pload.c

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/**
 * @file
 * @ingroup data
 * @brief The packet loader.
 *
 * Address range 42b050-42b15f. PacketLoad's diagnostic names its source,
 * `Library\Source\Pload.c`, the only original path the game core keeps.
 */
#include "wc1.h"
 
/* Linker commons defined here; LINK orders them by identifier hash. */
struct Shape *pTgtLockShapePtr; /* 0x005a6bf4 */
unsigned char *apTextFonts[4]; /* 0x005a6c00 */
FontWorkspace **apFontWorkspaces[4]; /* 0x005a6c10 */
FixedVector aDirectionViewRightVector[DIRECTION_VIEW_COUNT]; /* 0x005a6c20 */
FixedVector aDirectionViewUpVectorArray[DIRECTION_VIEW_COUNT]; /* 0x005a6f10 */
FixedVector aDirectionViewForwardVector[DIRECTION_VIEW_COUNT]; /* 0x005a7200 */
 
/* Function start: 0x42B050 */
void * __stdcall PacketLoad(const char *filename, short section,
                            void *destination, unsigned short flags,
                            void *decompressionWorkspace)
{
    unsigned char *packet;
    PacketSectionHandle handle;
    int compression;
 
    packet = 0;
    if (OpenPacketSection(filename, section, &handle) != 0) {
        compression = handle.compression;
        switch (compression) {
        case 1:
            SystemDebugPrintf(
                "[SYSTEM] : ERROR\n"
                "Library\\Source\\Pload.c PacketLoad  Compressed data in '%s'\n",
                filename);
            SystemDebugPrintf("[SYSTEM] : Exiting prematurely\n");
            ClearDebugPauseFlags();
            PumpMessagesDuringWait();
            exit(0);
            packet = DecompressPacketSection(
                &handle, destination, flags, decompressionWorkspace);
            break;
        default:
            if (handle.dataSize == 0) {
                nPacketError = 8;
            } else {
                packet = destination;
                if (packet == 0) {
                    packet = AllocateTaggedMemory(
                        handle.dataSize,
                        (unsigned short)(flags | 0x40));
                    pLastPacketAllocation = packet;
                    if (packet == 0)
                        nPacketError = 4;
                }
                if (packet != 0) {
                    if (IsPushedPacketHandle(packet) == 0)
                        exit_squadron(
                            "qq PacketLoad with non-pushed dest");
                    if (ReadPacketSectionData(
                            &handle, packet, handle.dataSize) == 0)
                        packet = 0;
                }
            }
            break;
        }
        CloseDataFileByHandle(&handle);
    }
    return packet;
}