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opcode_functions3.c
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opcode_functions3.c
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#include "monty.h"
/**
** mod - get the result of module between two elements
* @stack: head of the stack
* @line_number: number of current line
*/
void mod(stack_t **stack, unsigned int line_number)
{
(void)line_number;
if (!(*stack) || !(*stack)->next)
exit(error_msg(7));
if ((*stack)->n == 0)
exit(error_msg(8));
(*stack)->next->n = (*stack)->next->n % (*stack)->n;
pop(stack, line_number);
}
/**
** pchar - get the character at an elelement
* @stack: head of the stack
* @line_number: number of current line
*/
void pchar(stack_t **stack, unsigned int line_number)
{
(void)line_number;
if (!(*stack))
exit(error_msg(5));
if ((*stack)->n < 0 || (*stack)->n > 127)
exit(error_msg(9));
printf("%c\n", (char)(*stack)->n);
}
/**
** pstr - print the string started at the top of the stack
* @stack: head of the stack
* @line_number: number of current line
*/
void pstr(stack_t **stack, unsigned int line_number)
{
stack_t *current_node = *stack;
(void)line_number;
while (current_node)
{
if (current_node->n == 0)
break;
if (current_node->n < 0 || current_node->n > 127)
break;
putchar(current_node->n);
current_node = current_node->next;
}
putchar('\n');
}
/**
** rotl - change head of the stack at the end
* @stack: head of the stack
* @line_number: number of current line
*/
void rotl(stack_t **stack, unsigned int line_number)
{
stack_t *tail = *stack;
(void)line_number;
if (*stack == NULL || (*stack)->next == NULL)
return;
while (tail->next)
tail = tail->next;
tail->next = *stack;
tail->next->prev = tail;
*stack = (*stack)->next;
tail->next->next = NULL;
(*stack)->prev = NULL;
}
/**
** rotr - reverse the elements in a stack
* @stack: head of the stack
* @line_number: number of current line
*/
void rotr(stack_t **stack, unsigned int line_number)
{
stack_t *tail;
(void)line_number;
if (*stack == NULL || (*stack)->next == NULL)
return;
tail = *stack;
while (tail->next)
tail = tail->next;
tail->prev->next = tail->next;
tail->next = *stack;
tail->prev = (*stack)->prev;
(*stack)->prev = tail;
*stack = tail;
}