WebSVN – HelenOS-historic – Diff – /uspace/trunk/libc/generic/string.c


/*
 * Copyright (C) 2005 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <limits.h>
 
 
/* Dummy implementation of mem/ functions */
 
void * memset(void *s, int c, size_t n)
{
    char *os = s;
    while (n--)
        *(os++) = c;
    return s;
}
 
void * memcpy(void *dst, const void *src, size_t n)
{
    int i, j;
 
    for (i = 0; i < n/sizeof(unsigned long); i++)
        ((unsigned long *) dst)[i] = ((unsigned long *) src)[i];
       
    for (j = 0; j < n%sizeof(unsigned long); j++)
        ((unsigned char *)(((unsigned long *) dst) + i))[j] = ((unsigned char *)(((unsigned long *) src) + i))[j];
       
    return (char *)src;
}
 
void * memmove(void *dst, const void *src, size_t n)
{
    int i, j;
   
    if (src > dst)
        return memcpy(dst, src, n);
 
    for (j = (n%sizeof(unsigned long))-1; j >= 0; j--)
        ((unsigned char *)(((unsigned long *) dst) + i))[j] = ((unsigned char *)(((unsigned long *) src) + i))[j];
 
    for (i = n/sizeof(unsigned long)-1; i >=0 ; i--)
        ((unsigned long *) dst)[i] = ((unsigned long *) src)[i];
       
    return (char *)src;
}
 
 
/** Count the number of characters in the string, not including terminating 0.
 * @param str string
 * @return number of characters in string.
 */
size_t strlen(const char *str)
{
    size_t counter = 0;
 
    while (str[counter] != 0) {
        counter++;
    }
 
    return counter;
}
 
int strcmp(const char *a,const char *b)
{
    int c=0;
   
    while(a[c]&&b[c]&&(!(a[c]-b[c]))) c++;
   
    return a[c]-b[c];
   
}
 
 
 
/** Return pointer to the first occurence of character c in string
 * @param str scanned string
 * @param c searched character (taken as one byte)
 * @return pointer to the matched character or NULL if it is not found in given string.
 */
char *strchr(const char *str, int c)
{
    while (*str != '\0') {
        if (*str == (char)c)
            return (char *)str;
        str++;
    }
 
    return NULL;
}
 
/** Return pointer to the last occurence of character c in string
 * @param str scanned string
 * @param c searched character (taken as one byte)
 * @return pointer to the matched character or NULL if it is not found in given string.
 */
char *strrchr(const char *str, int c)
{
    char *retval = NULL;
 
    while (*str != '\0') {
        if (*str == (char)c)
            retval = (char *)str;
        str++;
    }
 
    return (char *)retval;
}
 
/** Convert string to a number.
 * Core of strtol and strtoul functions.
 * @param nptr pointer to string
 * @param endptr if not NULL, function stores here pointer to the first invalid character
 * @param base zero or number between 2 and 36 inclusive
 * @param sgn its set to 1 if minus found
 * @return result of conversion.
 */
static unsigned long _strtoul(const char *nptr, char **endptr, int base, char *sgn)
{
    unsigned char c;
    unsigned long result = 0;
    unsigned long a, b;
    const char *str = nptr;
    const char *tmpptr;
   
    while (isspace(*str))
        str++;
   
    if (*str == '-') {
        *sgn = 1;
        ++str;
    } else if (*str == '+')
        ++str;
   
    if (base) {
        if ((base == 1) || (base > 36)) {
            /* FIXME: set errno to EINVAL */
            return 0;
        }
        if ((base == 16) && (*str == '0') && ((str[1] == 'x') || (str[1] == 'X'))) {
            str += 2;
        }
    } else {
        base = 10;
       
        if (*str == '0') {
            base = 8;
            if ((str[1] == 'X') || (str[1] == 'x'))  {
                base = 16;
                str += 2;
            }
        }
    }
   
    tmpptr = str;
 
    while (*str) {
        c = *str;
        c = ( c >= 'a'? c-'a'+10:(c >= 'A'?c-'A'+10:(c <= '9'?c-'0':0xff)));
        if (c > base) {
            break;
        }
       
        a = (result & 0xff) * base + c;
        b = (result >> 8) * base + (a >> 8);
       
        if (b > (ULONG_MAX >> 8)) {
            /* overflow */
            /* FIXME: errno = ERANGE*/
            return ULONG_MAX;
        }
   
        result = (b << 8) + (a & 0xff);
        ++str;
    }
   
    if (str == tmpptr) {
        /* no number was found => first invalid character is the first character of the string */
        /* FIXME: set errno to EINVAL */
        str = nptr;
        result = 0;
    }
   
    if (endptr)
        *endptr = (char *)str;
 
    if (nptr == str) {
        /*FIXME: errno = EINVAL*/
        return 0;
    }
 
    return result;
}
 
/** Convert initial part of string to long int according to given base.
 * The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').
 * If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.
 * If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).
 * Otherwise the base 0 is taken as decimal.
 * @param nptr pointer to string
 * @param endptr if not NULL, function stores here pointer to the first invalid character
 * @param base zero or number between 2 and 36 inclusive
 * @return result of conversion.
 */
long int strtol(const char *nptr, char **endptr, int base)
{
    char sgn = 0;
    unsigned long number = 0;
   
    number = _strtoul(nptr, endptr, base, &sgn);
 
    if (number > LONG_MAX) {
        if ((sgn) && (number == (unsigned long)(LONG_MAX) + 1)) {
            /* FIXME: set 0 to errno */
            return number;     
        }
        /* FIXME: set ERANGE to errno */
        return (sgn?LONG_MIN:LONG_MAX);
    }
   
    return (sgn?-number:number);
}
 
 
/** Convert initial part of string to unsigned long according to given base.
 * The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').
 * If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.
 * If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).
 * Otherwise the base 0 is taken as decimal.
 * @param nptr pointer to string
 * @param endptr if not NULL, function stores here pointer to the first invalid character
 * @param base zero or number between 2 and 36 inclusive
 * @return result of conversion.
 */
unsigned long strtoul(const char *nptr, char **endptr, int base)
{
    char sgn = 0;
    unsigned long number = 0;
   
    number = _strtoul(nptr, endptr, base, &sgn);
 
    return (sgn?-number:number);
}
 
char *strcpy(char *dest, const char *src)
{
    while (*(dest++) = *(src++))
        ;
}
 
char *strncpy(char *dest, const char *src, size_t n)
{
    while (*(dest++) = *(src++) && --n)
        ;
}
 

Rev 1472	Rev 1485
1	/*	1	/*
2	* Copyright (C) 2005 Martin Decky	2	* Copyright (C) 2005 Martin Decky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <string.h>	29	#include <string.h>
30	#include <unistd.h>	30	#include <unistd.h>
31	#include <ctype.h>	31	#include <ctype.h>
32	#include <limits.h>	32	#include <limits.h>
33		33
34		34
35	/* Dummy implementation of mem/ functions */	35	/* Dummy implementation of mem/ functions */
36		36
37	void * memset(void *s, int c, size_t n)	37	void * memset(void *s, int c, size_t n)
38	{	38	{
39	char *os = s;	39	char *os = s;
40	while (n--)	40	while (n--)
41	*(os++) = c;	41	*(os++) = c;
42	return s;	42	return s;
43	}	43	}
44		44
45	void * memcpy(void dest, void src, size_t n)	45	void * memcpy(void dst, const void src, size_t n)
46	{	46	{
47	char *os = src;	47	int i, j;
-		48
48	char *odst = dest;	49	for (i = 0; i < n/sizeof(unsigned long); i++)
-		50	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];
49	while (n--)	51
50	(odst++) = (os++);	52	for (j = 0; j < n%sizeof(unsigned long); j++)
-		53	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];
-		54
51	return dest;	55	return (char *)src;
52	}	56	}
53		57
-		58	void * memmove(void dst, const void src, size_t n)
-		59	{
-		60	int i, j;
-		61
-		62	if (src > dst)
-		63	return memcpy(dst, src, n);
-		64
-		65	for (j = (n%sizeof(unsigned long))-1; j >= 0; j--)
-		66	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];
-		67
-		68	for (i = n/sizeof(unsigned long)-1; i >=0 ; i--)
-		69	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];
-		70
-		71	return (char *)src;
-		72	}
-		73
-		74
54	/** Count the number of characters in the string, not including terminating 0.	75	/** Count the number of characters in the string, not including terminating 0.
55	* @param str string	76	* @param str string
56	* @return number of characters in string.	77	* @return number of characters in string.
57	*/	78	*/
58	size_t strlen(const char *str)	79	size_t strlen(const char *str)
59	{	80	{
60	size_t counter = 0;	81	size_t counter = 0;
61		82
62	while (str[counter] != 0) {	83	while (str[counter] != 0) {
63	counter++;	84	counter++;
64	}	85	}
65		86
66	return counter;	87	return counter;
67	}	88	}
68		89
69	int strcmp(const char a,const char b)	90	int strcmp(const char a,const char b)
70	{	91	{
71	int c=0;	92	int c=0;
72		93
73	while(a[c]&&b[c]&&(!(a[c]-b[c]))) c++;	94	while(a[c]&&b[c]&&(!(a[c]-b[c]))) c++;
74		95
75	return a[c]-b[c];	96	return a[c]-b[c];
76		97
77	}	98	}
78		99
79		100
80		101
81	/** Return pointer to the first occurence of character c in string	102	/** Return pointer to the first occurence of character c in string
82	* @param str scanned string	103	* @param str scanned string
83	* @param c searched character (taken as one byte)	104	* @param c searched character (taken as one byte)
84	* @return pointer to the matched character or NULL if it is not found in given string.	105	* @return pointer to the matched character or NULL if it is not found in given string.
85	*/	106	*/
86	char strchr(const char str, int c)	107	char strchr(const char str, int c)
87	{	108	{
88	while (*str != '\0') {	109	while (*str != '\0') {
89	if (*str == (char)c)	110	if (*str == (char)c)
90	return (char *)str;	111	return (char *)str;
91	str++;	112	str++;
92	}	113	}
93		114
94	return NULL;	115	return NULL;
95	}	116	}
96		117
97	/** Return pointer to the last occurence of character c in string	118	/** Return pointer to the last occurence of character c in string
98	* @param str scanned string	119	* @param str scanned string
99	* @param c searched character (taken as one byte)	120	* @param c searched character (taken as one byte)
100	* @return pointer to the matched character or NULL if it is not found in given string.	121	* @return pointer to the matched character or NULL if it is not found in given string.
101	*/	122	*/
102	char strrchr(const char str, int c)	123	char strrchr(const char str, int c)
103	{	124	{
104	char *retval = NULL;	125	char *retval = NULL;
105		126
106	while (*str != '\0') {	127	while (*str != '\0') {
107	if (*str == (char)c)	128	if (*str == (char)c)
108	retval = (char *)str;	129	retval = (char *)str;
109	str++;	130	str++;
110	}	131	}
111		132
112	return (char *)retval;	133	return (char *)retval;
113	}	134	}
114		135
115	/** Convert string to a number.	136	/** Convert string to a number.
116	* Core of strtol and strtoul functions.	137	* Core of strtol and strtoul functions.
117	* @param nptr pointer to string	138	* @param nptr pointer to string
118	* @param endptr if not NULL, function stores here pointer to the first invalid character	139	* @param endptr if not NULL, function stores here pointer to the first invalid character
119	* @param base zero or number between 2 and 36 inclusive	140	* @param base zero or number between 2 and 36 inclusive
120	* @param sgn its set to 1 if minus found	141	* @param sgn its set to 1 if minus found
121	* @return result of conversion.	142	* @return result of conversion.
122	*/	143	*/
123	static unsigned long _strtoul(const char nptr, char endptr, int base, char sgn)	144	static unsigned long _strtoul(const char nptr, char endptr, int base, char sgn)
124	{	145	{
125	unsigned char c;	146	unsigned char c;
126	unsigned long result = 0;	147	unsigned long result = 0;
127	unsigned long a, b;	148	unsigned long a, b;
128	const char *str = nptr;	149	const char *str = nptr;
129	const char *tmpptr;	150	const char *tmpptr;
130		151
131	while (isspace(*str))	152	while (isspace(*str))
132	str++;	153	str++;
133		154
134	if (*str == '-') {	155	if (*str == '-') {
135	*sgn = 1;	156	*sgn = 1;
136	++str;	157	++str;
137	} else if (*str == '+')	158	} else if (*str == '+')
138	++str;	159	++str;
139		160
140	if (base) {	161	if (base) {
141	if ((base == 1) \|\| (base > 36)) {	162	if ((base == 1) \|\| (base > 36)) {
142	/* FIXME: set errno to EINVAL */	163	/* FIXME: set errno to EINVAL */
143	return 0;	164	return 0;
144	}	165	}
145	if ((base == 16) && (*str == '0') && ((str[1] == 'x') \|\| (str[1] == 'X'))) {	166	if ((base == 16) && (*str == '0') && ((str[1] == 'x') \|\| (str[1] == 'X'))) {
146	str += 2;	167	str += 2;
147	}	168	}
148	} else {	169	} else {
149	base = 10;	170	base = 10;
150		171
151	if (*str == '0') {	172	if (*str == '0') {
152	base = 8;	173	base = 8;
153	if ((str[1] == 'X') \|\| (str[1] == 'x')) {	174	if ((str[1] == 'X') \|\| (str[1] == 'x')) {
154	base = 16;	175	base = 16;
155	str += 2;	176	str += 2;
156	}	177	}
157	}	178	}
158	}	179	}
159		180
160	tmpptr = str;	181	tmpptr = str;
161		182
162	while (*str) {	183	while (*str) {
163	c = *str;	184	c = *str;
164	c = ( c >= 'a'? c-'a'+10:(c >= 'A'?c-'A'+10:(c <= '9'?c-'0':0xff)));	185	c = ( c >= 'a'? c-'a'+10:(c >= 'A'?c-'A'+10:(c <= '9'?c-'0':0xff)));
165	if (c > base) {	186	if (c > base) {
166	break;	187	break;
167	}	188	}
168		189
169	a = (result & 0xff) * base + c;	190	a = (result & 0xff) * base + c;
170	b = (result >> 8) * base + (a >> 8);	191	b = (result >> 8) * base + (a >> 8);
171		192
172	if (b > (ULONG_MAX >> 8)) {	193	if (b > (ULONG_MAX >> 8)) {
173	/* overflow */	194	/* overflow */
174	/* FIXME: errno = ERANGE*/	195	/* FIXME: errno = ERANGE*/
175	return ULONG_MAX;	196	return ULONG_MAX;
176	}	197	}
177		198
178	result = (b << 8) + (a & 0xff);	199	result = (b << 8) + (a & 0xff);
179	++str;	200	++str;
180	}	201	}
181		202
182	if (str == tmpptr) {	203	if (str == tmpptr) {
183	/* no number was found => first invalid character is the first character of the string */	204	/* no number was found => first invalid character is the first character of the string */
184	/* FIXME: set errno to EINVAL */	205	/* FIXME: set errno to EINVAL */
185	str = nptr;	206	str = nptr;
186	result = 0;	207	result = 0;
187	}	208	}
188		209
189	if (endptr)	210	if (endptr)
190	endptr = (char )str;	211	endptr = (char )str;
191		212
192	if (nptr == str) {	213	if (nptr == str) {
193	/FIXME: errno = EINVAL/	214	/FIXME: errno = EINVAL/
194	return 0;	215	return 0;
195	}	216	}
196		217
197	return result;	218	return result;
198	}	219	}
199		220
200	/** Convert initial part of string to long int according to given base.	221	/** Convert initial part of string to long int according to given base.
201	* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').	222	* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').
202	* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.	223	* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.
203	* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).	224	* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).
204	* Otherwise the base 0 is taken as decimal.	225	* Otherwise the base 0 is taken as decimal.
205	* @param nptr pointer to string	226	* @param nptr pointer to string
206	* @param endptr if not NULL, function stores here pointer to the first invalid character	227	* @param endptr if not NULL, function stores here pointer to the first invalid character
207	* @param base zero or number between 2 and 36 inclusive	228	* @param base zero or number between 2 and 36 inclusive
208	* @return result of conversion.	229	* @return result of conversion.
209	*/	230	*/
210	long int strtol(const char nptr, char *endptr, int base)	231	long int strtol(const char nptr, char *endptr, int base)
211	{	232	{
212	char sgn = 0;	233	char sgn = 0;
213	unsigned long number = 0;	234	unsigned long number = 0;
214		235
215	number = _strtoul(nptr, endptr, base, &sgn);	236	number = _strtoul(nptr, endptr, base, &sgn);
216		237
217	if (number > LONG_MAX) {	238	if (number > LONG_MAX) {
218	if ((sgn) && (number == (unsigned long)(LONG_MAX) + 1)) {	239	if ((sgn) && (number == (unsigned long)(LONG_MAX) + 1)) {
219	/* FIXME: set 0 to errno */	240	/* FIXME: set 0 to errno */
220	return number;	241	return number;
221	}	242	}
222	/* FIXME: set ERANGE to errno */	243	/* FIXME: set ERANGE to errno */
223	return (sgn?LONG_MIN:LONG_MAX);	244	return (sgn?LONG_MIN:LONG_MAX);
224	}	245	}
225		246
226	return (sgn?-number:number);	247	return (sgn?-number:number);
227	}	248	}
228		249
229		250
230	/** Convert initial part of string to unsigned long according to given base.	251	/** Convert initial part of string to unsigned long according to given base.
231	* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').	252	* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').
232	* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.	253	* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.
233	* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).	254	* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).
234	* Otherwise the base 0 is taken as decimal.	255	* Otherwise the base 0 is taken as decimal.
235	* @param nptr pointer to string	256	* @param nptr pointer to string
236	* @param endptr if not NULL, function stores here pointer to the first invalid character	257	* @param endptr if not NULL, function stores here pointer to the first invalid character
237	* @param base zero or number between 2 and 36 inclusive	258	* @param base zero or number between 2 and 36 inclusive
238	* @return result of conversion.	259	* @return result of conversion.
239	*/	260	*/
240	unsigned long strtoul(const char nptr, char *endptr, int base)	261	unsigned long strtoul(const char nptr, char *endptr, int base)
241	{	262	{
242	char sgn = 0;	263	char sgn = 0;
243	unsigned long number = 0;	264	unsigned long number = 0;
244		265
245	number = _strtoul(nptr, endptr, base, &sgn);	266	number = _strtoul(nptr, endptr, base, &sgn);
246		267
247	return (sgn?-number:number);	268	return (sgn?-number:number);
248	}	269	}
249		270
250	char strcpy(char dest, const char *src)	271	char strcpy(char dest, const char *src)
251	{	272	{
252	while ((dest++) = (src++))	273	while ((dest++) = (src++))
253	;	274	;
254	}	275	}
255		276
256	char strncpy(char dest, const char *src, size_t n)	277	char strncpy(char dest, const char *src, size_t n)
257	{	278	{
258	while ((dest++) = (src++) && --n)	279	while ((dest++) = (src++) && --n)
259	;	280	;
260	}	281	}
261		282

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(root)/uspace/trunk/libc/generic/string.c @ 1472 – Rev 1472 → 1485