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loadconfig.c
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loadconfig.c
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#include <stdio.h>
#include <string.h>
//#include <malloc.h>
#include <stdlib.h>
#include <time.h>
#include <pthread.h>
#include <limits.h>
/* local objects */
#include "loadconfig.h"
#include "config.h"
#include "error.h"
#include "aldl-io.h"
#include "useful.h"
/************ SCOPE *********************************
This object contains configuration file loading
routines, all based around two symbols, the equals
sign and the double quote.
****************************************************/
/* ------- GLOBAL----------------------- */
aldl_conf_t *aldl; /* aldl data structure */
aldl_commdef_t *comm; /* comm specs */
/* ------- LOCAL FUNCTIONS ------------- */
/* is a char whitespace ...? */
inline int is_whitespace(char ch);
/* following functions use internally stored config and should never be
exported ... */
/* get a packet config string */
char *pktconfig(char *buf, char *parameter, int n);
char *dconfig(char *buf, char *parameter, int n);
/* initial memory allocation routines */
void aldl_alloc_a(); /* fixed structures */
void aldl_alloc_b(); /* definition arrays */
void aldl_alloc_c(); /* more data space */
/* config file loading */
void load_config_a(dfile_t *config); /* load data to alloc_a structures */
void load_config_b(dfile_t *config); /* load data to alloc_b structures */
void load_config_c(dfile_t *config);
char *load_config_root(dfile_t *config); /* returns path to sub config */
aldl_conf_t *aldl_setup() {
/* load root config file ... */
dfile_t *config = dfile_load(ROOT_CONFIG_FILE);
if(config == NULL) error(1,ERROR_CONFIG,
"cant load root config file: %s", ROOT_CONFIG_FILE);
#ifdef DEBUGCONFIG
print_config(config);
#endif
/* allocate main (predictable) structures */
aldl_alloc_a(); /* creates aldl_conf_t structure ... */
#ifdef DEBUGCONFIG
printf("loading root config...\n");
#endif
char *configfile = load_config_root(config);
/* load def config file ... */
config = dfile_load(configfile); /* re-use pointer */
if(config == NULL) error(1,ERROR_CONFIG,
"cant load definition file: %s",configfile);
#ifdef DEBUGCONFIG
print_config(config);
printf("configuration, stage A...\n");
#endif
load_config_a(config);
#ifdef DEBUGCONFIG
printf("configuration, stage B...\n");
#endif
aldl_alloc_b();
load_config_b(config);
#ifdef DEBUGCONFIG
printf("configuration, stage C...\n");
#endif
aldl_alloc_c();
load_config_c(config);
#ifdef DEBUGCONFIG
printf("configuration complete.\n");
#endif
return aldl;
}
void aldl_alloc_a() {
/* primary aldl configuration structure */
aldl = smalloc(sizeof(aldl_conf_t));
memset(aldl,0,sizeof(aldl_conf_t));
#ifdef DEBUGMEM
printf("aldl_conf_t: %i bytes\n",(int)sizeof(aldl_conf_t));
#endif
/* communication definition */
comm = smalloc(sizeof(aldl_commdef_t));
memset(comm,0,sizeof(aldl_commdef_t));
aldl->comm = comm; /* link to conf */
#ifdef DEBUGMEM
printf("aldl_commdef_t: %i bytes\n",(int)sizeof(aldl_commdef_t));
#endif
/* stats tracking structure */
aldl->stats = smalloc(sizeof(aldl_stats_t));
if(aldl->stats == NULL) error(1,ERROR_MEMORY,"stats alloc");
memset(aldl->stats,0,sizeof(aldl_stats_t));
#ifdef DEBUGMEM
printf("aldl_stats_t: %i bytes\n",(int)sizeof(aldl_stats_t));
#endif
}
char *load_config_root(dfile_t *config) {
aldl->serialstr = configopt(config,"PORT",NULL);
aldl->bufsize = configopt_int(config,"BUFFER",10,10000,200);
aldl->bufstart = configopt_int(config,"START",10,10000,aldl->bufsize / 2);
aldl->minmax = configopt_int(config,"MINMAX",0,1,1);
aldl->maxfail = configopt_int(config,"MAXFAIL",1,1000,6);
aldl->rate = configopt_int(config,"ACQRATE",0,100000,0);
/* plugins */
aldl->consoleif_enable = configopt_int(config,"CONSOLEIF_ENABLE",0,1,0);
aldl->datalogger_enable = configopt_int(config,"DATALOGGER_ENABLE",0,1,0);
aldl->remote_enable = configopt_int(config,"REMOTE_ENABLE",0,1,0);
aldl->dataserver_enable = configopt_int(config,"DATASERVER_ENABLE",0,1,0);
aldl->datalogger_config = configopt(config,"DATALOGGER_CONFIG",NULL);
aldl->consoleif_config = configopt(config,"CONSOLEIF_CONFIG",NULL);
aldl->dataserver_config = configopt(config,"DATASERVER_CONFIG",NULL);
/* return definition file path */
return configopt_fatal(config,"DEFINITION"); /* path not stored ... */
}
void load_config_a(dfile_t *config) {
comm->checksum_enable = configopt_int(config,"CHECKSUM_ENABLE",0,1,1);;
comm->pcm_address = configopt_byte_fatal(config,"PCM_ADDRESS");
comm->chatterwait = configopt_int(config,"IDLE_ENABLE",0,1,1);
if(comm->chatterwait == 1) { /* idle chatter enabled */
comm->idledelay = configopt_int(config,"IDLE_DELAY",0,5000,10);
}
comm->shutuprepeat = configopt_int(config,"SHUTUP_REPEAT",0,5000,1);
if(comm->shutuprepeat > 0) { /* shutup enabled */
comm->shutupcommand = generate_mode(configopt_byte_fatal(config,"SHUTUP_MODE"),comm);
comm->returncommand = generate_mode(configopt_byte_fatal(config,"RETURN_MODE"),comm);
comm->shutuprepeatdelay = configopt_int(config,"SHUTUP_DELAY",0,5000,75);
comm->shutup_time = configopt_int(config,"SHUTUP_TIME",0,65535,2500);
}
comm->n_packets = configopt_int(config,"N_PACKETS",1,99,1);
comm->byteorder = configopt_int(config,"BYTEORDER",0,1,0);
aldl->n_defs = configopt_int_fatal(config,"N_DEFS",1,512);
}
void aldl_alloc_b() {
/* allocate space to store packet definitions */
comm->packet = smalloc(sizeof(aldl_packetdef_t) * comm->n_packets);
#ifdef DEBUGMEM
printf("aldl_commdef_t: %i bytes\n",(int)sizeof(aldl_commdef_t));
#endif
}
void load_config_b(dfile_t *config) {
int x;
char *pktname = smalloc(50);
for(x=0;x<comm->n_packets;x++) {
comm->packet[x].id = configopt_byte_fatal(config,pktconfig(pktname,"ID",x));
comm->packet[x].length = configopt_int_fatal(config,pktconfig(pktname,
"SIZE",x),1,255);
comm->packet[x].offset = configopt_int(config,pktconfig(pktname,
"OFFSET",x),0,254,3);
comm->packet[x].frequency = configopt_int(config,pktconfig(pktname,
"FREQUENCY",x),0,1000,1);
generate_pktcommand(&comm->packet[x],comm);
#ifdef DEBUGCONFIG
printf("loaded packet %i\n",x);
#endif
}
free(pktname);
}
void aldl_alloc_c() {
/* storage for raw packet data */
int x = 0;
for(x=0;x<comm->n_packets;x++) {
comm->packet[x].data = smalloc(comm->packet[x].length);
#ifdef DEBUGMEM
printf("packet %i raw storage: %i bytes\n",x,comm->packet[x].length);
#endif
if(comm->packet[x].data == NULL) error(1,ERROR_MEMORY,"pkt data");
}
/* storage for data definitions */
aldl->def = smalloc(sizeof(aldl_define_t) * aldl->n_defs);
#ifdef DEBUGMEM
printf("aldl_define_t definition storage: %i bytes\n",
(int)sizeof(aldl_define_t) * aldl->n_defs);
#endif
}
void load_config_c(dfile_t *config) {
int x=0;
char *configstr = smalloc(50);
char *tmp;
char f; /* filter tmp */
aldl_define_t *d;
int z;
for(x=0;x<aldl->n_defs;x++) {
d = &aldl->def[x]; /* shortcut to def */
tmp=configopt(config,dconfig(configstr,"TYPE",x),"FLOAT");
if(rf_strcmp(tmp,"BINARY") == 1 || rf_strcmp(tmp,"ERROR") == 1) {
d->type=ALDL_BOOL;
d->binary=configopt_int_fatal(config,dconfig(configstr,"BINARY",x),0,7);
d->invert=configopt_int(config,dconfig(configstr,"INVERT",x),0,1,0);
d->uom=NULL;
if(rf_strcmp(tmp,"ERROR") == 1) d->err = 1;
} else {
if(rf_strcmp(tmp,"FLOAT") == 1) {
d->type=ALDL_FLOAT;
d->precision=configopt_int(config,dconfig(configstr,"PRECISION",x),0,1000,0);
d->min.f=configopt_float(config,dconfig(configstr,"MIN",x),0);
d->max.f=configopt_float(config,dconfig(configstr,"MAX",x),9999999);
d->adder.f=configopt_float(config,dconfig(configstr,"ADDER",x),0);
d->multiplier.f=configopt_float(config,dconfig(configstr,"MULTIPLIER",x),1);
d->alarm_low.f=configopt_float(config,dconfig(configstr,"ALARM_LOW",x),0);
d->alarm_high.f=configopt_float(config,dconfig(configstr,"ALARM_HIGH",x),0);
} else if(rf_strcmp(tmp,"INT") == 1) {
d->type=ALDL_INT;
d->min.i=configopt_int(config,dconfig(configstr,"MIN",x),-32678,32767,0);
d->max.i=configopt_int(config,dconfig(configstr,"MAX",x),-32678,32767,65535);
d->adder.i=configopt_int(config,dconfig(configstr,"ADDER",x),-32678,32767,0);
d->multiplier.i=configopt_int(config,dconfig(configstr,"MULTIPLIER",x),
-32678,32767,1);
d->alarm_low.i=configopt_int(config,dconfig(configstr,"ALARM_LOW",x),
0,32767,0);
d->alarm_high.i=configopt_int(config,dconfig(configstr,"ALARM_HIGH",x),
0,32767,0);
} else {
error(1,ERROR_CONFIG,"invalid data type %s in def %i",tmp,x);
}
d->uom=configopt(config,dconfig(configstr,"UOM",x),NULL);
/* check for illegal chars in uom */
if(d->uom != NULL) {
f = rf_listcmp(d->uom, CONFIG_BAD_CHARS);
if(f != 0) {
error(1,ERROR_CONFIG,"bad char %c in UOM of def %i",f,x);
}
}
d->size=configopt_int(config,dconfig(configstr,"SIZE",x),1,32,8);
/* FIXME no support for signed input type */
}
d->alarm_low_enable=configopt_int(config,dconfig(configstr,
"ALARM_LOW_ENABLE",x),0,1,0);
d->alarm_high_enable=configopt_int(config,dconfig(configstr,
"ALARM_HIGH_ENABLE",x),0,1,0);
d->offset=configopt_byte_fatal(config,dconfig(configstr,"OFFSET",x));
d->packet=configopt_byte(config,dconfig(configstr,"PACKET",x),0x00);
if(d->packet > comm->n_packets - 1) error(1,ERROR_CONFIG,
"packet %i out of range in def %i",d->packet,x);
d->name=configopt_fatal(config,dconfig(configstr,"NAME",x));
/* check for illegal chars in name */
f = rf_listcmp(d->name, CONFIG_BAD_CHARS);
if(f != 0) {
error(1,ERROR_CONFIG,"bad char %c in NAME of def %i",f,x);
}
for(z=x-1;z>=0;z--) { /* check for duplicate name */
if(rf_strcmp(aldl->def[z].name,d->name) == 1) error(1,ERROR_CONFIG,
"duplicate name %s at id %i and %i",
d->name,x,z);
}
d->description=configopt_fatal(config,dconfig(configstr,"DESC",x));
d->log=configopt_int(config,dconfig(configstr,"LOG",x),0,1,0);
d->display=configopt_int(config,dconfig(configstr,"DISPLAY",x),0,1,0);
#ifdef DEBUGCONFIG
printf("loaded definition %i\n",x);
#endif
}
free(configstr);
}
char *configopt_fatal(dfile_t *config, char *str) {
char *val = configopt(config,str,NULL);
if(val == NULL) error(1,ERROR_CONFIG_MISSING,str);
return val;
}
char *configopt(dfile_t *config,char *str,char *def) {
char *val = value_by_parameter(str, config);
if(val == NULL) return def;
return val;
}
float configopt_float(dfile_t *config, char *str, float def) {
char *in = configopt(config,str,NULL);
#ifdef DEBUGCONFIG
if(in == NULL) {
printf("caught default value for %s: %f\n",str,def);
return def;
}
#else
if(in == NULL) return def;
#endif
float x = atof(in);
return x;
}
float configopt_float_fatal(dfile_t *config,char *str) {
float x = atof(configopt_fatal(config,str));
return x;
}
int configopt_int(dfile_t *config,char *str, int min, int max, int def) {
char *in = configopt(config,str,NULL);
#ifdef DEBUGCONFIG
if(in == NULL) {
printf("caught default value for %s: %i\n",str,def);
return def;
}
#else
if(in == NULL) return def;
#endif
int x = atoi(in);
if(x < min || x > max) error(1,ERROR_CONFIG,
"%s must be between %i and %i",str,min,max);
return x;
}
int configopt_int_fatal(dfile_t *config,char *str, int min, int max) {
int x = atoi(configopt_fatal(config,str));
if(x < min || x > max) error(1,ERROR_CONFIG,
"%s must be between %i and %i",str,min,max);
return x;
}
byte configopt_byte(dfile_t *config,char *str, byte def) {
char *in = configopt(config,str,NULL);
#ifdef DEBUGCONFIG
if(in == NULL) {
printf("caught default value for %s: ",str);
printhexstring(&def,1);
return def;
}
#else
if(in == NULL) return def;
#endif
return hextobyte(in);
}
byte configopt_byte_fatal(dfile_t *config,char *str) {
char *in = configopt_fatal(config,str);
return hextobyte(in);
}
char *pktconfig(char *buf, char *parameter, int n) {
sprintf(buf,"P%i.%s",n,parameter);
return buf;
}
char *dconfig(char *buf, char *parameter, int n) {
sprintf(buf,"D%i.%s",n,parameter);
return buf;
}
dfile_t *dfile_load(char *filename) {
char *data = load_file(filename);
if(data == NULL) return NULL;
dfile_t *d = dfile(data);
dfile_strip_quotes(d);
dfile_shrink(d);
free(data);
return d;
}
void dfile_strip_quotes(dfile_t *d) {
int x;
char *c; /* cursor*/
for(x=0;x<d->n;x++) {
if(d->v[x][0] == '"') {
d->v[x]++;
c = d->v[x];
while(*c != '"') {
if(*c == EOF) {
error(1,ERROR_CONFIG,"Unterminated quote in config file");
}
c++;
}
c[0] = 0;
}
}
}
dfile_t *dfile(char *data) {
/* allocate base structure */
dfile_t *out = smalloc(sizeof(dfile_t));
/* initial allocation of pointer array */
out->p = smalloc(sizeof(char*) * MAX_PARAMETERS);
out->v = smalloc(sizeof(char*) * MAX_PARAMETERS);
out->n = 0;
/* more useful variables */
char *c; /* operating cursor within data */
char *cx; /* auxiliary operating cursor */
char *cz;
int len = strlen(data);
for(c=data;c<data+len;c++) { /* iterate through entire data set */
if(c[0] == '=') {
if(c == data || c == data + len) continue; /* handle first or last char */
out->v[out->n] = c + 1;
c[0] = 0;
cx = c + 1;
/* find parameter value */
while(is_whitespace(*cx) != 1) {
if(*cx == '"') { /* skip quoted string */
cx++;
while(cx[0] != '"') {
if(cx[1] == 0) error(1,ERROR_CONFIG,"Unterminated quote in config");
if(cx == data + len) continue;
cx++;
}
}
cx++;
}
cx[0] = 0; /* null end */
cz = cx; /* rememeber end point */
/* find starting point */
cx = c - 1;
/* find parameter name */
while(is_whitespace(*cx) != 1) {
if(*cx == '"') { /* skip quoted string */
cx--;
if(cx < data) error(1,ERROR_CONFIG,"Unterminated quote in config");
while(cx[0] != '"') {
if(cx == data) error(1,ERROR_CONFIG,"Unterminated quote in config");
if(cx == data + len) continue;
cx--;
}
}
cx--;
if(cx == data) { /* handle case of beginning of file */
cx--;
break;
}
}
out->p[out->n] = cx + 1;
out->n++;
if(out->n == MAX_PARAMETERS) return out; /* out of space */
c = cz;
}
}
return out;
}
/* reduce memory footprint */
char *dfile_shrink(dfile_t *d) {
/* shrink arrays */
d->p = realloc(d->p,sizeof(char*) * d->n);
d->v = realloc(d->v,sizeof(char*) * d->n);
/* calculate total size of new data storage */
size_t ttl = 0;
int x;
for(x=0;x<d->n;x++) {
ttl += strlen(d->p[x]);
ttl += strlen(d->v[x]);
ttl += 2; /* for null terminators */
}
ttl++;
/* move everything and update pointers */
char *newdata = smalloc(ttl); /* new storage */
char *c = newdata; /* cursor*/
for(x=0;x<d->n;x++) {
/* copy parameter */
strcpy(c,d->p[x]);
d->p[x] = c;
c += (strlen(c) + 1);
/* copy value */
strcpy(c,d->v[x]);
d->v[x] = c;
c += (strlen(c) + 1);
}
return newdata;
}
inline int is_whitespace(char ch) {
if(ch == 0 || ch == ' ' || ch == '\n' || ch == '=') return 1;
return 0;
}
/* read file into memory */
char *load_file(char *filename) {
FILE *fdesc;
if(filename == NULL) return NULL;
fdesc = fopen(filename, "r");
if(fdesc == NULL) return NULL;
fseek(fdesc, 0L, SEEK_END);
int flength = ftell(fdesc);
if(flength == -1) {
fclose(fdesc);
return NULL;
}
rewind(fdesc);
char *buf = smalloc(sizeof(char) * ( flength + 1));
if(fread(buf,1,flength,fdesc) != flength) {
free(buf);
fclose(fdesc);
return NULL;
}
fclose(fdesc);
buf[flength] = 0;
return buf;
}
char *value_by_parameter(char *str, dfile_t *d) {
int x;
for(x=0;x<d->n;x++) {
if(rf_strcmp(str,d->p[x]) == 1) return d->v[x];
}
return NULL;
}
void print_config(dfile_t *d) {
printf("config list has %i parsed options:-------------\n",d->n);
int x;
for(x=0;x<d->n;x++) printf("p(arameter):%s v(alue):%s\n",d->p[x],d->v[x]);
printf("----------end config\n");
}