File indexing completed on 2024-04-28 03:42:53

 /*
     SPDX-FileCopyrightText: 2008 Akarsh Simha <akarshsimha@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 // Program to convert star data stored in a MySQL database into
 // the binary file format used by KStars
 
 #define DB_TBL                "nomad"
 #define DB_DB                 "stardb"
 #define VERBOSE               1
 #define HTM_LEVEL             6
 #define NTRIXELS              32768 // TODO: Change if HTM Level Changes
 #define INDEX_ENTRY_SIZE      12
 #define MYSQL_STARS_PER_QUERY 1000000
 
 #include "binfile.h"
 
 #include <mysql/mysql.h>
 #include <sys/types.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <math.h>
 #include <string.h>
 
 /*
  * struct to store star data, to be written in this format, into the binary file.
  */
 
 typedef struct deepStarData
 {
     int32_t RA;
     int32_t Dec;
     int16_t dRA;
     int16_t dDec;
     int16_t B;
     int16_t V;
 } deepStarData;
 
 /*
  * Dump the data file header.
  *
  * WARNING: Must edit every time the definition of the deepStarData structures changes
  *
  * f : Data file handle
  */
 
 int writeDataFileHeader(FILE *f)
 {
     char ASCII_text[124];
     u_int16_t nfields;
     u_int32_t nindexes;
     int16_t endian_id   = 0x4B53;
     u_int8_t version_no = 1;
 
     if (f == NULL)
         return 0;
 
     nfields = 6;
 
     str2charv(ASCII_text, "KStars Star Data v1.0. To be read using the 32-bit starData structure only.", 124);
     fwrite(ASCII_text, 124, 1, f);
     fwrite(&endian_id, 2, 1, f);
     fwrite(&version_no, 1, 1, f);
     fwrite(&nfields, sizeof(u_int16_t), 1, f);
 
     writeDataElementDescription(f, "RA", 4, DT_INT32, 1000000);
     writeDataElementDescription(f, "Dec", 4, DT_INT32, 100000);
     writeDataElementDescription(f, "dRA", 2, DT_INT16, 10);
     writeDataElementDescription(f, "dDec", 2, DT_INT16, 10);
     writeDataElementDescription(f, "B", 2, DT_INT16, 100);
     writeDataElementDescription(f, "V", 2, DT_INT16, 100);
 
     nindexes = NTRIXELS;
     fwrite(&nindexes, sizeof(u_int32_t), 1, f);
 
     return 1;
 }
 
 int main(int argc, char *argv[])
 {
     /* === Declarations === */
 
     int ret, i, exitflag;
     long int lim;
 
     double Mag;
 
     unsigned long us_header_offset;
     unsigned long usf_trix_begin;
     unsigned long usf_trix_count;
     unsigned long ntrixels;
     int16_t maglim;
     u_int8_t htm_level;
     u_int16_t MSpT_unnamed;
 
     char query[512];
     u_int32_t current_trixel;
 
     /* File streams */
     FILE *f;       /* Pointer to "current" file */
     FILE *usf;     /* Handle to star data file */
     FILE *usfhead; /* Handle to star header file */
 
     /* deepStarData structure */
     deepStarData data;
 
     /* MySQL structures */
     MYSQL link;
     MYSQL_RES *result;
     MYSQL_ROW row;
 
     /* Check the number of arguments */
     if (argc <= 6)
     {
         fprintf(stderr, "USAGE %s DBUserName DBPassword DeepStarDataFile DeepStarHeaderFile DBName [TableName]\n",
                 argv[0]);
         fprintf(stderr, "The database used is a MySQL DB on localhost. The default table name is `nomad`\n");
     }
 
     /* == Open all file streams required == */
     /* Unnamed Star Handling */
     usf = fopen(argv[3], "wb");
     if (usf == NULL)
     {
         fprintf(stderr, "ERROR: Could not open %s [Deep Star Data File] for binary write.\n", argv[3]);
         return 1;
     }
 
     usfhead = fopen(argv[4], "wb");
     if (usfhead == NULL)
     {
         fprintf(stderr, "ERROR: Could not open %s [Deep Star Header File] for binary write.\n", argv[4]);
         fcloseall();
         return 1;
     }
 
     /* MySQL connect */
     if (mysql_init(&link) == NULL)
     {
         fprintf(stderr, "ERROR: Failed to initialize MySQL connection!\n");
         return 1;
     }
 
     ret = mysql_real_connect(&link, "localhost", argv[1], argv[2], argv[5], 0, NULL, 0);
 
     if (!ret)
     {
         fprintf(stderr, "ERROR: MySQL connect failed for the following reason: %s\n", mysql_error(&link));
         fcloseall();
         return 1;
     }
 
     if (mysql_select_db(&link, argv[5]))
     {
         fprintf(stderr, "ERROR: Could not select MySQL database %s. MySQL said: %s", argv[5], mysql_error(&link));
         fcloseall();
         mysql_close(&link);
         return 1;
     }
 
     if (VERBOSE)
         fprintf(stdout, "Size of deepStarData structure: %d\n", sizeof(deepStarData));
 
     /* Write file headers */
     writeDataFileHeader(usfhead);
     us_header_offset = ftell(usfhead);
 
     /* Leave space for / write a deep magnitude limit specification in the data files */
     maglim = (int)(-5.0 * 100);
     fwrite(&maglim, 2, 1, usf); // Bogus entry
 
     /* Write a HTM level specification in the data file */
     htm_level = HTM_LEVEL;
     fwrite(&htm_level, 1, 1, usf);
 
     /* Leave space for a specification of MSpT (Maximum Stars per Trixel) in the data files */
     MSpT_unnamed = 0;
     fwrite(&MSpT_unnamed, 2, 1, usf); // Bogus entry
 
     /* Initialize some variables */
     lim            = 0;
     exitflag       = 0;
     current_trixel = 0;
     usf_trix_count = 0;
     usf_trix_begin =
         2 + 1 +
         2; // The 2 + 1 + 2 is to leave space for deep magnitude limit, HTM Level and MSpT specification. TODO: Change this if things change.
     ntrixels = 0;
 
     /* Recurse over every MYSQL_STARS_PER_QUERY DB entries */
     while (!exitflag)
     {
         /* Build MySQL query for next MYSQL_STARS_PER_QUERY stars */
         sprintf(query,
                 "SELECT `Trixel`, `RA`, `Dec`, `dRA`, `dDec`, `B`, `V`, `UID` FROM `%s` ORDER BY `trixel`, `Mag` ASC "
                 "LIMIT %ld, %d",
                 (argc >= 7) ? argv[6] : DB_TBL, lim, MYSQL_STARS_PER_QUERY);
 
         if (VERBOSE)
         {
             fprintf(stderr, "SQL Query: %s\n", query);
         }
 
         /* Execute MySQL query and get the result */
         mysql_real_query(&link, query, (unsigned int)strlen(query));
         result = mysql_use_result(&link);
 
         if (!result)
         {
             fprintf(stderr, "MySQL returned NULL result: %s\n", mysql_error(&link));
             fcloseall();
             mysql_close(&link);
             return 1;
         }
 
         exitflag = -1;
 
         /* Process the result row by row */
         while (row = mysql_fetch_row(result))
         {
             /* Very verbose details */
             if (VERBOSE > 1)
             {
                 fprintf(stderr, "UID = %s\n", row[12]);
                 for (i = 0; i <= 14; ++i)
                     fprintf(stderr, "\tField #%d = %s\n", i, row[i]);
             }
 
             if (exitflag == -1)
                 exitflag = 0;
 
             /* Write index entries if we've changed trixel */
             u_int32_t new_trixel = atoi(row[0]);
             if (current_trixel != new_trixel)
             {
                 if (VERBOSE)
                 {
                     fprintf(stderr, "Trixel Changed from %d to %s = %d!\n", current_trixel, row[0], new_trixel);
                 }
                 while (new_trixel != current_trixel)
                 {
                     writeIndexEntry(usfhead, current_trixel,
                                     us_header_offset + NTRIXELS * INDEX_ENTRY_SIZE + usf_trix_begin, usf_trix_count);
                     usf_trix_begin = ftell(usf);
                     if (usf_trix_count > MSpT_unnamed)
                         MSpT_unnamed = usf_trix_count;
                     current_trixel++;
                     ntrixels++;
                     usf_trix_count = 0;
                     if (VERBOSE)
                     {
                         fprintf(stderr, "%d %d\n", current_trixel - 1, ntrixels);
                     }
                 }
                 if (VERBOSE)
                 {
                     fprintf(stderr, "Done writing trixel entry\n");
                 }
             }
 
             /* Initializations */
 
             usf_trix_count++;
             f = usf;
 
             /* Convert various fields and make entries into the deepStarData structure */
             str2int32(&data.RA, row[1], 6);
             str2int32(&data.Dec, row[2], 5);
             str2int16(&data.dRA, row[3], 3);
             str2int16(&data.dDec, row[4], 3);
             str2int16(&data.B, row[5], 3);
             str2int16(&data.V, row[6], 3);
 
             int16_t B = data.B;
             int16_t V = data.V;
 
             if (V == 30000)
             {
                 if (B - 1600 > maglim && B != 30000)
                 {
                     maglim = B - 1600;
                 }
             }
             else
             {
                 if (V > maglim)
                 {
                     maglim = V;
                 }
             }
 
             /* Write the data into the appropriate data file and any names into the name file */
             if (VERBOSE)
                 fprintf(stderr, "Writing UID = %s...", row[7]);
             fwrite(&data, sizeof(deepStarData), 1, f);
             if (VERBOSE)
                 fprintf(stderr, "Done.\n");
         }
         mysql_free_result(result);
         lim += MYSQL_STARS_PER_QUERY;
     }
 
     do
     {
         writeIndexEntry(usfhead, current_trixel, us_header_offset + NTRIXELS * INDEX_ENTRY_SIZE + usf_trix_begin,
                         usf_trix_count);
         usf_trix_begin = ftell(usf);
         usf_trix_count = 0;
         current_trixel++;
         ntrixels++;
     } while (current_trixel != NTRIXELS);
 
     if (ntrixels != NTRIXELS)
     {
         fprintf(stderr,
                 "ERROR: Expected %u trixels, but found %u instead. Please redefine NTRIXELS in this program, or check "
                 "the source database for bogus trixels\n",
                 NTRIXELS, ntrixels);
     }
 
     rewind(usf);
     fwrite(&maglim, 2, 1, usf);
     fwrite(&htm_level, 1, 1, usf);
     fwrite(&MSpT_unnamed, 2, 1, usf);
 
     fcloseall();
     mysql_close(&link);
 
     return 0;
 }