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BlueSCSI/lib/minIni/minIni.cpp
Troy c2c4b83925 miniIni lib added
2022-12-22 11:19:59 -05:00

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/* minIni - Multi-Platform INI file parser, suitable for embedded systems
*
* These routines are in part based on the article "Multiplatform .INI Files"
* by Joseph J. Graf in the March 1994 issue of Dr. Dobb's Journal.
*
* Copyright (c) CompuPhase, 2008-2021
*
* 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.
*
* Version: $Id: minIni.c 53 2015-01-18 13:35:11Z thiadmer.riemersma@gmail.com $
*/
#if (defined _UNICODE || defined __UNICODE__ || defined UNICODE) && !defined INI_ANSIONLY
# if !defined UNICODE /* for Windows */
# define UNICODE
# endif
# if !defined _UNICODE /* for C library */
# define _UNICODE
# endif
#endif
#define MININI_IMPLEMENTATION
#include "minIni.h"
#if defined NDEBUG
#define assert(e)
#else
#include <assert.h>
#endif
#if !defined __T || defined INI_ANSIONLY
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#define TCHAR char
#define __T(s) s
#define _tcscat strcat
#define _tcschr strchr
#define _tcscmp strcmp
#define _tcscpy strcpy
#define _tcsicmp stricmp
#define _tcslen strlen
#define _tcsncmp strncmp
#define _tcsnicmp strnicmp
#define _tcsrchr strrchr
#define _tcstol strtol
#define _tcstod strtod
#define _totupper toupper
#define _stprintf sprintf
#define _tfgets fgets
#define _tfputs fputs
#define _tfopen fopen
#define _tremove remove
#define _trename rename
#endif
#if defined __linux || defined __linux__
#define __LINUX__
#elif defined FREEBSD && !defined __FreeBSD__
#define __FreeBSD__
#elif defined(_MSC_VER)
#pragma warning(disable: 4996) /* for Microsoft Visual C/C++ */
#endif
#if !defined strnicmp && !defined PORTABLE_STRNICMP
#if defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__ || defined __NetBSD__ || defined __DragonFly__ || defined __GNUC__
#define strnicmp strncasecmp
#endif
#endif
#if !defined _totupper
#define _totupper toupper
#endif
#if !defined INI_LINETERM
#if defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__ || defined __NetBSD__ || defined __DragonFly__
#define INI_LINETERM __T("\n")
#else
#define INI_LINETERM __T("\r\n")
#endif
#endif
#if !defined INI_FILETYPE
#error Missing definition for INI_FILETYPE.
#endif
#if !defined sizearray
#define sizearray(a) (sizeof(a) / sizeof((a)[0]))
#endif
enum quote_option {
QUOTE_NONE,
QUOTE_ENQUOTE,
QUOTE_DEQUOTE,
};
#if defined PORTABLE_STRNICMP
int strnicmp(const TCHAR *s1, const TCHAR *s2, size_t n)
{
while (n-- != 0 && (*s1 || *s2)) {
register int c1, c2;
c1 = *s1++;
if ('a' <= c1 && c1 <= 'z')
c1 += ('A' - 'a');
c2 = *s2++;
if ('a' <= c2 && c2 <= 'z')
c2 += ('A' - 'a');
if (c1 != c2)
return c1 - c2;
}
return 0;
}
#endif /* PORTABLE_STRNICMP */
static TCHAR *skipleading(const TCHAR *str)
{
assert(str != NULL);
while ('\0' < *str && *str <= ' ')
str++;
return (TCHAR *)str;
}
static TCHAR *skiptrailing(const TCHAR *str, const TCHAR *base)
{
assert(str != NULL);
assert(base != NULL);
while (str > base && '\0' < *(str-1) && *(str-1) <= ' ')
str--;
return (TCHAR *)str;
}
static TCHAR *striptrailing(TCHAR *str)
{
TCHAR *ptr = skiptrailing(_tcschr(str, '\0'), str);
assert(ptr != NULL);
*ptr = '\0';
return str;
}
static TCHAR *ini_strncpy(TCHAR *dest, const TCHAR *source, size_t maxlen, enum quote_option option)
{
size_t d, s;
assert(maxlen>0);
assert(source != NULL && dest != NULL);
assert((dest < source || (dest == source && option != QUOTE_ENQUOTE)) || dest > source + strlen(source));
if (option == QUOTE_ENQUOTE && maxlen < 3)
option = QUOTE_NONE; /* cannot store two quotes and a terminating zero in less than 3 characters */
switch (option) {
case QUOTE_NONE:
for (d = 0; d < maxlen - 1 && source[d] != '\0'; d++)
dest[d] = source[d];
assert(d < maxlen);
dest[d] = '\0';
break;
case QUOTE_ENQUOTE:
d = 0;
dest[d++] = '"';
for (s = 0; source[s] != '\0' && d < maxlen - 2; s++, d++) {
if (source[s] == '"') {
if (d >= maxlen - 3)
break; /* no space to store the escape character plus the one that follows it */
dest[d++] = '\\';
}
dest[d] = source[s];
}
dest[d++] = '"';
dest[d] = '\0';
break;
case QUOTE_DEQUOTE:
for (d = s = 0; source[s] != '\0' && d < maxlen - 1; s++, d++) {
if ((source[s] == '"' || source[s] == '\\') && source[s + 1] == '"')
s++;
dest[d] = source[s];
}
dest[d] = '\0';
break;
default:
assert(0);
}
return dest;
}
static TCHAR *cleanstring(TCHAR *string, enum quote_option *quotes)
{
int isstring;
TCHAR *ep;
assert(string != NULL);
assert(quotes != NULL);
/* Remove a trailing comment */
isstring = 0;
for (ep = string; *ep != '\0' && ((*ep != ';' && *ep != '#') || isstring); ep++) {
if (*ep == '"') {
if (*(ep + 1) == '"')
ep++; /* skip "" (both quotes) */
else
isstring = !isstring; /* single quote, toggle isstring */
} else if (*ep == '\\' && *(ep + 1) == '"') {
ep++; /* skip \" (both quotes */
}
}
assert(ep != NULL && (*ep == '\0' || *ep == ';' || *ep == '#'));
*ep = '\0'; /* terminate at a comment */
striptrailing(string);
/* Remove double quotes surrounding a value */
*quotes = QUOTE_NONE;
if (*string == '"' && (ep = _tcschr(string, '\0')) != NULL && *(ep - 1) == '"') {
string++;
*--ep = '\0';
*quotes = QUOTE_DEQUOTE; /* this is a string, so remove escaped characters */
}
return string;
}
static int getkeystring(INI_FILETYPE *fp, const TCHAR *Section, const TCHAR *Key,
int idxSection, int idxKey, TCHAR *Buffer, int BufferSize,
INI_FILEPOS *mark)
{
TCHAR *sp, *ep;
int len, idx;
enum quote_option quotes;
TCHAR LocalBuffer[INI_BUFFERSIZE];
assert(fp != NULL);
/* Move through file 1 line at a time until a section is matched or EOF. If
* parameter Section is NULL, only look at keys above the first section. If
* idxSection is positive, copy the relevant section name.
*/
len = (Section != NULL) ? (int)_tcslen(Section) : 0;
if (len > 0 || idxSection >= 0) {
assert(idxSection >= 0 || Section != NULL);
idx = -1;
do {
do {
if (!ini_read(LocalBuffer, INI_BUFFERSIZE, fp))
return 0;
sp = skipleading(LocalBuffer);
ep = _tcsrchr(sp, ']');
} while (*sp != '[' || ep == NULL);
/* When arrived here, a section was found; now optionally skip leading and
* trailing whitespace.
*/
assert(sp != NULL && *sp == '[');
sp = skipleading(sp + 1);
assert(ep != NULL && *ep == ']');
ep = skiptrailing(ep, sp);
} while ((((int)(ep-sp) != len || Section == NULL || _tcsnicmp(sp, Section, len) != 0) && ++idx != idxSection));
if (idxSection >= 0) {
if (idx == idxSection) {
assert(ep != NULL);
*ep = '\0'; /* the end of the section name was found earlier */
ini_strncpy(Buffer, sp, BufferSize, QUOTE_NONE);
return 1;
}
return 0; /* no more section found */
}
}
/* Now that the section has been found, find the entry.
* Stop searching upon leaving the section's area.
*/
assert(Key != NULL || idxKey >= 0);
len = (Key != NULL) ? (int)_tcslen(Key) : 0;
idx = -1;
do {
if (mark != NULL)
ini_tell(fp, mark); /* optionally keep the mark to the start of the line */
if (!ini_read(LocalBuffer,INI_BUFFERSIZE,fp) || *(sp = skipleading(LocalBuffer)) == '[')
return 0;
sp = skipleading(LocalBuffer);
ep = _tcschr(sp, '='); /* Parse out the equal sign */
if (ep == NULL)
ep = _tcschr(sp, ':');
} while (*sp == ';' || *sp == '#' || ep == NULL
|| ((len == 0 || (int)(skiptrailing(ep,sp)-sp) != len || _tcsnicmp(sp,Key,len) != 0) && ++idx != idxKey));
if (idxKey >= 0) {
if (idx == idxKey) {
assert(ep != NULL);
assert(*ep == '=' || *ep == ':');
*ep = '\0';
striptrailing(sp);
ini_strncpy(Buffer, sp, BufferSize, QUOTE_NONE);
return 1;
}
return 0; /* no more key found (in this section) */
}
/* Copy up to BufferSize chars to buffer */
assert(ep != NULL);
assert(*ep == '=' || *ep == ':');
sp = skipleading(ep + 1);
sp = cleanstring(sp, &quotes); /* Remove a trailing comment */
ini_strncpy(Buffer, sp, BufferSize, quotes);
return 1;
}
/** ini_gets()
* \param Section the name of the section to search for
* \param Key the name of the entry to find the value of
* \param DefValue default string in the event of a failed read
* \param Buffer a pointer to the buffer to copy into
* \param BufferSize the maximum number of characters to copy
* \param Filename the name and full path of the .ini file to read from
*
* \return the number of characters copied into the supplied buffer
*/
int ini_gets(const TCHAR *Section, const TCHAR *Key, const TCHAR *DefValue,
TCHAR *Buffer, int BufferSize, const TCHAR *Filename)
{
INI_FILETYPE fp;
int ok = 0;
if (Buffer == NULL || BufferSize <= 0 || Key == NULL)
return 0;
if (ini_openread(Filename, &fp)) {
ok = getkeystring(&fp, Section, Key, -1, -1, Buffer, BufferSize, NULL);
(void)ini_close(&fp);
}
if (!ok)
ini_strncpy(Buffer, (DefValue != NULL) ? DefValue : __T(""), BufferSize, QUOTE_NONE);
return (int)_tcslen(Buffer);
}
/** ini_getl()
* \param Section the name of the section to search for
* \param Key the name of the entry to find the value of
* \param DefValue the default value in the event of a failed read
* \param Filename the name of the .ini file to read from
*
* \return the value located at Key
*/
long ini_getl(const TCHAR *Section, const TCHAR *Key, long DefValue, const TCHAR *Filename)
{
TCHAR LocalBuffer[64];
int len = ini_gets(Section, Key, __T(""), LocalBuffer, sizearray(LocalBuffer), Filename);
return (len == 0) ? DefValue
: ((len >= 2 && _totupper((int)LocalBuffer[1]) == 'X') ? _tcstol(LocalBuffer, NULL, 16)
: _tcstol(LocalBuffer, NULL, 10));
}
#if defined INI_REAL
/** ini_getf()
* \param Section the name of the section to search for
* \param Key the name of the entry to find the value of
* \param DefValue the default value in the event of a failed read
* \param Filename the name of the .ini file to read from
*
* \return the value located at Key
*/
INI_REAL ini_getf(const TCHAR *Section, const TCHAR *Key, INI_REAL DefValue, const TCHAR *Filename)
{
TCHAR LocalBuffer[64];
int len = ini_gets(Section, Key, __T(""), LocalBuffer, sizearray(LocalBuffer), Filename);
return (len == 0) ? DefValue : ini_atof(LocalBuffer);
}
#endif
/** ini_getbool()
* \param Section the name of the section to search for
* \param Key the name of the entry to find the value of
* \param DefValue default value in the event of a failed read; it should
* zero (0) or one (1).
* \param Filename the name and full path of the .ini file to read from
*
* A true boolean is found if one of the following is matched:
* - A string starting with 'y' or 'Y'
* - A string starting with 't' or 'T'
* - A string starting with '1'
*
* A false boolean is found if one of the following is matched:
* - A string starting with 'n' or 'N'
* - A string starting with 'f' or 'F'
* - A string starting with '0'
*
* \return the true/false flag as interpreted at Key
*/
int ini_getbool(const TCHAR *Section, const TCHAR *Key, int DefValue, const TCHAR *Filename)
{
TCHAR LocalBuffer[2] = __T("");
int ret;
ini_gets(Section, Key, __T(""), LocalBuffer, sizearray(LocalBuffer), Filename);
LocalBuffer[0] = (TCHAR)_totupper((int)LocalBuffer[0]);
if (LocalBuffer[0] == 'Y' || LocalBuffer[0] == '1' || LocalBuffer[0] == 'T')
ret = 1;
else if (LocalBuffer[0] == 'N' || LocalBuffer[0] == '0' || LocalBuffer[0] == 'F')
ret = 0;
else
ret = DefValue;
return(ret);
}
/** ini_getsection()
* \param idx the zero-based sequence number of the section to return
* \param Buffer a pointer to the buffer to copy into
* \param BufferSize the maximum number of characters to copy
* \param Filename the name and full path of the .ini file to read from
*
* \return the number of characters copied into the supplied buffer
*/
int ini_getsection(int idx, TCHAR *Buffer, int BufferSize, const TCHAR *Filename)
{
INI_FILETYPE fp;
int ok = 0;
if (Buffer == NULL || BufferSize <= 0 || idx < 0)
return 0;
if (ini_openread(Filename, &fp)) {
ok = getkeystring(&fp, NULL, NULL, idx, -1, Buffer, BufferSize, NULL);
(void)ini_close(&fp);
}
if (!ok)
*Buffer = '\0';
return (int)_tcslen(Buffer);
}
/** ini_getkey()
* \param Section the name of the section to browse through, or NULL to
* browse through the keys outside any section
* \param idx the zero-based sequence number of the key to return
* \param Buffer a pointer to the buffer to copy into
* \param BufferSize the maximum number of characters to copy
* \param Filename the name and full path of the .ini file to read from
*
* \return the number of characters copied into the supplied buffer
*/
int ini_getkey(const TCHAR *Section, int idx, TCHAR *Buffer, int BufferSize, const TCHAR *Filename)
{
INI_FILETYPE fp;
int ok = 0;
if (Buffer == NULL || BufferSize <= 0 || idx < 0)
return 0;
if (ini_openread(Filename, &fp)) {
ok = getkeystring(&fp, Section, NULL, -1, idx, Buffer, BufferSize, NULL);
(void)ini_close(&fp);
}
if (!ok)
*Buffer = '\0';
return (int)_tcslen(Buffer);
}
/** ini_hassection()
* \param Section the name of the section to search for
* \param Filename the name of the .ini file to read from
*
* \return 1 if the section is found, 0 if not found
*/
int ini_hassection(const mTCHAR *Section, const mTCHAR *Filename)
{
TCHAR LocalBuffer[32]; /* dummy buffer */
INI_FILETYPE fp;
int ok = 0;
if (ini_openread(Filename, &fp)) {
ok = getkeystring(&fp, Section, NULL, -1, 0, LocalBuffer, sizearray(LocalBuffer), NULL);
(void)ini_close(&fp);
}
return ok;
}
/** ini_haskey()
* \param Section the name of the section to search for
* \param Key the name of the entry to find the value of
* \param Filename the name of the .ini file to read from
*
* \return 1 if the key is found, 0 if not found
*/
int ini_haskey(const mTCHAR *Section, const mTCHAR *Key, const mTCHAR *Filename)
{
TCHAR LocalBuffer[32]; /* dummy buffer */
INI_FILETYPE fp;
int ok = 0;
if (ini_openread(Filename, &fp)) {
ok = getkeystring(&fp, Section, Key, -1, -1, LocalBuffer, sizearray(LocalBuffer), NULL);
(void)ini_close(&fp);
}
return ok;
}
#if !defined INI_NOBROWSE
/** ini_browse()
* \param Callback a pointer to a function that will be called for every
* setting in the INI file.
* \param UserData arbitrary data, which the function passes on the
* \c Callback function
* \param Filename the name and full path of the .ini file to read from
*
* \return 1 on success, 0 on failure (INI file not found)
*
* \note The \c Callback function must return 1 to continue
* browsing through the INI file, or 0 to stop. Even when the
* callback stops the browsing, this function will return 1
* (for success).
*/
int ini_browse(INI_CALLBACK Callback, void *UserData, const TCHAR *Filename)
{
TCHAR LocalBuffer[INI_BUFFERSIZE];
int lenSec, lenKey;
enum quote_option quotes;
INI_FILETYPE fp;
if (Callback == NULL)
return 0;
if (!ini_openread(Filename, &fp))
return 0;
LocalBuffer[0] = '\0'; /* copy an empty section in the buffer */
lenSec = (int)_tcslen(LocalBuffer) + 1;
for ( ;; ) {
TCHAR *sp, *ep;
if (!ini_read(LocalBuffer + lenSec, INI_BUFFERSIZE - lenSec, &fp))
break;
sp = skipleading(LocalBuffer + lenSec);
/* ignore empty strings and comments */
if (*sp == '\0' || *sp == ';' || *sp == '#')
continue;
/* see whether we reached a new section */
ep = _tcsrchr(sp, ']');
if (*sp == '[' && ep != NULL) {
sp = skipleading(sp + 1);
ep = skiptrailing(ep, sp);
*ep = '\0';
ini_strncpy(LocalBuffer, sp, INI_BUFFERSIZE, QUOTE_NONE);
lenSec = (int)_tcslen(LocalBuffer) + 1;
continue;
}
/* not a new section, test for a key/value pair */
ep = _tcschr(sp, '='); /* test for the equal sign or colon */
if (ep == NULL)
ep = _tcschr(sp, ':');
if (ep == NULL)
continue; /* invalid line, ignore */
*ep++ = '\0'; /* split the key from the value */
striptrailing(sp);
ini_strncpy(LocalBuffer + lenSec, sp, INI_BUFFERSIZE - lenSec, QUOTE_NONE);
lenKey = (int)_tcslen(LocalBuffer + lenSec) + 1;
/* clean up the value */
sp = skipleading(ep);
sp = cleanstring(sp, &quotes); /* Remove a trailing comment */
ini_strncpy(LocalBuffer + lenSec + lenKey, sp, INI_BUFFERSIZE - lenSec - lenKey, quotes);
/* call the callback */
if (!Callback(LocalBuffer, LocalBuffer + lenSec, LocalBuffer + lenSec + lenKey, UserData))
break;
}
(void)ini_close(&fp);
return 1;
}
#endif /* INI_NOBROWSE */
#if ! defined INI_READONLY
static void ini_tempname(TCHAR *dest, const TCHAR *source, int maxlength)
{
TCHAR *p;
ini_strncpy(dest, source, maxlength, QUOTE_NONE);
p = _tcschr(dest, '\0');
assert(p != NULL);
*(p - 1) = '~';
}
static enum quote_option check_enquote(const TCHAR *Value)
{
const TCHAR *p;
/* run through the value, if it has trailing spaces, or '"', ';' or '#'
* characters, enquote it
*/
assert(Value != NULL);
for (p = Value; *p != '\0' && *p != '"' && *p != ';' && *p != '#'; p++)
/* nothing */;
return (*p != '\0' || (p > Value && *(p - 1) == ' ')) ? QUOTE_ENQUOTE : QUOTE_NONE;
}
static void writesection(TCHAR *LocalBuffer, const TCHAR *Section, INI_FILETYPE *fp)
{
if (Section != NULL && _tcslen(Section) > 0) {
TCHAR *p;
LocalBuffer[0] = '[';
ini_strncpy(LocalBuffer + 1, Section, INI_BUFFERSIZE - 4, QUOTE_NONE); /* -1 for '[', -1 for ']', -2 for '\r\n' */
p = _tcschr(LocalBuffer, '\0');
assert(p != NULL);
*p++ = ']';
_tcscpy(p, INI_LINETERM); /* copy line terminator (typically "\n") */
if (fp != NULL)
(void)ini_write(LocalBuffer, fp);
}
}
static void writekey(TCHAR *LocalBuffer, const TCHAR *Key, const TCHAR *Value, INI_FILETYPE *fp)
{
TCHAR *p;
enum quote_option option = check_enquote(Value);
ini_strncpy(LocalBuffer, Key, INI_BUFFERSIZE - 3, QUOTE_NONE); /* -1 for '=', -2 for '\r\n' */
p = _tcschr(LocalBuffer, '\0');
assert(p != NULL);
*p++ = '=';
ini_strncpy(p, Value, INI_BUFFERSIZE - (p - LocalBuffer) - 2, option); /* -2 for '\r\n' */
p = _tcschr(LocalBuffer, '\0');
assert(p != NULL);
_tcscpy(p, INI_LINETERM); /* copy line terminator (typically "\n") */
if (fp != NULL)
(void)ini_write(LocalBuffer, fp);
}
static int cache_accum(const TCHAR *string, int *size, int max)
{
int len = (int)_tcslen(string);
if (*size + len >= max)
return 0;
*size += len;
return 1;
}
static int cache_flush(TCHAR *buffer, int *size,
INI_FILETYPE *rfp, INI_FILETYPE *wfp, INI_FILEPOS *mark)
{
int terminator_len = (int)_tcslen(INI_LINETERM);
int pos = 0, pos_prev = -1;
(void)ini_seek(rfp, mark);
assert(buffer != NULL);
buffer[0] = '\0';
assert(size != NULL);
assert(*size <= INI_BUFFERSIZE);
while (pos < *size && pos != pos_prev) {
pos_prev = pos; /* to guard against zero bytes in the INI file */
(void)ini_read(buffer + pos, INI_BUFFERSIZE - pos, rfp);
while (pos < *size && buffer[pos] != '\0')
pos++; /* cannot use _tcslen() because buffer may not be zero-terminated */
}
if (buffer[0] != '\0') {
assert(pos > 0 && pos <= INI_BUFFERSIZE);
if (pos == INI_BUFFERSIZE)
pos--;
buffer[pos] = '\0'; /* force zero-termination (may be left unterminated in the above while loop) */
(void)ini_write(buffer, wfp);
}
ini_tell(rfp, mark); /* update mark */
*size = 0;
/* return whether the buffer ended with a line termination */
return (pos > terminator_len) && (_tcscmp(buffer + pos - terminator_len, INI_LINETERM) == 0);
}
static int close_rename(INI_FILETYPE *rfp, INI_FILETYPE *wfp, const TCHAR *filename, TCHAR *buffer)
{
(void)ini_close(rfp);
(void)ini_close(wfp);
(void)ini_tempname(buffer, filename, INI_BUFFERSIZE);
#if defined ini_remove || defined INI_REMOVE
(void)ini_remove(filename);
#endif
(void)ini_rename(buffer, filename);
return 1;
}
/** ini_puts()
* \param Section the name of the section to write the string in
* \param Key the name of the entry to write, or NULL to erase all keys in the section
* \param Value a pointer to the buffer the string, or NULL to erase the key
* \param Filename the name and full path of the .ini file to write to
*
* \return 1 if successful, otherwise 0
*/
int ini_puts(const TCHAR *Section, const TCHAR *Key, const TCHAR *Value, const TCHAR *Filename)
{
INI_FILETYPE rfp;
INI_FILETYPE wfp;
INI_FILEPOS mark;
INI_FILEPOS head, tail;
TCHAR *sp, *ep;
TCHAR LocalBuffer[INI_BUFFERSIZE];
int len, match, flag, cachelen;
assert(Filename != NULL);
if (!ini_openread(Filename, &rfp)) {
/* If the .ini file doesn't exist, make a new file */
if (Key != NULL && Value != NULL) {
if (!ini_openwrite(Filename, &wfp))
return 0;
writesection(LocalBuffer, Section, &wfp);
writekey(LocalBuffer, Key, Value, &wfp);
(void)ini_close(&wfp);
}
return 1;
}
/* If parameters Key and Value are valid (so this is not an "erase" request)
* and the setting already exists, there are two short-cuts to avoid rewriting
* the INI file.
*/
if (Key != NULL && Value != NULL) {
match = getkeystring(&rfp, Section, Key, -1, -1, LocalBuffer, sizearray(LocalBuffer), &head);
if (match) {
/* if the current setting is identical to the one to write, there is
* nothing to do.
*/
if (_tcscmp(LocalBuffer,Value) == 0) {
(void)ini_close(&rfp);
return 1;
}
/* if the new setting has the same length as the current setting, and the
* glue file permits file read/write access, we can modify in place.
*/
#if defined ini_openrewrite || defined INI_OPENREWRITE
/* we already have the start of the (raw) line, get the end too */
ini_tell(&rfp, &tail);
/* create new buffer (without writing it to file) */
writekey(LocalBuffer, Key, Value, NULL);
if (_tcslen(LocalBuffer) == (size_t)(tail - head)) {
/* length matches, close the file & re-open for read/write, then
* write at the correct position
*/
(void)ini_close(&rfp);
if (!ini_openrewrite(Filename, &wfp))
return 0;
(void)ini_seek(&wfp, &head);
(void)ini_write(LocalBuffer, &wfp);
(void)ini_close(&wfp);
return 1;
}
#endif
}
/* key not found, or different value & length -> proceed */
} else if (Key != NULL && Value == NULL) {
/* Conversely, for a request to delete a setting; if that setting isn't
present, just return */
match = getkeystring(&rfp, Section, Key, -1, -1, LocalBuffer, sizearray(LocalBuffer), NULL);
if (!match) {
(void)ini_close(&rfp);
return 1;
}
/* key found -> proceed to delete it */
}
/* Get a temporary file name to copy to. Use the existing name, but with
* the last character set to a '~'.
*/
(void)ini_close(&rfp);
ini_tempname(LocalBuffer, Filename, INI_BUFFERSIZE);
if (!ini_openwrite(LocalBuffer, &wfp))
return 0;
/* In the case of (advisory) file locks, ini_openwrite() may have been blocked
* on the open, and after the block is lifted, the original file may have been
* renamed, which is why the original file was closed and is now reopened */
if (!ini_openread(Filename, &rfp)) {
/* If the .ini file doesn't exist any more, make a new file */
assert(Key != NULL && Value != NULL);
writesection(LocalBuffer, Section, &wfp);
writekey(LocalBuffer, Key, Value, &wfp);
(void)ini_close(&wfp);
return 1;
}
(void)ini_tell(&rfp, &mark);
cachelen = 0;
/* Move through the file one line at a time until a section is
* matched or until EOF. Copy to temp file as it is read.
*/
len = (Section != NULL) ? (int)_tcslen(Section) : 0;
if (len > 0) {
do {
if (!ini_read(LocalBuffer, INI_BUFFERSIZE, &rfp)) {
/* Failed to find section, so add one to the end */
flag = cache_flush(LocalBuffer, &cachelen, &rfp, &wfp, &mark);
if (Key!=NULL && Value!=NULL) {
if (!flag)
(void)ini_write(INI_LINETERM, &wfp); /* force a new line behind the last line of the INI file */
writesection(LocalBuffer, Section, &wfp);
writekey(LocalBuffer, Key, Value, &wfp);
}
return close_rename(&rfp, &wfp, Filename, LocalBuffer); /* clean up and rename */
}
/* Check whether this line is a section */
sp = skipleading(LocalBuffer);
ep = _tcsrchr(sp, ']');
match = (*sp == '[' && ep != NULL);
if (match) {
/* A section was found, skip leading and trailing whitespace */
assert(sp != NULL && *sp == '[');
sp = skipleading(sp + 1);
assert(ep != NULL && *ep == ']');
ep = skiptrailing(ep, sp);
match = ((int)(ep-sp) == len && _tcsnicmp(sp, Section, len) == 0);
}
/* Copy the line from source to dest, but not if this is the section that
* we are looking for and this section must be removed
*/
if (!match || Key != NULL) {
if (!cache_accum(LocalBuffer, &cachelen, INI_BUFFERSIZE)) {
cache_flush(LocalBuffer, &cachelen, &rfp, &wfp, &mark);
(void)ini_read(LocalBuffer, INI_BUFFERSIZE, &rfp);
cache_accum(LocalBuffer, &cachelen, INI_BUFFERSIZE);
}
}
} while (!match);
}
cache_flush(LocalBuffer, &cachelen, &rfp, &wfp, &mark);
/* when deleting a section, the section head that was just found has not been
* copied to the output file, but because this line was not "accumulated" in
* the cache, the position in the input file was reset to the point just
* before the section; this must now be skipped (again)
*/
if (Key == NULL) {
(void)ini_read(LocalBuffer, INI_BUFFERSIZE, &rfp);
(void)ini_tell(&rfp, &mark);
}
/* Now that the section has been found, find the entry. Stop searching
* upon leaving the section's area. Copy the file as it is read
* and create an entry if one is not found.
*/
len = (Key != NULL) ? (int)_tcslen(Key) : 0;
for( ;; ) {
if (!ini_read(LocalBuffer, INI_BUFFERSIZE, &rfp)) {
/* EOF without an entry so make one */
flag = cache_flush(LocalBuffer, &cachelen, &rfp, &wfp, &mark);
if (Key!=NULL && Value!=NULL) {
if (!flag)
(void)ini_write(INI_LINETERM, &wfp); /* force a new line behind the last line of the INI file */
writekey(LocalBuffer, Key, Value, &wfp);
}
return close_rename(&rfp, &wfp, Filename, LocalBuffer); /* clean up and rename */
}
sp = skipleading(LocalBuffer);
ep = _tcschr(sp, '='); /* Parse out the equal sign */
if (ep == NULL)
ep = _tcschr(sp, ':');
match = (ep != NULL && len > 0 && (int)(skiptrailing(ep,sp)-sp) == len && _tcsnicmp(sp,Key,len) == 0);
if ((Key != NULL && match) || *sp == '[')
break; /* found the key, or found a new section */
/* copy other keys in the section */
if (Key == NULL) {
(void)ini_tell(&rfp, &mark); /* we are deleting the entire section, so update the read position */
} else {
if (!cache_accum(LocalBuffer, &cachelen, INI_BUFFERSIZE)) {
cache_flush(LocalBuffer, &cachelen, &rfp, &wfp, &mark);
(void)ini_read(LocalBuffer, INI_BUFFERSIZE, &rfp);
cache_accum(LocalBuffer, &cachelen, INI_BUFFERSIZE);
}
}
}
/* the key was found, or we just dropped on the next section (meaning that it
* wasn't found); in both cases we need to write the key, but in the latter
* case, we also need to write the line starting the new section after writing
* the key
*/
flag = (*sp == '[');
cache_flush(LocalBuffer, &cachelen, &rfp, &wfp, &mark);
if (Key != NULL && Value != NULL)
writekey(LocalBuffer, Key, Value, &wfp);
/* cache_flush() reset the "read pointer" to the start of the line with the
* previous key or the new section; read it again (because writekey() destroyed
* the buffer)
*/
(void)ini_read(LocalBuffer, INI_BUFFERSIZE, &rfp);
if (flag) {
/* the new section heading needs to be copied to the output file */
cache_accum(LocalBuffer, &cachelen, INI_BUFFERSIZE);
} else {
/* forget the old key line */
(void)ini_tell(&rfp, &mark);
}
/* Copy the rest of the INI file */
while (ini_read(LocalBuffer, INI_BUFFERSIZE, &rfp)) {
if (!cache_accum(LocalBuffer, &cachelen, INI_BUFFERSIZE)) {
cache_flush(LocalBuffer, &cachelen, &rfp, &wfp, &mark);
(void)ini_read(LocalBuffer, INI_BUFFERSIZE, &rfp);
cache_accum(LocalBuffer, &cachelen, INI_BUFFERSIZE);
}
}
cache_flush(LocalBuffer, &cachelen, &rfp, &wfp, &mark);
return close_rename(&rfp, &wfp, Filename, LocalBuffer); /* clean up and rename */
}
/* Ansi C "itoa" based on Kernighan & Ritchie's "Ansi C" book. */
#define ABS(v) ((v) < 0 ? -(v) : (v))
static void strreverse(TCHAR *str)
{
int i, j;
for (i = 0, j = (int)_tcslen(str) - 1; i < j; i++, j--) {
TCHAR t = str[i];
str[i] = str[j];
str[j] = t;
}
}
static void long2str(long value, TCHAR *str)
{
int i = 0;
long sign = value;
/* generate digits in reverse order */
do {
int n = (int)(value % 10); /* get next lowest digit */
str[i++] = (TCHAR)(ABS(n) + '0'); /* handle case of negative digit */
} while (value /= 10); /* delete the lowest digit */
if (sign < 0)
str[i++] = '-';
str[i] = '\0';
strreverse(str);
}
/** ini_putl()
* \param Section the name of the section to write the value in
* \param Key the name of the entry to write
* \param Value the value to write
* \param Filename the name and full path of the .ini file to write to
*
* \return 1 if successful, otherwise 0
*/
int ini_putl(const TCHAR *Section, const TCHAR *Key, long Value, const TCHAR *Filename)
{
TCHAR LocalBuffer[32];
long2str(Value, LocalBuffer);
return ini_puts(Section, Key, LocalBuffer, Filename);
}
#if defined INI_REAL
/** ini_putf()
* \param Section the name of the section to write the value in
* \param Key the name of the entry to write
* \param Value the value to write
* \param Filename the name and full path of the .ini file to write to
*
* \return 1 if successful, otherwise 0
*/
int ini_putf(const TCHAR *Section, const TCHAR *Key, INI_REAL Value, const TCHAR *Filename)
{
TCHAR LocalBuffer[64];
ini_ftoa(LocalBuffer, Value);
return ini_puts(Section, Key, LocalBuffer, Filename);
}
#endif /* INI_REAL */
#endif /* !INI_READONLY */
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