openmv/src/omv/common/ini.c
2023-10-15 17:51:35 +02:00

527 lines
16 KiB
C

/*
* This file is part of the OpenMV project.
*
* Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
* Copyright (c) 2013-2021 Kwabena W. Agyeman <kwagyeman@openmv.io>
*
* This work is licensed under the MIT license, see the file LICENSE for details.
*
* Initialization file parser.
*/
#include <stddef.h>
#include <stdbool.h>
#include <string.h>
#include "ini.h"
#include "file_utils.h"
/*-------------------------------------------------------------------------
_isppace.c - part of ctype.h
Written By - Sandeep Dutta . sandeep.dutta@usa.net (1999)
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; if not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding!
-------------------------------------------------------------------------*/
char ini_isspace(unsigned char c) {
if (c == ' '
|| c == '\f'
|| c == '\n'
|| c == '\r'
|| c == '\t'
|| c == '\v') {
return 1;
}
return 0;
}
/*
* atoi.c --
*
* Source code for the "atoi" library procedure.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
/*
*----------------------------------------------------------------------
*
* atoi --
*
* Convert an ASCII string into an integer.
*
* Results:
* The return value is the integer equivalent of string. If there
* are no decimal digits in string, then 0 is returned.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
ini_atoi(string)
const char *string; /* String of ASCII digits, possibly
* preceded by white space. For bases
* greater than 10, either lower- or
* upper-case digits may be used.
*/
{
register int result = 0;
register unsigned int digit;
int sign;
/*
* Skip any leading blanks.
*/
while (ini_isspace(*string)) {
string += 1;
}
/*
* Check for a sign.
*/
if (*string == '-') {
sign = 1;
string += 1;
} else {
sign = 0;
if (*string == '+') {
string += 1;
}
}
for (; *string; string++) {
digit = *string - '0';
if ((digit < 0) || (digit > 9)) {
break;
}
result = (10 * result) + digit;
}
if (sign) {
return -result;
}
return result;
}
bool ini_is_true(const char *value) {
int i = ini_atoi(value);
if (i) {
return true;
}
if (strlen(value) != 4) {
return false;
}
if ((value[0] != 'T') && (value[0] != 't')) {
return false;
}
if ((value[1] != 'R') && (value[1] != 'r')) {
return false;
}
if ((value[2] != 'U') && (value[2] != 'u')) {
return false;
}
if ((value[3] != 'E') && (value[3] != 'e')) {
return false;
}
return true;
}
/*
* Copyright (c) 2000-2002 Opsycon AB (www.opsycon.se)
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Opsycon AB.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*/
/** ini_fgetc(fp) -- get char from stream */
int ini_fgetc(FIL *fp) {
char c;
UINT b;
if (file_ll_read(fp, &c, 1, &b) != FR_OK || b != 1) {
return (EOF);
}
return (c);
}
/*
* Copyright (c) 2000-2002 Opsycon AB (www.opsycon.se)
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Opsycon AB.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*/
/** char *ini_fgets(dst,max,fp) -- get string from stream */
char *ini_fgets(char *dst, int max, FIL *fp) {
char *p;
int c = EOF;
/* get max bytes or upto a newline */
for (p = dst, max--; max > 0; max--) {
if ((c = ini_fgetc(fp)) == EOF) {
break;
}
*p++ = c;
if (c == '\n') {
break;
}
}
*p = 0;
if (p == dst || c == EOF) {
return NULL;
}
return (p);
}
/* inih -- simple .INI file parser
inih is released under the New BSD license (see LICENSE.txt). Go to the project
home page for more info:
https://github.com/benhoyt/inih
*/
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#include <ctype.h>
#include <string.h>
#if !INI_USE_STACK
#include <stdlib.h>
#endif
#define MAX_SECTION 50
#define MAX_NAME 50
/* Used by ini_parse_string() to keep track of string parsing state. */
typedef struct {
const char *ptr;
size_t num_left;
} ini_parse_string_ctx;
/* Strip whitespace chars off end of given string, in place. Return s. */
static char *rstrip(char *s) {
char *p = s + strlen(s);
while (p > s && ini_isspace((unsigned char) (*--p))) {
*p = '\0';
}
return s;
}
/* Return pointer to first non-whitespace char in given string. */
static char *lskip(const char *s) {
while (*s && ini_isspace((unsigned char) (*s))) {
s++;
}
return (char *) s;
}
/* Return pointer to first char (of chars) or inline comment in given string,
or pointer to null at end of string if neither found. Inline comment must
be prefixed by a whitespace character to register as a comment. */
static char *find_chars_or_comment(const char *s, const char *chars) {
#if INI_ALLOW_INLINE_COMMENTS
int was_space = 0;
while (*s && (!chars || !strchr(chars, *s)) &&
!(was_space && strchr(INI_INLINE_COMMENT_PREFIXES, *s))) {
was_space = ini_isspace((unsigned char) (*s));
s++;
}
#else
while (*s && (!chars || !strchr(chars, *s))) {
s++;
}
#endif
return (char *) s;
}
/* Version of strncpy that ensures dest (size bytes) is null-terminated. */
static char *strncpy0(char *dest, const char *src, size_t size) {
strncpy(dest, src, size - 1);
dest[size - 1] = '\0';
return dest;
}
/* See documentation in header file. */
int ini_parse_stream(ini_reader reader, void *stream, ini_handler handler,
void *user) {
/* Uses a fair bit of stack (use heap instead if you need to) */
#if INI_USE_STACK
char line[INI_MAX_LINE];
int max_line = INI_MAX_LINE;
#else
char *line;
int max_line = INI_INITIAL_ALLOC;
#endif
#if INI_ALLOW_REALLOC
char *new_line;
int offset;
#endif
char section[MAX_SECTION] = "";
char prev_name[MAX_NAME] = "";
char *start;
char *end;
char *name;
char *value;
int lineno = 0;
int error = 0;
#if !INI_USE_STACK
line = (char *) malloc(INI_INITIAL_ALLOC);
if (!line) {
return -2;
}
#endif
#if INI_HANDLER_LINENO
#define HANDLER(u, s, n, v) handler(u, s, n, v, lineno)
#else
#define HANDLER(u, s, n, v) handler(u, s, n, v)
#endif
/* Scan through stream line by line */
while (reader(line, max_line, stream) != NULL) {
#if INI_ALLOW_REALLOC
offset = strlen(line);
while (offset == max_line - 1 && line[offset - 1] != '\n') {
max_line *= 2;
if (max_line > INI_MAX_LINE) {
max_line = INI_MAX_LINE;
}
new_line = realloc(line, max_line);
if (!new_line) {
free(line);
return -2;
}
line = new_line;
if (reader(line + offset, max_line - offset, stream) == NULL) {
break;
}
if (max_line >= INI_MAX_LINE) {
break;
}
offset += strlen(line + offset);
}
#endif
lineno++;
start = line;
#if INI_ALLOW_BOM
if (lineno == 1 && (unsigned char) start[0] == 0xEF &&
(unsigned char) start[1] == 0xBB &&
(unsigned char) start[2] == 0xBF) {
start += 3;
}
#endif
start = lskip(rstrip(start));
if (*start == ';' || *start == '#') {
/* Per Python configparser, allow both ; and # comments at the
start of a line */
}
#if INI_ALLOW_MULTILINE
else if (*prev_name && *start && start > line) {
/* Non-blank line with leading whitespace, treat as continuation
of previous name's value (as per Python configparser). */
if (!HANDLER(user, section, prev_name, start) && !error) {
error = lineno;
}
}
#endif
else if (*start == '[') {
/* A "[section]" line */
end = find_chars_or_comment(start + 1, "]");
if (*end == ']') {
*end = '\0';
strncpy0(section, start + 1, sizeof(section));
*prev_name = '\0';
} else if (!error) {
/* No ']' found on section line */
error = lineno;
}
} else if (*start) {
/* Not a comment, must be a name[=:]value pair */
end = find_chars_or_comment(start, "=:");
if (*end == '=' || *end == ':') {
*end = '\0';
name = rstrip(start);
value = end + 1;
#if INI_ALLOW_INLINE_COMMENTS
end = find_chars_or_comment(value, NULL);
if (*end) {
*end = '\0';
}
#endif
value = lskip(value);
rstrip(value);
/* Valid name[=:]value pair found, call handler */
strncpy0(prev_name, name, sizeof(prev_name));
if (!HANDLER(user, section, name, value) && !error) {
error = lineno;
}
} else if (!error) {
/* No '=' or ':' found on name[=:]value line */
error = lineno;
}
}
#if INI_STOP_ON_FIRST_ERROR
if (error) {
break;
}
#endif
}
#if !INI_USE_STACK
free(line);
#endif
return error;
}
/* See documentation in header file. */
int ini_parse_file(FIL *file, ini_handler handler, void *user) {
return ini_parse_stream((ini_reader) ini_fgets, file, handler, user);
}
/* See documentation in header file. */
int ini_parse(FATFS *fs, const char *filename, ini_handler handler, void *user) {
FIL file;
int error;
FRESULT res = f_open(fs, &file, filename, FA_READ | FA_OPEN_EXISTING);
if (res != FR_OK) {
return -1;
}
error = ini_parse_file(&file, handler, user);
res = f_close(&file);
if (res != FR_OK) {
return -1;
}
return error;
}
/* An ini_reader function to read the next line from a string buffer. This
is the ini_fgets() equivalent used by ini_parse_string(). */
static char *ini_reader_string(char *str, int num, void *stream) {
ini_parse_string_ctx *ctx = (ini_parse_string_ctx *) stream;
const char *ctx_ptr = ctx->ptr;
size_t ctx_num_left = ctx->num_left;
char *strp = str;
char c;
if (ctx_num_left == 0 || num < 2) {
return NULL;
}
while (num > 1 && ctx_num_left != 0) {
c = *ctx_ptr++;
ctx_num_left--;
*strp++ = c;
if (c == '\n') {
break;
}
num--;
}
*strp = '\0';
ctx->ptr = ctx_ptr;
ctx->num_left = ctx_num_left;
return str;
}
/* See documentation in header file. */
int ini_parse_string(const char *string, ini_handler handler, void *user) {
ini_parse_string_ctx ctx;
ctx.ptr = string;
ctx.num_left = strlen(string);
return ini_parse_stream((ini_reader) ini_reader_string, &ctx, handler,
user);
}