string.c File Reference

#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_ONLY)
char *	strcpy (char *dest, const char *src)
	strcpy - Copy a NUL terminated string : Where to copy the string to : Where to copy the string from
char *	strncpy (char *dest, const char *src, size_t count)
	strncpy - Copy a length-limited, NUL-terminated string : Where to copy the string to : Where to copy the string from : The maximum number of bytes to copy
char *	strcat (char *dest, const char *src)
	strcat - Append one NUL-terminated string to another : The string to be appended to : The string to append to it
int	strcmp (const char *cs, const char *ct)
	strcmp - Compare two strings : One string : Another string
int	strcasecmp (const char *a, const char *b)
char *	strchr (const char *s, int c)
	strchr - Find the first occurrence of a character in a string : The string to be searched : The character to search for
char *	strrchr (const char *s, int c)
	strrchr - Find the last occurrence of a character in a string : The string to be searched : The character to search for
size_t	strnlen (const char *s, size_t count)
	strnlen - Find the length of a length-limited string : The string to be sized : The maximum number of bytes to search
int	memcmp (const void *cs, const void *ct, size_t count)
	memcmp - Compare two areas of memory : One area of memory : Another area of memory : The size of the area.
char *	strstr (const char *s1, const char *s2)
	strstr - Find the first substring in a NUL terminated string : The string to be searched : The string to search for
void *	memchr (const void *s, int c, size_t n)
	memchr - Find a character in an area of memory.
char *	strndup (const char *s, size_t n)
char *	strdup (const char *s)

---

Function Documentation

FILE_LICENCE

(

GPL2_ONLY

)

char* strcpy	(	char *	dest,
		const char *	src
	)

strcpy - Copy a NUL terminated string : Where to copy the string to : Where to copy the string from

Definition at line 39 of file string.c.

Referenced by apply_iscsi_string_setting(), ib_srp_parse_root_path(), ibft_set_string(), iscsi_parse_root_path(), net80211_prepare_assoc(), net80211_probe_start(), net80211_probe_step(), parse_setting_name(), and tftp_send_error().

{
        char *tmp = dest;

        while ((*dest++ = *src++) != '\0')
                /* nothing */;
        return tmp;
}

char* strncpy	(	char *	dest,
		const char *	src,
		size_t	count
	)

strncpy - Copy a length-limited, NUL-terminated string : Where to copy the string to : Where to copy the string from : The maximum number of bytes to copy

Note that unlike userspace strncpy, this does not NUL-pad the buffer. However, the result is not NUL-terminated if the source exceeds bytes.

Definition at line 60 of file string.c.

Referenced by efi_snp_driver_start(), image_set_name(), slk_set(), and undibus_probe().

{
        char *tmp = dest;

        while (count-- && (*dest++ = *src++) != '\0')
                /* nothing */;

        return tmp;
}

char* strcat	(	char *	dest,
		const char *	src
	)

strcat - Append one NUL-terminated string to another : The string to be appended to : The string to append to it

Definition at line 77 of file string.c.

Referenced by _print_label().

{
        char *tmp = dest;

        while (*dest)
                dest++;
        while ((*dest++ = *src++) != '\0')
                ;

        return tmp;
}

int strcmp	(	const char *	cs,
		const char *	ct
	)

strcmp - Compare two strings : One string : Another string

Definition at line 96 of file string.c.

Referenced by bzimage_parse_cmdline(), digest_exec(), execv(), find_child_settings(), find_gdb_transport(), find_image(), find_netdev(), find_setting(), find_setting_type(), iscsi_handle_authmethod_value(), iscsi_handle_chap_a_value(), iscsi_handle_chap_n_value(), net80211_check_settings_update(), net80211_probe_step(), netboot(), parse_settings_name(), setting_cmp(), sleep_exec(), test_parse_unparse(), test_resolve(), time_exec(), and xfer_open_uri().

{
        register signed char __res;

        while (1) {
                if ((__res = *cs - *ct++) != 0 || !*cs++)
                        break;
        }

        return __res;
}

int strcasecmp	(	const char *	a,
		const char *	b
	)

Definition at line 131 of file string.c.

Referenced by com32_identify(), comboot_identify(), http_rx_header(), sundance_probe(), and tftp_process_option().

{
        while (*a && *b && (*a & ~0x20) == (*b & ~0x20)) {a++; b++; }
        return((*a & ~0x20) - (*b & ~0x20));
}

char* strchr	(	const char *	s,
		int	c
	)

strchr - Find the first occurrence of a character in a string : The string to be searched : The character to search for

Definition at line 144 of file string.c.

References NULL.

Referenced by comboot_fetch_kernel(), dns_qualify_name(), http_rx_response(), iscsi_handle_targetaddress_value(), parse_setting_name(), parse_settings_name(), parse_uri(), slam_parse_multicast_address(), and tftp_process_multicast().

{
        for(; *s != (char) c; ++s)
                if (*s == '\0')
                        return NULL;
        return (char *) s;
}

char* strrchr	(	const char *	s,
		int	c
	)

strrchr - Find the last occurrence of a character in a string : The string to be searched : The character to search for

Definition at line 159 of file string.c.

References NULL, and strlen().

Referenced by basename(), com32_identify(), comboot_identify(), and dirname().

{
       const char *p = s + strlen(s);
       do {
           if (*p == (char)c)
               return (char *)p;
       } while (--p >= s);
       return NULL;
}

size_t strnlen	(	const char *	s,
		size_t	count
	)

strnlen - Find the length of a length-limited string : The string to be sized : The maximum number of bytes to search

Definition at line 191 of file string.c.

Referenced by iscsi_handle_strings(), tftp_rx_oack(), and used_len_string().

{
        const char *sc;

        for (sc = s; count-- && *sc != '\0'; ++sc)
                /* nothing */;
        return sc - s;
}

int memcmp	(	const void *	cs,
		const void *	ct,
		size_t	count
	)

memcmp - Compare two areas of memory : One area of memory : Another area of memory : The size of the area.

Definition at line 279 of file string.c.

Referenced by arp_find_entry(), ccmp_decrypt(), com32_identify(), eapol_key_rx(), efi_find_table(), elf_load(), elfboot_load(), eltorito_read_voldesc(), eth_probe(), find_ibdev(), ib_find_path_cache_entry(), ib_find_qp_mgid(), ib_mcast_detach(), ib_mi_handle(), ipoib_cache_peer(), ipv6_tx(), linda_verify_uc_ram(), mac_address_from_string_specs(), mtd_probe(), ne_probe(), net80211_rx(), nvs_verify(), script_load(), slam_pull_header(), strstr(), tftp_rx(), tkip_decrypt(), tkip_mix_1(), tls_new_ciphertext(), udp_demux(), wpa_check_pmkid(), wpa_derive_ptk(), wpa_handle_3_of_4(), and x509_rsa_public_key().

{
        const unsigned char *su1, *su2;
        int res = 0;

        for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
                if ((res = *su1 - *su2) != 0)
                        break;
        return res;
}

char* strstr	(	const char *	s1,
		const char *	s2
	)

strstr - Find the first substring in a NUL terminated string : The string to be searched : The string to search for

Definition at line 297 of file string.c.

References memcmp(), NULL, and strlen().

Referenced by bzimage_parse_cmdline(), comboot_fetch_kernel(), expand_command(), and http_rx_header().

{
        int l1, l2;

        l2 = strlen(s2);
        if (!l2)
                return (char *) s1;
        l1 = strlen(s1);
        while (l1 >= l2) {
                l1--;
                if (!memcmp(s1,s2,l2))
                        return (char *) s1;
                s1++;
        }
        return NULL;
}

void* memchr	(	const void *	s,
		int	c,
		size_t	n
	)

memchr - Find a character in an area of memory.

: The memory area : The byte to search for
: The size of the area.

returns the address of the first occurrence of , or NULL if is not found

Definition at line 325 of file string.c.

References NULL.

Referenced by line_buffer(), and trivial_memchr_user().

{
        const unsigned char *p = s;
        while (n-- != 0) {
                if ((unsigned char)c == *p++) {
                        return (void *)(p-1);
                }
        }
        return NULL;
}

char* strndup	(	const char *	s,
		size_t	n
	)

Definition at line 338 of file string.c.

References malloc(), memcpy, and strlen().

Referenced by strdup().

{
        size_t len = strlen(s);
        char *new;

        if (len>n)
                len = n;
        new = malloc(len+1);
        if (new) {
                new[len] = '\0';
                memcpy(new,s,len);
        }
        return new;
}

char* strdup

(

const char *

s

)

Definition at line 353 of file string.c.

References strndup().

Referenced by dns_qualify_name(), expand_command(), image_set_cmdline(), iscsi_handle_targetaddress_value(), iscsi_parse_root_path(), iscsi_set_auth(), readline(), and resolve_path().

                             {
        return strndup(s, ~((size_t)0));
}