mirror of
https://github.com/RevCurtisP/C02.git
synced 2024-06-01 05:41:34 +00:00
73 lines
2.9 KiB
Plaintext
73 lines
2.9 KiB
Plaintext
String List Manipulation Module for C02
|
|
|
|
|
|
A string list is a contiguous set of mixed length zero-terminated
|
|
strings followed by a zero byte (empty string). For example:
|
|
|
|
char list = {"one","two","three",0};
|
|
|
|
A string list can be any length. but each entry must be no more than
|
|
the maximum string length of 128 characters long.
|
|
|
|
The string list functions all make use of the zero-page integer
|
|
variable lstptr. Multiple lists can be accessed by saving and restoring
|
|
it's value.
|
|
|
|
Usage: at the beginning of the program use the directives
|
|
|
|
#include <stddef.h02>
|
|
#include <string.h02>
|
|
|
|
The following functions are defined:
|
|
|
|
setlst(t); Sets the list pointer to the beginning of the string
|
|
list t.
|
|
|
|
This must be called at least once before calling any
|
|
of the following functions.
|
|
|
|
Note: Stores &t in lstptr.
|
|
|
|
w = strlln(r); Returns the number of entries in string list r as
|
|
an integer.
|
|
|
|
Note: Calls strlen() and addsra() for each entry in
|
|
the list, accumulating the count in temp1 and temp2.
|
|
|
|
n, p = strget(s); Reads the next entry from a string list set by a
|
|
prior setlst() call into string s.
|
|
|
|
Returns length of the entry and the new position
|
|
in the string list. When the end of the list is
|
|
reached, s is set to an empty string and any further
|
|
calls to strget() will also return an empty string.
|
|
|
|
Note: Calls setdst(), getlst(), and strcpy(). If n
|
|
is not not zero, calls addsra() and updates lstptr.
|
|
|
|
n, p = strput(s); Writes string s to a string list set by a prior
|
|
setlst() call and terminates the string list.
|
|
|
|
Returns length of the entry and the new position in
|
|
the string list.
|
|
|
|
Note: Calls setsrc(), getlst(), setdst() and
|
|
strcpy(). If n is not zero, calls addsra() and
|
|
updates lstptr.
|
|
|
|
|
|
Note: This module expects the following functions to be defined
|
|
|
|
addsra(n); Add accumulator to sorce pointer.
|
|
getlst(); Get list pointer
|
|
setdst(s); Set destination pointer
|
|
setlst(); Set list pointrt
|
|
setsrc(s); Set source pointer and initialize index
|
|
strcpy(s); String copy alternate entry point.
|
|
|
|
along with the zero page variable pairs
|
|
|
|
dstptr Destination String Pointer
|
|
lstprt List Pointer
|
|
srcptr Source String Pointer
|