97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
#ifndef NNTPCHAN_MUSTACHE
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#define NNTPCHAN_MUSTACHE
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/*
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Author: José Bollo <jobol@nonadev.net>
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Author: José Bollo <jose.bollo@iot.bzh>
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https://gitlab.com/jobol/mustach
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#define MUSTACH_OK 0
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#define MUSTACH_ERROR_SYSTEM -1
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#define MUSTACH_ERROR_UNEXPECTED_END -2
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#define MUSTACH_ERROR_EMPTY_TAG -3
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#define MUSTACH_ERROR_TAG_TOO_LONG -4
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#define MUSTACH_ERROR_BAD_SEPARATORS -5
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#define MUSTACH_ERROR_TOO_DEPTH -6
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#define MUSTACH_ERROR_CLOSING -7
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#define MUSTACH_ERROR_BAD_UNESCAPE_TAG -8
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#include <cstdio>
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namespace nntpchan
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{
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namespace mustache
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{
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/**
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* mustach_itf - interface for callbacks
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*
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* All of this function should return a negative value to stop
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* the mustache processing. The returned negative value will be
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* then returned to the caller of mustach as is.
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*
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* The functions enter and next should return 0 or 1.
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*
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* All other functions should normally return 0.
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*
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* @start: Starts the mustach processing of the closure
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* 'start' is optional (can be NULL)
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*
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* @put: Writes the value of 'name' to 'file' with 'escape' or not
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*
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* @enter: Enters the section of 'name' if possible.
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* Musts return 1 if entered or 0 if not entered.
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* When 1 is returned, the function 'leave' will always be called.
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* Conversely 'leave' is never called when enter returns 0 or
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* a negative value.
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* When 1 is returned, the function must activate the first
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* item of the section.
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*
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* @next: Activates the next item of the section if it exists.
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* Musts return 1 when the next item is activated.
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* Musts return 0 when there is no item to activate.
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*
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* @leave: Leaves the last entered section
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*/
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struct mustach_itf {
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int (*start)(void *closure);
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int (*put)(void *closure, const char *name, int escape, FILE *file);
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int (*enter)(void *closure, const char *name);
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int (*next)(void *closure);
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int (*leave)(void *closure);
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};
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/**
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* fmustach - Renders the mustache 'template' in 'file' for 'itf' and 'closure'.
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*
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* @template: the template string to instanciate
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* @itf: the interface to the functions that mustach calls
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* @closure: the closure to pass to functions called
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* @file: the file where to write the result
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*
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* Returns 0 in case of success, -1 with errno set in case of system error
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* a other negative value in case of error.
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*/
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int fmustach(const char *templ, struct mustach_itf *itf, void *closure, FILE *file);
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}
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}
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#endif
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