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E4EXPR.H
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C/C++ Source or Header
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1993-03-03
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9KB
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290 lines
/* e4expr.h (c)Copyright Sequiter Software Inc., 1990-1993. All rights reserved. */
#define E4MAX_PARMS 3
#define E4MAX_STACK_ENTRIES 20
typedef void S4OPERATOR(void) ;
struct TOTAL4st ;
typedef struct E4INFO_st
{
FIELD4 *field_ptr ;
char *p1 ;
int len ; /* Length */
int num_entries ; /* Number of entries in sub-expression */
int num_parms ;
int result_pos ; /* The position in the result array for result. */
int i1 ; /* Could be constant position. 'i1' and 'result_pos'
and 'function_i' and 'function'
must be at last position due to memcmp() in e4is_tag() */
int function_i ;
S4OPERATOR *function ;
} E4INFO ;
typedef struct
{
void (S4PTR *function_ptr)() ;
char *name ;
short code ;
char name_len ;
char priority ;
char return_type ;
signed char num_parms ; /* -1 means that the number is flexible */
char type[E4MAX_PARMS] ; /* Parameter types */
} E4FUNCTIONS ;
typedef struct
{
char S4PTR *ptr ; /* The original string */
int pos, len ; /* Source expression position and length */
} S4SCAN ;
typedef struct
{
char S4PTR *ptr ;
unsigned int pos, len ;
int do_extend ;
CODE4 S4PTR *code_base ;
} S4STACK ;
typedef struct
{
EXPR4 expr ;
S4STACK constants ;
S4SCAN scan ; /* Character Expression */
S4STACK op ; /* Operation stack */
CODE4 S4PTR *code_base ;
} E4PARSE ;
typedef struct
{
LINK4 link ;
EXPR4 *expr ;
struct TOTAL4st *total ; /* If calculation is for a total. */
char name[20] ;
int cur_result_pos ;
} EXPR4CALC ;
extern char *expr4buf ; /* Working memory */
extern unsigned expr4buf_len ; /* Length, e4execute() assumes length long enough */
extern char **expr4 ; /* Expression Parms; Points to next parm to be placed */
extern EXPR4 *expr4ptr ; /* Points to expression being evaluated */
extern E4INFO *expr4info_ptr ;
extern char *expr4constants ; /* Points to constant info */
extern E4FUNCTIONS v4functions[] ;
/* Types normally used for Function/Operator parameters and returns */
#define r4date 'D'
#define r4date_doub 'd'
#define r4log 'L'
#define r4num 'N'
#define r4num_doub 'n'
#define r4str 'C'
#define r4memo 'M'
/* Codes for Immediate Data in Compile String */
#define E4FIELD_STR 0
#define E4FIELD_STR_CAT 1
#define E4FIELD_LOG 2
#define E4FIELD_DATE_D 3
#define E4FIELD_DATE_S 4
#define E4FIELD_NUM_D 5
#define E4FIELD_NUM_S 6
#define E4FIELD_MEMO 7
#define E4DOUBLE 8
#define E4STRING 9
#define E4LOG_LOW 10
#define E4LOG_HIGH 13
#define E4LAST_FIELD 7
#define E4FIRST_LOG 10 /* Range of Logical Operators */
#define E4LAST_LOG 14
#define E4FIRST_OPERATOR 15 /* Range of Other Operators */
#define E4LAST_OPERATOR 51
#define E4COMPARE_START 26
#define E4COMPARE_END 46
#define E4FIRST_FUNCTION 52 /* Start of the List of Functions */
#define E4OR 15
#define E4AND 16
#define E4CONCATENATE 17
#define E4CONCAT_TRIM 18
#define E4CONCAT_TWO 22
#define E4EQUAL 26
#define E4NOT_EQUAL 30
#define E4GREATER_EQ 35
#define E4LESS_EQ 38
#define E4GREATER 41
#define E4LESS 44
#define E4DEL 52
#define E4STR 53
#define E4SUBSTR 54
#define E4TIME 55
#define E4UPPER 56
#define E4DTOS 57
#define E4DTOC 59
#define E4TRIM 61
#define E4LTRIM 62
#define E4LEFT 63
#define E4IIF 64
#define E4STOD 68
#define E4CTOD 69
#define E4DELETED 77
#define E4RECCOUNT 78
#define E4RECNO 79
#define E4CALC_FUNCTION 81
#define E4TOTAL 82
#define E4DESCEND_STR 84
#define E4DONE -2
#define E4NO_FUNCTION -3
#define E4COMMA -4
#define E4L_BRACKET -5
#define E4ANOTHER_PARM -6
/* Interface Functions */
#ifdef __cplusplus
extern "C" {
#endif
double S4FUNCTION expr4double( EXPR4 S4PTR * ) ;
int S4FUNCTION expr4double2( EXPR4 S4PTR *, double * ) ;
void S4FUNCTION expr4free( EXPR4 S4PTR * ) ;
int S4FUNCTION expr4len( EXPR4 S4PTR * ) ;
int S4FUNCTION expr4key( EXPR4 S4PTR *, char S4PTR * S4PTR * ) ;
int S4FUNCTION expr4key_convert( EXPR4 S4PTR *, char S4PTR * S4PTR *, int, int ) ;
int S4FUNCTION expr4key_len( EXPR4 S4PTR * ) ;
EXPR4 S4PTR *S4FUNCTION expr4parse( DATA4 S4PTR *, char S4PTR * ) ;
char S4PTR *S4FUNCTION expr4source( EXPR4 S4PTR * ) ;
int S4FUNCTION expr4type( EXPR4 S4PTR * ) ;
int S4FUNCTION expr4true( EXPR4 S4PTR * ) ;
long S4FUNCTION e4long( EXPR4 S4PTR * ) ;
int S4FUNCTION e4to_key( EXPR4 S4PTR *, char S4PTR * S4PTR * ) ;
int S4FUNCTION expr4vary( EXPR4 S4PTR *, char S4PTR * S4PTR * ) ;
#ifdef __cplusplus
}
#endif
/* Parsing Functions */
E4INFO *e4function_add( EXPR4 *, int ) ;
int e4add_constant( E4PARSE *, int, void *, unsigned ) ;
int e4get_operator( E4PARSE S4PTR *, int S4PTR * ) ;
int S4FUNCTION e4lookup( char S4PTR *,int,int,int ) ;
int expr4parse_expr( E4PARSE S4PTR * ) ;
int expr4parse_function( E4PARSE S4PTR *, char S4PTR *,int ) ;
int expr4parse_value( E4PARSE S4PTR * ) ;
int expr4true_check( E4PARSE S4PTR * ) ;
char s4scan_char( S4SCAN S4PTR * ) ;
void s4scan_init( S4SCAN S4PTR *, char S4PTR * ) ;
char s4scan_pop( S4SCAN S4PTR *) ; /* Returns current char and goes to the next */
int s4scan_search( S4SCAN S4PTR *, char ) ; /* Returns # of characters scanned */
int s4scan_range( S4SCAN S4PTR *, int, int ) ;
int s4stack_cur( S4STACK S4PTR * ) ;
int s4stack_pop( S4STACK S4PTR * ) ;
int s4stack_push_int( S4STACK S4PTR *, int ) ;
int s4stack_push_str( S4STACK S4PTR *, void S4PTR *, int ) ;
/* Execute Functions */
void e4add( void ) ;
void e4add_date( void ) ;
void e4and( void ) ;
void e4calc_function( void ) ;
void e4calc_total( void ) ;
void e4concat_special( char ) ;
void e4concat_trim( void ) ;
void e4concat_two( void ) ;
void e4contain( void ) ;
void e4copy_constant( void ) ;
void e4field_copy( void ) ;
void e4copy_parm( void ) ;
void e4ctod( void ) ;
void e4date( void ) ;
void e4day( void ) ;
void e4day_doub( void ) ;
void e4del( void ) ;
void e4deleted( void ) ;
void e4divide( void ) ;
void e4dtoc( void ) ;
void e4dtoc_doub( void ) ;
void e4dtos_doub( void ) ;
void e4equal( void ) ;
void e4false( void ) ;
void e4field_date_d( void ) ;
void e4field_log( void ) ;
void e4field_memo( void ) ;
void e4field_num_d( void ) ;
void e4greater( void ) ;
void e4greater_doub( void ) ;
void e4greater_eq( void ) ;
void e4greater_eq_doub( void ) ;
void e4iif( void ) ;
void e4less( void ) ;
void e4less_doub( void ) ;
void e4less_eq( void ) ;
void e4less_eq_doub( void ) ;
void e4ltrim( void ) ;
void e4month( void ) ;
void e4month_doub( void ) ;
void e4multiply( void ) ;
void e4new_function( void ) ;
void e4nop( void ) ;
void e4not( void ) ;
void e4not_equal( void ) ;
void e4or( void ) ;
void e4field_add( void ) ;
void e4parm_remove( void ) ;
void e4power( void ) ;
void e4reccount( void ) ;
void e4recno( void ) ;
void e4stod( void ) ;
void e4str( void ) ;
void e4sub( void ) ;
void e4sub_date( void ) ;
void e4substr( void ) ;
void e4time( void ) ;
void e4trim( void ) ;
void expr4true_function( void ) ;
void e4upper( void ) ;
void e4val( void ) ;
void e4year( void ) ;
void e4year_doub( void ) ;
void e4pageno( void ) ;
#ifdef S4CLIPPER
void e4descend_str( void ) ;
void e4descend_num_doub( void ) ;
void e4descend_num_str( void ) ;
void e4descend_date_doub( void ) ;
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Relate Module and Report Writer Functions */
int S4FUNCTION expr4compare_flip( int ) ;
int S4FUNCTION expr4execute( EXPR4 *, int, void ** ) ;
void S4FUNCTION expr4functions(E4FUNCTIONS **) ;
EXPR4 S4PTR *S4FUNCTION expr4calc_parse( DATA4 S4PTR *, char S4PTR * ) ;
void S4FUNCTION expr4calc_delete( EXPR4CALC * ) ;
void S4FUNCTION expr4calc_reset( CODE4 * ) ;
void S4FUNCTION expr4calc_massage( EXPR4CALC * );
EXPR4CALC *S4FUNCTION expr4calc_create( CODE4 *, EXPR4 *, char * ) ;
EXPR4CALC *S4FUNCTION expr4calc_lookup( CODE4 *, char *, unsigned ) ;
int S4FUNCTION expr4calc_name_change( EXPR4 **, char *, char * ) ;
void S4FUNCTION expr4calc_result_pos( EXPR4CALC *, int ) ;
#ifdef __cplusplus
}
#endif