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https://github.com/git/git.git
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107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "git-compat-util.h"
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void vreport(const char *prefix, const char *err, va_list params)
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{
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char msg[1024];
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vsnprintf(msg, sizeof(msg), err, params);
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fprintf(stderr, "%s%s\n", prefix, msg);
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}
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static NORETURN void usage_builtin(const char *err)
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{
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fprintf(stderr, "usage: %s\n", err);
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exit(129);
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}
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static NORETURN void die_builtin(const char *err, va_list params)
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{
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vreport("fatal: ", err, params);
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exit(128);
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}
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static void error_builtin(const char *err, va_list params)
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{
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vreport("error: ", err, params);
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}
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static void warn_builtin(const char *warn, va_list params)
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{
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vreport("warning: ", warn, params);
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}
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typedef void (*die_fn_t)(const char *err, va_list params) NORETURN;
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static DWORD tls_index;
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static void tls_init(void) __attribute__((constructor));
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static void tls_init(void)
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{
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tls_index = TlsAlloc();
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}
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struct routines {
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die_fn_t die_routine;
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};
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/* If we are in a dlopen()ed .so write to a global variable would segfault
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* (ugh), so keep things static. */
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static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
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static void (*error_routine)(const char *err, va_list params) = error_builtin;
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static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
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void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
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{
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struct routines *r = TlsGetValue(tls_index);
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if (r == NULL) {
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/* avoid die()! */
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r = calloc(sizeof(*r), 1);
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if (r == NULL) {
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fprintf(stderr, "cannot allocate thread-local storage");
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return;
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}
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TlsSetValue(tls_index, r);
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}
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r->die_routine = routine;
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}
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void usage(const char *err)
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{
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usage_routine(err);
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}
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void die(const char *err, ...)
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{
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va_list params;
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struct routines *r = TlsGetValue(tls_index);
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va_start(params, err);
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if (r == NULL || r->die_routine == NULL)
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die_builtin(err, params);
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else
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r->die_routine(err, params);
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va_end(params);
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}
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int error(const char *err, ...)
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{
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va_list params;
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va_start(params, err);
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error_routine(err, params);
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va_end(params);
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return -1;
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}
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void warning(const char *warn, ...)
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{
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va_list params;
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va_start(params, warn);
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warn_routine(warn, params);
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va_end(params);
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}
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