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73 lines
2.8 KiB
Plaintext
73 lines
2.8 KiB
Plaintext
String Manipulation Module for C02
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These functions are not part of the standard C and C++ string libraries.
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They are included because they are more efficient than equivalent C02 code.
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#include <stddef.h02>
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#include <ctype.h02>
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#include <string.h02>
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The following functions are defined:
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n = strapd(c, s); Appends character c to string s.
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Returns the new length of the string.
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Note: Calls strlen(), then writes c into the end
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position and a 0 byte into the following position.
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n = straps(s); Appends a space to string s.
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Returns the new length of the string.
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Note: Executes strspd with arguments ' ' and s.
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n = strppd(c, s); Prepends character c to string s.
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Returns the new length of the string.
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Note: Calls strlen(), shifts the entire string one
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character to the right and writes c to position 0.
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n = strpps(s); Prepends a space to string s.
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Returns the new length of the string.
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Note: Executes strppd with arguments ' ' and s.
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n = strpad(v,s); Right pads string s with spaces to length v.
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If v is less than the current length of the
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string. the string is not changed.
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Returns the new length of the string.
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Note: Calls strlen(), and if the result is less
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than v, appends the appropriate number of spaces.
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n = strlwr(s); Converts letters in string s to lowercase.
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Returns the length of the string.
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Note: Sets srcptr to &s, then iterates through
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the string, calling tolowr() on each character,
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n = strupr(s); Converts letters in string s to uppercase.
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Returns the length of the string.
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Note: Sets srcptr to &s, then iterates through
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the string, calling touppr() on each character,
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Note: This module expects the following functions to be defined
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setdst(s); Set destination pointer
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setsrc(s); Set source pointer and initialize index
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along with the zero page variable pairs
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srcptr Source String Pointer
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dstptr Destination String Pointer
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