95 lines
2.3 KiB
Plaintext
95 lines
2.3 KiB
Plaintext
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;****************************************
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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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;*************************************************
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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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;*************************************************
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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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;*************************************************
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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
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