From 79bf40f909cefdc611bfa13f70ae55b52ac41d23 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 10 Mar 2019 16:52:53 +0100
Subject: Load @import files relative to the file that uses @import

---
 src/std/file.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

(limited to 'src/std/file.c')

diff --git a/src/std/file.c b/src/std/file.c
index 46099b4..098b18f 100644
--- a/src/std/file.c
+++ b/src/std/file.c
@@ -14,6 +14,7 @@
 #include <unistd.h>
 
 #define SCANDIR_PATH_LENGTH 4096
+#define MAX_FILE_SIZE 1024*1024*48 /* 48 mb */
 
 static int scan_dir_recursive_internal(char *dir_path, int path_length, scan_dir_callback_func callback_func, void *userdata) {
     DIR *dir;
@@ -165,11 +166,40 @@ int mapped_file_deinit(MappedFile *self) {
         return 0;
 }
 
+typedef enum {
+    REGULAR,
+    DIRECTORY,
+    OTHER
+} FileType;
+
+static CHECK_RESULT int file_get_type(const char *filepath, FileType *type) {
+    struct stat file_stats;
+    if(stat(filepath, &file_stats) == -1) {
+        amal_log_perror(filepath);
+        return -1;
+    }
+
+    if(file_stats.st_mode & S_IFDIR)
+        *type = DIRECTORY;
+    else if(file_stats.st_mode & S_IFREG)
+        *type = REGULAR;
+    else
+        *type = OTHER;
+    return 0;
+}
+
 int read_whole_file(const char *filepath, char **data, usize *size) {
+    FileType file_type;
     FILE *file;
     int result;
     usize bytes_read;
 
+    return_if_error(file_get_type(filepath, &file_type));
+    if(file_type != REGULAR) {
+        amal_log_error("Expected file %s to be a regular file", filepath);
+        return -2;
+    }
+
     result = 0;
     file = fopen(filepath, "rb");
     if(!file) {
@@ -192,6 +222,12 @@ int read_whole_file(const char *filepath, char **data, usize *size) {
         goto cleanup;
     }
 
+    if(*size > MAX_FILE_SIZE) {
+        amal_log_error("File %s is too large (larger than 48 megabytes)", filepath);
+        result = -1;
+        goto cleanup;
+    }
+
     cleanup_if_error(am_malloc(*size, (void**)data));
     bytes_read = fread(*data, 1, *size, file);
     if(bytes_read != *size) {
@@ -202,3 +238,21 @@ int read_whole_file(const char *filepath, char **data, usize *size) {
     fclose(file);
     return result;
 }
+
+BufferView file_get_parent_directory(BufferView filepath) {
+    int i;
+    for(i = filepath.size - 1; i >= 0; --i) {
+        if(filepath.data[i] == '/')
+            return create_buffer_view(filepath.data, i);
+    }
+    return create_buffer_view(filepath.data, 0);
+}
+
+BufferView file_get_name(BufferView filepath) {
+    int i;
+    for(i = filepath.size - 1; i >= 0; --i) {
+        if(filepath.data[i] == '/')
+            return create_buffer_view(filepath.data + i, filepath.size - i);
+    }
+    return filepath;
+}
-- 
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