Root/tools/perf/util/usage.c

1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "util.h"
7
8static void report(const char *prefix, const char *err, va_list params)
9{
10    char msg[1024];
11    vsnprintf(msg, sizeof(msg), err, params);
12    fprintf(stderr, " %s%s\n", prefix, msg);
13}
14
15static NORETURN void usage_builtin(const char *err)
16{
17    fprintf(stderr, "\n Usage: %s\n", err);
18    exit(129);
19}
20
21static NORETURN void die_builtin(const char *err, va_list params)
22{
23    report(" Fatal: ", err, params);
24    exit(128);
25}
26
27static void error_builtin(const char *err, va_list params)
28{
29    report(" Error: ", err, params);
30}
31
32static void warn_builtin(const char *warn, va_list params)
33{
34    report(" Warning: ", warn, params);
35}
36
37/* If we are in a dlopen()ed .so write to a global variable would segfault
38 * (ugh), so keep things static. */
39static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
40static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
41static void (*error_routine)(const char *err, va_list params) = error_builtin;
42static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
43
44void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
45{
46    die_routine = routine;
47}
48
49void usage(const char *err)
50{
51    usage_routine(err);
52}
53
54void die(const char *err, ...)
55{
56    va_list params;
57
58    va_start(params, err);
59    die_routine(err, params);
60    va_end(params);
61}
62
63int error(const char *err, ...)
64{
65    va_list params;
66
67    va_start(params, err);
68    error_routine(err, params);
69    va_end(params);
70    return -1;
71}
72
73void warning(const char *warn, ...)
74{
75    va_list params;
76
77    va_start(params, warn);
78    warn_routine(warn, params);
79    va_end(params);
80}
81

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