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Diffstat (limited to 'man3/string.3')
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diff --git a/man3/string.3 b/man3/string.3 new file mode 100644 index 0000000..dc1c415 --- /dev/null +++ b/man3/string.3 @@ -0,0 +1,224 @@ +.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" References consulted: +.\" Linux libc source code +.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) +.\" 386BSD man pages +.\" Modified Sun Jul 25 10:54:31 1993, Rik Faith (faith@cs.unc.edu) +.TH string 3 2023-01-22 "Linux man-pages 6.05.01" +.SH NAME +stpcpy, strcasecmp, strcat, strchr, strcmp, strcoll, strcpy, strcspn, +strdup, strfry, strlen, strncat, strncmp, strncpy, strncasecmp, strpbrk, +strrchr, strsep, strspn, strstr, strtok, strxfrm, index, rindex +\- string operations +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.B #include <strings.h> +.TP +.BI "int strcasecmp(const char *" s1 ", const char *" s2 ); +Compare the strings +.I s1 +and +.I s2 +ignoring case. +.TP +.BI "int strncasecmp(const char " s1 [. n "], const char " s2 [. n "], \ +size_t " n ); +Compare the first +.I n +bytes of the strings +.I s1 +and +.I s2 +ignoring case. +.TP +.BI "char *index(const char *" s ", int " c ); +Identical to +.BR strchr (3). +.TP +.BI "char *rindex(const char *" s ", int " c ); +Identical to +.BR strrchr (3). +.TP +.B #include <string.h> +.TP +.BI "char *stpcpy(char *restrict " dest ", const char *restrict " src ); +Copy a string from +.I src +to +.IR dest , +returning a pointer to the end of the resulting string at +.IR dest . +.TP +.BI "char *strcat(char *restrict " dest ", const char *restrict " src ); +Append the string +.I src +to the string +.IR dest , +returning a pointer +.IR dest . +.TP +.BI "char *strchr(const char *" s ", int " c ); +Return a pointer to the first occurrence of the character +.I c +in the string +.IR s . +.TP +.BI "int strcmp(const char *" s1 ", const char *" s2 ); +Compare the strings +.I s1 +with +.IR s2 . +.TP +.BI "int strcoll(const char *" s1 ", const char *" s2 ); +Compare the strings +.I s1 +with +.I s2 +using the current locale. +.TP +.BI "char *strcpy(char *restrict " dest ", const char *restrict " src ); +Copy the string +.I src +to +.IR dest , +returning a pointer to the start of +.IR dest . +.TP +.BI "size_t strcspn(const char *" s ", const char *" reject ); +Calculate the length of the initial segment of the string +.I s +which does not contain any of bytes in the string +.IR reject , +.TP +.BI "char *strdup(const char *" s ); +Return a duplicate of the string +.I s +in memory allocated using +.BR malloc (3). +.TP +.BI "char *strfry(char *" string ); +Randomly swap the characters in +.IR string . +.TP +.BI "size_t strlen(const char *" s ); +Return the length of the string +.IR s . +.TP +.nf +.BI "char *strncat(char " dest "[restrict strlen(." dest ") + ." n " + 1]," +.BI " const char " src "[restrict ." n ], +.BI " size_t " n ); +.fi +Append at most +.I n +bytes from the unterminated string +.I src +to the string +.IR dest , +returning a pointer to +.IR dest . +.TP +.BI "int strncmp(const char " s1 [. n "], const char " s2 [. n "], size_t " n ); +Compare at most +.I n +bytes of the strings +.I s1 +and +.IR s2 . +.TP +.BI "char *strpbrk(const char *" s ", const char *" accept ); +Return a pointer to the first occurrence in the string +.I s +of one of the bytes in the string +.IR accept . +.TP +.BI "char *strrchr(const char *" s ", int " c ); +Return a pointer to the last occurrence of the character +.I c +in the string +.IR s . +.TP +.BI "char *strsep(char **restrict " stringp ", const char *restrict " delim ); +Extract the initial token in +.I stringp +that is delimited by one of the bytes in +.IR delim . +.TP +.BI "size_t strspn(const char *" s ", const char *" accept ); +Calculate the length of the starting segment in the string +.I s +that consists entirely of bytes in +.IR accept . +.TP +.BI "char *strstr(const char *" haystack ", const char *" needle ); +Find the first occurrence of the substring +.I needle +in the string +.IR haystack , +returning a pointer to the found substring. +.TP +.BI "char *strtok(char *restrict " s ", const char *restrict " delim ); +Extract tokens from the string +.I s +that are delimited by one of the bytes in +.IR delim . +.TP +.nf +.BI "size_t strxfrm(char " dest "[restrict ." n "], \ +const char " src "[restrict ." n ], +.BI " size_t " n ); +.fi +Transforms +.I src +to the current locale and copies the first +.I n +bytes to +.IR dest . +.SS Obsolete functions +.TP +.nf +.BI "char *strncpy(char " dest "[restrict ." n "], \ +const char " src "[restrict ." n ], +.BI " size_t " n ); +.fi +Copy at most +.I n +bytes from string +.I src +to +.IR dest , +returning a pointer to the start of +.IR dest . +.SH DESCRIPTION +The string functions perform operations on null-terminated +strings. +See the individual man pages for descriptions of each function. +.SH SEE ALSO +.BR bstring (3), +.BR stpcpy (3), +.BR strcasecmp (3), +.BR strcat (3), +.BR strchr (3), +.BR strcmp (3), +.BR strcoll (3), +.BR strcpy (3), +.BR strcspn (3), +.BR strdup (3), +.BR strfry (3), +.BR strlen (3), +.BR strncasecmp (3), +.BR strncat (3), +.BR strncmp (3), +.BR strncpy (3), +.BR strpbrk (3), +.BR strrchr (3), +.BR strsep (3), +.BR strspn (3), +.BR strstr (3), +.BR strtok (3), +.BR strxfrm (3) |