159 lines
2.8 KiB
C
159 lines
2.8 KiB
C
/*
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* tuple.c
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* management of key->value tuples
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*
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* Copyright (c) 2011, 2012 William Pitcock <nenolod@dereferenced.org>.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#include "pkg.h"
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#include "bsdstubs.h"
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static pkg_tuple_t *pkg_global_var;
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void
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pkg_tuple_add_global(const char *key, const char *value)
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{
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pkg_global_var = pkg_tuple_add(pkg_global_var, key, value);
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}
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char *
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pkg_tuple_find_global(const char *key)
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{
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pkg_tuple_t *node;
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PKG_FOREACH_LIST_ENTRY(pkg_global_var, node)
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{
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if (!strcasecmp(node->key, key))
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return node->value;
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}
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return NULL;
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}
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void
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pkg_tuple_free_global(void)
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{
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pkg_tuple_free(pkg_global_var);
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}
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void
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pkg_tuple_define_global(const char *kv)
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{
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char *workbuf = strdup(kv);
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char *value;
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value = strchr(workbuf, '=');
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if (value == NULL)
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goto out;
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*value++ = '\0';
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pkg_tuple_add_global(workbuf, value);
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out:
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free(workbuf);
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}
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pkg_tuple_t *
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pkg_tuple_add(pkg_tuple_t *parent, const char *key, const char *value)
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{
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pkg_tuple_t *tuple = calloc(sizeof(pkg_tuple_t), 1);
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tuple->key = strdup(key);
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tuple->value = pkg_tuple_parse(parent, value);
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tuple->next = parent;
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if (tuple->next != NULL)
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tuple->next->prev = tuple;
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return tuple;
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}
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char *
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pkg_tuple_find(pkg_tuple_t *head, const char *key)
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{
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pkg_tuple_t *node;
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char *res;
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if ((res = pkg_tuple_find_global(key)) != NULL)
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return res;
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PKG_FOREACH_LIST_ENTRY(head, node)
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{
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if (!strcasecmp(node->key, key))
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return node->value;
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}
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return NULL;
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}
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char *
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pkg_tuple_parse(pkg_tuple_t *vars, const char *value)
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{
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char buf[BUFSIZ];
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const char *ptr;
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char *bptr = buf;
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for (ptr = value; *ptr != '\0' && bptr - buf < BUFSIZ; ptr++)
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{
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if (*ptr != '$')
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*bptr++ = *ptr;
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else if (*(ptr + 1) == '{')
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{
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static char varname[BUFSIZ];
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char *vptr = varname;
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const char *pptr;
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char *kv, *parsekv;
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*vptr = '\0';
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for (pptr = ptr + 2; *pptr != '\0'; pptr++)
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{
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if (*pptr != '}')
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*vptr++ = *pptr;
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else
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{
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*vptr = '\0';
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break;
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}
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}
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ptr += (pptr - ptr);
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kv = pkg_tuple_find(vars, varname);
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if (kv != NULL)
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{
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parsekv = pkg_tuple_parse(vars, kv);
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strncpy(bptr, parsekv, BUFSIZ - (bptr - buf));
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bptr += strlen(parsekv);
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free(parsekv);
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}
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}
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}
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*bptr = '\0';
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return strdup(buf);
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}
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void
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pkg_tuple_free(pkg_tuple_t *head)
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{
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pkg_tuple_t *node, *next;
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PKG_FOREACH_LIST_ENTRY_SAFE(head, next, node)
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{
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free(node->key);
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free(node->value);
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free(node);
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}
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}
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