Mercurial > repos > blastem
view tern.c @ 504:7b0df1aaf384
Add support for left and right shift keys
author | Mike Pavone <pavone@retrodev.com> |
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date | Thu, 31 Oct 2013 01:00:32 -0700 |
parents | 51bf87f76d15 |
children | de6f00204fa2 |
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/* Copyright 2013 Michael Pavone This file is part of BlastEm. BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. */ #include "tern.h" #include <stddef.h> #include <stdlib.h> tern_node * tern_insert(tern_node * head, char * key, tern_val value) { tern_node ** cur = &head; while(*key) { if (*cur) { while(*cur && (*cur)->el != *key) { if (*key < (*cur)->el) { cur = &(*cur)->left; } else { cur = &(*cur)->right; } } } if (!*cur) { *cur = malloc(sizeof(tern_node)); (*cur)->left = NULL; (*cur)->right = NULL; (*cur)->straight.next = NULL; (*cur)->el = *key; } cur = &((*cur)->straight.next); key++; } while(*cur && (*cur)->el) { cur = &(*cur)->left; } if (!*cur) { *cur = malloc(sizeof(tern_node)); (*cur)->left = NULL; (*cur)->right = NULL; (*cur)->el = 0; } (*cur)->straight.value = value; return head; } int tern_find(tern_node * head, char * key, tern_val *ret) { tern_node * cur = head; while (cur) { if (cur->el == *key) { if (*key) { cur = cur->straight.next; key++; } else { *ret = cur->straight.value; return 1; } } else if (*key < cur->el) { cur = cur->left; } else { cur = cur->right; } } return 0; } tern_node * tern_find_prefix(tern_node * head, char * key) { tern_node * cur = head; while (cur && *key) { if (cur->el == *key) { cur = cur->straight.next; key++; } else if (*key < cur->el) { cur = cur->left; } else { cur = cur->right; } } return cur; } intptr_t tern_find_int(tern_node * head, char * key, intptr_t def) { tern_val ret; if (tern_find(head, key, &ret)) { return ret.intval; } return def; } tern_node * tern_insert_int(tern_node * head, char * key, intptr_t value) { tern_val val; val.intval = value; return tern_insert(head, key, val); } void * tern_find_ptr_default(tern_node * head, char * key, void * def) { tern_val ret; if (tern_find(head, key, &ret)) { return ret.ptrval; } return def; } void * tern_find_ptr(tern_node * head, char * key) { return tern_find_ptr_default(head, key, NULL); } tern_node * tern_insert_ptr(tern_node * head, char * key, void * value) { tern_val val; val.ptrval = value; return tern_insert(head, key, val); }