feat(file): added delete file function

include/cosms-core/file.h

@@ -21,11 +21,14 @@ typedef enum {
     COSMS_CORE_FILE_FAILED_TO_ALLOCATE = -6,
     COSMS_CORE_FILE_FAILED_TO_READ = -7,
     COSMS_CORE_FILE_FAILED_TO_WRITE = -8,
+    COSMS_CORE_FILE_STILL_OPEN = -9,
 } CosmsCoreFileError;
 
 CosmsCoreFileError cosms_core_file_read(const char *path, char **content, unsigned long long *size);
 CosmsCoreFileError cosms_core_file_write(const char *path, const char *content, unsigned long long size, bool override);
 
+CosmsCoreFileError cosms_core_file_delete(const char *path);
+
 const char *cosms_core_file_error_string(CosmsCoreFileError error);
 
 #endif

src/file.c

@@ -237,6 +237,46 @@ CosmsCoreFileError cosms_core_file_write(const char *path, const char *content,
     return COSMS_CORE_FILE_OK;
 }
 
+CosmsCoreFileError cosms_core_file_delete(const char *path) {
+    #if defined(__GNUC__)
+    if (unlink(path) == -1) {
+        switch (errno) {
+            case ENOENT:
+                return COSMS_CORE_FILE_NOT_FOUND;
+
+            case EACCES:
+                return COSMS_CORE_FILE_NO_ACCESS;
+
+            case EBUSY:
+                return COSMS_CORE_FILE_STILL_OPEN;
+
+            default:
+                return COSMS_CORE_FILE_UNKOWN_ERROR;
+        }
+    }
+    #elif defined(_WIN32)
+    if (!DeleteFile(path)) {
+        switch(GetLastError()) {
+            case ERROR_FILE_NOT_FOUND:
+            case ERROR_PATH_NOT_FOUND:
+                return COSMS_CORE_FILE_NOT_FOUND;
+
+            case ERROR_ACCESS_DENIED:
+                return COSMS_CORE_FILE_NO_ACCESS;
+
+            case ERROR_LOCK_VIOLATION:
+            case ERROR_SHARING_VIOLATION:
+                return COSMS_CORE_FILE_STILL_OPEN;
+
+            default:
+                return COSMS_CORE_FILE_UNKOWN_ERROR;
+        }
+    }
+    #endif
+
+    return COSMS_CORE_FILE_OK;
+}
+
 const char *cosms_core_file_error_string(CosmsCoreFileError error) {
     switch(error) {
         case COSMS_CORE_FILE_OK:
@@ -266,6 +306,9 @@ const char *cosms_core_file_error_string(CosmsCoreFileError error) {
         case COSMS_CORE_FILE_FAILED_TO_WRITE:
             return "cosms-file failed to write content to file";
 
+        case COSMS_CORE_FILE_STILL_OPEN:
+            return "cosms-file still open";
+
         default:
             return NULL;
     }

tests/data/append-write-file.txt

@@ -1 +0,0 @@
-Hello, World!

tests/data/small-write-file.txt

@@ -1 +0,0 @@
-Hello, World!Hello, World!

tests/main.c

@@ -1,7 +1,9 @@
+#include "unit/file.h"
 #include "unit/unit.h"
 
 int main(void) {
     cosms_core_file_read_test();
     cosms_core_file_write_test();
+    cosms_core_file_delete_test();
 	return 0;
 }

tests/unit/file.c

@@ -146,3 +146,47 @@ void cosms_core_file_write_test() {
         free(file_content);
     }
 }
+
+void cosms_core_file_delete_test() {
+    COSMS_CORE_TEST_HEADER("file delete");
+
+    const char *current_test_name = "deleting small file";
+    COSMS_CORE_TEST_START(current_test_name);
+
+    CosmsCoreFileError error = cosms_core_file_delete("tests/data/small-write-file.txt");
+    if (cosms_core_test_assert(current_test_name, error == COSMS_CORE_FILE_OK, cosms_core_file_error_string(error))) {
+        char *file_content = NULL;
+        error = cosms_core_file_read("tests/data/small-write-file.txt", &file_content, NULL);
+        if (cosms_core_test_assert(current_test_name, error == COSMS_CORE_FILE_NOT_FOUND, cosms_core_file_error_string(error))) {
+            COSMS_CORE_TEST_SUCCESS(current_test_name);
+        }
+
+        if (file_content != NULL) {
+            free(file_content);
+        }
+    }
+
+    current_test_name = "deleting large file";
+    COSMS_CORE_TEST_START(current_test_name);
+
+    error = cosms_core_file_delete("tests/data/append-write-file.txt");
+    if (cosms_core_test_assert(current_test_name, error == COSMS_CORE_FILE_OK, cosms_core_file_error_string(error))) {
+        char *file_content = NULL;
+        error = cosms_core_file_read("tests/data/append-write-file.txt", &file_content, NULL);
+        if (cosms_core_test_assert(current_test_name, error == COSMS_CORE_FILE_NOT_FOUND, cosms_core_file_error_string(error))) {
+            COSMS_CORE_TEST_SUCCESS(current_test_name);
+        }
+
+        if (file_content != NULL) {
+            free(file_content);
+        }
+    }
+
+    current_test_name = "deleting non existing file";
+    COSMS_CORE_TEST_START(current_test_name);
+
+    error = cosms_core_file_delete("non-existing-file.cosms");
+    if (cosms_core_test_assert(current_test_name, error == COSMS_CORE_FILE_NOT_FOUND, cosms_core_file_error_string(error))) {
+        COSMS_CORE_TEST_SUCCESS(current_test_name);
+    }
+}

tests/unit/file.h

@@ -5,5 +5,6 @@
 
 void cosms_core_file_read_test();
 void cosms_core_file_write_test();
+void cosms_core_file_delete_test();
 
 #endif