/* Copyright 2011-2020 David Robillard Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "serd/serd.h" #include #include #include #include #include typedef struct { SerdNode name; SerdNode uri; } SerdPrefix; struct SerdEnvImpl { SerdPrefix* prefixes; size_t n_prefixes; SerdNode base_uri_node; SerdURI base_uri; }; SerdEnv* serd_env_new(const SerdNode* const base_uri) { SerdEnv* env = (SerdEnv*)calloc(1, sizeof(struct SerdEnvImpl)); if (env && base_uri) { serd_env_set_base_uri(env, base_uri); } return env; } void serd_env_free(SerdEnv* const env) { if (!env) { return; } for (size_t i = 0; i < env->n_prefixes; ++i) { serd_node_free(&env->prefixes[i].name); serd_node_free(&env->prefixes[i].uri); } free(env->prefixes); serd_node_free(&env->base_uri_node); free(env); } const SerdNode* serd_env_get_base_uri(const SerdEnv* const env, SerdURI* const out) { if (out) { *out = env->base_uri; } return &env->base_uri_node; } SerdStatus serd_env_set_base_uri(SerdEnv* const env, const SerdNode* const uri) { if (!env || (uri && uri->type != SERD_URI)) { return SERD_ERR_BAD_ARG; } if (!uri || !uri->buf) { serd_node_free(&env->base_uri_node); env->base_uri_node = SERD_NODE_NULL; env->base_uri = SERD_URI_NULL; return SERD_SUCCESS; } // Resolve base URI and create a new node and URI for it SerdURI base_uri; SerdNode base_uri_node = serd_node_new_uri_from_node(uri, &env->base_uri, &base_uri); // Replace the current base URI serd_node_free(&env->base_uri_node); env->base_uri_node = base_uri_node; env->base_uri = base_uri; return SERD_SUCCESS; } SERD_PURE_FUNC static SerdPrefix* serd_env_find(const SerdEnv* const env, const uint8_t* const name, const size_t name_len) { for (size_t i = 0; i < env->n_prefixes; ++i) { const SerdNode* const prefix_name = &env->prefixes[i].name; if (prefix_name->n_bytes == name_len) { if (!memcmp(prefix_name->buf, name, name_len)) { return &env->prefixes[i]; } } } return NULL; } static void serd_env_add(SerdEnv* const env, const SerdNode* const name, const SerdNode* const uri) { SerdPrefix* const prefix = serd_env_find(env, name->buf, name->n_bytes); if (prefix) { if (!serd_node_equals(&prefix->uri, uri)) { SerdNode old_prefix_uri = prefix->uri; prefix->uri = serd_node_copy(uri); serd_node_free(&old_prefix_uri); } } else { env->prefixes = (SerdPrefix*)realloc( env->prefixes, (++env->n_prefixes) * sizeof(SerdPrefix)); env->prefixes[env->n_prefixes - 1].name = serd_node_copy(name); env->prefixes[env->n_prefixes - 1].uri = serd_node_copy(uri); } } SerdStatus serd_env_set_prefix(SerdEnv* const env, const SerdNode* const name, const SerdNode* const uri) { if (!name->buf || uri->type != SERD_URI) { return SERD_ERR_BAD_ARG; } if (serd_uri_string_has_scheme(uri->buf)) { // Set prefix to absolute URI serd_env_add(env, name, uri); } else { // Resolve relative URI and create a new node and URI for it SerdURI abs_uri; SerdNode abs_uri_node = serd_node_new_uri_from_node(uri, &env->base_uri, &abs_uri); // Set prefix to resolved (absolute) URI serd_env_add(env, name, &abs_uri_node); serd_node_free(&abs_uri_node); } return SERD_SUCCESS; } SerdStatus serd_env_set_prefix_from_strings(SerdEnv* const env, const uint8_t* const name, const uint8_t* const uri) { const SerdNode name_node = serd_node_from_string(SERD_LITERAL, name); const SerdNode uri_node = serd_node_from_string(SERD_URI, uri); return serd_env_set_prefix(env, &name_node, &uri_node); } bool serd_env_qualify(const SerdEnv* const env, const SerdNode* const uri, SerdNode* const prefix, SerdChunk* const suffix) { for (size_t i = 0; i < env->n_prefixes; ++i) { const SerdNode* const prefix_uri = &env->prefixes[i].uri; if (uri->n_bytes >= prefix_uri->n_bytes) { if (!strncmp((const char*)uri->buf, (const char*)prefix_uri->buf, prefix_uri->n_bytes)) { *prefix = env->prefixes[i].name; suffix->buf = uri->buf + prefix_uri->n_bytes; suffix->len = uri->n_bytes - prefix_uri->n_bytes; return true; } } } return false; } SerdStatus serd_env_expand(const SerdEnv* const env, const SerdNode* const curie, SerdChunk* const uri_prefix, SerdChunk* const uri_suffix) { const uint8_t* const colon = (const uint8_t*)memchr(curie->buf, ':', curie->n_bytes + 1); if (curie->type != SERD_CURIE || !colon) { return SERD_ERR_BAD_ARG; } const size_t name_len = (size_t)(colon - curie->buf); const SerdPrefix* const prefix = serd_env_find(env, curie->buf, name_len); if (prefix) { uri_prefix->buf = prefix->uri.buf; uri_prefix->len = prefix->uri.n_bytes; uri_suffix->buf = colon + 1; uri_suffix->len = curie->n_bytes - name_len - 1; return SERD_SUCCESS; } return SERD_ERR_BAD_CURIE; } SerdNode serd_env_expand_node(const SerdEnv* const env, const SerdNode* const node) { switch (node->type) { case SERD_NOTHING: case SERD_LITERAL: break; case SERD_URI: { SerdURI ignored; return serd_node_new_uri_from_node(node, &env->base_uri, &ignored); } case SERD_CURIE: { SerdChunk prefix; SerdChunk suffix; if (serd_env_expand(env, node, &prefix, &suffix)) { return SERD_NODE_NULL; } const size_t len = prefix.len + suffix.len; uint8_t* buf = (uint8_t*)malloc(len + 1); SerdNode ret = {buf, len, 0, 0, SERD_URI}; snprintf((char*)buf, len + 1, "%s%s", prefix.buf, suffix.buf); ret.n_chars = serd_strlen(buf, NULL, NULL); return ret; } case SERD_BLANK: break; } return SERD_NODE_NULL; } void serd_env_foreach(const SerdEnv* const env, const SerdPrefixSink func, void* const handle) { for (size_t i = 0; i < env->n_prefixes; ++i) { func(handle, &env->prefixes[i].name, &env->prefixes[i].uri); } }