Add error handler

1 files changed, 34 insertions, 0 deletions

diff --git a/include/error_handler.h b/include/error_handler.h
new file mode 100644
index 0000000..a731d28
--- /dev/null
+++ b/include/error_handler.h
@@ -0,0 +1,34 @@
+#ifndef SPM_ERROR_HANDLER_H
+#define SPM_ERROR_HANDLER_H
+
+#define _SPM_ERR_BASE 0x8000                    // SPM errors begin at 32768
+#define _SPM_ERR_MASK 0x7FFF                    // Support up to 32768 error strings (zero index)
+#define _SPM_ERR(X) _SPM_ERR_BASE + X           // Create an error code
+#define SPM_ERR_CONFIRM(X) (X >= 0x8000)        // Is X a SPM error code? (no=0, yes=!0)
+#define SPM_ERR_INDEX(X) (_SPM_ERR_MASK & X)    // get index of error string
+
+#define SPM_ERR_SUCCESS             _SPM_ERR(0)     // no error
+#define SPM_ERR_ROOT_NO_RECORD      _SPM_ERR(1)     // "root" has no root record
+#define SPM_ERR_ROOT_UNSAFE         _SPM_ERR(2)     // "root" at root, "/"
+#define SPM_ERR_PKG_NOT_FOUND       _SPM_ERR(3)     // package not found
+#define SPM_ERR_PKG_INVALID         _SPM_ERR(4)     // invalid package (wrong structure, missing data, etc)
+#define SPM_ERR_PKG_CHECKSUM        _SPM_ERR(5)     // bad checksum
+#define SPM_ERR_PKG_FETCH           _SPM_ERR(6)     // failed to download package
+
+extern int spmerrno;
+
+static const char *SPM_ERR_STRING[] = {
+        "Success",
+        "No root record",
+        "Dangerous root path",
+        "Package not found",
+        "Invalid package",
+        "Bad package checksum",
+        "Failed to fetch package",
+        NULL,
+};
+
+char *spm_strerror(int code);
+void spm_perror(const char *msg);
+
+#endif //SPM_ERROR_HANDLER_H