Linux Manuals session 3

strdup, strndup, strdupa, strndupa – duplicate a string Synopsis #include <string.h> char *strdup(const char *s); char *strndup(const char *s, size_t n); char *strdupa(const char *s); char *strndupa(const char *s, size_t n); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): strdup(): _XOPEN_SOURCE >= 500     || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L     || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE strndup(): Since glibc 2.10: _POSIX_C_SOURCE >= 200809L Before glibc 2.10:…

strspn, strcspn – get length of a prefix substring Synopsis #include <string.h> size_t strspn(const char *s, const char *accept); size_t strcspn(const char *s, const char *reject); Description The strspn() function calculates the length (in bytes) of the initial segment of s which consists entirely of bytes in accept. The strcspn() function calculates the length of…

strcon.f – Synopsis Functions/Subroutines subroutine strcon (NORM, UPLO, DIAG, N, A, LDA, RCOND, WORK, IWORK, INFO) STRCON Function/Subroutine Documentation subroutine strcon (characterNORM, characterUPLO, characterDIAG, integerN, real, dimension( lda, * )A, integerLDA, realRCOND, real, dimension( * )WORK, integer, dimension( * )IWORK, integerINFO) STRCON Purpose: STRCON estimates the reciprocal of the condition number of a triangular matrix…

strcon.f – Synopsis Functions/Subroutines subroutine strcon (NORM, UPLO, DIAG, N, A, LDA, RCOND, WORK, IWORK, INFO) STRCON Function/Subroutine Documentation subroutine strcon (characterNORM, characterUPLO, characterDIAG, integerN, real, dimension( lda, * )A, integerLDA, realRCOND, real, dimension( * )WORK, integer, dimension( * )IWORK, integerINFO) STRCON Purpose: STRCON estimates the reciprocal of the condition number of a triangular matrix…

strcoll – compare two strings using the current locale Synopsis #include <string.h> int strcoll(const char *s1, const char *s2); Description The strcoll() function compares the two strings s1 and s2. It returns an integer less than, equal to, or greater than zero if s1 is found, respectively, to be less than, to match, or be…

strcmp, strncmp – compare two strings Synopsis #include <string.h> int strcmp(const char *s1, const char *s2); int strncmp(const char *s1, const char *s2, size_t n); Description The strcmp() function compares the two strings s1 and s2. The locale is not taken into account (for a locale-aware comparison, see strcoll(3)). The comparison is done using unsigned…

strchr, strrchr, strchrnul – locate character in string Synopsis #include <string.h> char *strchr(const char *s, int c); char *strrchr(const char *s, int c); #define _GNU_SOURCE /* See feature_test_macros(7) */ #include <string.h> char *strchrnul(const char *s, int c); Description The strchr() function returns a pointer to the first occurrence of the character c in the string…

strchr, strrchr, strchrnul – locate character in string Synopsis #include <string.h> char *strchr(const char *s, int c); char *strrchr(const char *s, int c); #define _GNU_SOURCE /* See feature_test_macros(7) */ #include <string.h> char *strchrnul(const char *s, int c); Description The strchr() function returns a pointer to the first occurrence of the character c in the string…

strcat, strncat – concatenate two strings Synopsis #include <string.h> char *strcat(char *dest, const char *src); char *strncat(char *dest, const char *src, size_t n); Description The strcat() function appends the src string to the dest string, overwriting the terminating null byte (‘

strstr, strcasestr – locate a substring Synopsis #include <string.h> char *strstr(const char *haystack, const char *needle); #define _GNU_SOURCE /* See feature_test_macros(7) */ #include <string.h> char *strcasestr(const char *haystack, const char *needle); Description The strstr() function finds the first occurrence of the substring needle in the string haystack. The terminating null bytes (‘

strcasecmp, strncasecmp – compare two strings ignoring case Synopsis #include <strings.h> int strcasecmp(const char *s1, const char *s2); int strncasecmp(const char *s1, const char *s2, size_t n); Description The strcasecmp() function performs a byte-by-byte comparison of the strings s1 and s2, ignoring the case of the characters. It returns an integer less than, equal to,…

stpttr.f – Synopsis Functions/Subroutines subroutine stpttr (UPLO, N, AP, A, LDA, INFO) STPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR). Function/Subroutine Documentation subroutine stpttr (characterUPLO, integerN, real, dimension( * )AP, real, dimension( lda, * )A, integerLDA, integerINFO) STPTTR copies a triangular matrix from the standard packed…

stpttr.f – Synopsis Functions/Subroutines subroutine stpttr (UPLO, N, AP, A, LDA, INFO) STPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR). Function/Subroutine Documentation subroutine stpttr (characterUPLO, integerN, real, dimension( * )AP, real, dimension( lda, * )A, integerLDA, integerINFO) STPTTR copies a triangular matrix from the standard packed…

stpttf.f – Synopsis Functions/Subroutines subroutine stpttf (TRANSR, UPLO, N, AP, ARF, INFO) STPTTF copies a triangular matrix from the standard packed format (TP) to the rectangular full packed format (TF). Function/Subroutine Documentation subroutine stpttf (characterTRANSR, characterUPLO, integerN, real, dimension( 0: * )AP, real, dimension( 0: * )ARF, integerINFO) STPTTF copies a triangular matrix from the…

stptrs.f – Synopsis Functions/Subroutines subroutine stptrs (UPLO, TRANS, DIAG, N, NRHS, AP, B, LDB, INFO) STPTRS Function/Subroutine Documentation subroutine stptrs (characterUPLO, characterTRANS, characterDIAG, integerN, integerNRHS, real, dimension( * )AP, real, dimension( ldb, * )B, integerLDB, integerINFO) STPTRS Purpose: STPTRS solves a triangular system of the form A * X = B or A**T * X…

stptri.f – Synopsis Functions/Subroutines subroutine stptri (UPLO, DIAG, N, AP, INFO) STPTRI Function/Subroutine Documentation subroutine stptri (characterUPLO, characterDIAG, integerN, real, dimension( * )AP, integerINFO) STPTRI Purpose: STPTRI computes the inverse of a real upper or lower triangular matrix A stored in packed format.   Parameters: UPLO UPLO is CHARACTER*1 = ‘U’: A is upper triangular;…

stpsv.f – Synopsis Functions/Subroutines subroutine stpsv (UPLO, TRANS, DIAG, N, AP, X, INCX) STPSV Function/Subroutine Documentation subroutine stpsv (characterUPLO, characterTRANS, characterDIAG, integerN, real, dimension(*)AP, real, dimension(*)X, integerINCX) STPSV Purpose: STPSV solves one of the systems of equations A*x = b, or A**T*x = b, where b and x are n element vectors and A is…

stprfs.f – Synopsis Functions/Subroutines subroutine stprfs (UPLO, TRANS, DIAG, N, NRHS, AP, B, LDB, X, LDX, FERR, BERR, WORK, IWORK, INFO) STPRFS Function/Subroutine Documentation subroutine stprfs (characterUPLO, characterTRANS, characterDIAG, integerN, integerNRHS, real, dimension( * )AP, real, dimension( ldb, * )B, integerLDB, real, dimension( ldx, * )X, integerLDX, real, dimension( * )FERR, real, dimension( * )BERR,…

stprfb.f – Synopsis Functions/Subroutines subroutine stprfb (SIDE, TRANS, DIRECT, STOREV, M, N, K, L, V, LDV, T, LDT, A, LDA, B, LDB, WORK, LDWORK) STPRFB applies a real or complex ‘triangular-pentagonal’ blocked reflector to a real or complex matrix, which is composed of two blocks. Function/Subroutine Documentation subroutine stprfb (characterSIDE, characterTRANS, characterDIRECT, characterSTOREV, integerM, integerN,…

stpqrt2.f – Synopsis Functions/Subroutines subroutine stpqrt2 (M, N, L, A, LDA, B, LDB, T, LDT, INFO) STPQRT2 computes a QR factorization of a real or complex ‘triangular-pentagonal’ matrix, which is composed of a triangular block and a pentagonal block, using the compact WY representation for Q. Function/Subroutine Documentation subroutine stpqrt2 (integerM, integerN, integerL, real, dimension(…