From 681ca68ac96e8d39f49eb2c9f42e5c1e1041f5e0 Mon Sep 17 00:00:00 2001
From: mid-kid <esteve.varela@gmail.com>
Date: Thu, 4 Nov 2021 21:07:26 +0000
Subject: Disassemble some more tables and the first graphic (#71)

* Sync tools/ directory with pokeemerald

We really ought to have a central repository for this mess

* Make incremental builds faster

Scientists hate him!
He made NODEP disappear with this ONE SIMPLE TRICK!!!
Want to know more? -> __click here__ <-

* Disassemble some more tables and the first graphic
---
 tools/preproc/c_file.cpp | 55 ++++++++++++++++++++++++++++++++++++------------
 1 file changed, 42 insertions(+), 13 deletions(-)

(limited to 'tools/preproc/c_file.cpp')

diff --git a/tools/preproc/c_file.cpp b/tools/preproc/c_file.cpp
index 59426ef..94c0366 100644
--- a/tools/preproc/c_file.cpp
+++ b/tools/preproc/c_file.cpp
@@ -23,32 +23,59 @@
 #include <stdexcept>
 #include <string>
 #include <memory>
+#include <cstring>
+#include <cerrno>
 #include "preproc.h"
 #include "c_file.h"
 #include "char_util.h"
 #include "utf8.h"
 #include "string_parser.h"
 
-CFile::CFile(std::string filename) : m_filename(filename)
+CFile::CFile(const char * filenameCStr, bool isStdin)
 {
-    FILE *fp = std::fopen(filename.c_str(), "rb");
+    FILE *fp;
+
+    if (isStdin) {
+        fp = stdin;
+        m_filename = std::string{"<stdin>/"}.append(filenameCStr);
+    } else {
+        fp = std::fopen(filenameCStr, "rb");
+        m_filename = std::string(filenameCStr);
+    }
+
+    std::string& filename = m_filename;
 
     if (fp == NULL)
         FATAL_ERROR("Failed to open \"%s\" for reading.\n", filename.c_str());
 
-    std::fseek(fp, 0, SEEK_END);
-
-    m_size = std::ftell(fp);
+    m_size = 0;
+    m_buffer = (char *)malloc(CHUNK_SIZE + 1);
+    if (m_buffer == NULL) {
+        FATAL_ERROR("Failed to allocate memory to process file \"%s\"!", filename.c_str());
+    }
 
-    if (m_size < 0)
-        FATAL_ERROR("File size of \"%s\" is less than zero.\n", filename.c_str());
+    std::size_t numAllocatedBytes = CHUNK_SIZE + 1;
+    std::size_t bufferOffset = 0;
+    std::size_t count;
 
-    m_buffer = new char[m_size + 1];
+    while ((count = std::fread(m_buffer + bufferOffset, 1, CHUNK_SIZE, fp)) != 0) {
+        if (!std::ferror(fp)) {
+            m_size += count;
 
-    std::rewind(fp);
+            if (std::feof(fp)) {
+                break;
+            }
 
-    if (std::fread(m_buffer, m_size, 1, fp) != 1)
-        FATAL_ERROR("Failed to read \"%s\".\n", filename.c_str());
+            numAllocatedBytes += CHUNK_SIZE;
+            bufferOffset += CHUNK_SIZE;
+            m_buffer = (char *)realloc(m_buffer, numAllocatedBytes);
+            if (m_buffer == NULL) {
+                FATAL_ERROR("Failed to allocate memory to process file \"%s\"!", filename.c_str());
+            }
+        } else {
+            FATAL_ERROR("Failed to read \"%s\". (error: %s)", filename.c_str(), std::strerror(errno));
+        }
+    }
 
     m_buffer[m_size] = 0;
 
@@ -56,6 +83,7 @@ CFile::CFile(std::string filename) : m_filename(filename)
 
     m_pos = 0;
     m_lineNum = 1;
+    m_isStdin = isStdin;
 }
 
 CFile::CFile(CFile&& other) : m_filename(std::move(other.m_filename))
@@ -64,13 +92,14 @@ CFile::CFile(CFile&& other) : m_filename(std::move(other.m_filename))
     m_pos = other.m_pos;
     m_size = other.m_size;
     m_lineNum = other.m_lineNum;
+    m_isStdin = other.m_isStdin;
 
-    other.m_buffer = nullptr;
+    other.m_buffer = NULL;
 }
 
 CFile::~CFile()
 {
-    delete[] m_buffer;
+    free(m_buffer);
 }
 
 void CFile::Preproc()
-- 
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