mirror of https://github.com/xemu-project/xemu.git
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
#include "fatx.h"
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#include "qemu/bswap.h"
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#define FATX_SIGNATURE 0x58544146
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// This is from libfatx
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#pragma pack(1)
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struct fatx_superblock {
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uint32_t signature;
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uint32_t volume_id;
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uint32_t sectors_per_cluster;
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uint32_t root_cluster;
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uint16_t unknown1;
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uint8_t padding[4078];
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};
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#pragma pack()
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bool create_fatx_image(const char *filename, unsigned int size)
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{
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unsigned int empty_fat = cpu_to_le32(0xfffffff8);
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unsigned char zero = 0;
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FILE *fp = qemu_fopen(filename, "wb");
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if (fp != NULL) {
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struct fatx_superblock superblock;
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memset(&superblock, 0xff, sizeof(struct fatx_superblock));
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superblock.signature = cpu_to_le32(FATX_SIGNATURE);
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superblock.sectors_per_cluster = cpu_to_le32(4);
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superblock.volume_id = (uint32_t)rand();
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superblock.root_cluster = cpu_to_le32(1);
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superblock.unknown1 = 0;
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// Write the fatx superblock.
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fwrite(&superblock, sizeof(superblock), 1, fp);
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// Write the FAT
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fwrite(&empty_fat, sizeof(empty_fat), 1, fp);
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fseek(fp, size - sizeof(unsigned char), SEEK_SET);
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fwrite(&zero, sizeof(unsigned char), 1, fp);
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fflush(fp);
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fclose(fp);
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return true;
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}
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return false;
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}
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