160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/*++
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Copyright (c) 1993 Microsoft Corporation
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Module Name:
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ldrdbcs.c
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Abstract:
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This module contains the multibyte string functions.
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Author:
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Akihiko Sasaki (V-AkihiS) 23-June-1993
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Revision History:
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--*/
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#ifdef DBCS
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#include "ldrdbcs.h"
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unsigned char * _CRTAPI1
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ldrMultiByteStrchr(
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const unsigned char *string,
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unsigned short c
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)
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{
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const unsigned char ch = c;
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while (*string != ch) {
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if (IsDBCSLeadByte(*string)) {
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string++;
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}
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if (*string == '\0')
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return NULL;
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string++;
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}
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return (unsigned char *)string;
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}
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unsigned char * _CRTAPI1
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ldrMultiByteStrrchr(
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const unsigned char *string,
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unsigned short c
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)
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{
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const unsigned char ch = c;
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const unsigned char *lastoccurence = NULL;
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while (1) {
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if (IsDBCSLeadByte(*string)) {
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string++;
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} else {
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if (*string == ch)
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lastoccurence = string;
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}
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if (*string == '\0')
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return (unsigned char *)lastoccurence;
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string++;
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}
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}
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unsigned char * _CRTAPI1
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ldrMultiByteStrstr(
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const unsigned char *string1,
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const unsigned char *string2
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)
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{
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if (*string2 == '\0')
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return (unsigned char *)string1;
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while((string1 = ldrMultiByteStrchr(string1, *string2)) != NULL) {
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const unsigned char *substring1 = string1;
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const unsigned char *substring2 = string2;
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while (1) {
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if (IsDBCSLeadByte(*substring1)) {
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if (IsDBCSLeadByte(*substring2)) {
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if (*substring1++ == *substring2++) {
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if (*substring2 == '\0')
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if (*substring1 == '\0')
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return (unsigned char *)string1;
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else
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return NULL;
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else if (*substring1++ != *substring2++)
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break;
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} else {
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if (*substring1 == '\0' || *substring2 == '\0')
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return NULL;
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substring1 +=2;
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substring2 +=2;
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}
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} else {
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if (*substring2 == '\0') {
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return (unsigned char *)string1;
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} else {
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substring1++;
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if (*substring1 == '\0')
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return NULL;
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substring1++;
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substring2++;
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}
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}
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} else {
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if (IsDBCSLeadByte(*substring2)) {
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if (*substring1 == '\0') {
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return NULL;
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} else {
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substring2++;
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if (*substring2 == '\0')
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return NULL;
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substring1++;
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substring2++;
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}
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} else {
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if (*substring2 == '\0')
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return (unsigned char *)string1;
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else if (*substring1 == '\0')
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return NULL;
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else if (*substring1++ != *substring2++)
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break;
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}
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}
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}
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string1++;
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}
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return NULL;
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}
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unsigned char * _CRTAPI1
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ldrMultiByteStrpbrk(
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const unsigned char *string1,
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const unsigned char *string2
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)
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{
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const unsigned char *substring1, *substring2;
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substring1 = string1;
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while (*substring1 != '\0') {
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substring2 = string2;
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if (IsDBCSLeadByte(*substring1)) {
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substring1++;
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if (*substring1 == '\0')
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return NULL;
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} else {
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while (*substring2 != '\0') {
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if (*substring1 == *substring2)
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return (unsigned char *)substring1;
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substring2++;
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}
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}
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substring1++;
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}
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return NULL;
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}
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#endif
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