SRC/xerbla_array.f(3)

okay so this page is SRC/xerbla_array.f(3), and it’s from the Library Functions Manual — manual name folded in near the top, as requested, bestie 💖

🌸 NAME 🌸

SRC/xerbla_array.f

✨ SYNOPSIS ✨

🫶 Functions/Subroutines

• subroutine xerbla_array (srname_array, srname_len, info) — XERBLA_ARRAY

💅 Function/Subroutine Documentation 💅

🎀 subroutine xerbla_array (character(1), dimension(srname_len) srname_array, integer srname_len, integer info)

XERBLA_ARRAY is the main character here 👑

🎯 Purpose

Okay so XERBLA_ARRAY assists other languages in calling XERBLA, the LAPACK and BLAS error handler 💅. Instead of taking a Fortran string argument as the function’s name, XERBLA_ARRAY takes an array of single characters along with the array’s length. Then it copies up to 32 characters of that array into a Fortran string and passes that to XERBLA. If called with a non-positive SRNAME_LEN, XERBLA_ARRAY will call XERBLA with a string of all blank characters. Periodt 💖

Say some macro or other device makes XERBLA_ARRAY available to C99 by the name lapack_xerbla and with a common Fortran calling convention. Then a C99 program could invoke XERBLA via this exact code snack:

    {
      int flen = strlen(__func__);
      lapack_xerbla(__func__, &flen, &info);
    }

Providing XERBLA_ARRAY is not necessary for intercepting LAPACK errors. XERBLA_ARRAY calls XERBLA. That’s the tea ☕

📋 Parameters

• SRNAME_ARRAY — SRNAME_ARRAY is CHARACTER(1) array, dimension (SRNAME_LEN). The name of the routine which called XERBLA_ARRAY.
• SRNAME_LEN — SRNAME_LEN is INTEGER. The length of the name in SRNAME_ARRAY.
• INFO — INFO is INTEGER. The position of the invalid parameter in the parameter list of the calling routine.

👑 Author

• Univ. of Tennessee
• Univ. of California Berkeley
• Univ. of Colorado Denver
• NAG Ltd.

Definition at line 89 of file xerbla_array.f.

🧚 Author 🧚

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Sign-off time, bestie: LAPACK Version 3.12.0, source SRC/xerbla_array.f(3). The footer is giving version + source, with no separate date line in this one — and that’s the wrap 🫶🌈💖