include/cosms-core/file.h

@@ -26,4 +26,6 @@ typedef enum {
 CosmsFileError cosms_core_file_read(const char *path, char **content, unsigned long long *size);
 CosmsFileError cosms_core_file_write(const char *path, const char *content, unsigned long long size, bool override);
 
+const char *cosms_core_file_error_string(CosmsFileError error);
+
 #endif

src/file.c

@@ -230,3 +230,37 @@ CosmsFileError cosms_core_file_write(const char *path, const char *content, unsi
 
     return COSMS_FILE_OK;
 }
+
+const char *cosms_core_file_error_string(CosmsFileError error) {
+    switch(error) {
+        case COSMS_FILE_OK:
+            return "cosms-file everything ok";
+
+        case COSMS_FILE_NOT_FOUND:
+            return "cosms-file path not found";
+
+        case COSMS_FILE_NO_ACCESS:
+            return "cosms-file no access";
+
+        case COSMS_FILE_LIMIT_REACHED:
+            return "cosms-file to many open files";
+
+        case COSMS_FILE_COULD_NOT_READ_SIZE:
+            return "cosms-file failed to read size";
+
+        case COSMS_FILE_UNKOWN_ERROR:
+            return "cosms-file unkown error occured";
+
+        case COSMS_FILE_FAILED_TO_ALLOCATE:
+            return "cosms-file failed to allocate memory";
+
+        case COSMS_FILE_FAILED_TO_READ:
+            return "cosms-file failed to read content of file";
+
+        case COSMS_FILE_FAILED_TO_WRITE:
+            return "cosms-file failed to write content to file";
+
+        default:
+            return NULL;
+    }
+}

tests/main.c

@@ -7,17 +7,15 @@ int main(void) {
     char *buffer;
 	CosmsFileError error = cosms_core_file_read("test.txt", &buffer, &buffer_size);
     if (error != COSMS_FILE_OK) {
-        fprintf(stderr, "failed to read file exited with error code: %d\n", error);
-        return -1;
+        fprintf(stderr, "error(%d): %s\n", error, cosms_core_file_error_string(error));
+    } else {
+        printf("file read with content:\n%s\n", buffer);
     }
 
-    printf("File read with content:\n%s\n", buffer);
-
     char *temp_buffer = "Hello, World!";
     error = cosms_core_file_write("write-file.txt", temp_buffer, 13, true);
     if (error != COSMS_FILE_OK) {
-        fprintf(stderr, "failed to write file exited with error code: %d\n", error);
-        return -1;
+        fprintf(stderr, "error(%d): %s\n", error, cosms_core_file_error_string(error));
     }
 
 	return 0;