16 unsigned long long * offset_ptr;
20 struct file_info files[MAX_FILES];
23 int parse_config_input(ezxml_t cfg_input);
24 int write_output(char * filename, ezxml_t cfg_output);
27 printf("Usage: builder <infile> [-o outfile]\n");
30 int main(int argc, char ** argv) {
32 char * outfile = NULL;
35 memset((char *)files, 0, sizeof(files));
39 while ((c = getopt(argc, argv, "ho:")) != -1) {
57 infile = argv[optind];
60 printf("Reading Input file: %s\n", infile);
62 ezxml_t cfg_input = ezxml_parse_file(infile);
64 if (cfg_input == NULL) {
65 printf("Could not open configuration input file: %s\n", infile);
71 if (parse_config_input(cfg_input) == -1) {
72 printf("Error parsing configuration input\n");
81 if (outfile == NULL) {
82 char * endptr = rindex(infile, '.');
84 outfile = malloc(strlen(infile) + strlen(".dat") + 1);
90 sprintf(outfile, "%s.dat", infile);
94 write_output(outfile, cfg_input);
100 char * get_val(ezxml_t cfg, char * tag) {
101 char * attrib = (char *)ezxml_attr(cfg, tag);
102 ezxml_t txt = ezxml_child(cfg, tag);
104 if ((txt != NULL) && (attrib != NULL)) {
105 printf("Invalid Cfg file: Duplicate value for %s (attr=%s, txt=%s)\n",
106 tag, attrib, ezxml_txt(txt));
110 return (attrib == NULL) ? ezxml_txt(txt) : attrib;
114 int write_output(char * filename, ezxml_t cfg_output) {
115 FILE * data_file = fopen(filename, "w+");
116 char * new_cfg_str = ezxml_toxml(cfg_output);
117 unsigned int cfg_len = strlen(new_cfg_str);
118 unsigned long long zero = 0;
120 unsigned long long offset = 0;
121 unsigned long long file_cnt = num_files;
123 fwrite("v3vee\0\0\0", 8, 1, data_file);
126 // printf("New config: \n%s\n", new_cfg_str);
128 fwrite(&cfg_len, sizeof(unsigned int), 1, data_file);
129 offset += sizeof(unsigned int);
131 fwrite(new_cfg_str, cfg_len, 1, data_file);
134 fwrite(&zero, 1, 8, data_file);
137 printf("setting number of files to %llu\n", file_cnt);
138 printf("sizeof(file_cnt)=%d \n", sizeof(file_cnt));
140 fwrite(&file_cnt, 8, 1, data_file);
143 // each index entry is 16 bytes long plus end padding
144 offset += (16 * num_files) + 8;
146 for (i = 0; i < num_files; i++) {
147 fwrite(&i, 4, 1, data_file);
148 fwrite(&(files[i].size), 4, 1, data_file);
149 fwrite(&offset, 8, 1, data_file);
151 offset += files[i].size;
154 fwrite(&zero, 1, 8, data_file);
156 for (i = 0; i < num_files; i++) {
157 if (fwrite(files[i].data, 1, files[i].size, data_file) != files[i].size) {
158 printf("Error writing data file contents");
172 int parse_config_input(ezxml_t cfg_input) {
173 ezxml_t file_tags = NULL;
174 ezxml_t tmp_file_tag = NULL;
176 // files are transformed into blobs that are slapped to the end of the file
178 file_tags = ezxml_child(cfg_input, "files");
180 tmp_file_tag = ezxml_child(file_tags, "file");
182 while (tmp_file_tag) {
183 char * filename = get_val(tmp_file_tag, "filename");
184 struct stat file_stats;
185 FILE * data_file = NULL;
186 char * id = get_val(tmp_file_tag, "id");
189 snprintf(index_buf, 256, "%d", num_files);
192 strncpy(files[num_files].id, ezxml_attr(tmp_file_tag, "id"), 256);
194 printf("file id=%s, name=%s\n",
199 if (stat(filename, &file_stats) != 0) {
204 files[num_files].size = (unsigned int)file_stats.st_size;
205 printf("file size = %d\n", files[num_files].size);
207 files[num_files].data = malloc(files[num_files].size);
209 data_file = fopen(filename, "r");
211 if (fread(files[num_files].data, files[num_files].size, 1, data_file) == 0) {
212 printf("Error reading data file %s\n", filename);
219 ezxml_set_attr_d(tmp_file_tag, "index", index_buf);
222 tmp_file_tag = ezxml_next(tmp_file_tag);