From 37954d9b20c2cd30a7635b367122bf1c9baf2511 Mon Sep 17 00:00:00 2001
From: CK Tan <cktanx@gmail.com>
Date: Mon, 25 Oct 2021 23:21:48 -0700
Subject: [PATCH] add toml_key_exists()

---
 LICENSE |  2 +-
 toml.c  | 21 ++++++++++++++++++++-
 toml.h  |  4 +++-
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/LICENSE b/LICENSE
index a3292b1..bb09e49 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 CK Tan
+Copyright (c) CK Tan
 https://github.com/cktan/tomlc99
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
diff --git a/toml.c b/toml.c
index 8ec554e..89c0a26 100644
--- a/toml.c
+++ b/toml.c
@@ -2,7 +2,7 @@
 
   MIT License
 
-  Copyright (c) 2017 - 2021 CK Tan
+  Copyright (c) CK Tan
   https://github.com/cktan/tomlc99
 
   Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -1806,6 +1806,25 @@ const char* toml_key_in(const toml_table_t* tab, int keyidx)
 	return 0;
 }
 
+int toml_key_exists(const toml_table_t* tab, const char* key)
+{
+	int i;
+	for (i = 0; i < tab->nkval; i++) {
+		if (0 == strcmp(key, tab->kval[i]->key))
+			return 1;
+	}
+	for (i = 0; i < tab->narr; i++) {
+		if (0 == strcmp(key, tab->arr[i]->key))
+			return 1;
+	}
+	for (i = 0; i < tab->ntab; i++) {
+		if (0 == strcmp(key, tab->tab[i]->key))
+			return 1;
+	}
+	return 0;
+}
+
+
 toml_raw_t toml_raw_in(const toml_table_t* tab, const char* key)
 {
 	int i;
diff --git a/toml.h b/toml.h
index b91ef89..03adcbe 100644
--- a/toml.h
+++ b/toml.h
@@ -1,7 +1,7 @@
 /*
   MIT License
 
-  Copyright (c) 2017 - 2019 CK Tan
+  Copyright (c) CK Tan
   https://github.com/cktan/tomlc99
 
   Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -109,6 +109,8 @@ TOML_EXTERN toml_table_t* toml_table_at(const toml_array_t* arr, int idx);
 /* on tables: */
 /* ... retrieve the key in table at keyidx. Return 0 if out of range. */
 TOML_EXTERN const char* toml_key_in(const toml_table_t* tab, int keyidx);
+/* ... returns 1 if key exists in tab, 0 otherwise */
+TOML_EXTERN int toml_key_exists(const toml_table_t* tab, const char* key);
 /* ... retrieve values using key. */
 TOML_EXTERN toml_datum_t toml_string_in(const toml_table_t* arr, const char* key);
 TOML_EXTERN toml_datum_t toml_bool_in(const toml_table_t* arr, const char* key);