HP C Programmer's Guide (92434-90009)

44 Chapter3

Calling Other Languages

Comparing HP C and HP Pascal

Table on page 44 summarizes the differences in storage allocation between HP C and HP

Pascal. The footnote numbers refer to notes located in a section immediately following the

table.

Table 3-1. HP C versus HP Pascal Storage Allocation

HP C Type HP C Description Correspondin

g HP Pascal

Type

HP Pascal Description

char, signed

char

1 byte, byte aligned 1 byte, byte aligned; Subrange:

-128 .. 127

unsigned char 1 byte, byte aligned char 1 byte, byte aligned; Subrange: 0..

255

short 2 bytes, 2-byte aligned shortint Subrange: -32768..32767

unsigned short 2 bytes, 2-byte aligned Subrange: 0 .. 65535

int 4 bytes, 4-byte aligned integer 4 bytes, 4-byte aligned; Subrange:

-2147483648 .. 2147483647

unsigned int 4 bytes, 4-byte aligned 4 bytes, 4-byte aligned; Subrange:

0 .. 4294967295

long 4 bytes, 4-byte aligned integer Subrange: -2147483648 ..

2147483647

unsigned long 4 bytes, 4-byte aligned 4 bytes, 4-byte aligned; Subrange:

0 .. 4294967295

(See Note 1) longint 8 bytes, 4-byte aligned

float 4 bytes, 4-byte aligned real 4 bytes, 4-byte aligned

double 8 bytes, 8-byte aligned longreal 8 bytes, 8-byte aligned

long double 16 bytes, 16-byte

aligned

enum 4 bytes, 4-byte aligned enumeration

or integer

(See Note 2)

1 byte if fewer than 257 elements;

2 bytes if between 257 and 65536;

otherwise, 4 bytes. 1, 2, or 4-byte

aligned.

char enum 1 byte, 1-byte aligned 1 byte, 1-byte aligned, subrange:

-128..127

short enum 2 bytes, 2-byte aligned short int subrange: -32768..32767

int enum 4 bytes, 4-byte aligned integer 4 bytes, 4-byte aligned, subrange:

-2,147,483,648..2,147,483,647