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io.c
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io.c
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/* Foma: a finite-state toolkit and library. */
/* Copyright © 2008-2021 Mans Hulden */
/* This file is part of foma. */
/* 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. */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include "foma.h"
#include "zlib.h"
#define TYPE_TRANSITION 1
#define TYPE_SYMBOL 2
#define TYPE_FINAL 3
#define TYPE_PROPERTY 4
#define TYPE_END 5
#define TYPE_ERROR 6
#define READ_BUF_SIZE 4096
struct binaryline {
int type;
int state;
int in;
int target;
int out;
int symbol;
char *name;
char *value;
};
extern char *g_att_epsilon;
struct io_buf_handle {
char *io_buf;
char *io_buf_ptr;
};
struct io_buf_handle *io_init();
void io_free(struct io_buf_handle *iobh);
static int io_gets(struct io_buf_handle *iobh, char *target);
static size_t io_get_gz_file_size(char *filename);
static size_t io_get_file_size(char *filename);
static size_t io_get_regular_file_size(char *filename);
size_t io_gz_file_to_mem (struct io_buf_handle *iobh, char *filename);
int foma_net_print(struct fsm *net, gzFile outfile);
struct fsm *io_net_read(struct io_buf_handle *iobh, char **net_name);
static INLINE int explode_line (char *buf, int *values);
void escape_print(FILE *stream, char* string) {
int i;
if (strchr(string, '"') != NULL) {
for (i = 0; *(string+i) != '\0'; i++) {
if (*(string+i) == '"') {
fprintf(stream, "\\\"");
} else {
fputc(*(string+i), stream);
}
}
} else {
fprintf(stream, "%s", string);
}
}
int foma_write_prolog (struct fsm *net, char *filename) {
struct fsm_state *stateptr;
int i, *finals, *used_symbols, maxsigma;
FILE *out;
char *outstring, *instring, identifier[100];
if (filename == NULL) {
out = stdout;
} else {
if ((out = fopen(filename, "w")) == NULL) {
printf("Error writing to file '%s'. Using stdout.\n", filename);
out = stdout;
}
printf("Writing prolog to file '%s'.\n", filename);
}
fsm_count(net);
maxsigma = sigma_max(net->sigma);
used_symbols = calloc(maxsigma+1,sizeof(int));
finals = malloc(sizeof(int)*(net->statecount));
stateptr = net->states;
identifier[0] = '\0';
strcpy(identifier, net->name);
/* Print identifier */
fprintf(out, "%s%s%s", "network(",identifier,").\n");
for (i=0; (stateptr+i)->state_no != -1; i++) {
if ((stateptr+i)->final_state == 1) {
*(finals+((stateptr+i)->state_no)) = 1;
} else {
*(finals+((stateptr+i)->state_no)) = 0;
}
if ((stateptr+i)->in != -1) {
*(used_symbols+((stateptr+i)->in)) = 1;
}
if ((stateptr+i)->out != -1) {
*(used_symbols+((stateptr+i)->out)) = 1;
}
}
for (i = 3; i <= maxsigma; i++) {
if (*(used_symbols+i) == 0) {
instring = sigma_string(i, net->sigma);
if (strcmp(instring,"0") == 0) {
instring = "%0";
}
fprintf(out, "symbol(%s, \"", identifier);
escape_print(out, instring);
fprintf(out, "\").\n");
}
}
for (; stateptr->state_no != -1; stateptr++) {
if (stateptr->target == -1)
continue;
fprintf(out, "arc(%s, %i, %i, ", identifier, stateptr->state_no, stateptr->target);
if (stateptr->in == 0) instring = "0";
else if (stateptr->in == 1) instring = "?";
else if (stateptr->in == 2) instring = "?";
else instring = sigma_string(stateptr->in, net->sigma);
if (stateptr->out == 0) outstring = "0";
else if (stateptr->out == 1) outstring = "?";
else if (stateptr->out == 2) outstring = "?";
else outstring = sigma_string(stateptr->out, net->sigma);
if (strcmp(instring,"0") == 0 && stateptr->in != 0) instring = "%0";
if (strcmp(outstring,"0") == 0 && stateptr->out != 0) outstring = "%0";
if (strcmp(instring,"?") == 0 && stateptr->in > 2) instring = "%?";
if (strcmp(outstring,"?") == 0 && stateptr->in > 2) outstring = "%?";
/* Escape quotes */
if (net->arity == 2 && stateptr->in == IDENTITY && stateptr->out == IDENTITY) {
fprintf(out, "\"?\").\n");
}
else if (net->arity == 2 && stateptr->in == stateptr->out && stateptr->in != UNKNOWN) {
fprintf(out, "\"");
escape_print(out, instring);
fprintf(out, "\").\n");
}
else if (net->arity == 2) {
fprintf(out, "\"");
escape_print(out, instring);
fprintf(out, "\":\"");
escape_print(out, outstring);
fprintf(out, "\").\n");
}
else if (net->arity == 1) {
fprintf(out, "\"");
escape_print(out, instring);
fprintf(out, "\").\n");
}
}
for (i = 0; i < net->statecount; i++) {
if (*(finals+i)) {
fprintf(out, "final(%s, %i).\n", identifier, i);
}
}
if (filename != NULL) {
fclose(out);
}
free(finals);
free(used_symbols);
return 1;
}
struct fsm *read_att(char *filename) {
struct fsm_construct_handle *h;
struct fsm *net;
int i;
char inword[1024], delimiters[] = "\t", *tokens[6];
FILE *INFILE;
INFILE = fopen(filename, "r");
if (INFILE == NULL) {
return(NULL);
}
h = fsm_construct_init(filename);
while (fgets(inword, 1024, INFILE) != NULL) {
if (inword[strlen(inword)-1] == '\n') {
inword[strlen(inword)-1] = '\0';
}
tokens[0] = strtok(inword, delimiters);
i = 0;
if (tokens[0] != NULL) {
i = 1;
for ( ; ; ) {
tokens[i] = strtok(NULL, delimiters);
if (tokens[i] == NULL) {
break;
}
i++;
if (i == 6)
break;
}
}
if (i == 0) { continue; }
if (i >= 4) {
if (strcmp(tokens[2],g_att_epsilon) == 0)
tokens[2] = "@_EPSILON_SYMBOL_@";
if (strcmp(tokens[3],g_att_epsilon) == 0)
tokens[3] = "@_EPSILON_SYMBOL_@";
fsm_construct_add_arc(h, atoi(tokens[0]), atoi(tokens[1]), tokens[2], tokens[3]);
}
else if (i <= 3 && i > 0) {
fsm_construct_set_final(h,atoi(tokens[0]));
}
}
fsm_construct_set_initial(h,0);
fclose(INFILE);
net = fsm_construct_done(h);
fsm_count(net);
net = fsm_topsort(net);
return(net);
}
struct fsm *fsm_read_prolog (char *filename) {
char buf [1024], temp [1024], in [128], out[128], *temp_ptr, *temp_ptr2;
int arity, source, target, has_net;
struct fsm *outnet;
struct fsm_construct_handle *outh = NULL;
FILE *prolog_file;
has_net = 0;
prolog_file = fopen(filename, "r");
if (prolog_file == NULL) {
return NULL;
}
while (fgets(buf, 1023, prolog_file) != NULL) {
if (strstr(buf, "network(") == buf) {
/* Extract network name */
if (has_net == 1) {
perror("WARNING: prolog file contains multiple nets. Only returning the first one.\n");
break;
} else {
has_net = 1;
}
temp_ptr = strstr(buf, "network(")+8;
temp_ptr2 = strstr(buf, ").");
strncpy(temp, temp_ptr, (temp_ptr2 - temp_ptr));
temp[(temp_ptr2-temp_ptr)] = '\0';
/* Start network */
outh = fsm_construct_init(temp);
}
if (strstr(buf, "final(") == buf) {
temp_ptr = strstr(buf, " ");
temp_ptr++;
temp_ptr2 = strstr(temp_ptr, ").");
strncpy(temp, temp_ptr, (temp_ptr2 - temp_ptr));
temp[(temp_ptr2-temp_ptr)] = '\0';
fsm_construct_set_final(outh, atoi(temp));
}
if (strstr(buf, "symbol(") == buf) {
temp_ptr = strstr(buf, ", \"")+3;
temp_ptr2 = strstr(temp_ptr, "\").");
strncpy(temp, temp_ptr, (temp_ptr2 - temp_ptr));
temp[(temp_ptr2-temp_ptr)] = '\0';
if (strcmp(temp, "%0") == 0)
strcpy(temp, "0");
//printf("special: %s\n",temp);
if (fsm_construct_check_symbol(outh, temp) == -1) {
fsm_construct_add_symbol(outh, temp);
}
continue;
}
if (strstr(buf, "arc(") == buf) {
in[0] = '\0';
out[0] = '\0';
if (strstr(buf, "\":\"") == NULL || strstr(buf, ", \":\").") != NULL) {
arity = 1;
} else {
arity = 2;
}
/* Get source */
temp_ptr = strstr(buf, " ");
temp_ptr++;
temp_ptr2 = strstr(temp_ptr, ",");
strncpy(temp, temp_ptr, (temp_ptr2 - temp_ptr));
temp[(temp_ptr2-temp_ptr)] = '\0';
source = atoi(temp);
/* Get target */
temp_ptr = strstr(temp_ptr2, " ");
temp_ptr++;
temp_ptr2 = strstr(temp_ptr, ",");
strncpy(temp, temp_ptr, (temp_ptr2 - temp_ptr));
temp[(temp_ptr2-temp_ptr)] = '\0';
target = atoi(temp);
temp_ptr = strstr(temp_ptr2, "\"");
temp_ptr++;
if (arity == 2) {
temp_ptr2 = strstr(temp_ptr, "\":");
} else {
temp_ptr2 = strstr(temp_ptr, "\").");
}
strncpy(in, temp_ptr, (temp_ptr2 - temp_ptr));
in[(temp_ptr2 - temp_ptr)] = '\0';
if (arity == 2) {
temp_ptr = strstr(temp_ptr2, ":\"");
temp_ptr += 2;
temp_ptr2 = strstr(temp_ptr, "\").");
strncpy(out, temp_ptr, (temp_ptr2 - temp_ptr));
out[(temp_ptr2 - temp_ptr)] = '\0';
}
if (arity == 1 && (strcmp(in, "?") == 0)) {
strcpy(in,"@_IDENTITY_SYMBOL_@");
}
if (arity == 2 && (strcmp(in, "?") == 0)) {
strcpy(in,"@_UNKNOWN_SYMBOL_@");
}
if (arity == 2 && (strcmp(out, "?") == 0)) {
strcpy(out,"@_UNKNOWN_SYMBOL_@");
}
if (strcmp(in, "0") == 0) {
strcpy(in,"@_EPSILON_SYMBOL_@");
}
if (strcmp(out, "0") == 0) {
strcpy(out,"@_EPSILON_SYMBOL_@");
}
if (strcmp(in, "%0") == 0) {
strcpy(in,"0");
}
if (strcmp(out, "%0") == 0) {
strcpy(out,"0");
}
if (strcmp(in, "%?") == 0) {
strcpy(in,"?");
}
if (strcmp(out, "%?") == 0) {
strcpy(out,"?");
}
if (arity == 1) {
fsm_construct_add_arc(outh, source, target, in, in);
} else {
fsm_construct_add_arc(outh, source, target, in, out);
}
}
}
fclose(prolog_file);
if (has_net == 1) {
fsm_construct_set_initial(outh, 0);
outnet = fsm_construct_done(outh);
fsm_topsort(outnet);
return(outnet);
} else {
return(NULL);
}
}
struct io_buf_handle *io_init() {
struct io_buf_handle *iobh;
iobh = malloc(sizeof(struct io_buf_handle));
(iobh->io_buf) = NULL;
(iobh->io_buf_ptr) = NULL;
return(iobh);
}
void io_free(struct io_buf_handle *iobh) {
if (iobh->io_buf != NULL) {
free(iobh->io_buf);
(iobh->io_buf) = NULL;
}
free(iobh);
}
char *spacedtext_get_next_line(char **text) {
char *t, *ret;
ret = *text;
if (**text == '\0')
return NULL;
for (t = *text; *t != '\0' && *t != '\n'; t++) {
}
if (*t == '\0')
*text = t;
else
*text = t+1;
*t = '\0';
return(ret);
}
char *spacedtext_get_next_token(char **text) {
char *t, *ret;
if (**text == '\0' || **text == '\n')
return NULL;
for ( ; **text == ' ' ; (*text)++) {
}
ret = *text;
for (t = *text; *t != '\0' && *t != '\n' && *t != ' '; t++) {
}
if (*t == '\0' || *t == '\n')
*text = t;
else
*text = t+1;
*t = '\0';
return(ret);
}
struct fsm *fsm_read_spaced_text_file(char *filename) {
struct fsm_trie_handle *th;
char *text, *textorig, *insym, *outsym, *t1, *t2, *l1, *l2;
text = textorig = file_to_mem(filename);
if (text == NULL)
return NULL;
th = fsm_trie_init();
for (;;) {
for ( ; *text != '\0' && *text == '\n'; text++) { }
t1 = spacedtext_get_next_line(&text);
if (t1 == NULL)
break;
if (strlen(t1) == 0)
continue;
t2 = spacedtext_get_next_line(&text);
if (t2 == NULL || strlen(t2) == 0) {
for (l1 = t1; (insym = spacedtext_get_next_token(&l1)) != NULL; ) {
if (strcmp(insym, "0") == 0)
fsm_trie_symbol(th, "@_EPSILON_SYMBOL_@", "@_EPSILON_SYMBOL_@");
else if (strcmp(insym, "%0") == 0)
fsm_trie_symbol(th, "0", "0");
else
fsm_trie_symbol(th, insym, insym);
}
fsm_trie_end_word(th);
} else {
for (l1 = t1, l2 = t2; ; ) {
insym = spacedtext_get_next_token(&l1);
outsym = spacedtext_get_next_token(&l2);
if (insym == NULL && outsym == NULL)
break;
if (insym == NULL || strcmp(insym, "0") == 0)
insym = "@_EPSILON_SYMBOL_@";
if (strcmp(insym, "%0") == 0)
insym = "0";
if (outsym == NULL || strcmp(outsym, "0") == 0)
outsym = "@_EPSILON_SYMBOL_@";
if (strcmp(outsym, "%0") == 0)
outsym = "0";
fsm_trie_symbol(th, insym, outsym);
}
fsm_trie_end_word(th);
}
}
free(textorig);
return(fsm_trie_done(th));
}
struct fsm *fsm_read_text_file(char *filename) {
struct fsm_trie_handle *th;
char *text, *textp1, *textp2;
int lastword;
text = file_to_mem(filename);
if (text == NULL) {
return NULL;
}
textp1 = text;
th = fsm_trie_init();
for (lastword = 0 ; lastword == 0 ; textp1 = textp2+1) {
for (textp2 = textp1 ; *textp2 != '\n' && *textp2 != '\0'; textp2++) {
}
if (*textp2 == '\0') {
lastword = 1;
if (textp2 == textp1)
break;
}
*textp2 = '\0';
if (strlen(textp1) > 0)
fsm_trie_add_word(th, textp1);
}
free(text);
return(fsm_trie_done(th));
}
int fsm_write_binary_file(struct fsm *net, char *filename) {
gzFile outfile;
if ((outfile = gzopen(filename,"wb")) == NULL) {
return(1);
}
foma_net_print(net, outfile);
gzclose(outfile);
return(0);
}
struct fsm *fsm_read_binary_file_multiple(fsm_read_binary_handle fsrh) {
char *net_name;
struct fsm *net;
struct io_buf_handle *iobh;
iobh = (struct io_buf_handle *) fsrh;
net = io_net_read(iobh, &net_name);
if (net == NULL) {
io_free(iobh);
return(NULL);
} else {
free(net_name);
return(net);
}
}
fsm_read_binary_handle fsm_read_binary_file_multiple_init(char *filename) {
struct io_buf_handle *iobh;
fsm_read_binary_handle fsm_read_handle;
iobh = io_init();
if (io_gz_file_to_mem(iobh, filename) == 0) {
io_free(iobh);
return NULL;
}
fsm_read_handle = (void *) iobh;
return(fsm_read_handle);
}
struct fsm *fsm_read_binary_file(char *filename) {
char *net_name;
struct fsm *net;
struct io_buf_handle *iobh;
iobh = io_init();
if (io_gz_file_to_mem(iobh, filename) == 0) {
io_free(iobh);
return NULL;
}
net = io_net_read(iobh, &net_name);
io_free(iobh);
return(net);
}
int save_defined(struct defined_networks *def, char *filename) {
struct defined_networks *d;
gzFile outfile;
if (def == NULL) {
fprintf(stderr, "No defined networks.\n");
return(0);
}
if ((outfile = gzopen(filename, "wb")) == NULL) {
printf("Error opening file %s for writing.\n", filename);
return(-1);
}
printf("Writing definitions to file %s.\n", filename);
for (d = def; d != NULL; d = d->next) {
if (!d->net) {
printf("Skipping definition without network.\n");
continue;
}
strncpy(d->net->name, d->name, FSM_NAME_LEN);
foma_net_print(d->net, outfile);
}
gzclose(outfile);
return(1);
}
int load_defined(struct defined_networks *def, char *filename) {
struct fsm *net;
char *net_name;
struct io_buf_handle *iobh;
iobh = io_init();
printf("Loading definitions from %s.\n",filename);
if (io_gz_file_to_mem(iobh, filename) == 0) {
fprintf(stderr, "File error.\n");
io_free(iobh);
return 0;
}
while ((net = io_net_read(iobh, &net_name)) != NULL) {
add_defined(def, net, net_name);
}
io_free(iobh);
return(1);
}
static INLINE int explode_line(char *buf, int *values) {
int i, j, items;
j = i = items = 0;
for (;;) {
for (i = j; *(buf+j) != ' ' && *(buf+j) != '\0'; j++) { }
if (*(buf+j) == '\0') {
*(values+items) = atoi(buf+i);
items++;
break;
} else{
*(buf+j) = '\0';
*(values+items) = atoi(buf+i);
items++;
j++;
}
}
return(items);
}
/* The file format we use is an extremely simple text format */
/* which is gzip compressed through libz and consists of the following sections: */
/* ##foma-net VERSION##*/
/* ##props## */
/* PROPERTIES LINE */
/* ##sigma## */
/* ...SIGMA LINES... */
/* ##states## */
/* ...TRANSITION LINES... */
/* ##end## */
/* Several networks may be concatenated in one file */
/* The initial identifier is "##foma-net 1.0##" */
/* where 1.0 is the version number for the file format */
/* followed by the line "##props##" */
/* which is followed by a line of space separated integers */
/* which correpond to: */
/* arity arccount statecount linecount finalcount pathcount is_deterministic */
/* is_pruned is_minimized is_epsilon_free is_loop_free is_completed name */
/* where name is used if defined networks are saved/loaded */
/* Following the props line, we accept anything (for future expansion) */
/* until we find ##sigma## */
/* the section beginning with "##sigma##" consists of lines with two fields: */
/* number string */
/* correponding to the symbol number and the symbol string */
/* the section beginning with "##states##" consists of lines of ASCII integers */
/* with 2-5 fields to avoid some redundancy in every line corresponding to a */
/* transition where otherwise state numbers would be unnecessarily repeated and */
/* out symbols also (if in = out as is the case for recognizers/simple automata) */
/* The information depending on the number of fields in the lines is as follows: */
/* 2: in target (here state_no is the same as the last mentioned one and out = in) */
/* 3: in out target (again, state_no is the same as the last mentioned one) */
/* 4: state_no in target final_state (where out = in) */
/* 5: state_no in out target final_state */
/* There is no harm in always using 5 fields; however this will take up more space */
/* As in struct fsm_state, states without transitions are represented as a 4-field: */
/* state_no -1 -1 final_state (since in=out for 4-field lines, out = -1 as well) */
/* AS gzopen will read uncompressed files as well, one can gunzip a file */
/* that contains a network and still read it */
struct fsm *io_net_read(struct io_buf_handle *iobh, char **net_name) {
char buf[READ_BUF_SIZE];
struct fsm *net;
struct fsm_state *fsm;
char *new_symbol;
int i, items, new_symbol_number, laststate, lineint[5], *cm;
int extras;
char last_final = '1';
if (io_gets(iobh, buf) == 0) {
return NULL;
}
net = fsm_create("");
if (strcmp(buf, "##foma-net 1.0##") != 0) {
fsm_destroy(net);
perror("File format error foma!\n");
return NULL;
}
io_gets(iobh, buf);
if (strcmp(buf, "##props##") != 0) {
perror("File format error props!\n");
fsm_destroy(net);
return NULL;
}
/* Properties */
io_gets(iobh, buf);
extras = 0;
sscanf(buf, "%i %i %i %i %i %lld %i %i %i %i %i %i %s", &net->arity, &net->arccount, &net->statecount, &net->linecount, &net->finalcount, &net->pathcount, &net->is_deterministic, &net->is_pruned, &net->is_minimized, &net->is_epsilon_free, &net->is_loop_free, &extras, buf);
strncpy(net->name, buf, FSM_NAME_LEN);
*net_name = strdup(buf);
io_gets(iobh, buf);
net->is_completed = (extras & 3);
net->arcs_sorted_in = (extras & 12) >> 2;
net->arcs_sorted_out = (extras & 48) >> 4;
/* Sigma */
while (strcmp(buf, "##sigma##") != 0) { /* Loop until we encounter ##sigma## */
if (buf[0] == '\0') {
printf("File format error at sigma definition!\n");
fsm_destroy(net);
return NULL;
}
io_gets(iobh, buf);
}
for (;;) {
io_gets(iobh, buf);
if (buf[0] == '#') break;
if (buf[0] == '\0') continue;
new_symbol = strstr(buf, " ");
new_symbol[0] = '\0';
new_symbol++;
if (new_symbol[0] == '\0') {
sscanf(buf,"%i", &new_symbol_number);
sigma_add_number(net->sigma, "\n", new_symbol_number);
} else {
sscanf(buf,"%i", &new_symbol_number);
sigma_add_number(net->sigma, new_symbol, new_symbol_number);
}
}
/* States */
if (strcmp(buf, "##states##") != 0) {
printf("File format error!\n");
return NULL;
}
net->states = malloc(net->linecount*sizeof(struct fsm_state));
fsm = net->states;
laststate = -1;
for (i=0; ;i++) {
io_gets(iobh, buf);
if (buf[0] == '#') break;
/* scanf is just too slow here */
//items = sscanf(buf, "%i %i %i %i %i",&lineint[0], &lineint[1], &lineint[2], &lineint[3], &lineint[4]);
items = explode_line(buf, &lineint[0]);
switch (items) {
case 2:
(fsm+i)->state_no = laststate;
(fsm+i)->in = lineint[0];
(fsm+i)->out = lineint[0];
(fsm+i)->target = lineint[1];
(fsm+i)->final_state = last_final;
break;
case 3:
(fsm+i)->state_no = laststate;
(fsm+i)->in = lineint[0];
(fsm+i)->out = lineint[1];
(fsm+i)->target = lineint[2];
(fsm+i)->final_state = last_final;
break;
case 4:
(fsm+i)->state_no = lineint[0];
(fsm+i)->in = lineint[1];
(fsm+i)->out = lineint[1];
(fsm+i)->target = lineint[2];
(fsm+i)->final_state = lineint[3];
laststate = lineint[0];
last_final = lineint[3];
break;
case 5:
(fsm+i)->state_no = lineint[0];
(fsm+i)->in = lineint[1];
(fsm+i)->out = lineint[2];
(fsm+i)->target = lineint[3];
(fsm+i)->final_state = lineint[4];
laststate = lineint[0];
last_final = lineint[4];
break;
default:
printf("File format error\n");
return NULL;
}
if (laststate > 0) {
(fsm+i)->start_state = 0;
} else if (laststate == -1) {
(fsm+i)->start_state = -1;
} else {
(fsm+i)->start_state = 1;
}
}
if (strcmp(buf, "##cmatrix##") == 0) {
cmatrix_init(net);
cm = net->medlookup->confusion_matrix;
for (;;) {
io_gets(iobh, buf);
if (buf[0] == '#') break;
sscanf(buf,"%i", &i);
*cm = i;
cm++;
}
}
if (strcmp(buf, "##end##") != 0) {
printf("File format error!\n");
return NULL;
}
return(net);
}
static int io_gets(struct io_buf_handle *iobh, char *target) {
int i;
for (i = 0; *((iobh->io_buf_ptr)+i) != '\n' && *((iobh->io_buf_ptr)+i) != '\0'; i++) {
*(target+i) = *((iobh->io_buf_ptr)+i);
}
*(target+i) = '\0';
if (*((iobh->io_buf_ptr)+i) == '\0')
(iobh->io_buf_ptr) = (iobh->io_buf_ptr) + i;
else
(iobh->io_buf_ptr) = (iobh->io_buf_ptr) + i + 1;
return(i);
}
int foma_net_print(struct fsm *net, gzFile outfile) {
struct sigma *sigma;
struct fsm_state *fsm;
int i, maxsigma, laststate, *cm, extras;
/* Header */
gzprintf(outfile, "%s","##foma-net 1.0##\n");
/* Properties */
gzprintf(outfile, "%s","##props##\n");
extras = (net->is_completed) | (net->arcs_sorted_in << 2) | (net->arcs_sorted_out << 4);
gzprintf(outfile,
"%i %i %i %i %i %lld %i %i %i %i %i %i %s\n", net->arity, net->arccount, net->statecount, net->linecount, net->finalcount, net->pathcount, net->is_deterministic, net->is_pruned, net->is_minimized, net->is_epsilon_free, net->is_loop_free, extras, net->name);
/* Sigma */
gzprintf(outfile, "%s","##sigma##\n");
for (sigma = net->sigma; sigma != NULL && sigma->number != -1; sigma = sigma->next) {
gzprintf(outfile, "%i %s\n",sigma->number, sigma->symbol);
}
/* State array */
laststate = -1;
gzprintf(outfile, "%s","##states##\n");
for (fsm = net->states; fsm->state_no !=-1; fsm++) {
if (fsm->state_no != laststate) {
if (fsm->in != fsm->out) {
gzprintf(outfile, "%i %i %i %i %i\n",fsm->state_no, fsm->in, fsm->out, fsm->target, fsm->final_state);
} else {
gzprintf(outfile, "%i %i %i %i\n",fsm->state_no, fsm->in, fsm->target, fsm->final_state);
}
} else {
if (fsm->in != fsm->out) {
gzprintf(outfile, "%i %i %i\n", fsm->in, fsm->out, fsm->target);
} else {
gzprintf(outfile, "%i %i\n", fsm->in, fsm->target);
}
}
laststate = fsm->state_no;
}
/* Sentinel for states */
gzprintf(outfile, "-1 -1 -1 -1 -1\n");
/* Store confusion matrix */
if (net->medlookup != NULL && net->medlookup->confusion_matrix != NULL) {
gzprintf(outfile, "%s","##cmatrix##\n");
cm = net->medlookup->confusion_matrix;
maxsigma = sigma_max(net->sigma)+1;
for (i=0; i < maxsigma*maxsigma; i++) {
gzprintf(outfile, "%i\n", *(cm+i));
}
}
/* End */
gzprintf(outfile, "%s","##end##\n");
return(1);
}
int net_print_att(struct fsm *net, FILE *outfile) {
struct fsm_state *fsm;
struct fsm_sigma_list *sl;
int i, prev;
fsm = net->states;
sl = sigma_to_list(net->sigma);
if (sigma_max(net->sigma) >= 0) {
(sl+0)->symbol = g_att_epsilon;
}
for (i=0; (fsm+i)->state_no != -1; i++) {
if ((fsm+i)->target != -1) {
fprintf(outfile, "%i\t%i\t%s\t%s\n",(fsm+i)->state_no,(fsm+i)->target, (sl+(fsm+i)->in)->symbol, (sl+(fsm+i)->out)->symbol);
}
}
prev = -1;
for (i=0; (fsm+i)->state_no != -1; prev = (fsm+i)->state_no, i++) {
if ((fsm+i)->state_no != prev && (fsm+i)->final_state == 1) {
fprintf(outfile, "%i\n",(fsm+i)->state_no);
}
}
free(sl);
return(1);
}
static size_t io_get_gz_file_size(char *filename) {
FILE *infile;
size_t numbytes;
unsigned char bytes[4];
unsigned int ints[4], i;
/* The last four bytes in a .gz file shows the size of the uncompressed data */
infile = fopen(filename, "r");
fseek(infile, -4, SEEK_END);
fread(&bytes, 1, 4, infile);
fclose(infile);
for (i = 0 ; i < 4 ; i++) {
ints[i] = bytes[i];
}
numbytes = ints[0] | (ints[1] << 8) | (ints[2] << 16 ) | (ints[3] << 24);
return(numbytes);
}
static size_t io_get_regular_file_size(char *filename) {
FILE *infile;
size_t numbytes;
infile = fopen(filename, "r");
fseek(infile, 0L, SEEK_END);
numbytes = ftell(infile);
fclose(infile);
return(numbytes);
}
static size_t io_get_file_size(char *filename) {
gzFile FILE;
size_t size;
FILE = gzopen(filename, "r");
if (FILE == NULL) {
return(0);
}
if (gzdirect(FILE) == 1) {
gzclose(FILE);
size = io_get_regular_file_size(filename);
} else {
gzclose(FILE);
size = io_get_gz_file_size(filename);
}
return(size);
}
size_t io_gz_file_to_mem(struct io_buf_handle *iobh, char *filename) {
size_t size;
gzFile FILE;
size = io_get_file_size(filename);
if (size == 0) {
return 0;
}
(iobh->io_buf) = malloc((size+1)*sizeof(char));
FILE = gzopen(filename, "rb");
gzread(FILE, iobh->io_buf, size);
gzclose(FILE);
*((iobh->io_buf)+size) = '\0';
iobh->io_buf_ptr = iobh->io_buf;
return(size);
}
typedef struct BOM {
char code[4];
int len;
char* name;
} BOM;
static BOM BOM_codes[] = {
{ { 0xEF, 0xBB, 0xBF }, 3, "UTF-8"},
{ { 0xFF, 0xFE, 0x00, 0x00 }, 4, "UTF-32LE" },
{ { 0x00, 0x00, 0xFE, 0xFF }, 4, "UTF-32BE" },
{ { 0xFF, 0xFE }, 2, "UTF16-LE" },