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root / lab2 / utils.c @ 22

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#include <lcom/lcf.h>
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#include <stdint.h>
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/* Byte Masks */
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#define LSB 0xFF /**< @brief mask to filter least significant byte */
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int(util_get_LSB)(uint16_t val, uint8_t *lsb) {
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    if (lsb == NULL) return 1;
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    *lsb = val & LSB;
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    return 0;
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}
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int(util_get_MSB)(uint16_t val, uint8_t *msb) {
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    if (msb == NULL) return 1;
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    *msb = val >> 8;
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    return 0;
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}
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int (util_sys_inb)(int port, uint8_t *value) {
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    if(value == NULL) return 1;
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    uint32_t n = 0;
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    if(sys_inb(port, &n)) return 1;
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    *value = n & LSB;
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    return 0;
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}