Last change
on this file since 9398177 was
4c80a75,
checked in by Peter A. Buhr <pabuhr@…>, 6 years ago
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update evaluation programs
|
-
Property mode set to
100644
|
File size:
1.2 KB
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Rev | Line | |
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[604e76d] | 1 | #include <stdlib.h> |
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| 2 | #include "c-stack.h" |
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| 3 | |
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[ac4dad2] | 4 | typedef struct node { |
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[81e8ab0] | 5 | void * value; |
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[ac4dad2] | 6 | struct node * next; |
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| 7 | } node; |
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| 8 | |
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| 9 | void copy_stack( stack * s, const stack * t, void * (*copy)( const void * ) ) { |
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| 10 | node ** cr = &s->head; |
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| 11 | for ( node * nx = t->head; nx; nx = nx->next ) { |
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| 12 | *cr = malloc( sizeof(node) ); /***/ |
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| 13 | (*cr)->value = copy( nx->value ); |
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| 14 | cr = &(*cr)->next; |
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[604e76d] | 15 | } |
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[ac4dad2] | 16 | *cr = NULL; |
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[604e76d] | 17 | } |
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| 18 | |
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[ac4dad2] | 19 | void clear_stack( stack * s, void (* free_el)( void * ) ) { |
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| 20 | for ( node * nx = s->head; nx; ) { |
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| 21 | node * cr = nx; |
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| 22 | nx = cr->next; |
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| 23 | free_el( cr->value ); |
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| 24 | free( cr ); |
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[604e76d] | 25 | } |
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[ac4dad2] | 26 | s->head = NULL; |
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[604e76d] | 27 | } |
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[ac4dad2] | 28 | |
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[4c80a75] | 29 | stack new_stack() { |
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| 30 | return (stack){ NULL }; /***/ |
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| 31 | } |
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[ac4dad2] | 32 | |
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| 33 | stack * assign_stack( stack * s, const stack * t, |
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[8b001bd] | 34 | void * (*copy_el)( const void * ), void (*free_el)( void * ) ) { |
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[e59f0bf] | 35 | if ( s->head == t->head ) return s; |
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| 36 | clear_stack( s, free_el ); /***/ |
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| 37 | copy_stack( s, t, copy_el ); /***/ |
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| 38 | return s; |
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| 39 | } |
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[604e76d] | 40 | |
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[4c80a75] | 41 | _Bool stack_empty( const stack * s ) { |
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| 42 | return s->head == NULL; |
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| 43 | } |
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[604e76d] | 44 | |
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[ac4dad2] | 45 | void push_stack( stack * s, void * v ) { |
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| 46 | node * n = malloc( sizeof(node) ); /***/ |
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| 47 | *n = (node){ v, s->head }; /***/ |
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[604e76d] | 48 | s->head = n; |
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| 49 | } |
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| 50 | |
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[ac4dad2] | 51 | void * pop_stack( stack * s ) { |
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| 52 | node * n = s->head; |
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[604e76d] | 53 | s->head = n->next; |
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[81e8ab0] | 54 | void * v = n->value; |
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| 55 | free( n ); |
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| 56 | return v; |
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[604e76d] | 57 | } |
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