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.
 */
 
/** @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))[j] = ((unsigned char *) ((unsigned long *) src))[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)
{
    char *orig = dest;
   
    while ((*(dest++) = *(src++)));
    return orig;
}
 
char *strncpy(char *dest, const char *src, size_t n)
{
    char *orig = dest;
   
    while ((*(dest++) = *(src++)) && --n);
    return orig;
}
 
 
/** @}
 */
 
 
 

Rev 1653	Rev 1719
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
47	while (n--)	48	while (n--)
48	*(os++) = c;	49	*(os++) = c;
-		50
49	return s;	51	return s;
50	}	52	}
51		53
-		54	struct along {
-		55	unsigned long n;
52	struct along {unsigned long n; } __attribute__ ((packed));	56	} __attribute__ ((packed));
53		57
54	static void * unaligned_memcpy(void dst, const void src, size_t n)	58	static void unaligned_memcpy(void dst, const void *src, size_t n)
55	{	59	{
56	int i, j;	60	int i, j;
57	struct along *adst = dst;	61	struct along *adst = dst;
58	const struct along *asrc = src;	62	const struct along *asrc = src;
59		63
60	for (i = 0; i < n/sizeof(unsigned long); i++)	64	for (i = 0; i < n / sizeof(unsigned long); i++)
61	adst[i].n = asrc[i].n;	65	adst[i].n = asrc[i].n;
62		66
63	for (j = 0; j < n%sizeof(unsigned long); j++)	67	for (j = 0; j < n % sizeof(unsigned long); j++)
64	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];	68	((unsigned char ) (((unsigned long ) dst) + i))[j] = ((unsigned char ) (((unsigned long ) src) + i))[j];
65		69
66	return (char *)src;	70	return (char *) src;
67	}	71	}
68		72
69	void * memcpy(void dst, const void src, size_t n)	73	void memcpy(void dst, const void *src, size_t n)
70	{	74	{
71	int i, j;	75	int i, j;
72		76
73	if (((long)dst & (sizeof(long)-1)) \|\| ((long)src & (sizeof(long)-1)))	77	if (((long) dst & (sizeof(long) - 1)) \|\| ((long) src & (sizeof(long) - 1)))
74	return unaligned_memcpy(dst, src, n);	78	return unaligned_memcpy(dst, src, n);
75		79
76	for (i = 0; i < n/sizeof(unsigned long); i++)	80	for (i = 0; i < n / sizeof(unsigned long); i++)
77	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];	81	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];
78		82
79	for (j = 0; j < n%sizeof(unsigned long); j++)	83	for (j = 0; j < n % sizeof(unsigned long); j++)
80	((unsigned char )(((unsigned long ) dst) + i))[j] = ((unsigned char )(((unsigned long ) src) + i))[j];	84	((unsigned char ) (((unsigned long ) dst) + i))[j] = ((unsigned char ) (((unsigned long ) src) + i))[j];
81		85
82	return (char *)src;	86	return (char *) src;
83	}	87	}
84		88
85	void * memmove(void dst, const void src, size_t n)	89	void memmove(void dst, const void *src, size_t n)
86	{	90	{
87	int i, j;	91	int i, j;
88		92
89	if (src > dst)	93	if (src > dst)
90	return memcpy(dst, src, n);	94	return memcpy(dst, src, n);
91		95
92	for (j = (n%sizeof(unsigned long))-1; j >= 0; j--)	96	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];	97	((unsigned char ) ((unsigned long ) dst))[j] = ((unsigned char ) ((unsigned long ) src))[j];
94		98
95	for (i = n/sizeof(unsigned long)-1; i >=0 ; i--)	99	for (i = n / sizeof(unsigned long) - 1; i >=0 ; i--)
96	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];	100	((unsigned long ) dst)[i] = ((unsigned long ) src)[i];
97		101
98	return (char *)src;	102	return (char *) src;
99	}	103	}
100		104
101		105
102	/** Count the number of characters in the string, not including terminating 0.	106	/** Count the number of characters in the string, not including terminating 0.
103	* @param str string	107	* @param str string
104	* @return number of characters in string.	108	* @return number of characters in string.
105	*/	109	*/
106	size_t strlen(const char *str)	110	size_t strlen(const char *str)
107	{	111	{
108	size_t counter = 0;	112	size_t counter = 0;
109		113
110	while (str[counter] != 0) {	114	while (str[counter] != 0)
111	counter++;	115	counter++;
112	}	-
113		116
114	return counter;	117	return counter;
115	}	118	}
116		119
117	int strcmp(const char a,const char b)	120	int strcmp(const char a, const char b)
118	{	121	{
119	int c=0;	122	int c = 0;
120		123
121	while(a[c]&&b[c]&&(!(a[c]-b[c]))) c++;	124	while (a[c] && b[c] && (!(a[c] - b[c])))
-		125	c++;
122		126
123	return a[c]-b[c];	127	return (a[c] - b[c]);
124		128
125	}	129	}
126		130
127		131
128		-
129	/** Return pointer to the first occurence of character c in string	132	/** Return pointer to the first occurence of character c in string
130	* @param str scanned string	133	* @param str scanned string
131	* @param c searched character (taken as one byte)	134	* @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.	135	* @return pointer to the matched character or NULL if it is not found in given string.
133	*/	136	*/
134	char strchr(const char str, int c)	137	char strchr(const char str, int c)
135	{	138	{
136	while (*str != '\0') {	139	while (*str != '\0') {
137	if (*str == (char)c)	140	if (*str == (char) c)
138	return (char *)str;	141	return (char *) str;
139	str++;	142	str++;
140	}	143	}
141		144
142	return NULL;	145	return NULL;
143	}	146	}
144		147
145	/** Return pointer to the last occurence of character c in string	148	/** Return pointer to the last occurence of character c in string
146	* @param str scanned string	149	* @param str scanned string
147	* @param c searched character (taken as one byte)	150	* @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.	151	* @return pointer to the matched character or NULL if it is not found in given string.
149	*/	152	*/
150	char strrchr(const char str, int c)	153	char strrchr(const char str, int c)
151	{	154	{
152	char *retval = NULL;	155	char *retval = NULL;
153		156
154	while (*str != '\0') {	157	while (*str != '\0') {
155	if (*str == (char)c)	158	if (*str == (char) c)
156	retval = (char *)str;	159	retval = (char *) str;
157	str++;	160	str++;
158	}	161	}
159		162
160	return (char *)retval;	163	return (char *) retval;
161	}	164	}
162		165
163	/** Convert string to a number.	166	/** Convert string to a number.
164	* Core of strtol and strtoul functions.	167	* Core of strtol and strtoul functions.
165	* @param nptr pointer to string	168	* @param nptr pointer to string
166	* @param endptr if not NULL, function stores here pointer to the first invalid character	169	* @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	170	* @param base zero or number between 2 and 36 inclusive
168	* @param sgn its set to 1 if minus found	171	* @param sgn its set to 1 if minus found
169	* @return result of conversion.	172	* @return result of conversion.
170	*/	173	*/
171	static unsigned long _strtoul(const char nptr, char endptr, int base, char sgn)	174	static unsigned long _strtoul(const char nptr, char endptr, int base, char sgn)
172	{	175	{
173	unsigned char c;	176	unsigned char c;
174	unsigned long result = 0;	177	unsigned long result = 0;
175	unsigned long a, b;	178	unsigned long a, b;
176	const char *str = nptr;	179	const char *str = nptr;
177	const char *tmpptr;	180	const char *tmpptr;
178		181
179	while (isspace(*str))	182	while (isspace(*str))
180	str++;	183	str++;
181		184
182	if (*str == '-') {	185	if (*str == '-') {
183	*sgn = 1;	186	*sgn = 1;
184	++str;	187	++str;
185	} else if (*str == '+')	188	} else if (*str == '+')
186	++str;	189	++str;
187		190
188	if (base) {	191	if (base) {
189	if ((base == 1) \|\| (base > 36)) {	192	if ((base == 1) \|\| (base > 36)) {
190	/* FIXME: set errno to EINVAL */	193	/* FIXME: set errno to EINVAL */
191	return 0;	194	return 0;
192	}	195	}
193	if ((base == 16) && (*str == '0') && ((str[1] == 'x') \|\| (str[1] == 'X'))) {	196	if ((base == 16) && (*str == '0') && ((str[1] == 'x') \|\| (str[1] == 'X'))) {
194	str += 2;	197	str += 2;
195	}	198	}
196	} else {	199	} else {
197	base = 10;	200	base = 10;
198		201
199	if (*str == '0') {	202	if (*str == '0') {
200	base = 8;	203	base = 8;
201	if ((str[1] == 'X') \|\| (str[1] == 'x')) {	204	if ((str[1] == 'X') \|\| (str[1] == 'x')) {
202	base = 16;	205	base = 16;
203	str += 2;	206	str += 2;
204	}	207	}
205	}	208	}
206	}	209	}
207		210
208	tmpptr = str;	211	tmpptr = str;
209		212
210	while (*str) {	213	while (*str) {
211	c = *str;	214	c = *str;
212	c = ( c >= 'a'? c-'a'+10:(c >= 'A'?c-'A'+10:(c <= '9'?c-'0':0xff)));	215	c = (c >= 'a' ? c - 'a' + 10 : (c >= 'A' ? c - 'A' + 10 : (c <= '9' ? c - '0' : 0xff)));
213	if (c > base) {	216	if (c > base) {
214	break;	217	break;
215	}	218	}
216		219
217	a = (result & 0xff) * base + c;	220	a = (result & 0xff) * base + c;
218	b = (result >> 8) * base + (a >> 8);	221	b = (result >> 8) * base + (a >> 8);
219		222
220	if (b > (ULONG_MAX >> 8)) {	223	if (b > (ULONG_MAX >> 8)) {
221	/* overflow */	224	/* overflow */
222	/* FIXME: errno = ERANGE*/	225	/* FIXME: errno = ERANGE*/
223	return ULONG_MAX;	226	return ULONG_MAX;
224	}	227	}
225		228
226	result = (b << 8) + (a & 0xff);	229	result = (b << 8) + (a & 0xff);
227	++str;	230	++str;
228	}	231	}
229		232
230	if (str == tmpptr) {	233	if (str == tmpptr) {
231	/* no number was found => first invalid character is the first character of the string */	234	/* no number was found => first invalid character is the first character of the string */
232	/* FIXME: set errno to EINVAL */	235	/* FIXME: set errno to EINVAL */
233	str = nptr;	236	str = nptr;
234	result = 0;	237	result = 0;
235	}	238	}
236		239
237	if (endptr)	240	if (endptr)
238	endptr = (char )str;	241	endptr = (char ) str;
239		242
240	if (nptr == str) {	243	if (nptr == str) {
241	/FIXME: errno = EINVAL/	244	/FIXME: errno = EINVAL/
242	return 0;	245	return 0;
243	}	246	}
244		247
245	return result;	248	return result;
246	}	249	}
247		250
248	/** Convert initial part of string to long int according to given base.	251	/** 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 `-').	252	* 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.	253	* 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).	254	* 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.	255	* Otherwise the base 0 is taken as decimal.
253	* @param nptr pointer to string	256	* @param nptr pointer to string
254	* @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
255	* @param base zero or number between 2 and 36 inclusive	258	* @param base zero or number between 2 and 36 inclusive
256	* @return result of conversion.	259	* @return result of conversion.
257	*/	260	*/
258	long int strtol(const char nptr, char *endptr, int base)	261	long int strtol(const char nptr, char *endptr, int base)
259	{	262	{
260	char sgn = 0;	263	char sgn = 0;
261	unsigned long number = 0;	264	unsigned long number = 0;
262		265
263	number = _strtoul(nptr, endptr, base, &sgn);	266	number = _strtoul(nptr, endptr, base, &sgn);
264		267
265	if (number > LONG_MAX) {	268	if (number > LONG_MAX) {
266	if ((sgn) && (number == (unsigned long)(LONG_MAX) + 1)) {	269	if ((sgn) && (number == (unsigned long) (LONG_MAX) + 1)) {
267	/* FIXME: set 0 to errno */	270	/* FIXME: set 0 to errno */
268	return number;	271	return number;
269	}	272	}
270	/* FIXME: set ERANGE to errno */	273	/* FIXME: set ERANGE to errno */
271	return (sgn?LONG_MIN:LONG_MAX);	274	return (sgn ? LONG_MIN : LONG_MAX);
272	}	275	}
273		276
274	return (sgn?-number:number);	277	return (sgn ? -number : number);
275	}	278	}
276		279
277		280
278	/** Convert initial part of string to unsigned long according to given base.	281	/** 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 `-').	282	* 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.	283	* 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).	284	* 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.	285	* Otherwise the base 0 is taken as decimal.
283	* @param nptr pointer to string	286	* @param nptr pointer to string
284	* @param endptr if not NULL, function stores here pointer to the first invalid character	287	* @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	288	* @param base zero or number between 2 and 36 inclusive
286	* @return result of conversion.	289	* @return result of conversion.
287	*/	290	*/
288	unsigned long strtoul(const char nptr, char *endptr, int base)	291	unsigned long strtoul(const char nptr, char *endptr, int base)
289	{	292	{
290	char sgn = 0;	293	char sgn = 0;
291	unsigned long number = 0;	294	unsigned long number = 0;
292		295
293	number = _strtoul(nptr, endptr, base, &sgn);	296	number = _strtoul(nptr, endptr, base, &sgn);
294		297
295	return (sgn?-number:number);	298	return (sgn ? -number : number);
296	}	299	}
297		300
298	char strcpy(char dest, const char *src)	301	char strcpy(char dest, const char *src)
299	{	302	{
-		303	char *orig = dest;
-		304
300	while ((dest++) = (src++))	305	while (((dest++) = (src++)));
301	;	306	return orig;
302	}	307	}
303		308
304	char strncpy(char dest, const char *src, size_t n)	309	char strncpy(char dest, const char *src, size_t n)
305	{	310	{
-		311	char *orig = dest;
-		312
306	while (((dest++) = (src++)) && --n)	313	while (((dest++) = (src++)) && --n);
307	;	314	return orig;
308	}	315	}
309		316
310		317
311	/** @}	318	/** @}
312	*/	319	*/
313		-
314		-
315		320

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(root)/uspace/trunk/libc/generic/string.c – Rev 1653 → 1719