int.c
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:10k
- /*-------------------------------------------------------------------------
- *
- * int.c
- * Functions for the built-in integer types.
- *
- * Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- * $Header: /usr/local/cvsroot/pgsql/src/backend/utils/adt/int.c,v 1.21.2.1 1999/08/02 05:24:53 scrappy Exp $
- *
- *-------------------------------------------------------------------------
- */
- /*
- * OLD COMMENTS
- * I/O routines:
- * int2in, int2out, int28in, int28out, int4in, int4out
- * Conversion routines:
- * itoi, int2_text, int4_text
- * Boolean operators:
- * inteq, intne, intlt, intle, intgt, intge
- * Arithmetic operators:
- * intpl, intmi, int4mul, intdiv
- *
- * Arithmetic operators:
- * intmod, int4fac
- *
- * XXX makes massive and possibly unwarranted type promotion assumptions.
- * fix me when we figure out what we want to do about ANSIfication...
- */
- #include "postgres.h"
- #ifdef HAVE_LIMITS_H
- #include <limits.h>
- #endif
- #include "utils/builtins.h"
- #ifndef SHRT_MAX
- #define SHRT_MAX (0x7FFF)
- #endif
- #ifndef SHRT_MIN
- #define SHRT_MIN (-0x8000)
- #endif
- /*****************************************************************************
- * USER I/O ROUTINES *
- *****************************************************************************/
- /*
- * int2in - converts "num" to short
- */
- int32
- int2in(char *num)
- {
- return (int32) pg_atoi(num, sizeof(int16), ' ');
- }
- /*
- * int2out - converts short to "num"
- */
- char *
- int2out(int16 sh)
- {
- char *result;
- result = (char *) palloc(7);/* assumes sign, 5 digits, ' ' */
- itoa((int) sh, result);
- return result;
- }
- /*
- * int28in - converts "num num ..." to internal form
- *
- * Note:
- * Fills any nonexistent digits with NULLs.
- */
- int16 *
- int28in(char *shs)
- {
- int16 *result;
- int nums;
- if (shs == NULL)
- return NULL;
- result = (int16 *) palloc(sizeof(int16[8]));
- if ((nums = sscanf(shs, "%hd%hd%hd%hd%hd%hd%hd%hd",
- &result[0],
- &result[1],
- &result[2],
- &result[3],
- &result[4],
- &result[5],
- &result[6],
- &result[7])) != 8)
- {
- do
- result[nums++] = 0;
- while (nums < 8);
- }
- return result;
- }
- /*
- * int28out - converts internal form to "num num ..."
- */
- char *
- int28out(int16 *shs)
- {
- int num;
- int16 *sp;
- char *rp;
- char *result;
- if (shs == NULL)
- {
- result = (char *) palloc(2);
- result[0] = '-';
- result[1] = ' ';
- return result;
- }
- rp = result = (char *) palloc(8 * 7); /* assumes sign, 5 digits,
- * ' ' */
- sp = shs;
- for (num = 8; num != 0; num--)
- {
- itoa(*sp++, rp);
- while (*++rp != ' ')
- ;
- *rp++ = ' ';
- }
- *--rp = ' ';
- return result;
- }
- /*
- * int44in - converts "num num ..." to internal form
- *
- * Note:
- * Fills any nonexistent digits with NULLs.
- */
- int32 *
- int44in(char *input_string)
- {
- int32 *foo = (int32 *) palloc(4 * sizeof(int32));
- int i = 0;
- i = sscanf(input_string,
- "%d, %d, %d, %d",
- &foo[0],
- &foo[1],
- &foo[2],
- &foo[3]);
- while (i < 4)
- foo[i++] = 0;
- return foo;
- }
- /*
- * int28out - converts internal form to "num num ..."
- */
- char *
- int44out(int32 *an_array)
- {
- int temp = 4;
- char *output_string = NULL;
- int i;
- if (temp > 0)
- {
- char *walk;
- output_string = (char *) palloc(16 * temp); /* assume 15 digits +
- * sign */
- walk = output_string;
- for (i = 0; i < temp; i++)
- {
- itoa(an_array[i], walk);
- while (*++walk != ' ')
- ;
- *walk++ = ' ';
- }
- *--walk = ' ';
- }
- return output_string;
- }
- /*****************************************************************************
- * PUBLIC ROUTINES *
- *****************************************************************************/
- /*
- * int4in - converts "num" to int4
- */
- int32
- int4in(char *num)
- {
- return pg_atoi(num, sizeof(int32), ' ');
- }
- /*
- * int4out - converts int4 to "num"
- */
- char *
- int4out(int32 l)
- {
- char *result;
- result = (char *) palloc(12); /* assumes sign, 10 digits, ' ' */
- ltoa(l, result);
- return result;
- }
- /*
- * ===================
- * CONVERSION ROUTINES
- * ===================
- */
- int32
- i2toi4(int16 arg1)
- {
- return (int32) arg1;
- }
- int16
- i4toi2(int32 arg1)
- {
- if (arg1 < SHRT_MIN)
- elog(ERROR, "i4toi2: '%d' causes int2 underflow", arg1);
- if (arg1 > SHRT_MAX)
- elog(ERROR, "i4toi2: '%d' causes int2 overflow", arg1);
- return (int16) arg1;
- }
- text *
- int2_text(int16 arg1)
- {
- text *result;
- int len;
- char *str;
- str = int2out(arg1);
- len = (strlen(str) + VARHDRSZ);
- result = palloc(len);
- VARSIZE(result) = len;
- memmove(VARDATA(result), str, (len - VARHDRSZ));
- pfree(str);
- return result;
- } /* int2_text() */
- int16
- text_int2(text *string)
- {
- int16 result;
- int len;
- char *str;
- len = (VARSIZE(string) - VARHDRSZ);
- str = palloc(len + 1);
- memmove(str, VARDATA(string), len);
- *(str + len) = ' ';
- result = int2in(str);
- pfree(str);
- return result;
- } /* text_int2() */
- text *
- int4_text(int32 arg1)
- {
- text *result;
- int len;
- char *str;
- str = int4out(arg1);
- len = (strlen(str) + VARHDRSZ);
- result = palloc(len);
- VARSIZE(result) = len;
- memmove(VARDATA(result), str, (len - VARHDRSZ));
- pfree(str);
- return result;
- } /* int4_text() */
- int32
- text_int4(text *string)
- {
- int32 result;
- int len;
- char *str;
- len = (VARSIZE(string) - VARHDRSZ);
- str = palloc(len + 1);
- memmove(str, VARDATA(string), len);
- *(str + len) = ' ';
- result = int4in(str);
- pfree(str);
- return result;
- } /* text_int4() */
- /*
- * =========================
- * BOOLEAN OPERATOR ROUTINES
- * =========================
- */
- /*
- * inteq - returns 1 iff arg1 == arg2
- * intne - returns 1 iff arg1 != arg2
- * intlt - returns 1 iff arg1 < arg2
- * intle - returns 1 iff arg1 <= arg2
- * intgt - returns 1 iff arg1 > arg2
- * intge - returns 1 iff arg1 >= arg2
- */
- bool
- int4eq(int32 arg1, int32 arg2)
- {
- return arg1 == arg2;
- }
- bool
- int4ne(int32 arg1, int32 arg2)
- {
- return arg1 != arg2;
- }
- bool
- int4lt(int32 arg1, int32 arg2)
- {
- return arg1 < arg2;
- }
- bool
- int4le(int32 arg1, int32 arg2)
- {
- return arg1 <= arg2;
- }
- bool
- int4gt(int32 arg1, int32 arg2)
- {
- return arg1 > arg2;
- }
- bool
- int4ge(int32 arg1, int32 arg2)
- {
- return arg1 >= arg2;
- }
- bool
- int2eq(int16 arg1, int16 arg2)
- {
- return arg1 == arg2;
- }
- bool
- int2ne(int16 arg1, int16 arg2)
- {
- return arg1 != arg2;
- }
- bool
- int2lt(int16 arg1, int16 arg2)
- {
- return arg1 < arg2;
- }
- bool
- int2le(int16 arg1, int16 arg2)
- {
- return arg1 <= arg2;
- }
- bool
- int2gt(int16 arg1, int16 arg2)
- {
- return arg1 > arg2;
- }
- bool
- int2ge(int16 arg1, int16 arg2)
- {
- return arg1 >= arg2;
- }
- bool
- int24eq(int32 arg1, int32 arg2)
- {
- return arg1 == arg2;
- }
- bool
- int24ne(int32 arg1, int32 arg2)
- {
- return arg1 != arg2;
- }
- bool
- int24lt(int32 arg1, int32 arg2)
- {
- return arg1 < arg2;
- }
- bool
- int24le(int32 arg1, int32 arg2)
- {
- return arg1 <= arg2;
- }
- bool
- int24gt(int32 arg1, int32 arg2)
- {
- return arg1 > arg2;
- }
- bool
- int24ge(int32 arg1, int32 arg2)
- {
- return arg1 >= arg2;
- }
- bool
- int42eq(int32 arg1, int32 arg2)
- {
- return arg1 == arg2;
- }
- bool
- int42ne(int32 arg1, int32 arg2)
- {
- return arg1 != arg2;
- }
- bool
- int42lt(int32 arg1, int32 arg2)
- {
- return arg1 < arg2;
- }
- bool
- int42le(int32 arg1, int32 arg2)
- {
- return arg1 <= arg2;
- }
- bool
- int42gt(int32 arg1, int32 arg2)
- {
- return arg1 > arg2;
- }
- bool
- int42ge(int32 arg1, int32 arg2)
- {
- return arg1 >= arg2;
- }
- bool
- keyfirsteq(int16 *arg1, int16 arg2)
- {
- return *arg1 == arg2;
- }
- /*
- * int[24]pl - returns arg1 + arg2
- * int[24]mi - returns arg1 - arg2
- * int[24]mul - returns arg1 * arg2
- * int[24]div - returns arg1 / arg2
- */
- int32
- int4um(int32 arg)
- {
- return -arg;
- }
- int32
- int4pl(int32 arg1, int32 arg2)
- {
- return arg1 + arg2;
- }
- int32
- int4mi(int32 arg1, int32 arg2)
- {
- return arg1 - arg2;
- }
- int32
- int4mul(int32 arg1, int32 arg2)
- {
- return arg1 * arg2;
- }
- int32
- int4div(int32 arg1, int32 arg2)
- {
- return arg1 / arg2;
- }
- int32
- int4inc(int32 arg)
- {
- return arg + (int32) 1;
- }
- int16
- int2um(int16 arg)
- {
- return -arg;
- }
- int16
- int2pl(int16 arg1, int16 arg2)
- {
- return arg1 + arg2;
- }
- int16
- int2mi(int16 arg1, int16 arg2)
- {
- return arg1 - arg2;
- }
- int16
- int2mul(int16 arg1, int16 arg2)
- {
- return arg1 * arg2;
- }
- int16
- int2div(int16 arg1, int16 arg2)
- {
- return arg1 / arg2;
- }
- int16
- int2inc(int16 arg)
- {
- return arg + (int16) 1;
- }
- int32
- int24pl(int32 arg1, int32 arg2)
- {
- return arg1 + arg2;
- }
- int32
- int24mi(int32 arg1, int32 arg2)
- {
- return arg1 - arg2;
- }
- int32
- int24mul(int32 arg1, int32 arg2)
- {
- return arg1 * arg2;
- }
- int32
- int24div(int32 arg1, int32 arg2)
- {
- return arg1 / arg2;
- }
- int32
- int42pl(int32 arg1, int32 arg2)
- {
- return arg1 + arg2;
- }
- int32
- int42mi(int32 arg1, int32 arg2)
- {
- return arg1 - arg2;
- }
- int32
- int42mul(int32 arg1, int32 arg2)
- {
- return arg1 * arg2;
- }
- int32
- int42div(int32 arg1, int32 arg2)
- {
- return arg1 / arg2;
- }
- /*
- * int[24]mod - returns arg1 mod arg2
- */
- int32
- int4mod(int32 arg1, int32 arg2)
- {
- return arg1 % arg2;
- }
- int32
- int2mod(int16 arg1, int16 arg2)
- {
- return arg1 % arg2;
- }
- int32
- int24mod(int32 arg1, int32 arg2)
- {
- return arg1 % arg2;
- }
- int32
- int42mod(int32 arg1, int32 arg2)
- {
- return arg1 % arg2;
- }
- /*
- * int[24]fac - returns arg1!
- */
- int32
- int4fac(int32 arg1)
- {
- int32 result;
- if (arg1 < 1)
- result = 0;
- else
- for (result = 1; arg1 > 0; --arg1)
- result *= arg1;
- return result;
- }
- int32
- int2fac(int16 arg1)
- {
- int16 result;
- if (arg1 < 1)
- result = 0;
- else
- for (result = 1; arg1 > 0; --arg1)
- result *= arg1;
- return result;
- }
- int16
- int2larger(int16 arg1, int16 arg2)
- {
- return (arg1 > arg2) ? arg1 : arg2;
- }
- int16
- int2smaller(int16 arg1, int16 arg2)
- {
- return (arg1 < arg2) ? arg1 : arg2;
- }
- int32
- int4larger(int32 arg1, int32 arg2)
- {
- return (arg1 > arg2) ? arg1 : arg2;
- }
- int32
- int4smaller(int32 arg1, int32 arg2)
- {
- return (arg1 < arg2) ? arg1 : arg2;
- }