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79 lines
3.0 KiB
Plaintext
79 lines
3.0 KiB
Plaintext
String Manipulation Functions for C02
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Strings are zero-terminated arrays of type char with a maximum length
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of 128 characters.
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The first character in a string is at position 0, and the last character
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is at position length - 1.
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Since all of the routines stop processing at the 128th character, a 128
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character string does not require a zero terminator.
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Usage: at the beginning of the program use the directives
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#include <string.h02>
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The following functions are defined:
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p = strchr(c, &s); Searches string s for character c.
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Returns position of character in string, or 255
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if character was not found.
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n = strlen(&s); Determines length of string s.
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Returns length of string.
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strset(&s); Sets string s as the source string for subsequent
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strcat(). strcmp(), strcpy(), and strstr() calls.
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Note: Sets variables srclo and srchi as a pointer
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to the string.
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n = strcat(&s); Concatenates destination string s onto the end of
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source string set by prior setstr() call.
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Returns total length of concatenated string.
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Note: srclo and srchi are left pointing to the
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source string.
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b = strcmp(&s); Compares destination string s against source
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string set by prior setstr() call.
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Returns -1 if source < destination, 0 if
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source = destination, and 1 if source > destination.
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Note: srclo and srchi are left pointing to the
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source string.
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n = strcpy(&s); Copies destination string s into source string
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set by prior setstr() call, replacing previous
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contents.
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Returns number of characters copied.
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Note: srclo and srchi are left pointing to the
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source string.
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p = strstr(&s); Searches for destination string s in source string
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set by prior setstr() call.
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Returns position of destination string in source
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string, or 255 if character was not found.
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Note: srclo and srchi are left pointing to the
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address of the position of the destination string
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in the source string.
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Note: This library expects the following Zero Page locations to be defined
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strlo, strhi Destination String Pointer
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srclo, srchi String Pointer (high byte)
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as well as the memory location
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temp0 Temporary storage
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