feat(atoi_base): O(n) yay

This commit is contained in:
gbrochar 2024-03-11 15:13:30 +01:00
parent cd40b66c0e
commit 8331a437c0
4 changed files with 130 additions and 92 deletions

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@ -11,6 +11,7 @@ SRC = \
ft_list_push_front.s \
ft_list_sort.s \
ft_list_remove_if.s \
ft_atoi_base.s \
OBJ = $(SRC:.s=.o)

123
ft_atoi_base.s Normal file
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@ -0,0 +1,123 @@
global ft_atoi_base
extern malloc ; for LUT
extern free ; for LUT
ft_atoi_base:
push rsp
push rbx
push r12 ; sign
push r13 ; base
push r14 ; return value
push r15 ; base LUT
push rdi
push rsi
mov rdi, 128
call malloc WRT ..plt
mov r15, rax
pop rsi
pop rdi
push rdi
push rsi
xor rcx, rcx
.init_lut_loop: ; sets LUT to 0
cmp rcx, 128
je .set_base
mov byte [r15 + rcx], 0
inc rcx
jmp .init_lut_loop
.set_base:
xor rcx, rcx ; rcx is base length/count
.set_base_loop:
cmp byte [rsi + rcx], 0
je .check_base_len
cmp byte [rsi + rcx], 43
je .error
cmp byte [rsi + rcx], 45
je .error
cmp byte [rsi + rcx], 126
jg .error
cmp byte [rsi + rcx], 33
jl .error
xor rbx, rbx
mov bl, byte [rsi + rcx]
cmp byte [r15 + rbx], 0
jne .error
mov rdx, rcx
inc rdx
mov byte [r15 + rbx], dl
inc rcx
jmp .set_base_loop
.check_base_len:
cmp rcx, 2
jl .error
mov r13, rcx
xor rcx, rcx ; index = 0
xor r14, r14 ; number = 0
mov r12, 1 ; sign = 0
.skip_white_spaces:
cmp byte [rdi + rcx], 33
jle .skip_once
cmp byte [rdi + rcx], 126
jg .skip_once
jmp .get_sign_loop
.skip_once:
inc rcx
jmp .skip_white_spaces
.get_sign_loop:
cmp byte [rdi + rcx], 43
je .pos_once
cmp byte [rdi + rcx], 45
je .neg_once
jmp .get_number_loop
.pos_once:
inc rcx
jmp .get_sign_loop
.neg_once:
neg r12
inc rcx
jmp .get_sign_loop
.get_number_loop:
xor rbx, rbx
mov bl, byte [rdi + rcx]
cmp bl, 0
je .done
mov bl, byte [r15 + rbx] ; set bl to base index
cmp bl, 0
je .done
mov rax, r14
mul r13
mov r14, rax
dec rbx
add r14, rbx
inc rcx
jmp .get_number_loop
.error:
mov r14, 0
.done:
mov rdi, r15
call free WRT ..plt
mov rax, r14
cmp r12, 1
je .exit
neg rax
.exit:
pop rsi
pop rdi
pop r15
pop r14
pop r13
pop r12
pop rbx
pop rsp
ret

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@ -21,6 +21,7 @@ void ft_list_push_front(t_list **, void *);
int ft_list_size(t_list *);
void ft_list_sort(t_list **, int (*)());
void ft_list_remove_if(t_list **, void *, int (*)(), void (*)(void *));
int ft_atoi_base(char *, char *);
void ft_list_print(t_list *begin_list);

97
main.c
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@ -17,98 +17,11 @@ int ft_strcmp(const char *s1, const char *s2) {
}
int main(void) {
/*
t_list *list;
list = NULL;
ft_list_push_front(&list, "toto\n");
ft_list_push_front(&list, "tutu\n");
ft_list_push_front(&list, "zaza\n");
ft_list_push_front(&list, "bobo\n");
ft_list_push_front(&list, "tata\n");
ft_list_push_front(&list, "babar\n");
ft_list_push_front(&list, "zoro\n");
ft_list_print(list);
printf("%lu\n", sizeof(t_list));
printf("%d\n", ft_list_size(list));
ft_list_sort(&list, &ft_strcmp);
ft_list_print(list);
t_list *a;
a = NULL;
ft_list_push_front(&a, "d\n");
ft_list_push_front(&a, "c\n");
ft_list_push_front(&a, "b\n");
ft_list_push_front(&a, "a\n");
ft_list_print(a);
ft_list_sort(&a, &ft_strcmp);
printf("On est sorti.e.s de cet enfer\n");
ft_list_print(a);
t_list *b;
b = NULL;
ft_list_push_front(&b, "ziziron\n");
ft_list_push_front(&b, "abalon\n");
ft_list_push_front(&b, "zebulon\n");
ft_list_print(b);
ft_list_sort(&b, &ft_strcmp);
ft_list_print(b);
t_list *null = NULL;
ft_list_sort(&null, &ft_strcmp);
t_list *begin_ok = NULL;
ft_list_push_front(&begin_ok, "c");
ft_list_push_front(&begin_ok, "f");
ft_list_push_front(&begin_ok, "b");
ft_list_push_front(&begin_ok, "h");
ft_list_push_front(&begin_ok, "e");
ft_list_push_front(&begin_ok, "l");
ft_list_push_front(&begin_ok, "d");
ft_list_push_front(&begin_ok, "i");
ft_list_push_front(&begin_ok, "j");
ft_list_push_front(&begin_ok, "k");
ft_list_push_front(&begin_ok, "g");
ft_list_push_front(&begin_ok, "a");
ft_list_print(begin_ok);
printf("\n");
ft_list_sort(&begin_ok, &ft_strcmp);
printf("\n");
printf("\n");
ft_list_print(begin_ok);
printf("\n");
*/
t_list *c = NULL;
ft_list_push_front(&c, "b\n");
ft_list_push_front(&c, "c\n");
ft_list_push_front(&c, "a\n");
ft_list_push_front(&c, "c\n");
ft_list_push_front(&c, "a\n");
ft_list_push_front(&c, "b\n");
ft_list_push_front(&c, "c\n");
ft_list_push_front(&c, "c\n");
ft_list_push_front(&c, "b\n");
ft_list_push_front(&c, "a\n");
ft_list_push_front(&c, "b\n");
ft_list_print(c);
// ft_list_sort(&c, *ft_strcmp);
ft_list_print(c);
ft_list_remove_if(&c, "b\n", &ft_strcmp, &do_nothing);
ft_list_print(c);
t_list *l = NULL;
ft_list_push_front(&l, "Salut\n");
ft_list_print(l);
int test = ft_atoi_base("700chmod", "01234567");
printf("%d\n", test);
return 0;
}