29 lines
625 B
C
29 lines
625 B
C
#include "fs.h"
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void file_read_fat(int *fat, unsigned char *img) {
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int i, j = 0;
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for (i = 0; i < 2880; i += 2) {
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fat[i + 0] = (img[j + 0] | img[j + 1] << 8) & 0xfff;
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fat[i + 1] = (img[j + 1] >> 4 | img[j + 2] << 4) & 0xfff;
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j += 3;
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}
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}
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void file_load_file(int clustno, int size, char *buf, int *fat, char *img) {
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for (;;) {
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if (size <= 512) {
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for (int i = 0; i < size; i++) {
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buf[i] = img[clustno * 512 + i];
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}
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break;
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}
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for (int i = 0; i < 512; i++) {
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buf[i] = img[clustno * 512 + i];
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}
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size -= 512;
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buf += 512;
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clustno = fat[clustno];
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}
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}
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