt, tmp ?: "", ## __VA_ARGS__) == -1) \
+ die("asprintf failed"); \
+ free(tmp); \
+})
+
+static inline void astrcat(char **out, const char *add)
+{
+ char *tmp = *out;
+
+ if (asprintf(out, "%s%s", tmp ?: "", add) == -1)
+ die("asprintf failed");
+
+ free(tmp);
+}
+
+#endif /* __PERF_SUBCMD_UTIL_H */