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Gene Selkov's CUBE datatype (GiST example code)

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This commit is contained in:
Tom Lane
2000-12-11 20:39:15 +00:00
parent 5bb4f723d2
commit 9892ddf5ee
12 changed files with 6475 additions and 0 deletions
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79
contrib/cube/buffer.c Normal file
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/* This module defines the parse buffer and routines for setting/reading it */
#include "postgres.h"
#include "utils/elog.h"
static char * PARSE_BUFFER;
static char * PARSE_BUFFER_PTR;
static unsigned int PARSE_BUFFER_SIZE;
static unsigned int SCANNER_POS;
void set_parse_buffer( char* s );
void reset_parse_buffer( void );
int read_parse_buffer( void );
char * parse_buffer( void );
char * parse_buffer_ptr( void );
unsigned int parse_buffer_curr_char( void );
unsigned int parse_buffer_size( void );
unsigned int parse_buffer_pos( void );
extern void cube_flush_scanner_buffer(void); /* defined in cubescan.l */
void set_parse_buffer( char* s )
{
PARSE_BUFFER = s;
PARSE_BUFFER_SIZE = strlen(s);
if ( PARSE_BUFFER_SIZE == 0 ) {
elog(ERROR, "cube_in: can't parse an empty string");
}
PARSE_BUFFER_PTR = PARSE_BUFFER;
SCANNER_POS = 0;
}
void reset_parse_buffer( void )
{
PARSE_BUFFER_PTR = PARSE_BUFFER;
SCANNER_POS = 0;
cube_flush_scanner_buffer();
}
int read_parse_buffer( void )
{
int c;
/*
c = *PARSE_BUFFER_PTR++;
SCANNER_POS++;
*/
c = PARSE_BUFFER[SCANNER_POS];
if(SCANNER_POS < PARSE_BUFFER_SIZE)
SCANNER_POS++;
return c;
}
char * parse_buffer( void )
{
return PARSE_BUFFER;
}
unsigned int parse_buffer_curr_char( void )
{
return PARSE_BUFFER[SCANNER_POS];
}
char * parse_buffer_ptr( void )
{
return PARSE_BUFFER_PTR;
}
unsigned int parse_buffer_pos( void )
{
return SCANNER_POS;
}
unsigned int parse_buffer_size( void )
{
return PARSE_BUFFER_SIZE;
}