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Diffstat (limited to 'third-party/mustach')
| -rw-r--r-- | third-party/mustach/AUTHORS | 15 | ||||
| -rw-r--r-- | third-party/mustach/LICENSE-2.0.txt | 202 | ||||
| -rw-r--r-- | third-party/mustach/README.md | 117 | ||||
| -rw-r--r-- | third-party/mustach/mustach.c | 327 | ||||
| -rw-r--r-- | third-party/mustach/mustach.h | 120 |
5 files changed, 781 insertions, 0 deletions
diff --git a/third-party/mustach/AUTHORS b/third-party/mustach/AUTHORS new file mode 100644 index 0000000..82d2fee --- /dev/null +++ b/third-party/mustach/AUTHORS @@ -0,0 +1,15 @@ +Main author: + José Bollo <jobol@nonadev.net> + +Contributors: + Harold L Marzan + Atlas + Sami Kerola + Tomasz Sieprawski + Lailton Fernando Mariano + +Thanks to issue submitters: + Thierry Fournier + Dante Torres + Mark Bucciarelli + Paul Wisehart diff --git a/third-party/mustach/LICENSE-2.0.txt b/third-party/mustach/LICENSE-2.0.txt new file mode 100644 index 0000000..d645695 --- /dev/null +++ b/third-party/mustach/LICENSE-2.0.txt @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/third-party/mustach/README.md b/third-party/mustach/README.md new file mode 100644 index 0000000..026fc87 --- /dev/null +++ b/third-party/mustach/README.md @@ -0,0 +1,117 @@ +Introduction to Mustach +======================= + +`mustach` is a C implementation of the [mustache](http://mustache.github.io "main site for mustache") template library. + +The main site for `mustach` is on [gitlab](https://gitlab.com/jobol/mustach). + +The best way to use mustach is to copy the files **mustach.h** and **mustach.c** +directly into your project and use it. + +The current source files are: + +- **mustach.c** core implementation of mustache in C +- **mustach.h** header file for core definitions +- **mustach-json-c.c** tiny json wrapper of mustach using [json-c](https://github.com/json-c/json-c) +- **mustach-json-c.h** header file for using the tiny JSON wrapper +- **mustach-tool.c** simple tool for applying template files to a JSON file + +The file **mustach-json-c.c** is the main example of use of **mustach** core +and it is also a practical implementation that can be used. It uses the library +json-c. (NOTE for Mac OS: available through homebrew). + +HELP REQUESTED TO GIVE EXAMPLE BASED ON OTHER LIBRARIES (ex: janson, ...). + +The tool **mustach** is build using `make`, its usage is: + + mustach json template [template]... + +It then outputs the result of applying the templates files to the JSON file. + +Portability +=========== + +Some system does not provide *open_memstream*. In that case, tell your +prefered compiler to declare the preprocessor symbol **NO_OPEN_MEMSTREAM**. +Example: + + gcc -DNO_OPEN_MEMSTREAM + +Extensions +========== + +By default, the current implementation provides the following extensions: + +Explicit Substitution +--------------------- + +This is a core extension implemented in file **mustach.c**. + +In somecases the name of the key used for substition begins with a +character reserved for mustach: one of '#', '^', '/', '&', '{', '>' and '='. +This extension introduces the special character ':' to explicitly +tell mustach to just substitute the value. So ':' becomes a new special +character. + +Value Testing +------------- + +This is a tool extension implmented in file **mustach-json-c.c**. + +This extension allows you to test the value of the selected key. +It is allowed to write key=value (matching test) or key=!value +(not matching test) in any query. + +Removing Extensions +------------------- + +When compiling mustach.c or mustach-json-c.c, +extensions can be removed by defining macros +using option -D. + +The possible macros are: + +- `NO_COLON_EXTENSION_FOR_MUSTACH` + + This macro remove the ability to use colon (:) + as explicit command for variable substituion. + This extension allows to have name starting + with one of the mustach character :#^/&{=< + +- `NO_EQUAL_VALUE_EXTENSION_FOR_MUSTACH` + + This macro allows the program to check the whether + the actual value is equal to an expected value. + This is useful in `{{#key=val}}` or `{{^key=val}}` + with the corresponding `{{/key=val}}`. + It can also be used in `{{key=val}}` but this + doesn't seem to be useful. + +- `NO_JSON_POINTER_EXTENSION_FOR_MUSTACH` + + This macro removes the possible use of JSON pointers. + JSON pointers are defined in IETF RFC 6901. + If not set, any key starting with "/" is a JSON pointer. + This implies to use the colon to introduce keys. + So `NO_COLON_EXTENSION_FOR_MUSTACH` implies + `NO_JSON_POINTER_EXTENSION_FOR_MUSTACH`. + A special escaping is used for "=" signs when + values comparison is enabled: "~=" leaves "=" in the key. + +- `NO_ALLOW_EMPTY_TAG` + + Generate the error MUSTACH_ERROR_EMPTY_TAG automatically. + +- NO_OBJECT_ITERATION_FOR_MUSTACH + + Disable the object iteration extension. That extension allows + to iterate over the keys of an object. The iteration on object + is selected by using the selector `{{#key.*}}`. In the context + of iterating over object keys, the single key `{{*}}` returns the + key and `{{.}}` returns the value. + +- `NO_EXTENSION_FOR_MUSTACH` + + This macro disables any current or future + extensions. + diff --git a/third-party/mustach/mustach.c b/third-party/mustach/mustach.c new file mode 100644 index 0000000..830e72c --- /dev/null +++ b/third-party/mustach/mustach.c @@ -0,0 +1,327 @@ +/* + Author: José Bollo <jobol@nonadev.net> + Author: José Bollo <jose.bollo@iot.bzh> + + https://gitlab.com/jobol/mustach + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +#define _GNU_SOURCE + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <ctype.h> + +#include "mustach.h" + +#define NAME_LENGTH_MAX 1024 +#define DEPTH_MAX 256 + +#if !defined(NO_OPEN_MEMSTREAM) +static FILE *memfile_open(char **buffer, size_t *size) +{ + return open_memstream(buffer, size); +} +static void memfile_abort(FILE *file, char **buffer, size_t *size) +{ + fclose(file); + free(*buffer); + *buffer = NULL; + *size = 0; +} +static int memfile_close(FILE *file, char **buffer, size_t *size) +{ + int rc; + + /* adds terminating null */ + rc = fputc(0, file) ? MUSTACH_ERROR_SYSTEM : 0; + fclose(file); + if (rc == 0) + /* removes terminating null of the length */ + (*size)--; + else { + free(*buffer); + *buffer = NULL; + *size = 0; + } + return rc; +} +#else +static FILE *memfile_open(char **buffer, size_t *size) +{ + return tmpfile(); +} +static void memfile_abort(FILE *file, char **buffer, size_t *size) +{ + fclose(file); + *buffer = NULL; + *size = 0; +} +static int memfile_close(FILE *file, char **buffer, size_t *size) +{ + int rc; + size_t s; + char *b; + + s = (size_t)ftell(file); + b = malloc(s + 1); + if (b == NULL) { + rc = MUSTACH_ERROR_SYSTEM; + errno = ENOMEM; + s = 0; + } else { + rewind(file); + if (1 == fread(b, s, 1, file)) { + rc = 0; + b[s] = 0; + } else { + rc = MUSTACH_ERROR_SYSTEM; + free(b); + b = NULL; + s = 0; + } + } + *buffer = b; + *size = s; + return rc; +} +#endif + +static int getpartial(struct mustach_itf *itf, void *closure, const char *name, char **result) +{ + int rc; + FILE *file; + size_t size; + + *result = NULL; + file = memfile_open(result, &size); + if (file == NULL) + rc = MUSTACH_ERROR_SYSTEM; + else { + rc = itf->put(closure, name, 0, file); + if (rc < 0) + memfile_abort(file, result, &size); + else + rc = memfile_close(file, result, &size); + } + return rc; +} + +static int process(const char *template, struct mustach_itf *itf, void *closure, FILE *file, const char *opstr, const char *clstr) +{ + char name[NAME_LENGTH_MAX + 1], *partial, c, *tmp; + const char *beg, *term; + struct { const char *name, *again; size_t length; int emit, entered; } stack[DEPTH_MAX]; + size_t oplen, cllen, len, l; + int depth, rc, emit; + + emit = 1; + oplen = strlen(opstr); + cllen = strlen(clstr); + depth = 0; + for(;;) { + beg = strstr(template, opstr); + if (beg == NULL) { + /* no more mustach */ + if (emit) + fwrite(template, strlen(template), 1, file); + return depth ? MUSTACH_ERROR_UNEXPECTED_END : 0; + } + if (emit) + fwrite(template, (size_t)(beg - template), 1, file); + beg += oplen; + term = strstr(beg, clstr); + if (term == NULL) + return MUSTACH_ERROR_UNEXPECTED_END; + template = term + cllen; + len = (size_t)(term - beg); + c = *beg; + switch(c) { + case '!': + case '=': + break; + case '{': + for (l = 0 ; clstr[l] == '}' ; l++); + if (clstr[l]) { + if (!len || beg[len-1] != '}') + return MUSTACH_ERROR_BAD_UNESCAPE_TAG; + len--; + } else { + if (term[l] != '}') + return MUSTACH_ERROR_BAD_UNESCAPE_TAG; + template++; + } + c = '&'; + /*@fallthrough@*/ + case '^': + case '#': + case '/': + case '&': + case '>': +#if !defined(NO_EXTENSION_FOR_MUSTACH) && !defined(NO_COLON_EXTENSION_FOR_MUSTACH) + case ':': +#endif + beg++; len--; + default: + while (len && isspace(beg[0])) { beg++; len--; } + while (len && isspace(beg[len-1])) len--; +#if defined(NO_EXTENSION_FOR_MUSTACH) || defined(NO_ALLOW_EMPTY_TAG) + if (len == 0) + return MUSTACH_ERROR_EMPTY_TAG; +#endif + if (len > NAME_LENGTH_MAX) + return MUSTACH_ERROR_TAG_TOO_LONG; + memcpy(name, beg, len); + name[len] = 0; + break; + } + switch(c) { + case '!': + /* comment */ + /* nothing to do */ + break; + case '=': + /* defines separators */ + if (len < 5 || beg[len - 1] != '=') + return MUSTACH_ERROR_BAD_SEPARATORS; + beg++; + len -= 2; + for (l = 0; l < len && !isspace(beg[l]) ; l++); + if (l == len) + return MUSTACH_ERROR_BAD_SEPARATORS; + oplen = l; + tmp = alloca(oplen + 1); + memcpy(tmp, beg, oplen); + tmp[oplen] = 0; + opstr = tmp; + while (l < len && isspace(beg[l])) l++; + if (l == len) + return MUSTACH_ERROR_BAD_SEPARATORS; + cllen = len - l; + tmp = alloca(cllen + 1); + memcpy(tmp, beg + l, cllen); + tmp[cllen] = 0; + clstr = tmp; + break; + case '^': + case '#': + /* begin section */ + if (depth == DEPTH_MAX) + return MUSTACH_ERROR_TOO_DEEP; + rc = emit; + if (rc) { + rc = itf->enter(closure, name); + if (rc < 0) + return rc; + } + + if (template[0] == '\n') + ++template; + + stack[depth].name = beg; + stack[depth].again = template; + stack[depth].length = len; + stack[depth].emit = emit; + stack[depth].entered = rc; + if ((c == '#') == (rc == 0)) + emit = 0; + depth++; + break; + case '/': + /* end section */ + if (depth-- == 0 || len != stack[depth].length || memcmp(stack[depth].name, name, len)) + return MUSTACH_ERROR_CLOSING; + rc = emit && stack[depth].entered ? itf->next(closure) : 0; + if (rc < 0) + return rc; + if (rc) { + template = stack[depth++].again; + } else { + emit = stack[depth].emit; + if (emit && stack[depth].entered) + itf->leave(closure); + } + break; + case '>': + /* partials */ + if (emit) { + rc = getpartial(itf, closure, name, &partial); + if (rc == 0) { + rc = process(partial, itf, closure, file, opstr, clstr); + free(partial); + } + if (rc < 0) + return rc; + } + break; + default: + /* replacement */ + if (emit) { + rc = itf->put(closure, name, c != '&', file); + if (rc < 0) + return rc; + } + break; + } + } +} + +int fmustach(const char *template, struct mustach_itf *itf, void *closure, FILE *file) +{ + int rc = itf->start ? itf->start(closure) : 0; + if (rc == 0) + rc = process(template, itf, closure, file, "{{", "}}"); + return rc; +} + +int fdmustach(const char *template, struct mustach_itf *itf, void *closure, int fd) +{ + int rc; + FILE *file; + + file = fdopen(fd, "w"); + if (file == NULL) { + rc = MUSTACH_ERROR_SYSTEM; + errno = ENOMEM; + } else { + rc = fmustach(template, itf, closure, file); + fclose(file); + } + return rc; +} + +int mustach(const char *template, struct mustach_itf *itf, void *closure, char **result, size_t *size) +{ + int rc; + FILE *file; + size_t s; + + *result = NULL; + if (size == NULL) + size = &s; + file = memfile_open(result, size); + if (file == NULL) + rc = MUSTACH_ERROR_SYSTEM; + else { + rc = fmustach(template, itf, closure, file); + if (rc < 0) + memfile_abort(file, result, size); + else + rc = memfile_close(file, result, size); + } + return rc; +} + diff --git a/third-party/mustach/mustach.h b/third-party/mustach/mustach.h new file mode 100644 index 0000000..32288a1 --- /dev/null +++ b/third-party/mustach/mustach.h @@ -0,0 +1,120 @@ +/* + Author: José Bollo <jobol@nonadev.net> + Author: José Bollo <jose.bollo@iot.bzh> + + https://gitlab.com/jobol/mustach + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +#ifndef _mustach_h_included_ +#define _mustach_h_included_ + +/** + * mustach_itf - interface for callbacks + * + * All of this function should return a negative value to stop + * the mustache processing. The returned negative value will be + * then returned to the caller of mustach as is. + * + * The functions enter and next should return 0 or 1. + * + * All other functions should normally return 0. If it returns + * a negative value, it means an error that stop the process + * and that is reported to the caller. + * + * @start: Starts the mustach processing of the closure + * 'start' is optional (can be NULL) + * + * @put: Writes the value of 'name' to 'file' with 'escape' or not + * As an extension (see NO_ALLOW_EMPTY_TAG), the 'name' can be + * the empty string. In that later case an implemntation can + * return MUSTACH_ERROR_EMPTY_TAG to refuse empty names. + * + * @enter: Enters the section of 'name' if possible. + * Musts return 1 if entered or 0 if not entered. + * When 1 is returned, the function 'leave' will always be called. + * Conversely 'leave' is never called when enter returns 0 or + * a negative value. + * When 1 is returned, the function must activate the first + * item of the section. + * + * @next: Activates the next item of the section if it exists. + * Musts return 1 when the next item is activated. + * Musts return 0 when there is no item to activate. + * + * @leave: Leaves the last entered section + */ +struct mustach_itf { + int (*start)(void *closure); + int (*put)(void *closure, const char *name, int escape, FILE *file); + int (*enter)(void *closure, const char *name); + int (*next)(void *closure); + int (*leave)(void *closure); +}; + +#define MUSTACH_OK 0 +#define MUSTACH_ERROR_SYSTEM -1 +#define MUSTACH_ERROR_UNEXPECTED_END -2 +#define MUSTACH_ERROR_EMPTY_TAG -3 +#define MUSTACH_ERROR_TAG_TOO_LONG -4 +#define MUSTACH_ERROR_BAD_SEPARATORS -5 +#define MUSTACH_ERROR_TOO_DEEP -6 +#define MUSTACH_ERROR_CLOSING -7 +#define MUSTACH_ERROR_BAD_UNESCAPE_TAG -8 + +/* compatibility with older bad name */ +#define MUSTACH_ERROR_TOO_DEPTH MUSTACH_ERROR_TOO_DEEP + +/** + * fmustach - Renders the mustache 'template' in 'file' for 'itf' and 'closure'. + * + * @template: the template string to instanciate + * @itf: the interface to the functions that mustach calls + * @closure: the closure to pass to functions called + * @file: the file where to write the result + * + * Returns 0 in case of success, -1 with errno set in case of system error + * a other negative value in case of error. + */ +extern int fmustach(const char *template, struct mustach_itf *itf, void *closure, FILE *file); + +/** + * fmustach - Renders the mustache 'template' in 'fd' for 'itf' and 'closure'. + * + * @template: the template string to instanciate + * @itf: the interface to the functions that mustach calls + * @closure: the closure to pass to functions called + * @fd: the file descriptor number where to write the result + * + * Returns 0 in case of success, -1 with errno set in case of system error + * a other negative value in case of error. + */ +extern int fdmustach(const char *template, struct mustach_itf *itf, void *closure, int fd); + +/** + * fmustach - Renders the mustache 'template' in 'result' for 'itf' and 'closure'. + * + * @template: the template string to instanciate + * @itf: the interface to the functions that mustach calls + * @closure: the closure to pass to functions called + * @result: the pointer receiving the result when 0 is returned + * @size: the size of the returned result + * + * Returns 0 in case of success, -1 with errno set in case of system error + * a other negative value in case of error. + */ +extern int mustach(const char *template, struct mustach_itf *itf, void *closure, char **result, size_t *size); + +#endif + |