Difference between revisions of "ARRAY UPDATE()"
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==SYNOPSIS== | ==SYNOPSIS== | ||
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#include "dbapi.h" | #include "dbapi.h" | ||
Latest revision as of 12:13, 30 March 2009
PURPOSE
Update the value in a Recital array
SYNONYM
api_array_update()
SYNOPSIS
#include "dbapi.h" int ARRAY_UPDATE(arrayname, element, type, width, decimal, string, number, logical, date, datetime, currency) <input parameters> char *arrayname; /* Address of a buffer containing the name of a Recital array */ int element; /* Element number */ char type; /* Type of field */ int width; /* Display width */ int decimal; /* Display # decimals */ char string; /* Address of a buffer containing a character string */ double *number; /* Number */ char logical; /* Logical */ unsigned long date; /* Recital date */ DATETIME datetime; /* Recital datetime */ CURRENCY currency; /* Recital currency */ <output parameters> none
DESCRIPTION
The ARRAY_UPDATE() function will update the specified element in the Recital array. The name and element number are used to specify the array element to update
Recital will only recognize the first ten characters on a array name as being unique. The array names are not case sensitive and must have been previously defined before updating, or the ARRAY_UPDATE() function will return a value of -1.
NOTE: Recital array elements start at 1 and not 0 as in 'C'.
Array elements can be updated with data of a different type to their current value. The variable type parameter specifies both the data type and which input parameter value will be used to update the memory variable.
The width parameter is used to specify length of the array element. A decimal place can be specified for a number, but should be 0 for other data types.
An array element can be defined as any one of the following.
| TYPE | OUTPUT | WIDTH | DESCRIPTION |
|---|---|---|---|
| C | info_character | 1 - 8192 | address of a buffer containing a character string |
| D | info_date | 8 | unsigned long representing a Recital Date |
| L | info_logical | 1 | character of either 'T' for true or 'F' for false |
| N | info_number | 1 - 16 | a value stored in a double |
| T | info_datetime | sizeof(DATETIME) | RCT_DATETIME_DEF structure |
| Y | info_currency | sizeof(CURRENCY) | RCT_CURRENCY_DEF structure |
EXAMPLE
The following example will define a six element array and update each array element with the specified values.
#include "dbapi.h" dbapi_array_update() { int rc; double numeric; char string[8]; char logical; unsigned long date; DATETIME datetime; CURRENCY currency; strcpy (string, "Recital"); date = DATE_CTOD(DATE_DATE()); logical = 'T'; numeric = 23.5; memcpy(&datetime, DATE_STOT(DATE_DATETIME()), sizeof(DATETIME)); memcpy(¤cy, CURR_STOY("364.984"), sizeof(CURRENCY)); COMMAND("release all"); ARRAY_DEFINE("memvar", API_PUBLIC, 6,1); rc = ARRAY_UPDATE("memvar",1, 'C',7,0, string, numeric, logical, date, datetime, currency); rc = ARRAY_UPDATE("memvar",2, 'N',10,2, string, numeric, logical, date, datetime, currency); rc = ARRAY_UPDATE("memvar",3, 'L',1,0, string, numeric, logical, date, datetime, currency); rc = ARRAY_UPDATE("memvar",4, 'D',8,0, string, numeric, logical, date, datetime, currency); rc = ARRAY_UPDATE("memvar",5,'T',sizeof(DATETIME),0, string, numeric, logical, date, datetime, currency); rc = ARRAY_UPDATE("memvar",6, 'Y',sizeof(CURRENCY),4, string, numeric, logical, date, datetime, currency); _retl( (rc ==0) ? 1 : 0 ); }
SEE ALSO
_parinfa(), ALENGTH(), ISARRAY(), ARRAY_ALEN(), ARRAY_DEFINE(), ARRAY_LOOKUP()</pre>
