Hi, I have the following C code, which does the following :- Takes the brt file name from character 1 of the input filename (ALLSMFAS.ref) and creates a new file (A.brt) as follows :- ALLSMFAS.ref ----------------- AD,B,0424,0415,89375,,A,2,,80,, AD,B,0424,0417,89375,,A,1,,82,, AD,B,0416,0410,89375,,B,2,,-7,2, BN,B,0135,0094,65625,,D,,,0,1,H BN,B,0338,0337,65824,,B,,,-18,1, BN,B,0334,0339,65824,,C,,,65,, CA,T,,SREC,47221,,C,,R,0,, CA,T,,X171,47221,,A,6,,60,, CA,T,,X173,47221,,A,5,,60,, CC,B,1783,1574,48231,,C,1,,60,, CC,B,1783,1576,48231,,C,2,,60,, CC,B,1783,1578,48231,,C,3,,60,, A.brt ------ B0424041589375 B0424041789375 B0416041089375 B0135009465625 B0338033765824 B0334033965824 T SREC47221 T X17147221 T X17347221 B1783157448231 B1783157648231 B1783157848231 Code: #include "p2geog.h" #define max_smf_lines 1000 * td_max // Reformat the structure of smf_file_layout struct smf_file_layout { char line_type[2]; char step_type; char from_berth[4]; char to_berth[4]; char stanox[5]; char event_type; char thru_line; char platform_id; int event_time_offset; char forward_line; char forward_route; unsigned long sort_key; }; struct tds_from_smf { char td_id[2]; int sfl_ind; int sfl_rec_count; }; struct smf_file_layout sfl[max_smf_lines]; struct tds_from_smf tds_ive_seen[td_max]; int sfl_count; extern HWND main_handle; extern char berth_step_dir[], td_maps_dir[]; extern BOOL gen_brt_files; extern struct td_header_tree tdh[td_max]; extern struct td_map_tree tdm[td_map_max]; extern struct adjacent_maps *am[]; extern int map_count, adj_map_count, td_header_count; extern FILE *file_handle; void generate_brt_files(void) { char f_name[MAX_PATH], this_td[3]; // buffer[200]; FILE *ref_file; WIN32_FIND_DATA wfd; HANDLE find_handle; int seen_td_count = 0, cnt; // ptr, // knt; if (gen_brt_files) { if (!berth_step_dir[0]) { MessageBox(main_handle, "No location has been set for the berth stepping files.", "Error,,,", MB_ICONERROR | MB_OK); return; } memset(&wfd, 0, sizeof(WIN32_FIND_DATA)); // Change the input file type format. wsprintf(f_name, "%sallsmf*.ref", berth_step_dir); if ((find_handle = FindFirstFile(f_name, &wfd)) == INVALID_HANDLE_VALUE) { MessageBox(main_handle, "No SMART berth stepping files found.", "Error...", MB_ICONERROR | MB_OK); return; } sfl_count = 0; memset(tds_ive_seen, 0, sizeof(tds_ive_seen)); memset(sfl, 0, sizeof(sfl)); while (1) { wsprintf(f_name, "%s%s", berth_step_dir, wfd.cFileName); if (ref_file = fopen(f_name, "rb")) { // Take the brt file name from character 1 of the input filename. memcpy(this_td, wfd.cFileName, 1); this_td[2] = 0; for (cnt = 0; cnt < seen_td_count; cnt++) { if (!memicmp(&this_td, &tds_ive_seen[cnt].td_id, 2)) break; } if (cnt >= seen_td_count) { // only process the file if we haven't seen this TD already memcpy(&tds_ive_seen[seen_td_count].td_id, this_td, 2); tds_ive_seen[seen_td_count].sfl_ind = sfl_count; read_smf_file(ref_file); tds_ive_seen[seen_td_count].sfl_rec_count = sfl_count - tds_ive_seen[seen_td_count].sfl_ind; if (gen_brt_files) write_brt_file(seen_td_count); seen_td_count++; } fclose(ref_file); } if (!FindNextFile(find_handle, &wfd)) break; } FindClose(find_handle); } // end if (gen_brt_files) else { gen_brt_files = FALSE; wsprintf(f_name, "%std_ind.tmp", td_maps_dir); save_file(f_name); do_td_index(); wsprintf(f_name, "%std_ind.new", td_maps_dir); file_handle = fopen(f_name, "rb"); process_td_index(); draw_tree(); } } BOOL read_smf_file(FILE *file) { char buffer[100], *ptr, *mem; unsigned int knt; while (!feof(file)) { memset(&buffer, 0, sizeof(buffer)); fgets(buffer, sizeof(buffer), file); memset(&sfl[sfl_count], ' ', sizeof(struct smf_file_layout)); // Remove the stanox_int sfl[sfl_count].event_time_offset = sfl[sfl_count].sort_key = 0; for (knt = 0; knt < strlen(buffer); knt++) { if (buffer[knt + 1] == 13 || buffer[knt + 1] == 10) break; if ((buffer[knt] == ',') && (buffer[knt + 1] == ',')) { memmove(&buffer[knt + 2], &buffer[knt + 1], strlen(buffer) - knt); buffer[knt + 1] = ' '; } } ptr = buffer; if ((mem = strtok(ptr, ",")) && (mem[0] > ' ')) memcpy(sfl[sfl_count].line_type, mem, 2); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) memcpy(&sfl[sfl_count].step_type, mem, 1); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) memcpy(&sfl[sfl_count].from_berth, mem, 4); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) memcpy(sfl[sfl_count].to_berth, mem, 4); // Remove the trust_event, rttm_event, stanox_int, // tiploc and direction if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) { memcpy(sfl[sfl_count].stanox, mem, 5); } if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) memcpy(&sfl[sfl_count].event_type, mem, 1); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) memcpy(&sfl[sfl_count].thru_line, mem, 1); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) memcpy(&sfl[sfl_count].platform_id, mem, 1); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) sfl[sfl_count].event_time_offset = atoi(mem); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) memcpy(&sfl[sfl_count].forward_line, mem, 1); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) memcpy(&sfl[sfl_count].forward_route, mem, 1); if ((mem = strtok(NULL, ",")) && (mem[0] > ' ')) sfl[sfl_count].sort_key = atoi(mem); sfl_count++; } return TRUE; } BOOL write_brt_file(int tis_ind) { FILE *brt_file; char f_name[MAX_PATH], buffer[100]; int cnt, last_rec; wsprintf(f_name, "%s%.2s.brt", berth_step_dir, tds_ive_seen[tis_ind].td_id); if (brt_file = fopen(f_name, "wb")) { last_rec = tds_ive_seen[tis_ind].sfl_rec_count + tds_ive_seen[tis_ind].sfl_ind; for (cnt = tds_ive_seen[tis_ind].sfl_ind; cnt < last_rec; cnt++) { wsprintf(buffer, "%c%.4s%.4s%.5s ", sfl[cnt].step_type, sfl[cnt].from_berth, sfl[cnt].to_berth, sfl[cnt].stanox); fwrite(buffer, 19, 1, brt_file); } fclose(brt_file); } else { MessageBox(main_handle, "Unable to open file for writing", f_name, MB_ICONERROR | MB_OK); return FALSE; } return TRUE; } But now, I need to create output files from the column 1 of the input file and each time the value in column 1 changes, a new file is created. So for input file :- ALLSMFAS.ref ---------------- AD,B,0424,0415,89375,,A,2,,80,, AD,B,0424,0417,89375,,A,1,,82,, AD,B,0416,0410,89375,,B,2,,-7,2, BN,B,0135,0094,65625,,D,,,0,1,H BN,B,0338,0337,65824,,B,,,-18,1, BN,B,0334,0339,65824,,C,,,65,, CA,T,,SREC,47221,,C,,R,0,, CA,T,,X171,47221,,A,6,,60,, CA,T,,X173,47221,,A,5,,60,, CC,B,1783,1574,48231,,C,1,,60,, CC,B,1783,1576,48231,,C,2,,60,, CC,B,1783,1578,48231,,C,3,,60,, : : the following needs to be the output files. AD.brt ------ B0424041589375 B0424041789375 B0416041089375 BN.brt ------ B0135009465625 B0338033765824 B0334033965824 CA.brt ------ T SREC47221 T X17147221 T X17347221 CC.brt ------ B1783157448231 B1783157648231 B1783157848231 and so on .... In the above code, I am stuck up at the following place, where I believe the logic for reading the first column of the file and for each change in the value, a new file is created has to be put. Code: // Take the brt file name from character 1 of the input filename. memcpy(this_td, wfd.cFileName, 1); this_td[2] = 0; Request you, if you could please help me with the appropriate code for this. Thanks a lot. Marconi.
Struggling to follow your code. I like to use state machines for this kind of thing; it makes code a lot clearer (well for me anyway). Anyway, what you're going to have to do is to open the input file and read it line by line, at each line deciding if you're going to use the currently opened BRT file or to create a new one, then derive the BRT filename from the line just read in from the input file.