From 20f1d2b5ac2c7acb439a647d56b549b3463d257a Mon Sep 17 00:00:00 2001
From: Eric-Paul Ickhorn <ericp.ickhorn@gmail.com>
Date: Tue, 28 Nov 2023 21:25:53 +0100
Subject: [PATCH] Implemented a basic logger

---
 code/inc/logger.h | 105 ++++++++++++++++++++++++++++++++++++++++++++++
 code/src/logger.c |  45 ++++++++++++++++++++
 2 files changed, 150 insertions(+)
 create mode 100644 code/inc/logger.h
 create mode 100644 code/src/logger.c

diff --git a/code/inc/logger.h b/code/inc/logger.h
new file mode 100644
index 0000000..51ce7e0
--- /dev/null
+++ b/code/inc/logger.h
@@ -0,0 +1,105 @@
+
+#ifndef PARCEL_LOGGER_H
+#define PARCEL_LOGGER_H
+
+#include <utility.h>
+
+typedef enum
+{
+    PAC_SYNTAX_ERROR,
+    PAC_NAMING_ERROR,
+    PAC_INTERNAL_ERROR
+
+} pac_error_e;
+
+typedef enum
+{
+    PAC_SYNTAX_ERROR_UNSPECIFIED,
+    PAC_SYNTAX_ERROR_STRAY,
+    PAC_SYNTAX_ERROR_MISSING_TOKEN,
+    PAC_SYNTAX_ERROR_ODD_TOKEN
+
+} pac_syntax_error_e;
+
+typedef enum
+{
+    PAC_RESTRICTED_ERROR_INVALID_RULE_NAME
+
+} pac_naming_error_e;
+
+typedef struct pac_syntax_error
+{
+    usz_t                       line;
+    usz_t                       column;
+    
+    pac_syntax_error_e          type;
+    union pac_syntax_error_specifics
+    {
+        struct pac_syntax_error_stray
+        {
+            rune_t                      sign;
+        } stray;
+
+        struct pac_syntax_error_missing_token
+        {
+            char                       *wanted_token;
+            char                       *hint;
+        } missing_token;
+
+        struct pac_syntax_error_odd_token
+        {
+            usz_t                       num_valid_options;
+            char                       *valid_options[16];
+            char                       *found_token;
+            char                       *hint;
+        } odd_token;
+
+    } specifics;
+
+} pac_syntax_error_s;
+
+typedef struct pac_naming_error
+{
+    usz_t                       line;
+    usz_t                       column;
+    
+    pac_naming_error_e          type;
+    union pac_naming_error_specifics
+    {
+        struct pac_naming_error_invalid_rule_name
+        {
+            char                       *given_rule_name;
+        } invalid_rule_name;
+    } specifics;
+
+} pac_naming_error_s;
+
+
+typedef struct pac_error
+{
+    pac_error_e                 type;
+    union pac_error_data
+    {
+        pac_syntax_error_s          syntax_error;
+        pac_naming_error_s          naming_error;
+    } specifics;
+
+} pac_error_s;
+
+typedef struct pac_logger
+{
+    usz_t                       allocated_errors;
+    usz_t                       num_errors;
+    pac_error_s                *errors;
+
+    pac_arena_s                 string_arena;
+
+} pac_logger_s;
+
+pac_logger_s                pac_create_logger               ();
+void                        pac_log_syntax_error            (pac_logger_s *logger, pac_syntax_error_s error);
+void                        pac_log_naming_error            (pac_logger_s *logger, pac_naming_error_s error);
+
+void *                      pac_log_alloc                   (pac_logger_s *logger, usz_t num_bytes);
+
+#endif // PARCEL_LOGGER_H
diff --git a/code/src/logger.c b/code/src/logger.c
new file mode 100644
index 0000000..c7f8ada
--- /dev/null
+++ b/code/src/logger.c
@@ -0,0 +1,45 @@
+#include <logger.h>
+
+pac_logger_s pac_create_logger()
+{
+    pac_logger_s                logger;
+    logger.allocated_errors         = 1024;
+    logger.num_errors               = 0;
+    logger.errors                   = calloc(sizeof(pac_error_s), logger.allocated_errors);
+    logger.string_arena             = pac_create_arena(32768);
+
+    return logger;
+}
+
+void pac_resize_log_if_needed(pac_logger_s *logger)
+{
+    if(logger->num_errors >= logger->allocated_errors)
+    {
+        logger->allocated_errors       *= 2;
+        logger->errors                  =
+            realloc(logger->errors, sizeof(pac_error_s) * logger->allocated_errors);
+    }
+}
+
+void pac_log_syntax_error(pac_logger_s *logger, pac_syntax_error_s error)
+{
+    pac_resize_log_if_needed(logger);
+    logger->errors[logger->num_errors].type                     = PAC_SYNTAX_ERROR;
+    logger->errors[logger->num_errors].specifics.syntax_error   = error;
+    ++logger->num_errors;
+}
+
+void pac_log_naming_error(pac_logger_s *logger, pac_naming_error_s error)
+{
+    pac_resize_log_if_needed(logger);
+    logger->errors[logger->num_errors].type                     = PAC_NAMING_ERROR;
+    logger->errors[logger->num_errors].specifics.naming_error   = error;
+    ++logger->num_errors;
+}
+
+
+
+void * pac_log_alloc(pac_logger_s *logger, usz_t num_bytes)
+{
+    return ac_arena_alloc(logger->string_arena, num_bytes);
+}