/*
* matdb-dotcode: reads in Craig's Dotcode materials database.
Copyright (C) 2008 Joseph Pingenot
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
*/
#include
#define _GNU_SOURCE
#include
#include
#include
#ifdef DEBUG
#undef DEBUG
#endif
#ifdef DEBUG_2
#undef DEBUG_2
#endif
/*Functions to be used by the hash.*/
static void destroy_string(gpointer data) {
free((char*)data);
}
static void destroy_double(gpointer data){
free((double*)data);
}
static void destroy_inner_bowhash(gpointer data) {
g_hash_table_unref(data);
}
int insert_into_matdb(struct matdb *mdb, struct matdb_material **mat, struct matdb_bowing **bow) {
if((*mat) != NULL) {
#ifdef DEBUG
fprintf(stderr, "inserting material %s\n", (*mat)->name->str);
#endif
g_hash_table_insert(mdb->materials, (gpointer)g_strdup((*mat)->name->str), (gpointer)(*mat));
(*mat) = NULL;
}
if((*bow) != NULL) {
#ifdef DEBUG
fprintf(stderr, "inserting bowing %s:%s\n", (*bow)->from->str, (*bow)->to->str);
#endif
/*Inner table*/
GHashTable *it;
if((it=g_hash_table_lookup(mdb->bowings, (*bow)->from->str)) == NULL) {
if((it = g_hash_table_new_full(&g_str_hash, &g_str_equal, &destroy_string, &destroy_inner_bowhash)) == NULL) {
(*bow) = NULL;
return 1;
}
g_hash_table_insert(mdb->bowings, (*bow)->from->str, it);
#ifdef DEBUG
fprintf(stderr, "Got new hash table (from=%s)\n", (*bow)->from->str);
#endif
}
g_hash_table_insert(it, (gpointer)g_strdup((*bow)->to->str), (gpointer)(*bow));
(*bow) = NULL;
}
return 0;
}
/*Removes leading and trailing whitespace, comments, and reduces
redundant whitespace down to one tab, makes an empty line an empty string.*/
static void prettify_line(char *line) {
register char *look;
register char *write;
register int in_whitespace;
register int leading_whitespace;
for(look=write=line, in_whitespace=0, leading_whitespace=1; *look != '\0'; look++) {
#ifdef DEBUG_2
fprintf(stderr, " look=%d(%c) write=%d(%c) in_whitespace=%d leading_whitespace=%d: ", (look-line), *look, (write-line), *write, in_whitespace, leading_whitespace);
#endif
if(*look == '#') {
#ifdef DEBUG_2
fprintf(stderr, "comment\n");
#endif
*write = '\0';
break;
}
switch(*look) {
case ' ':
case '\n':
case '\t':
#ifdef DEBUG_2
fprintf(stderr, "whitespace\n");
#endif
if((!leading_whitespace) && (!in_whitespace)) *write++ = '\t';
in_whitespace=1;
break;
default:
#ifdef DEBUG_2
fprintf(stderr, "default\n");
#endif
*write++ = *look;
in_whitespace=leading_whitespace=0;
}
}
*write='\0';
for(look=write=line; *look != '\0'; look++) {
switch(*look) {
case ' ':
case '\n':
case '\t':
if(*(look+1) == '\0') {
*look = '\0';
}
}
}
}
/*Error values:
* 0: success
* 1: failure malloc'ing / initializing mdb struct
* 2: failure opening file.
* 4: failure reading line.
* 8: warning reading line: no tab separator (line parsing error)
* 16: warning reading line: bad section declaration
* 32: warning reading line: unable to allocate material struct.
* 64: warning reading line: ignored line (unallocated material struct)
* 128: warning reading line: unable to allocate bowing struct
* 256: warning reading line: ignored line (unallocated bowing struct)
* 512: warning reading file: improper section detected (programming
* error)
*1024: warning reading file: no : separator in bowing materials
* description.
*2048: warning reading file: unable to read numeric value for property.
*/
struct matdb* read_matdb_dotcode(const GString *name, int* err) {
#ifdef DEBUG_2
fprintf(stderr, "in read_matdb_dotcode(%s, %d)\n", name->str, *err);
#endif
*err=0;
struct matdb *mdb = (struct matdb*)malloc(sizeof(struct matdb));
if(mdb == NULL) {*err = 1; return NULL;}
double *value;
if((mdb->materials = g_hash_table_new_full(&g_str_hash, &g_str_equal, &destroy_string, &destroy_material_gpointer)) == NULL) {
*err = 1;
free(mdb);
return NULL;
}
if((mdb->bowings = g_hash_table_new_full(&g_str_hash, &g_str_equal, &destroy_string, &destroy_bowing_gpointer)) == NULL) {
*err = 1;
g_hash_table_unref(mdb->materials);
free(mdb);
return NULL;
}
struct matdb_material *mat = NULL;
struct matdb_bowing *bow = NULL;
/*Valid sections:
* 0 (no/global section)
* 1 (material)
* 2 (bow)
*/
int section=0;
int n;
char *line;
FILE *infile = fopen(name->str, "r");
if(infile == NULL) {
g_hash_table_unref(mdb->materials);
g_hash_table_unref(mdb->bowings);
free(mdb);
*err=2;
return NULL;
#ifdef DEBUG_2
}else{
fprintf(stderr, "infile=%x\n", (unsigned int)infile);
#endif
}
int val;
while(!feof(infile)) {
#ifdef DEBUG
fprintf(stderr, "mat=%x(%s), bow=%x(%s:%s)\n", (unsigned int)mat, mat?mat->name->str:"", (unsigned int)bow, bow?bow->from->str:"", bow?bow->to->str:"");
#endif
line=NULL;
if((val = getline(&line, &n, infile)) == -1) {
#ifdef DEBUG_2
fprintf(stderr, "getline returned %d\n", val);
#endif
if(!feof(infile)) *err = 4;
//fclose(infile);
break;
}
#ifdef DEBUG_2
fprintf(stderr, "line=(%s)\n", line);
#endif
prettify_line(line);
#ifdef DEBUG
fprintf(stderr, "%d: prettified line=(%s)\n", section, line);
#endif
if(*line == '\0') {
free(line);
continue;
}
char *i = index(line, '\t');
if(i == NULL) {
*err &= 8;
}
*i++ = '\0';
/*At this point, we have line which stores the first word on the
line, and i which stores the second word on the line.
*/
char *to;
GHashTable *ht;
#ifdef DEBUG_2
fprintf(stderr, "part_a=(%s) part_b=(%s)\n", line, i);
#endif
/*If we have a material or bowing underway, save it off*/
if(strcasecmp(line, "material") == 0) {
insert_into_matdb(mdb, &mat, &bow);
if((mat = (struct matdb_material*)malloc(sizeof(struct matdb_material))) == NULL) {
*err &= 32;
}
if((mat->name = g_string_new(i)) == NULL) {
*err &= 32;
free(mat);
section=0;
continue;
}
if((mat->properties = g_hash_table_new_full(&g_str_hash, &g_str_equal, &destroy_string, &destroy_double)) == NULL) {
*err &= 32;
g_string_free(mat->name, TRUE);
free(bow);
section=0;
continue;
}
#ifdef DEBUG_2
fprintf(stderr, "new material (%s):\n", i);
#endif
section=1;
}else if(strcasecmp(line, "bow") == 0) {
insert_into_matdb(mdb, &mat, &bow);
if((bow = (struct matdb_bowing*)malloc(sizeof(struct matdb_bowing))) == NULL) {
*err &= 128;
}
if((to = index(i, ':')) == NULL) {
*err &= 1024;
free(bow);
section=0;
continue;
}
*to++ = '\0';
/*Same trick as before, but i now stores the from material,
and to the to material
*/
if((bow->from = g_string_new(i)) == NULL) {
*err &= 128;
free(bow);
section=0;
continue;
}
if((bow->to = g_string_new(to)) == NULL) {
*err &= 128;
g_string_free(bow->from, TRUE);
free(bow);
section=0;
continue;
}
if((bow->properties = g_hash_table_new_full(&g_str_hash, &g_str_equal, &destroy_string, &destroy_double)) == NULL) {
*err &= 128;
g_string_free(bow->to, TRUE);
g_string_free(bow->from, TRUE);
free(bow);
section=0;
continue;
}
#ifdef DEBUG_2
fprintf(stderr, "new bowing (%s:%s):\n", i, to);
#endif
section=2;
}else{
#ifdef DEBUG
fprintf(stderr, "\t%d/%s\t", section, line);
#endif
/*Process a property.*/
switch(section) {
case 1:
#ifdef DEBUG
fprintf(stderr, "(1)\t");
#endif
ht = mat->properties;
break;
case 2:
#ifdef DEBUG
fprintf(stderr, "(2)\t");
#endif
ht = bow->properties;
break;
default:
#ifdef DEBUG
fprintf(stderr, "(default)\t");
#endif
*err &= 16;
section = 0;
}
if(section == 0) {
#ifdef DEBUG
fprintf(stderr, "section was 0\n");
#endif
continue;
}
if((value = (double*)malloc(sizeof(double))) == NULL) {
*err &= 2048;
#ifdef DEBUG
fprintf(stderr, "malloc of value failed\n");
#endif
continue;
}
int num;
if((num=sscanf(i, " %lg", value)) != 1) {
*err &= 2048;
free(value);
#ifdef DEBUG
fprintf(stderr, "bad sscanf to get value (scanned \"%s\", returned %d)\n", i, num);
#endif
continue;
}
g_hash_table_insert(ht, g_strdup(line), value);
#ifdef DEBUG
fprintf(stderr, "%g(%s)\n", *value, line);
#endif
}
free(line);
line=i=to=NULL;
value=NULL;
}
fclose(infile);
insert_into_matdb(mdb, &mat, &bow);
return mdb;
}