WebSVN – HelenOS – Diff – /tags/0.2.0.1/uspace/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.
 */
 
 /** @addtogroup libc
 * @{
 */
/** @file
 */
 
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <limits.h>
#include <align.h>
 
 
/* Dummy implementation of mem/ functions */
 
void * memset(void *s, int c, size_t n)
{
    char *os = s;
    while (n--)
        *(os++) = c;
    return s;
}
 
struct along {unsigned long n; } __attribute__ ((packed));
 
static void * unaligned_memcpy(void *dst, const void *src, size_t n)
{
    int i, j;
    struct along *adst = dst;
    const struct along *asrc = src;
 
    for (i = 0; i < n/sizeof(unsigned long); i++)
        adst[i].n = asrc[i].n;
       
    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 * memcpy(void *dst, const void *src, size_t n)
{
    int i, j;
 
    if (((long)dst & (sizeof(long)-1)) || ((long)src & (sizeof(long)-1)))
        return unaligned_memcpy(dst, src, n);
 
    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 1965	Rev 1968
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	/** @addtogroup libc	29	/** @addtogroup libc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <string.h>	35	#include <string.h>
36	#include <unistd.h>	36	#include <unistd.h>
37	#include <ctype.h>	37	#include <ctype.h>
38	#include <limits.h>	38	#include <limits.h>
39	#include <align.h>	39	#include <align.h>
40		40
41		41
42	/* Dummy implementation of mem/ functions */	42	/* Dummy implementation of mem/ functions */
43		43
44	void * memset(void *s, int c, size_t n)	44	void * memset(void *s, int c, size_t n)
45	{	45	{
46	char *os = s;	46	char *os = s;
47	while (n--)	47	while (n--)
48	*(os++) = c;	48	*(os++) = c;
49	return s;	49	return s;
50	}	50	}
51		51
52	struct along {unsigned long n; } __attribute__ ((packed));	52	struct along {unsigned long n; } __attribute__ ((packed));
53		53
54	static void * unaligned_memcpy(void dst, const void src, size_t n)	54	static void * unaligned_memcpy(void dst, const void src, size_t n)
55	{	55	{
56	int i, j;	56	int i, j;
57	struct along *adst = dst;	57	struct along *adst = dst;
58	const struct along *asrc = src;	58	const struct along *asrc = src;
59		59
60	for (i = 0; i < n/sizeof(unsigned long); i++)	60	for (i = 0; i < n/sizeof(unsigned long); i++)
61	adst[i].n = asrc[i].n;	61	adst[i].n = asrc[i].n;
62		62
63	for (j = 0; j < n%sizeof(unsigned long); j++)	63	for (j = 0; j < n%sizeof(unsigned long); j++)
64	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];	64	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];
65		65
66	return (char *)src;	66	return (char *)src;
67	}	67	}
68		68
69	void * memcpy(void dst, const void src, size_t n)	69	void * memcpy(void dst, const void src, size_t n)
70	{	70	{
71	int i, j;	71	int i, j;
72		72
73	if (((long)dst & (sizeof(long)-1)) \|\| ((long)src & (sizeof(long)-1)))	73	if (((long)dst & (sizeof(long)-1)) \|\| ((long)src & (sizeof(long)-1)))
74	return unaligned_memcpy(dst, src, n);	74	return unaligned_memcpy(dst, src, n);
75		75
76	for (i = 0; i < n/sizeof(unsigned long); i++)	76	for (i = 0; i < n/sizeof(unsigned long); i++)
77	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];	77	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];
78		78
79	for (j = 0; j < n%sizeof(unsigned long); j++)	79	for (j = 0; j < n%sizeof(unsigned long); j++)
80	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];	80	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];
81		81
82	return (char *)src;	82	return (char *)src;
83	}	83	}
84		84
85	void * memmove(void dst, const void src, size_t n)	85	void * memmove(void dst, const void src, size_t n)
86	{	86	{
87	int i, j;	87	int i, j;
88		88
89	if (src > dst)	89	if (src > dst)
90	return memcpy(dst, src, n);	90	return memcpy(dst, src, n);
91		91
92	for (j = (n%sizeof(unsigned long))-1; j >= 0; j--)	92	for (j = (n%sizeof(unsigned long))-1; j >= 0; j--)
93	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];	93	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];
94		94
95	for (i = n/sizeof(unsigned long)-1; i >=0 ; i--)	95	for (i = n/sizeof(unsigned long)-1; i >=0 ; i--)
96	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];	96	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];
97		97
98	return (char *)src;	98	return (char *)src;
99	}	99	}
100		100
101		101
102	/** Count the number of characters in the string, not including terminating 0.	102	/** Count the number of characters in the string, not including terminating 0.
103	* @param str string	103	* @param str string
104	* @return number of characters in string.	104	* @return number of characters in string.
105	*/	105	*/
106	size_t strlen(const char *str)	106	size_t strlen(const char *str)
107	{	107	{
108	size_t counter = 0;	108	size_t counter = 0;
109		109
110	while (str[counter] != 0) {	110	while (str[counter] != 0) {
111	counter++;	111	counter++;
112	}	112	}
113		113
114	return counter;	114	return counter;
115	}	115	}
116		116
117	int strcmp(const char a,const char b)	117	int strcmp(const char a,const char b)
118	{	118	{
119	int c=0;	119	int c=0;
120		120
121	while(a[c]&&b[c]&&(!(a[c]-b[c]))) c++;	121	while(a[c]&&b[c]&&(!(a[c]-b[c]))) c++;
122		122
123	return a[c]-b[c];	123	return a[c]-b[c];
124		124
125	}	125	}
126		126
127		127
128		128
129	/** Return pointer to the first occurence of character c in string	129	/** Return pointer to the first occurence of character c in string
130	* @param str scanned string	130	* @param str scanned string
131	* @param c searched character (taken as one byte)	131	* @param c searched character (taken as one byte)
132	* @return pointer to the matched character or NULL if it is not found in given string.	132	* @return pointer to the matched character or NULL if it is not found in given string.
133	*/	133	*/
134	char strchr(const char str, int c)	134	char strchr(const char str, int c)
135	{	135	{
136	while (*str != '\0') {	136	while (*str != '\0') {
137	if (*str == (char)c)	137	if (*str == (char)c)
138	return (char *)str;	138	return (char *)str;
139	str++;	139	str++;
140	}	140	}
141		141
142	return NULL;	142	return NULL;
143	}	143	}
144		144
145	/** Return pointer to the last occurence of character c in string	145	/** Return pointer to the last occurence of character c in string
146	* @param str scanned string	146	* @param str scanned string
147	* @param c searched character (taken as one byte)	147	* @param c searched character (taken as one byte)
148	* @return pointer to the matched character or NULL if it is not found in given string.	148	* @return pointer to the matched character or NULL if it is not found in given string.
149	*/	149	*/
150	char strrchr(const char str, int c)	150	char strrchr(const char str, int c)
151	{	151	{
152	char *retval = NULL;	152	char *retval = NULL;
153		153
154	while (*str != '\0') {	154	while (*str != '\0') {
155	if (*str == (char)c)	155	if (*str == (char)c)
156	retval = (char *)str;	156	retval = (char *)str;
157	str++;	157	str++;
158	}	158	}
159		159
160	return (char *)retval;	160	return (char *)retval;
161	}	161	}
162		162
163	/** Convert string to a number.	163	/** Convert string to a number.
164	* Core of strtol and strtoul functions.	164	* Core of strtol and strtoul functions.
165	* @param nptr pointer to string	165	* @param nptr pointer to string
166	* @param endptr if not NULL, function stores here pointer to the first invalid character	166	* @param endptr if not NULL, function stores here pointer to the first invalid character
167	* @param base zero or number between 2 and 36 inclusive	167	* @param base zero or number between 2 and 36 inclusive
168	* @param sgn its set to 1 if minus found	168	* @param sgn its set to 1 if minus found
169	* @return result of conversion.	169	* @return result of conversion.
170	*/	170	*/
171	static unsigned long _strtoul(const char nptr, char endptr, int base, char sgn)	171	static unsigned long _strtoul(const char nptr, char endptr, int base, char sgn)
172	{	172	{
173	unsigned char c;	173	unsigned char c;
174	unsigned long result = 0;	174	unsigned long result = 0;
175	unsigned long a, b;	175	unsigned long a, b;
176	const char *str = nptr;	176	const char *str = nptr;
177	const char *tmpptr;	177	const char *tmpptr;
178		178
179	while (isspace(*str))	179	while (isspace(*str))
180	str++;	180	str++;
181		181
182	if (*str == '-') {	182	if (*str == '-') {
183	*sgn = 1;	183	*sgn = 1;
184	++str;	184	++str;
185	} else if (*str == '+')	185	} else if (*str == '+')
186	++str;	186	++str;
187		187
188	if (base) {	188	if (base) {
189	if ((base == 1) \|\| (base > 36)) {	189	if ((base == 1) \|\| (base > 36)) {
190	/* FIXME: set errno to EINVAL */	190	/* FIXME: set errno to EINVAL */
191	return 0;	191	return 0;
192	}	192	}
193	if ((base == 16) && (*str == '0') && ((str[1] == 'x') \|\| (str[1] == 'X'))) {	193	if ((base == 16) && (*str == '0') && ((str[1] == 'x') \|\| (str[1] == 'X'))) {
194	str += 2;	194	str += 2;
195	}	195	}
196	} else {	196	} else {
197	base = 10;	197	base = 10;
198		198
199	if (*str == '0') {	199	if (*str == '0') {
200	base = 8;	200	base = 8;
201	if ((str[1] == 'X') \|\| (str[1] == 'x')) {	201	if ((str[1] == 'X') \|\| (str[1] == 'x')) {
202	base = 16;	202	base = 16;
203	str += 2;	203	str += 2;
204	}	204	}
205	}	205	}
206	}	206	}
207		207
208	tmpptr = str;	208	tmpptr = str;
209		209
210	while (*str) {	210	while (*str) {
211	c = *str;	211	c = *str;
212	c = ( c >= 'a'? c-'a'+10:(c >= 'A'?c-'A'+10:(c <= '9'?c-'0':0xff)));	212	c = ( c >= 'a'? c-'a'+10:(c >= 'A'?c-'A'+10:(c <= '9'?c-'0':0xff)));
213	if (c > base) {	213	if (c > base) {
214	break;	214	break;
215	}	215	}
216		216
217	a = (result & 0xff) * base + c;	217	a = (result & 0xff) * base + c;
218	b = (result >> 8) * base + (a >> 8);	218	b = (result >> 8) * base + (a >> 8);
219		219
220	if (b > (ULONG_MAX >> 8)) {	220	if (b > (ULONG_MAX >> 8)) {
221	/* overflow */	221	/* overflow */
222	/* FIXME: errno = ERANGE*/	222	/* FIXME: errno = ERANGE*/
223	return ULONG_MAX;	223	return ULONG_MAX;
224	}	224	}
225		225
226	result = (b << 8) + (a & 0xff);	226	result = (b << 8) + (a & 0xff);
227	++str;	227	++str;
228	}	228	}
229		229
230	if (str == tmpptr) {	230	if (str == tmpptr) {
231	/* no number was found => first invalid character is the first character of the string */	231	/* no number was found => first invalid character is the first character of the string */
232	/* FIXME: set errno to EINVAL */	232	/* FIXME: set errno to EINVAL */
233	str = nptr;	233	str = nptr;
234	result = 0;	234	result = 0;
235	}	235	}
236		236
237	if (endptr)	237	if (endptr)
238	endptr = (char )str;	238	endptr = (char )str;
239		239
240	if (nptr == str) {	240	if (nptr == str) {
241	/FIXME: errno = EINVAL/	241	/FIXME: errno = EINVAL/
242	return 0;	242	return 0;
243	}	243	}
244		244
245	return result;	245	return result;
246	}	246	}
247		247
248	/** Convert initial part of string to long int according to given base.	248	/** Convert initial part of string to long int according to given base.
249	* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').	249	* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').
250	* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.	250	* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.
251	* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).	251	* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).
252	* Otherwise the base 0 is taken as decimal.	252	* Otherwise the base 0 is taken as decimal.
253	* @param nptr pointer to string	253	* @param nptr pointer to string
254	* @param endptr if not NULL, function stores here pointer to the first invalid character	254	* @param endptr if not NULL, function stores here pointer to the first invalid character
255	* @param base zero or number between 2 and 36 inclusive	255	* @param base zero or number between 2 and 36 inclusive
256	* @return result of conversion.	256	* @return result of conversion.
257	*/	257	*/
258	long int strtol(const char nptr, char *endptr, int base)	258	long int strtol(const char nptr, char *endptr, int base)
259	{	259	{
260	char sgn = 0;	260	char sgn = 0;
261	unsigned long number = 0;	261	unsigned long number = 0;
262		262
263	number = _strtoul(nptr, endptr, base, &sgn);	263	number = _strtoul(nptr, endptr, base, &sgn);
264		264
265	if (number > LONG_MAX) {	265	if (number > LONG_MAX) {
266	if ((sgn) && (number == (unsigned long)(LONG_MAX) + 1)) {	266	if ((sgn) && (number == (unsigned long)(LONG_MAX) + 1)) {
267	/* FIXME: set 0 to errno */	267	/* FIXME: set 0 to errno */
268	return number;	268	return number;
269	}	269	}
270	/* FIXME: set ERANGE to errno */	270	/* FIXME: set ERANGE to errno */
271	return (sgn?LONG_MIN:LONG_MAX);	271	return (sgn?LONG_MIN:LONG_MAX);
272	}	272	}
273		273
274	return (sgn?-number:number);	274	return (sgn?-number:number);
275	}	275	}
276		276
277		277
278	/** Convert initial part of string to unsigned long according to given base.	278	/** Convert initial part of string to unsigned long according to given base.
279	* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').	279	* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').
280	* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.	280	* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.
281	* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).	281	* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).
282	* Otherwise the base 0 is taken as decimal.	282	* Otherwise the base 0 is taken as decimal.
283	* @param nptr pointer to string	283	* @param nptr pointer to string
284	* @param endptr if not NULL, function stores here pointer to the first invalid character	284	* @param endptr if not NULL, function stores here pointer to the first invalid character
285	* @param base zero or number between 2 and 36 inclusive	285	* @param base zero or number between 2 and 36 inclusive
286	* @return result of conversion.	286	* @return result of conversion.
287	*/	287	*/
288	unsigned long strtoul(const char nptr, char *endptr, int base)	288	unsigned long strtoul(const char nptr, char *endptr, int base)
289	{	289	{
290	char sgn = 0;	290	char sgn = 0;
291	unsigned long number = 0;	291	unsigned long number = 0;
292		292
293	number = _strtoul(nptr, endptr, base, &sgn);	293	number = _strtoul(nptr, endptr, base, &sgn);
294		294
295	return (sgn?-number:number);	295	return (sgn?-number:number);
296	}	296	}
297		297
298	char strcpy(char dest, const char *src)	298	char strcpy(char dest, const char *src)
299	{	299	{
300	while ((dest++) = (src++))	300	while ((dest++) = (src++))
301	;	301	;
302	}	302	}
303		303
304	char strncpy(char dest, const char *src, size_t n)	304	char strncpy(char dest, const char *src, size_t n)
305	{	305	{
306	while (((dest++) = (src++)) && --n)	306	while (((dest++) = (src++)) && --n)
307	;	307	;
308	}	308	}
309		309
310		310
311	/** @}	311	/** @}
312	*/	312	*/
313		313
314		314
315		315

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(root)/tags/0.2.0.1/uspace/libc/generic/string.c – Rev 1965 → 1968