int8.c
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:7k
- /*-------------------------------------------------------------------------
- *
- * int8.c--
- * Internal 64-bit integer operations
- *
- *-------------------------------------------------------------------------
- */
- #include <stdio.h> /* for sprintf proto, etc. */
- #include <stdlib.h> /* for strtod, etc. */
- #include <string.h>
- #include <ctype.h>
- #include <time.h>
- #include <math.h>
- #include <float.h>
- #include <limits.h>
- #include "postgres.h"
- #include "utils/palloc.h"
- #define MAXINT8LEN 25
- #if defined(__alpha) || defined(__GNUC__)
- #define HAVE_64BIT_INTS 1
- #endif
- #ifndef HAVE_64BIT_INTS
- typedef char[8]
- int64;
- #elif defined(__alpha)
- typedef long int int64;
- #define INT64_FORMAT "%ld"
- #elif defined(__GNUC__)
- typedef long long int int64;
- #define INT64_FORMAT "%Ld"
- #else
- typedef long int int64;
- #define INT64_FORMAT "%ld"
- #endif
- int64 *int8in(char *str);
- char *int8out(int64 *val);
- bool int8eq(int64 *val1, int64 *val2);
- bool int8ne(int64 *val1, int64 *val2);
- bool int8lt(int64 *val1, int64 *val2);
- bool int8gt(int64 *val1, int64 *val2);
- bool int8le(int64 *val1, int64 *val2);
- bool int8ge(int64 *val1, int64 *val2);
- bool int84eq(int64 *val1, int32 val2);
- bool int84ne(int64 *val1, int32 val2);
- bool int84lt(int64 *val1, int32 val2);
- bool int84gt(int64 *val1, int32 val2);
- bool int84le(int64 *val1, int32 val2);
- bool int84ge(int64 *val1, int32 val2);
- int64 *int8um(int64 *val);
- int64 *int8pl(int64 *val1, int64 *val2);
- int64 *int8mi(int64 *val1, int64 *val2);
- int64 *int8mul(int64 *val1, int64 *val2);
- int64 *int8div(int64 *val1, int64 *val2);
- int64 *int48(int32 val);
- int32 int84(int64 *val);
- #if FALSE
- int64 *int28 (int16 val);
- int16 int82(int64 *val);
- #endif
- float64 i8tod(int64 *val);
- int64 *dtoi8(float64 val);
- /***********************************************************************
- **
- ** Routines for 64-bit integers.
- **
- ***********************************************************************/
- /*----------------------------------------------------------
- * Formatting and conversion routines.
- *---------------------------------------------------------*/
- /* int8in()
- */
- int64 *
- int8in(char *str)
- {
- int64 *result = palloc(sizeof(int64));
- #if HAVE_64BIT_INTS
- if (!PointerIsValid(str))
- elog(ERROR, "Bad (null) int8 external representation", NULL);
- if (sscanf(str, INT64_FORMAT, result) != 1)
- elog(ERROR, "Bad int8 external representation '%s'", str);
- #else
- elog(ERROR, "64-bit integers are not supported", NULL);
- result = NULL;
- #endif
- return (result);
- } /* int8in() */
- /* int8out()
- */
- char *
- int8out(int64 *val)
- {
- char *result;
- int len;
- char buf[MAXINT8LEN + 1];
- #if HAVE_64BIT_INTS
- if (!PointerIsValid(val))
- return (NULL);
- if ((len = snprintf(buf, MAXINT8LEN, INT64_FORMAT, *val)) < 0)
- elog(ERROR, "Unable to format int8", NULL);
- result = palloc(len + 1);
- strcpy(result, buf);
- #else
- elog(ERROR, "64-bit integers are not supported", NULL);
- result = NULL;
- #endif
- return (result);
- } /* int8out() */
- /*----------------------------------------------------------
- * Relational operators for int8s.
- *---------------------------------------------------------*/
- /* int8relop()
- * Is val1 relop val2?
- */
- bool
- int8eq(int64 *val1, int64 *val2)
- {
- return (*val1 == *val2);
- } /* int8eq() */
- bool
- int8ne(int64 *val1, int64 *val2)
- {
- return (*val1 != *val2);
- } /* int8ne() */
- bool
- int8lt(int64 *val1, int64 *val2)
- {
- return (*val1 < *val2);
- } /* int8lt() */
- bool
- int8gt(int64 *val1, int64 *val2)
- {
- return (*val1 > *val2);
- } /* int8gt() */
- bool
- int8le(int64 *val1, int64 *val2)
- {
- return (*val1 <= *val2);
- } /* int8le() */
- bool
- int8ge(int64 *val1, int64 *val2)
- {
- return (*val1 >= *val2);
- } /* int8ge() */
- /* int84relop()
- * Is 64-bit val1 relop 32-bit val2?
- */
- bool
- int84eq(int64 *val1, int32 val2)
- {
- return (*val1 == val2);
- } /* int84eq() */
- bool
- int84ne(int64 *val1, int32 val2)
- {
- return (*val1 != val2);
- } /* int84ne() */
- bool
- int84lt(int64 *val1, int32 val2)
- {
- return (*val1 < val2);
- } /* int84lt() */
- bool
- int84gt(int64 *val1, int32 val2)
- {
- return (*val1 > val2);
- } /* int84gt() */
- bool
- int84le(int64 *val1, int32 val2)
- {
- return (*val1 <= val2);
- } /* int84le() */
- bool
- int84ge(int64 *val1, int32 val2)
- {
- return (*val1 >= val2);
- } /* int84ge() */
- /*----------------------------------------------------------
- * Arithmetic operators on 64-bit integers.
- *---------------------------------------------------------*/
- int64 *
- int8um(int64 *val)
- {
- int64 *result = palloc(sizeof(int64));
- if (!PointerIsValid(val))
- return NULL;
- *result = (-*val);
- return (result);
- } /* int8um() */
- int64 *
- int8pl(int64 *val1, int64 *val2)
- {
- int64 *result = palloc(sizeof(int64));
- if ((!PointerIsValid(val1)) || (!PointerIsValid(val2)))
- return NULL;
- *result = *val1 + *val2;
- return (result);
- } /* int8pl() */
- int64 *
- int8mi(int64 *val1, int64 *val2)
- {
- int64 *result = palloc(sizeof(int64));
- if ((!PointerIsValid(val1)) || (!PointerIsValid(val2)))
- return NULL;
- *result = *val1 - *val2;
- return (result);
- } /* int8mi() */
- int64 *
- int8mul(int64 *val1, int64 *val2)
- {
- int64 *result = palloc(sizeof(int64));
- if ((!PointerIsValid(val1)) || (!PointerIsValid(val2)))
- return NULL;
- *result = *val1 * *val2;
- return (result);
- } /* int8mul() */
- int64 *
- int8div(int64 *val1, int64 *val2)
- {
- int64 *result = palloc(sizeof(int64));
- if ((!PointerIsValid(val1)) || (!PointerIsValid(val2)))
- return NULL;
- *result = *val1 / *val2;
- return (result);
- } /* int8div() */
- /*----------------------------------------------------------
- * Conversion operators.
- *---------------------------------------------------------*/
- int64 *
- int48(int32 val)
- {
- int64 *result = palloc(sizeof(int64));
- *result = val;
- return (result);
- } /* int48() */
- int32
- int84(int64 *val)
- {
- int32 result;
- if (!PointerIsValid(val))
- elog(ERROR, "Invalid (null) int64, can't convert int8 to int4", NULL);
- if ((*val < INT_MIN) || (*val > INT_MAX))
- elog(ERROR, "int8 conversion to int4 is out of range", NULL);
- result = *val;
- return (result);
- } /* int84() */
- #if FALSE
- int64 *
- int28 (int16 val)
- {
- int64 *result;
- if (!PointerIsValid(result = palloc(sizeof(int64))))
- elog(ERROR, "Memory allocation failed, can't convert int8 to int2", NULL);
- *result = val;
- return (result);
- } /* int28() */
- int16
- int82(int64 *val)
- {
- int16 result;
- if (!PointerIsValid(val))
- elog(ERROR, "Invalid (null) int8, can't convert to int2", NULL);
- result = *val;
- return (result);
- } /* int82() */
- #endif
- float64
- i8tod(int64 *val)
- {
- float64 result = palloc(sizeof(float64data));
- *result = *val;
- return (result);
- } /* i8tod() */
- int64 *
- dtoi8(float64 val)
- {
- int64 *result = palloc(sizeof(int64));
- if ((*val < (-pow(2, 64) + 1)) || (*val > (pow(2, 64) - 1)))
- elog(ERROR, "Floating point conversion to int64 is out of range", NULL);
- *result = *val;
- return (result);
- } /* dtoi8() */