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65 lines
1.1 KiB
65 lines
1.1 KiB
4 years ago
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\section{Παράρτημα Α}
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\subsection{Κώδικας}
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\begin{lstlisting}[language=C]
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#include <stdio.h>
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#include <stdint.h>
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static const uint8_t hashtbl[] = {
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18, 11, 10, 21, 7, 5, 9, 22, 17, 2, 12, 3, 19, 1, 14, 16, 20, 8, 23, 4, 26, 15, 6, 24, 13, 25
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};
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__asm int generate_hash( const char *str, const uint8_t *hashtbl, int *hashptr )
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{
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input_str RN r0
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hashtbl RN r1
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hashptr RN r2
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curr_char RN r6
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hash_val RN r3
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MOV hash_val, #0
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hash_loop
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LDRB curr_char, [input_str]
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CMP curr_char, #'0'
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BLS hash_skip
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CMP curr_char, #'9'
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SUBLS hash_val, curr_char
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ADDLS hash_val, #48
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BLS hash_skip
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CMP curr_char, #'A' - 1
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BLS hash_skip
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CMP curr_char, #'Z'
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BHI hash_skip
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SUB r4, curr_char, #65
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ADD r4, hashtbl, r4
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LDRB r5, [r4]
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ADD hash_val, r5
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hash_skip
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ADD input_str, input_str, #
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CMP curr_char, #0
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BNE hash_loop
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MOVEQ r0, hash_val
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STR hash_val, [hashptr]
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BX lr
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}
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int main( void )
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{
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static const char STRING_TO_HASH[] = "FD7N8JT!EGMIQH2@3ZW0ABCRSLOYV45PK1#X6U!9";
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int hash = 0;
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int hash2;
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hash = generate_hash(STRING_TO_HASH, hashtbl, &hash2);
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printf("%d", hash);
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printf("%d", hash2);
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return 0;
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}
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\end{lstlisting}
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