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editorconfig.c
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editorconfig.c
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/*
* Copyright (c) 2011-2012 EditorConfig Team
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "global.h"
#include "editorconfig.h"
#include "misc.h"
#include "ini.h"
#include "ec_glob.h"
/* could be used to fast locate these properties in an
* array_editorconfig_name_value */
typedef struct
{
const editorconfig_name_value* indent_style;
const editorconfig_name_value* indent_size;
const editorconfig_name_value* tab_width;
} special_property_name_value_pointers;
typedef struct
{
editorconfig_name_value* name_values;
int current_value_count;
int max_value_count;
special_property_name_value_pointers spnvp;
} array_editorconfig_name_value;
typedef struct
{
char* full_filename;
char* editorconfig_file_dir;
array_editorconfig_name_value array_name_value;
} handler_first_param;
/*
* Set the special pointers for a name
*/
static void set_special_property_name_value_pointers(
const editorconfig_name_value* nv,
special_property_name_value_pointers* spnvp)
{
/* set speical pointers */
if (!strcmp(nv->name, "indent_style"))
spnvp->indent_style = nv;
else if (!strcmp(nv->name, "indent_size"))
spnvp->indent_size = nv;
else if (!strcmp(nv->name, "tab_width"))
spnvp->tab_width = nv;
}
/*
* Set the name and value of a editorconfig_name_value structure
*/
static void set_name_value(editorconfig_name_value* nv, const char* name,
const char* value, special_property_name_value_pointers* spnvp)
{
if (name)
nv->name = strdup(name);
if (value)
nv->value = strdup(value);
/* lowercase the value when the name is one of the following */
if (!strcmp(nv->name, "end_of_line") ||
!strcmp(nv->name, "indent_style") ||
!strcmp(nv->name, "indent_size") ||
!strcmp(nv->name, "insert_final_newline") ||
!strcmp(nv->name, "trim_trailing_whitespace") ||
!strcmp(nv->name, "charset"))
strlwr(nv->value);
/* set special pointers */
set_special_property_name_value_pointers(nv, spnvp);
}
/*
* reset special property name value pointers
*/
static void reset_special_property_name_value_pointers(
array_editorconfig_name_value* aenv)
{
int i;
for (i = 0; i < aenv->current_value_count; ++ i)
set_special_property_name_value_pointers(
&aenv->name_values[i], &aenv->spnvp);
}
/*
* Find the editorconfig_name_value from name in a editorconfig_name_value
* array.
*/
static int find_name_value_from_name(const editorconfig_name_value* env,
int count, const char* name)
{
int i;
for (i = 0; i < count; ++i)
if (!strcmp(env[i].name, name)) /* found */
return i;
return -1;
}
/* initialize array_editorconfig_name_value */
static void array_editorconfig_name_value_init(
array_editorconfig_name_value* aenv)
{
memset(aenv, 0, sizeof(array_editorconfig_name_value));
}
static int array_editorconfig_name_value_add(
array_editorconfig_name_value* aenv,
const char* name, const char* value)
{
#define VALUE_COUNT_INITIAL 30
#define VALUE_COUNT_INCREASEMENT 10
int name_value_pos;
/* always use name_lwr but not name, since property names are case
* insensitive */
char name_lwr[MAX_PROPERTY_NAME];
/* For the first time we came here, aenv->name_values is NULL */
if (aenv->name_values == NULL) {
aenv->name_values = (editorconfig_name_value*)malloc(
sizeof(editorconfig_name_value) * VALUE_COUNT_INITIAL);
if (aenv->name_values == NULL)
return -1;
aenv->max_value_count = VALUE_COUNT_INITIAL;
aenv->current_value_count = 0;
}
/* name_lwr is the lowercase property name */
strlwr(strcpy(name_lwr, name));
name_value_pos = find_name_value_from_name(
aenv->name_values, aenv->current_value_count, name_lwr);
if (name_value_pos >= 0) { /* current name has already been used */
free(aenv->name_values[name_value_pos].value);
set_name_value(&aenv->name_values[name_value_pos],
(const char*)NULL, value, &aenv->spnvp);
return 0;
}
/* if the space is not enough, allocate more before add the new name and
* value */
if (aenv->current_value_count >= aenv->max_value_count) {
editorconfig_name_value* new_values;
int new_max_value_count;
new_max_value_count = aenv->current_value_count +
VALUE_COUNT_INCREASEMENT;
new_values = (editorconfig_name_value*)realloc(aenv->name_values,
sizeof(editorconfig_name_value) * new_max_value_count);
if (new_values == NULL) /* error occured */
return -1;
aenv->name_values = new_values;
aenv->max_value_count = new_max_value_count;
/* reset special pointers */
reset_special_property_name_value_pointers(aenv);
}
set_name_value(&aenv->name_values[aenv->current_value_count],
name_lwr, value, &aenv->spnvp);
++ aenv->current_value_count;
return 0;
#undef VALUE_COUNT_INITIAL
#undef VALUE_COUNT_INCREASEMENT
}
static void array_editorconfig_name_value_clear(
array_editorconfig_name_value* aenv)
{
int i;
for (i = 0; i < aenv->current_value_count; ++i) {
free(aenv->name_values[i].name);
free(aenv->name_values[i].value);
}
free(aenv->name_values);
}
/*
* Accept INI property value and store known values in handler_first_param
* struct.
*/
static int ini_handler(void* hfp, const char* section, const char* name,
const char* value)
{
handler_first_param* hfparam = (handler_first_param*)hfp;
/* prepend ** to pattern */
char* pattern;
/* root = true, clear all previous values */
if (*section == '\0' && !strcasecmp(name, "root") &&
!strcasecmp(value, "true")) {
array_editorconfig_name_value_clear(&hfparam->array_name_value);
array_editorconfig_name_value_init(&hfparam->array_name_value);
return 1;
}
/* Pattern would be: /dir/of/editorconfig/file[double_star]/[section] if
* section does not contain '/', or /dir/of/editorconfig/file[section]
* if section starts with a '/', or /dir/of/editorconfig/file/[section] if
* section contains '/' but does not start with '/'.
*
* If the dir part has any special characters as defined by ec_glob.c, we
* need to escape them.
*/
pattern = (char*)malloc(
/* The 2 here is for possible escaping. */
strlen(hfparam->editorconfig_file_dir) * sizeof(char) * 2 +
sizeof("**/") + strlen(section) * sizeof(char));
if (!pattern)
return 0;
/* Escaping special characters in the directory part. */
char* ptr = hfparam->editorconfig_file_dir;
char* ptr_prev = ptr;
char* ptr_pattern = pattern;
for (; (ptr = strpbrk(ptr, ec_special_chars)) != NULL; ++ ptr, ptr_prev = ptr)
{
ptrdiff_t s = ptr - ptr_prev;
memcpy(ptr_pattern, ptr_prev, s * sizeof(char));
ptr_pattern += s;
*(ptr_pattern ++) = '\\'; /* escaping char */
*(ptr_pattern ++) = *ptr;
}
strcpy(ptr_pattern, ptr_prev);
if (strchr(section, '/') == NULL) /* No / is found, append '[star][star]/' */
strcat(pattern, "**/");
else if (*section != '/') /* The first char is not '/' but section contains
'/', append a '/' */
strcat(pattern, "/");
strcat(pattern, section);
if (ec_glob(pattern, hfparam->full_filename) == 0) {
if (array_editorconfig_name_value_add(&hfparam->array_name_value, name,
value)) {
free(pattern);
return 0;
}
}
free(pattern);
return 1;
}
/*
* Split an absolute file path into directory and filename parts.
*
* If absolute_path does not contain a path separator, set directory and
* filename to NULL pointers.
*/
static void split_file_path(char** directory, char** filename,
const char* absolute_path)
{
char* path_char = strrchr(absolute_path, '/');
if (path_char == NULL) {
if (directory)
*directory = NULL;
if (filename)
*filename = NULL;
return;
}
if (directory != NULL) {
*directory = strndup(absolute_path,
(size_t)(path_char - absolute_path));
}
if (filename != NULL) {
*filename = strndup(path_char+1, strlen(path_char)-1);
}
}
/*
* Return the number of slashes in given filename
*/
static int count_slashes(const char* filename)
{
int slash_count;
for (slash_count = 0; *filename != '\0'; filename++) {
if (*filename == '/') {
slash_count++;
}
}
return slash_count;
}
/*
* Return an array of full filenames for files in every directory in and above
* the given path with the name of the relative filename given.
*/
static char** get_filenames(const char* path, const char* filename)
{
char* currdir;
char* currdir1;
char** files;
int slashes = count_slashes(path);
int i;
files = (char**) calloc(slashes+1, sizeof(char*));
currdir = strdup(path);
for (i = slashes - 1; i >= 0; --i) {
currdir1 = currdir;
split_file_path(&currdir, NULL, currdir1);
free(currdir1);
files[i] = malloc(strlen(currdir) + strlen(filename) + 2);
strcpy(files[i], currdir);
strcat(files[i], "/");
strcat(files[i], filename);
}
free(currdir);
files[slashes] = NULL;
return files;
}
/*
* version number comparison
*/
static int editorconfig_compare_version(
const struct editorconfig_version* v0,
const struct editorconfig_version* v1)
{
/* compare major */
if (v0->major > v1->major)
return 1;
else if (v0->major < v1->major)
return -1;
/* compare minor */
if (v0->minor > v1->minor)
return 1;
else if (v0->minor < v1->minor)
return -1;
/* compare patch */
if (v0->patch > v1->patch)
return 1;
else if (v0->patch < v1->patch)
return -1;
return 0;
}
EDITORCONFIG_EXPORT
const char* editorconfig_get_error_msg(int err_num)
{
if(err_num > 0)
return "Failed to parse file.";
switch(err_num) {
case 0:
return "No error occurred.";
case EDITORCONFIG_PARSE_NOT_FULL_PATH:
return "Input file must be a full path name.";
case EDITORCONFIG_PARSE_MEMORY_ERROR:
return "Memory error.";
case EDITORCONFIG_PARSE_VERSION_TOO_NEW:
return "Required version is greater than the current version.";
}
return "Unknown error.";
}
/*
* See the header file for the use of this function
*/
EDITORCONFIG_EXPORT
int editorconfig_parse(const char* full_filename, editorconfig_handle h)
{
handler_first_param hfp;
char** config_file;
char** config_files;
int err_num;
int i;
struct editorconfig_handle* eh = (struct editorconfig_handle*)h;
struct editorconfig_version cur_ver;
struct editorconfig_version tmp_ver;
/* get current version */
editorconfig_get_version(&cur_ver.major, &cur_ver.minor,
&cur_ver.patch);
/* if version is set to 0.0.0, we set it to current version */
if (eh->ver.major == 0 &&
eh->ver.minor == 0 &&
eh->ver.patch == 0)
eh->ver = cur_ver;
if (editorconfig_compare_version(&eh->ver, &cur_ver) > 0)
return EDITORCONFIG_PARSE_VERSION_TOO_NEW;
if (eh->err_file) {
free(eh->err_file);
eh->err_file = NULL;
}
/* if eh->conf_file_name is NULL, we set ".editorconfig" as the default
* conf file name */
if (!eh->conf_file_name)
eh->conf_file_name = ".editorconfig";
if (eh->name_values) {
/* free name_values */
for (i = 0; i < eh->name_value_count; ++i) {
free(eh->name_values[i].name);
free(eh->name_values[i].value);
}
free(eh->name_values);
eh->name_values = NULL;
eh->name_value_count = 0;
}
memset(&hfp, 0, sizeof(hfp));
hfp.full_filename = strdup(full_filename);
/* return an error if file path is not absolute */
if (!is_file_path_absolute(full_filename)) {
return EDITORCONFIG_PARSE_NOT_FULL_PATH;
}
#ifdef WIN32
/* replace all backslashes with slashes on Windows */
str_replace(hfp.full_filename, '\\', '/');
#endif
array_editorconfig_name_value_init(&hfp.array_name_value);
config_files = get_filenames(hfp.full_filename, eh->conf_file_name);
for (config_file = config_files; *config_file != NULL; config_file++) {
split_file_path(&hfp.editorconfig_file_dir, NULL, *config_file);
if ((err_num = ini_parse(*config_file, ini_handler, &hfp)) != 0 &&
/* ignore error caused by I/O, maybe caused by non exist file */
err_num != -1) {
eh->err_file = strdup(*config_file);
free(*config_file);
free(hfp.full_filename);
free(hfp.editorconfig_file_dir);
return err_num;
}
free(hfp.editorconfig_file_dir);
free(*config_file);
}
/* value proprocessing */
/* For v0.9 */
SET_EDITORCONFIG_VERSION(&tmp_ver, 0, 9, 0);
if (editorconfig_compare_version(&eh->ver, &tmp_ver) >= 0) {
/* Set indent_size to "tab" if indent_size is not specified and
* indent_style is set to "tab". Only should be done after v0.9 */
if (hfp.array_name_value.spnvp.indent_style &&
!hfp.array_name_value.spnvp.indent_size &&
!strcmp(hfp.array_name_value.spnvp.indent_style->value, "tab"))
array_editorconfig_name_value_add(&hfp.array_name_value,
"indent_size", "tab");
/* Set indent_size to tab_width if indent_size is "tab" and tab_width is
* specified. This behavior is specified for v0.9 and up. */
if (hfp.array_name_value.spnvp.indent_size &&
hfp.array_name_value.spnvp.tab_width &&
!strcmp(hfp.array_name_value.spnvp.indent_size->value, "tab"))
array_editorconfig_name_value_add(&hfp.array_name_value, "indent_size",
hfp.array_name_value.spnvp.tab_width->value);
}
/* Set tab_width to indent_size if indent_size is specified. If version is
* not less than 0.9.0, we also need to check when the indent_size is set
* to "tab", we should not duplicate the value to tab_width */
if (hfp.array_name_value.spnvp.indent_size &&
!hfp.array_name_value.spnvp.tab_width &&
(editorconfig_compare_version(&eh->ver, &tmp_ver) < 0 ||
strcmp(hfp.array_name_value.spnvp.indent_size->value, "tab")))
array_editorconfig_name_value_add(&hfp.array_name_value, "tab_width",
hfp.array_name_value.spnvp.indent_size->value);
eh->name_value_count = hfp.array_name_value.current_value_count;
if (eh->name_value_count == 0) { /* no value is set, just return 0. */
free(hfp.full_filename);
free(config_files);
return 0;
}
eh->name_values = hfp.array_name_value.name_values;
eh->name_values = realloc( /* realloc to truncate the unused spaces */
eh->name_values,
sizeof(editorconfig_name_value) * eh->name_value_count);
if (eh->name_values == NULL) {
free(hfp.full_filename);
return EDITORCONFIG_PARSE_MEMORY_ERROR;
}
free(hfp.full_filename);
free(config_files);
return 0;
}
/*
* See header file
*/
EDITORCONFIG_EXPORT
void editorconfig_get_version(int* major, int* minor, int* patch)
{
if (major)
*major = EC_VERSION_MAJOR;
if (minor)
*minor = EC_VERSION_MINOR;
if (patch)
*patch = EC_VERSION_PATCH;
}
/*
* See header file
*/
EDITORCONFIG_EXPORT
const char* editorconfig_get_version_suffix(void)
{
return EC_VERSION_SUFFIX;
}