4 files changed, 99 insertions, 2 deletions
diff --git a/src/common/error.c b/src/common/error.c
index a3a08e7..ef6edff 100644
--- a/src/common/error.c
+++ b/src/common/error.c
@@ -6,9 +6,19 @@
  * See the file LICENSE.
  */
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#ifdef HAVE_WINDOWS_H
+#include <windows.h>
+#endif /* HAVE_WINDOWS_H */
+
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
+#include <string.h>
 #include "error.h"
 #include "utils.h"
 
@@ -24,19 +34,73 @@ bc_error_new(bc_error_type_t type, const char *msg)
 
 
 bc_error_t*
+bc_error_new_vprintf(bc_error_type_t type, const char *format, va_list ap)
+{
+    char *tmp = bc_strdup_vprintf(format, ap);
+    bc_error_t *rv = bc_error_new(type, tmp);
+    free(tmp);
+    return rv;
+}
+
+
+bc_error_t*
 bc_error_new_printf(bc_error_type_t type, const char *format, ...)
 {
     va_list ap;
     va_start(ap, format);
-    char *tmp = bc_strdup_vprintf(format, ap);
+    bc_error_t *rv = bc_error_new_vprintf(type, format, ap);
     va_end(ap);
-    bc_error_t *rv = bc_error_new(type, tmp);
+    return rv;
+}
+
+
+bc_error_t*
+bc_error_new_errno_vprintf(bc_error_type_t type, int errno_, const char *format,
+    va_list ap)
+{
+    char *tmp = bc_strdup_vprintf(format, ap);
+#if defined(WIN32) || defined(_WIN32)
+    LPTSTR buf = "bola";
+    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+        NULL, errno_, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&buf,
+        0, NULL);
+    bc_error_t *rv = bc_error_new_printf(type, "%s: %s", tmp, buf);
+    LocalFree(buf);
+#else
+    bc_error_t *rv = bc_error_new_printf(type, "%s: %s", tmp, strerror(errno_));
+#endif
     free(tmp);
     return rv;
 }
 
 
 bc_error_t*
+bc_error_new_errno_printf(bc_error_type_t type, int errno_, const char *format, ...)
+{
+    va_list ap;
+    va_start(ap, format);
+    bc_error_t *rv = bc_error_new_errno_vprintf(type, errno_, format, ap);
+    va_end(ap);
+    return rv;
+}
+
+
+bc_error_t*
+bc_error_new_default_errno_printf(bc_error_type_t type, const char *format, ...)
+{
+    va_list ap;
+    va_start(ap, format);
+#if defined(WIN32) || defined(_WIN32)
+    bc_error_t *rv = bc_error_new_errno_vprintf(type, GetLastError(), format, ap);
+#else
+    bc_error_t *rv = bc_error_new_errno_vprintf(type, errno, format, ap);
+#endif
+    va_end(ap);
+    return rv;
+}
+
+
+bc_error_t*
 bc_error_parser(bc_error_type_t type, const char *src, size_t src_len,
     size_t current, const char *format, ...)
 {
diff --git a/src/common/error.h b/src/common/error.h
index 2aac439..ccb4228 100644
--- a/src/common/error.h
+++ b/src/common/error.h
@@ -9,6 +9,7 @@
 #ifndef _ERROR_H
 #define _ERROR_H
 
+#include <stdarg.h>
 #include <stddef.h>
 
 // error handling is centralized here for the sake of simplicity :/
@@ -38,7 +39,14 @@ typedef struct {
 } bc_error_t;
 
 bc_error_t* bc_error_new(bc_error_type_t type, const char *msg);
+bc_error_t* bc_error_new_vprintf(bc_error_type_t type, const char *format, va_list ap);
 bc_error_t* bc_error_new_printf(bc_error_type_t type, const char *format, ...);
+bc_error_t* bc_error_new_errno_vprintf(bc_error_type_t type, int errno_,
+    const char *format, va_list ap);
+bc_error_t* bc_error_new_errno_printf(bc_error_type_t type, int errno_,
+    const char *format, ...);
+bc_error_t* bc_error_new_default_errno_printf(bc_error_type_t type,
+    const char *format, ...);
 bc_error_t* bc_error_parser(bc_error_type_t type, const char *src,
     size_t src_len, size_t current, const char *format, ...);
 void bc_error_print(bc_error_t *err, const char *prefix);
diff --git a/src/common/file.c b/src/common/file.c
index a2f7340..b44b202 100644
--- a/src/common/file.c
+++ b/src/common/file.c
@@ -7,9 +7,11 @@
  */
 
 #include <errno.h>
+#include <limits.h>
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "file.h"
 #include "error.h"
@@ -64,3 +66,25 @@ bc_file_get_contents(const char *path, bool utf8, size_t *len, bc_error_t **err)
 
     return bc_string_free(str, false);
 }
+
+
+char*
+bc_file_get_realpath(const char *path)
+{
+    if (path == NULL)
+        return NULL;
+
+#if defined(WIN32) || defined(_WIN32)
+    char *buf = bc_malloc(_MAX_PATH);
+    if (NULL == _fullpath(buf, path, _MAX_PATH)) {
+#else
+    char *buf = bc_malloc(PATH_MAX);
+    if (NULL == realpath(path, buf)) {
+#endif
+
+        free(buf);
+        return NULL;
+    }
+
+    return buf;
+}
diff --git a/src/common/file.h b/src/common/file.h
index 73793ea..73590c6 100644
--- a/src/common/file.h
+++ b/src/common/file.h
@@ -16,5 +16,6 @@
 #define BC_FILE_CHUNK_SIZE 1024
 
 char* bc_file_get_contents(const char *path, bool utf8, size_t *len, bc_error_t **err);
+char* bc_file_get_realpath(const char *path);
 
 #endif /* _FILE_H */