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3749 GerdtR 1 
;****************************************
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;*  input:  esi = pointer to string     *
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;*  output: ecx = length of the string  *
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;****************************************
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strlen:
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      push	eax esi
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      xor	ecx, ecx
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      @@:
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	lodsb
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	or	al, al
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	jz	@f
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	inc	ecx
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	jmp	@b
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      @@:
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      pop      esi eax
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  ret
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;*************************************************
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;*  input:  esi = pointer to the src string      *
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;*          edi = pointer to the dest string     *
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;*          ecx = number of bytes to copy        *
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;*************************************************
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strncpy:
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      push	eax ecx esi edi
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      @@:
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	lodsb
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	stosb
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	or	al, al
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	jz	@f
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	dec	ecx
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	jz	@f
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	jmp	@b
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      @@:
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      pop	edi esi ecx eax
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  ret
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;*************************************************
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;*  input:  esi = pointer to the src string      *
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;*          edi = pointer to the dest string     *
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;*************************************************
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strcpy:
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     push  esi edi
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     rep   movsb
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     pop   edi esi
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  ret
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47 
;*************************************************
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;*  input:  esi = pointer to the src string      *
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;*          edi = pointer to the dest string     *
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;*************************************************
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strcat:
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     push  esi
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     call  strlen
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     add   esi, ecx
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     call  strcpy
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     pop   esi
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  ret
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59 
;*************************************************
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;*  input:  esi = pointer to the src string      *
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;*          edi = pointer to the dest string     *
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;*          ecx = number of bytes to copy        *
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;*************************************************
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strncat:
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     push  edi
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     push  ecx esi
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     mov   esi, edi
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     call  strlen
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     add   edi, ecx
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     pop   esi ecx
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     call  strncpy
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     pop   edi
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  ret
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;*************************************************
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;*  input:  edi = pointer to the dest string     *
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;*           al = byte to set the string to      *
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;*************************************************
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;strset:
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;     push  edi
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;     rep   stosb
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;     pop   edi
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;  ret
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85 
;*************************************************
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;*  input:  edi = pointer to the dest string     *
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;*           al = byte to set the string to      *
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;*          ecx = number of bytes to set         *
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;*************************************************
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strnset:
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     push    edi ecx
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     repe    stosb
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     pop     ecx edi
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  ret