This C code defines a function called "formatear_sql_statement" that takes in a character pointer and returns a formatted SQL statement string. It removes whitespace from the input, and inserts newline characters before certain SQL keywords like "SELECT", "FROM", etc. to make the statement more readable. Local variables are used to track positions within the strings and characters as it iterates through the input to add formatting and build up the output SQL statement string.

1. funct_format_sql_statement.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "constant_definition.h"
#include "case_constant_definition.h"
#include "case_constant_sql_stmt_def.h"
#include "constant_oracle_versions.h"
extern vaciar_cadena();
extern pasar_amayus ();
extern stmtsqlncmp ();
char *formatear_sql_statement ( void *punt_cadena )
{
static char order_stmt [MAX_STMT_SIZE];
static char auxi_stmt [MAX_STMT_SIZE];
static char auxiliar [MAX_WORD_STMT];
int profu_parent =0;
int profu_comita =0;
int profu_comilla =0;
int contador_blanco =0;
int largo_cadena=0;
int posicion1=0;
int posicion2=0;
int posicion3=0;
int caracter=0;
largo_cadena = (int )strlen ((char *) punt_cadena);
vaciar_cadena (order_stmt, MAX_STMT_SIZE);
vaciar_cadena (auxi_stmt, MAX_STMT_SIZE);
posicion2=0;
/* ************ Quitando espacios en blanco ************* */
for (posicion1=0; posicion1 <= largo_cadena; posicion1++)
{
caracter = ((char *) punt_cadena )[posicion1];
if ( caracter == ASCII_SPACE )
if ( contador_blanco == 0 )
{
contador_blanco++;
auxi_stmt [posicion2]=caracter;
posicion2++;
}
if ( caracter != ASCII_SPACE)
{
contador_blanco=0;
auxi_stmt[posicion2]=caracter;
posicion2++;
}
}
auxi_stmt[posicion2]=ASCII_FIN_LINEA;
/* ************ ||||||||||||||||||||||||||| ************* */
largo_cadena=(int )strlen(auxi_stmt);
posicion2=0;
posicion3=0;
vaciar_cadena (auxiliar,MAX_WORD_STMT);
for (posicion1=0; posicion1 <= largo_cadena; posicion1++)
{
caracter = auxi_stmt [posicion1];
/* printf ("C [%c=%d] ",caracter,caracter); */
if ( caracter != ASCII_SPACE )
{
auxiliar[posicion3] = caracter;
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2. funct_format_sql_statement.c
/* order_stmt[posicion2] = caracter;
posicion2++;
order_stmt[posicion2] = ASCII_FIN_LINEA;
*/
posicion3++;
auxiliar[posicion3] = ASCII_FIN_LINEA;
}
else if (caracter == ASCII_SPACE )
{
if ( ( stmtsqlncmp (auxiliar,"select",6)==0 ) )
{
strcat (order_stmt," n");
strcat (order_stmt,auxiliar);
strcat (order_stmt," n");
posicion3=0;
vaciar_cadena (auxiliar,MAX_WORD_STMT);
}
else if ( (stmtsqlncmp (auxiliar,"from",4)==0 ) )
{
strcat (order_stmt," n");
strcat (order_stmt,auxiliar);
strcat (order_stmt," n");
posicion3=0;
vaciar_cadena (auxiliar,MAX_WORD_STMT);
}
else if ( (stmtsqlncmp (auxiliar,"where",5)==0 ) )
{
strcat (order_stmt," n");
strcat (order_stmt,auxiliar);
strcat (order_stmt," n");
posicion3=0;
vaciar_cadena (auxiliar,MAX_WORD_STMT);
}
else if ( (stmtsqlncmp (auxiliar,"group",5)==0) )
{
strcat (order_stmt," n");
strcat (order_stmt,auxiliar);
strcat (order_stmt," n");
posicion3=0;
vaciar_cadena (auxiliar,MAX_WORD_STMT);
}
else if ( (stmtsqlncmp (auxiliar,"order",5)==0) )
{
strcat (order_stmt," n");
strcat (order_stmt,auxiliar);
strcat (order_stmt," n");
posicion3=0;
vaciar_cadena (auxiliar,MAX_WORD_STMT);
}
strcat (order_stmt,auxiliar);
strcat (order_stmt," ");
posicion3=0;
vaciar_cadena (auxiliar,MAX_WORD_STMT);
}
}
return (order_stmt);
}
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