Completely cleaned up PCI, added vsnprintf and snprintf.

Author: pradosh-arduino

source/includes/graphics.h

@@ -103,13 +103,6 @@ void printdec(int num);
  */
 void printbin(uint8_t value);
 
-/**
- * @brief Prints Hexadecimal number
- * 
- * @param hex the hexadecimal number to be printed.
- */
-void printhex(signed int num, bool caps);
-
 /**
  * @brief Prints with formatting supported.
  * 
@@ -151,6 +144,28 @@ void printfnoln_internal(cstring file, cstring func, int64 line, cstring format,
  */
 void vprintf_internal(cstring file, cstring func, int64 line, bool newline, cstring format, va_list argp);
 
+/**
+ * @brief Formats a string into a buffer using a va_list.
+ *
+ * @param buf  destination buffer.
+ * @param size buffer size in bytes.
+ * @param fmt  format string.
+ * @param args variable argument list.
+ * @return number of characters written (excluding null terminator).
+ */
+int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
+
+/**
+ * @brief Formats a string into a fixed-size buffer.
+ *
+ * @param buf  destination buffer.
+ * @param size buffer size in bytes.
+ * @param fmt  format string.
+ * @return number of characters written (excluding null terminator).
+ */
+int snprintf(char *buf, size_t size, const char *fmt, ...);
+
+
 /**
  * @brief Prints a char, using print(&c);
  * 

source/includes/pci.h

@@ -17,20 +17,15 @@
 #include <graphics.h>
 #include <drivers/rtl8139.h>
 #include <debugger.h>
+#include <ahci.h>
+#include <hal.h>
+#include <isr.h>
 
 extern cstring display_adapter_name;
 extern cstring GPUName[1]; //Max 2 GPUs allowed
 extern string using_graphics_card;
 extern int64* graphics_base_Address;
 
-typedef struct {
-    int16 vendor;
-    int16 device;
-    int8  classid;
-    string name;
-    int8 is_gpu;
-} pci_id_entry_t;
-
 // Define the base address for the PCI configuration space
 #define PCI_CONFIG_ADDRESS 0xCF8
 #define PCI_CONFIG_DATA    0xCFC

source/includes/pci_id.h

@@ -0,0 +1,82 @@
+/**
+ * @file pci_id.h
+ * @author Pradosh (pradoshgame@gmail.com)
+ * @brief The list of all officially recognized devices.
+ * @version 0.1
+ * @date 2025-12-27
+ * 
+ * @copyright Copyright (c) Pradosh 2025
+ * 
+ */
+
+#ifndef PCI_ID_H
+#define PCI_ID_H
+
+#include <basics.h>
+#include <pci_id.h>
+
+typedef void (*pci_probe_fn)(uint8_t bus, uint8_t slot, uint8_t function);
+
+typedef struct {
+    uint16_t vendor;
+    uint16_t device;
+    uint8_t  classid;    // 0xFF = ignore
+    const char* name;
+    uint8_t is_gpu;
+    pci_probe_fn probe;  // optional device-specific init
+} pci_id_entry_t;
+
+/**
+ * @brief Gets the vendor id and gives the appropriate name.
+ * 
+ * @param vendor vendor id
+ * @return string vendor name
+ */
+string parse_vendor(int16 vendor);
+
+/**
+ * @brief Gets the class id and gives the appropriate class name.
+ * 
+ * @param classid class id
+ * @return string class name
+ */
+string parse_class(int16 classid);
+
+/**
+ * @brief A Simplified and clean PCI lookup function.
+ * 
+ * @param vendor The vendor id.
+ * @param device The device id.
+ * @param classid The class id.
+ * @return const pci_id_entry_t*;s
+ */
+const pci_id_entry_t* pci_lookup(uint16_t vendor, uint16_t device, uint8_t classid);
+
+/**
+ * @brief Finds the AHCI BAR and handles it.
+ * 
+ * @param bus 
+ * @param slot 
+ * @param function 
+ */
+void probe_ahci(uint8_t bus, uint8_t slot, uint8_t function);
+
+/**
+ * @brief Finds the RTL8139 card and handles it.
+ * 
+ * @param bus 
+ * @param slot 
+ * @param function 
+ */
+void probe_rtl8139(uint8_t bus, uint8_t slot, uint8_t function);
+
+/**
+ * @brief Automatically names the unknown GPU with vendor name and its device id.
+ * 
+ * @param vendor the vendor id.
+ * @param device devide id.
+ * @return cstring; gpu name.
+ */
+cstring auto_name_gpu(uint16_t vendor, uint16_t device);
+
+#endif