| |
| /* |
| * Name: getInt |
| * Input: FILE ptr |
| * Output: integer value read |
| * Return: GET_INT_SUCCESS, or |
| * GET_INT_GET_STRING_FAILURE |
| * Description: The routine reads a space delimited integer from the |
| * current position of the FILE pointer. The routine uses |
| * getString() to obtain the character string representation |
| * of the integer and then uses the system level strtol() to |
| * find the integer value. Note that the getString() routine |
| * does not allow the read to cross an end-of-line indicator |
| * as opposed to the system routines which do. In the event |
| * of an error, the output value is set to an implausible |
| * amount, MINIMUM_VALUE_OF_INT, to indicate an error occurred |
| * along with an appropriate return code. |
| * Calls: |
| * System: |
| * strlen() |
| * strtol() |
| * Author: M.L.Rivas |
| * |
| * Revision History: |
| * |
| * Date Name Revision |
| * ------- --------------- ------------------------------ |
| * 24May99 Matthew Rivas Created |
| * |
| * Copyright 1999, Atlantic Aerospace Electronics Corp. |
| */ |
| |
| #include <assert.h> /* for assert() */ |
| #include <errno.h> /* for extern errno definition */ |
| #include <stdlib.h> /* for NULL definition */ |
| #include <stdio.h> /* for FILE definition */ |
| #include <string.h> /* for strlen() definition */ |
| #include "dataManagement.h" /* for primitive type definitions */ |
| #include "getInt.h" /* for getInt() return codes */ |
| |
| extern int errno; |
| |
| /* |
| * Function prototype |
| */ |
| extern Char *getString( FILE *file ); |
| |
| Int getInt( FILE *file, /* FILE stream to read */ |
| Int *value ) /* value to output */ |
| { /* begin getInt() */ |
| Char *temp; /* temporary string returned by getString() */ |
| Char *endptr; /* residual from conversion from string to int */ |
| Int returnCode; /* return code for this routine */ |
| |
| assert( file ); |
| assert( value ); |
| |
| /* |
| * Use utility routine getString to read the string representation of the |
| * Int. Check return code of getString for success or errors. On |
| * successful read of string, use system routine strtod to convert string |
| * to integer value. Check for errors returned from system call and range |
| * errors. |
| */ |
| temp = getString( file ); |
| if ( temp != NULL ) { |
| /* |
| * A valid string was read from the input and is reference by temp |
| */ |
| *value = strtol( temp, &endptr, 0 ); |
| if ( *value == 0 && strlen( endptr ) > 0 && errno == ERANGE ) { |
| *value = MINIMUM_VALUE_OF_INT; |
| returnCode = GET_INT_BAD_CONVERSION; |
| } /* end of strtol error check */ |
| else { |
| if ( *value < MINIMUM_VALUE_OF_INT ) { |
| *value = MINIMUM_VALUE_OF_INT; |
| returnCode = GET_INT_RANGE_EXCEEDED; |
| } /* end of value < MINIMUM_VALUE_OF_INT */ |
| else if ( *value > MAXIMUM_VALUE_OF_INT ) { |
| *value = MAXIMUM_VALUE_OF_INT; |
| returnCode = GET_INT_RANGE_EXCEEDED; |
| } /* end of value > MAXIMUM_VALUE_OF_INT */ |
| else { |
| returnCode = GET_INT_SUCCESS; |
| } /* end of else - SUCCESS */ |
| } /* end of else strtol did not error */ |
| } /* end if temp != NULL */ |
| else { |
| *value = MINIMUM_VALUE_OF_INT; |
| returnCode = GET_INT_EOI; |
| } /* end if GET_STRING end-of-input */ |
| |
| return ( returnCode ); |
| } /* end of getInt() */ |
