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mist-devel.mist-firmware/ini_parser.c
Gyorgy Szombathelyi e514a1bdc4 CFG updates 
- convert corename.cfg to INI format
- mistcfg.ini as global config, writable by the firmware
- interactive setup of joystick_remap via the OSD
2022-01-12 16:01:37 +01:00

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// ini_parser.c
// 2015, rok.krajnc@gmail.com
//#define INI_PARSER_TEST
//// includes ////
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "ini_parser.h"
#ifndef INI_PARSER_TEST
#include "debug.h"
#include "fat_compat.h"
#endif
//// defines ////
#define INI_EOT 4 // End-Of-Transmission
#define INI_BUF_SIZE 512
#define INI_LINE_SIZE 140
#define INI_SECTION_START '['
#define INI_SECTION_END ']'
#define INI_SECTION_INVALID_ID 0
//// macros ////
#define CHAR_IS_NUM(c) (((c) >= '0') && ((c) <= '9'))
#define CHAR_IS_ALPHA_LOWER(c) (((c) >= 'a') && ((c) <= 'z'))
#define CHAR_IS_ALPHA_UPPER(c) (((c) >= 'A') && ((c) <= 'Z'))
#define CHAR_IS_ALPHA(c) (CHAR_IS_ALPHA_LOWER(c) || CHAR_IS_ALPHA_UPPER(c))
#define CHAR_IS_ALPHANUM(c) (CHAR_IS_ALPHA_LOWER(c) || CHAR_IS_ALPHA_UPPER(c) || CHAR_IS_NUM(c))
#define CHAR_IS_SPECIAL(c) (((c) == '[') || ((c) == ']') || ((c) == '-') || ((c) == '_') || ((c) == ',') || ((c) == '=') || ((c) == '~'))
#define CHAR_IS_VALID(c) (CHAR_IS_ALPHANUM(c) || CHAR_IS_SPECIAL(c))
#define CHAR_IS_WHITESPACE(c) (((c) == ' ') || ((c) == '\t') || ((c) == '\r') || ((c) == '\n'))
#define CHAR_IS_SPACE(c) (((c) == ' ') || ((c) == '\t'))
#define CHAR_IS_LINEEND(c) (((c) == '\n'))
#define CHAR_IS_COMMENT(c) (((c) == ';'))
#define CHAR_IS_QUOTE(c) (((c) == '"'))
#define CHAR_TO_UPPERCASE(c) ({ char _c = (c); if (CHAR_IS_ALPHA_LOWER(_c)) _c = _c - 'a' + 'A'; _c;})
#define CHAR_TO_LOWERCASE(c) ({ char _c = (c); if (CHAR_IS_ALPHA_UPPER(_c)) _c = _c - 'A' + 'a'; _c;})
//// debug func ////
#ifdef INI_PARSER_TEST
#define ini_parser_debugf(a, ...) fprintf(stderr, a "\n", __VA_ARGS__)
#endif
//// globals ////
#ifdef INI_PARSER_TEST
FILE* ini_fp = NULL;
char sector_buffer[INI_BUF_SIZE] = {0};
int ini_size=0;
#else
FIL ini_file;
#endif
static int ini_pt = 0;
//// ini_getch() ////
static char ini_getch()
{
UINT br;
if (!(ini_pt&0x1ff)) {
// reload buffer
#ifdef INI_PARSER_TEST
fread(sector_buffer, sizeof(char), INI_BUF_SIZE, ini_fp);
#else
f_read(&ini_file, sector_buffer, 512, &br);
#endif
}
#ifdef INI_PARSER_TEST
if (ini_pt >= ini_size) return 0;
#else
if (ini_pt >= f_size(&ini_file)) return 0;
#endif
else return sector_buffer[(ini_pt++)&0x1ff];
}
//// ini_putch() ////
static void ini_putch(char c)
{
UINT bw;
sector_buffer[ini_pt++] = c;
if (!(ini_pt%0x1ff)) {
// write buffer
ini_pt = 0;
#ifdef INI_PARSER_TEST
fwrite(sector_buffer, sizeof(char), INI_BUF_SIZE, ini_fp);
#else
f_write(&ini_file, sector_buffer, INI_BUF_SIZE, &bw);
#endif
}
}
//// ini_findch() ////
static char ini_findch(char c)
{
char t;
do {
t = ini_getch();
} while ((t != 0) && (t != c));
return t;
}
//// ini_getline() ////
static int ini_getline(char* line)
{
char c;
char ignore=0;
char literal=0;
int i=0;
while(1) {
c = ini_getch();
if ((!c) || CHAR_IS_LINEEND(c)) break;
else if (CHAR_IS_QUOTE(c) && !ignore) literal ^= 1;
else if (CHAR_IS_COMMENT(c) && !ignore && !literal) ignore++;
else if ((literal || (CHAR_IS_VALID(c) && !ignore)) && i<(INI_LINE_SIZE-1)) line[i++] = c;
}
line[i] = '\0';
return c==0 ? INI_EOT : literal ? 1 : 0;
}
//// ini_putline() ////
static void ini_putline(char* line)
{
int i=0;
while(i<(INI_LINE_SIZE-1)) {
if (!line[i]) break;
ini_putch(line[i++]);
}
}
//// ini_get_section() ////
static int ini_get_section(const ini_cfg_t* cfg, char* buf, const char* alter_section)
{
int i=0;
// get section start marker
if (buf[0] != INI_SECTION_START) {
return INI_SECTION_INVALID_ID;
} else buf++;
// get section stop marker
while (1) {
if (buf[i] == INI_SECTION_END) {
buf[i] = '\0';
break;
}
i++;
if (i >= INI_LINE_SIZE) {
return INI_SECTION_INVALID_ID;
}
}
// convert to uppercase
for (i=0; i<INI_LINE_SIZE; i++) {
if (!buf[i]) break;
else buf[i] = CHAR_TO_UPPERCASE(buf[i]);
}
// parse section
for (i=0; i<cfg->nsections; i++) {
if (!strcmp(buf, cfg->sections[i].name)) {
ini_parser_debugf("Got SECTION '%s' with ID %d", buf, cfg->sections[i].id);
return cfg->sections[i].id;
}
}
if(alter_section && !strcasecmp(buf, alter_section)) {
ini_parser_debugf("Got ALTER SECTION '%s' with ID %d", buf, cfg->sections[0].id);
return cfg->sections[0].id;
}
return INI_SECTION_INVALID_ID;
}
//// ini_get_var() ////
static void* ini_get_var(const ini_cfg_t* cfg, int cur_section, char* buf, int tag)
{
int i=0, j=0;
int var_id = -1;
// find var
while(1) {
if (buf[i] == '=') {
buf[i] = '\0';
break;
} else if (buf[i] == '\0') return (void*)0;
i++;
}
// convert to uppercase
for (j=0; j<=i; j++) {
if (!buf[j]) break;
else buf[j] = CHAR_TO_UPPERCASE(buf[j]);
}
// parse var
for (j=0; j<cfg->nvars; j++) {
if ((!strcmp(buf, cfg->vars[j].name)) && (cfg->vars[j].section_id == cur_section)) var_id = j;
}
// get data
if (var_id != -1) {
ini_parser_debugf("Got VAR '%s' with VALUE %s", buf, &(buf[i+1]));
i++;
switch (cfg->vars[var_id].type) {
case UINT8:
*(uint8_t*)(cfg->vars[var_id].var) = strtoul(&(buf[i]), NULL, 0);
if (*(uint8_t*)(cfg->vars[var_id].var) > cfg->vars[var_id].max) *(uint8_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(uint8_t*)(cfg->vars[var_id].var) < cfg->vars[var_id].min) *(uint8_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
case INT8:
*(int8_t*)(cfg->vars[var_id].var) = strtol(&(buf[i]), NULL, 0);
if (*(int8_t*)(cfg->vars[var_id].var) > (int8_t)cfg->vars[var_id].max) *(int8_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(int8_t*)(cfg->vars[var_id].var) < (int8_t)cfg->vars[var_id].min) *(int8_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
case UINT16:
*(uint16_t*)(cfg->vars[var_id].var) = strtoul(&(buf[i]), NULL, 0);
if (*(uint16_t*)(cfg->vars[var_id].var) > cfg->vars[var_id].max) *(uint16_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(uint16_t*)(cfg->vars[var_id].var) < cfg->vars[var_id].min) *(uint16_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
case INT16:
*(int16_t*)(cfg->vars[var_id].var) = strtol(&(buf[i]), NULL, 0);
if (*(int16_t*)(cfg->vars[var_id].var) > (int16_t)cfg->vars[var_id].max) *(int16_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(int16_t*)(cfg->vars[var_id].var) < (int16_t)cfg->vars[var_id].min) *(int16_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
case UINT32:
*(uint32_t*)(cfg->vars[var_id].var) = strtoul(&(buf[i]), NULL, 0);
if (*(uint32_t*)(cfg->vars[var_id].var) > (uint32_t)cfg->vars[var_id].max) *(uint32_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(uint32_t*)(cfg->vars[var_id].var) < (uint32_t)cfg->vars[var_id].min) *(uint32_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
case INT32:
*(int32_t*)(cfg->vars[var_id].var) = strtol(&(buf[i]), NULL, 0);
if (*(int32_t*)(cfg->vars[var_id].var) > (int32_t)cfg->vars[var_id].max) *(int32_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(int32_t*)(cfg->vars[var_id].var) < (int32_t)cfg->vars[var_id].min) *(int32_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
case UINT64:
*(uint64_t*)(cfg->vars[var_id].var) = strtoull(&(buf[i]), NULL, 0);
if (*(uint64_t*)(cfg->vars[var_id].var) > (uint64_t)cfg->vars[var_id].max) *(uint64_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(uint64_t*)(cfg->vars[var_id].var) < (uint64_t)cfg->vars[var_id].min) *(uint64_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
case INT64:
*(int64_t*)(cfg->vars[var_id].var) = strtoll(&(buf[i]), NULL, 0);
if (*(int64_t*)(cfg->vars[var_id].var) > (int64_t)cfg->vars[var_id].max) *(int64_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(int64_t*)(cfg->vars[var_id].var) < (int64_t)cfg->vars[var_id].min) *(int64_t*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
#ifdef INI_ENABLE_FLOAT
case FLOAT:
*(float*)(cfg->vars[var_id].var) = strtof(&(buf[i]), NULL);
if (*(float*)(cfg->vars[var_id].var) > cfg->vars[var_id].max) *(float*)(cfg->vars[var_id].var) = cfg->vars[var_id].max;
if (*(float*)(cfg->vars[var_id].var) < cfg->vars[var_id].min) *(float*)(cfg->vars[var_id].var) = cfg->vars[var_id].min;
break;
#endif
case STRING:
strncpy((char*)(cfg->vars[var_id].var), &(buf[i]), cfg->vars[var_id].max);
break;
case CUSTOM_HANDLER:
((custom_handler_t*)(cfg->vars[var_id].var))(&(buf[i]), INI_LOAD, tag);
break;
}
return (void*)(&(cfg->vars[var_id].var));
}
return (void*)0;
}
//// ini_parse() ////
void ini_parse(const ini_cfg_t* cfg, const char *alter_section, int tag)
{
char line[INI_LINE_SIZE] = {0};
int section = INI_SECTION_INVALID_ID;
int line_status;
ini_parser_debugf("Start INI parser for core \"%s\".", alter_section);
// open ini file
#ifdef INI_PARSER_TEST
if ((ini_fp = fopen(cfg->filename, "rb")) == NULL) {
#else
if (f_open(&ini_file, cfg->filename, FA_READ) != FR_OK) {
#endif
ini_parser_debugf("Can't open file %s !", cfg->filename);
return;
}
#ifdef INI_PARSER_TEST
// save size
fseek(ini_fp, 0L, SEEK_END);
ini_size = ftell(ini_fp);
fseek(ini_fp, 0L, SEEK_SET);
#endif
#ifdef INI_PARSER_TEST
ini_parser_debugf("Opened file %s with size %d bytes.", cfg->filename, ini_size);
#else
ini_parser_debugf("Opened file %s with size %llu bytes.", cfg->filename, f_size(&ini_file));
#endif
ini_pt = 0;
// parse ini
while (1) {
// get line
line_status = ini_getline(line);
ini_parser_debugf("line(%d): \"%s\".", line_status, line);
// if valid line
if (line_status != 1) {
if (line[0] == INI_SECTION_START) {
// if first char in line is INI_SECTION_START, get section
section = ini_get_section(cfg, line, alter_section);
} else {
// otherwise this is a variable, get it
ini_get_var(cfg, section, line, tag);
}
}
// if end of file, stop
if (line_status == INI_EOT) break;
}
#ifdef INI_PARSER_TEST
// close file
fclose(ini_fp);
#else
f_close(&ini_file);
#endif
}
//// ini_save() ////
void ini_save(const ini_cfg_t* cfg, int tag)
{
int section, var;
char line[INI_LINE_SIZE] = {0};
char val[INI_LINE_SIZE] = {0};
ini_pt = 0;
// open ini file
#ifdef INI_PARSER_TEST
if ((ini_fp = fopen(cfg->filename, "wb")) == NULL) {
#else
if (f_open(&ini_file, cfg->filename, FA_WRITE | FA_CREATE_ALWAYS) != FR_OK) {
#endif
ini_parser_debugf("Can't open file %s !", cfg->filename);
return;
}
// loop over sections
for (section=0; section<cfg->nsections; section++) {
ini_parser_debugf("writing section %s ...", cfg->sections[section].name);
siprintf(line, "[%s]\n", cfg->sections[section].name);
ini_putline(line);
// loop over vars
for (var=0; var<cfg->nvars; var++) {
if (cfg->vars[var].section_id == cfg->sections[section].id) {
ini_parser_debugf("writing var %s", cfg->vars[var].name);
switch (cfg->vars[var].type) {
case UINT8:
siprintf(line, "%s=%u\n", cfg->vars[var].name, *(uint8_t*)(cfg->vars[var].var));
break;
case UINT16:
siprintf(line, "%s=%u\n", cfg->vars[var].name, *(uint16_t*)(cfg->vars[var].var));
break;
case UINT32:
siprintf(line, "%s=%u\n", cfg->vars[var].name, *(uint32_t*)(cfg->vars[var].var));
break;
case UINT64:
siprintf(line, "%s=%llu\n", cfg->vars[var].name, *(uint64_t*)(cfg->vars[var].var));
break;
case INT8:
siprintf(line, "%s=%d\n", cfg->vars[var].name, *(int8_t*)(cfg->vars[var].var));
break;
case INT16:
siprintf(line, "%s=%d\n", cfg->vars[var].name, *(int16_t*)(cfg->vars[var].var));
break;
case INT32:
siprintf(line, "%s=%d\n", cfg->vars[var].name, *(int32_t*)(cfg->vars[var].var));
break;
#ifdef INI_ENABLE_FLOAT
case FLOAT:
siprintf(line, "%s=%f\n", cfg->vars[var].name, *(float*)(cfg->vars[var].var));
break;
#endif
case STRING:
siprintf(line, "%s=\"%s\"\n", cfg->vars[var].name, (char*)(cfg->vars[var].var));
break;
case CUSTOM_HANDLER:
while (((custom_handler_t*)(cfg->vars[var].var))(val, INI_SAVE, tag)) {
siprintf(line, "%s=\"%s\"\n", cfg->vars[var].name, val);
ini_putline(line);
};
}
if (cfg->vars[var].type != CUSTOM_HANDLER)
ini_putline(line);
}
}
}
// in case the buffer is not written yet, write it now
if (ini_pt) {
#ifdef INI_PARSER_TEST
fwrite(sector_buffer, sizeof(char), ini_pt, ini_fp);
#else
UINT bw;
f_write(&ini_file, sector_buffer, ini_pt, &bw);
#endif
}
#ifdef INI_PARSER_TEST
fclose(ini_fp);
#else
f_close(&ini_file);
#endif
}
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