102 lines
2.0 KiB
C
102 lines
2.0 KiB
C
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/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: myddas_mysql.c *
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* Last rev: 22/03/05 *
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* mods: *
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* comments: Predicates for comunicating with a mysql database system *
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* *
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*************************************************************************/
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#include <string.h>
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#include <stdlib.h>
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#include <mysql/mysql.h>
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/* Auxilary function to table_write*/
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static void
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n_print(Int , char );
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/* Auxilary function to table_write*/
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static void
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n_print(Int n, char c)
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{
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for(;n>0;n--) printf("%c",c);
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}
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void
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myddas_util_table_write(MYSQL_RES *res_set){
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MYSQL_ROW row;
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MYSQL_FIELD *fields;
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Int i,f;
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if (mysql_num_rows(res_set) == 0)
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{
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printf ("Empty Set\n");
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return;
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}
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f = mysql_num_fields(res_set);
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fields = mysql_fetch_field(res_set);
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for(i=0;i<f;i++)
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{
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printf("+");
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if (strlen(fields[i].name)>fields[i].max_length) fields[i].max_length=strlen(fields[i].name);
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n_print(fields[i].max_length+2,'-');
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}
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printf("+\n");
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for(i=0;i<f;i++)
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{
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printf("|");
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printf(" %s ",fields[i].name);
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n_print(fields[i].max_length - strlen(fields[i].name),' ');
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}
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printf("|\n");
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for(i=0;i<f;i++)
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{
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printf("+");
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n_print(fields[i].max_length+2,'-');
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}
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printf("+\n");
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while ((row = mysql_fetch_row(res_set)) != NULL)
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{
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for(i=0;i<f;i++)
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{
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printf("|");
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if (row[i] != NULL)
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{
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printf(" %s ",row[i]);
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n_print(fields[i].max_length - strlen(row[i]),' ');
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}
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else
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{
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printf(" NULL ");
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n_print(fields[i].max_length - 4,' ');
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}
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}
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printf("|\n");
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}
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for(i=0;i<f;i++)
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{
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printf("+");
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n_print(fields[i].max_length+2,'-');
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}
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printf("+\n");
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}
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