errors.c 2.42 KB
Newer Older
1
/*
Edward Thomson committed
2
 * Copyright (C) the libgit2 contributors. All rights reserved.
3
 *
Vicent Marti committed
4 5
 * This file is part of libgit2, distributed under the GNU GPL v2 with
 * a Linking Exception. For full terms see the included COPYING file.
6
 */
7
#include "common.h"
8
#include "global.h"
9
#include "posix.h"
10
#include "buffer.h"
11 12
#include <stdarg.h>

13 14 15 16
/********************************************
 * New error handling
 ********************************************/

17 18 19 20 21
static git_error g_git_oom_error = {
	"Out of memory",
	GITERR_NOMEMORY
};

22 23 24 25 26 27 28 29 30 31 32 33
static void set_error(int error_class, char *string)
{
	git_error *error = &GIT_GLOBAL->error_t;

	git__free(error->message);

	error->message = string;
	error->klass = error_class;

	GIT_GLOBAL->last_error = error;
}

34 35 36 37 38 39
void giterr_set_oom(void)
{
	GIT_GLOBAL->last_error = &g_git_oom_error;
}

void giterr_set(int error_class, const char *string, ...)
40
{
41
	git_buf buf = GIT_BUF_INIT;
42
	va_list arglist;
43 44 45 46
#ifdef GIT_WIN32
	DWORD win32_error_code = (error_class == GITERR_OS) ? GetLastError() : 0;
#endif
	int error_code = (error_class == GITERR_OS) ? errno : 0;
47 48

	va_start(arglist, string);
49
	git_buf_vprintf(&buf, string, arglist);
50 51
	va_end(arglist);

52
	if (error_class == GITERR_OS) {
53
#ifdef GIT_WIN32
54 55
		if (win32_error_code) {
			char *lpMsgBuf;
56

57 58 59 60 61
			if (FormatMessageA(
					FORMAT_MESSAGE_ALLOCATE_BUFFER |
					FORMAT_MESSAGE_FROM_SYSTEM |
					FORMAT_MESSAGE_IGNORE_INSERTS,
					NULL, win32_error_code, 0, (LPSTR)&lpMsgBuf, 0, NULL)) {
62 63
				git_buf_PUTS(&buf, ": ");
				git_buf_puts(&buf, lpMsgBuf);
64 65
				LocalFree(lpMsgBuf);
			}
66 67

			SetLastError(0);
68
		}
69
		else
70
#endif
71 72 73 74 75 76 77
		if (error_code) {
			git_buf_PUTS(&buf, ": ");
			git_buf_puts(&buf, strerror(error_code));
		}

		if (error_code)
			errno = 0;
78 79
	}

80 81
	if (!git_buf_oom(&buf))
		set_error(error_class, git_buf_detach(&buf));
82 83 84 85
}

void giterr_set_str(int error_class, const char *string)
{
86 87 88 89 90
	char *message;

	assert(string);

	message = git__strdup(string);
91

92 93
	if (message)
		set_error(error_class, message);
94 95
}

96
int giterr_set_regex(const regex_t *regex, int error_code)
97 98 99 100
{
	char error_buf[1024];
	regerror(error_code, regex, error_buf, sizeof(error_buf));
	giterr_set_str(GITERR_REGEX, error_buf);
101 102 103 104 105 106 107

	if (error_code == REG_NOMATCH)
		return GIT_ENOTFOUND;
	else if (error_code > REG_BADPAT)
		return GIT_EINVALIDSPEC;
	else
		return -1;
108 109
}

110
void giterr_clear(void)
111
{
112
	GIT_GLOBAL->last_error = NULL;
113 114 115 116 117

	errno = 0;
#ifdef GIT_WIN32
	SetLastError(0);
#endif
118
}
119

120
const git_error *giterr_last(void)
121 122 123 124
{
	return GIT_GLOBAL->last_error;
}