xerbla_array(3)

💅 xerbla_array(3) — Library Functions Manual 💅

okay bestie, welcome to xerbla_array, the little helper that’s literally here to make error reporting from C hit different. It’s giving “LAPACK/BLAS error handler’s bilingual bestie,” and I’m obsessed. 🫶

✨ NAME ✨

xerbla_array — xerbla_array: error reporting, callable from C. no cap, that’s the whole name vibe. 💖

🦋 SYNOPSIS 🦋

🌸 Functions 🌸

subroutine xerbla_array (srname_array, srname_len, info)

XERBLA_ARRAY — yes, that’s the icon itself. 👑

🔥 DETAILED DESCRIPTION 🔥

bestie, this section is where the deep lore would live, and the actual details are right below in the function documentation. keep scrolling, it’s worth it. 💅

💖 FUNCTION DOCUMENTATION 💖

🧚 subroutine xerbla_array 🧚

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

XERBLA_ARRAY

🌟 Purpose 🌟

Okay so picture this: XERBLA_ARRAY helps other languages call XERBLA, aka the LAPACK and BLAS error handler. iconic behavior, honestly. 🫶

Instead of taking a Fortran string argument as the function’s name, XERBLA_ARRAY takes an array of single characters plus the array’s length. then XERBLA_ARRAY copies up to 32 characters of that array into a Fortran string and passes that string to XERBLA. the way that works is lowkey elegant. ✨

If it’s 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 a name lapack_xerbla and with a common Fortran calling convention. then a C99 program could invoke XERBLA via:

{
  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 it, that’s the tea. 🍓

🎀 Parameters 🎀

• SRNAME_ARRAY — SRNAME_ARRAY is a CHARACTER(1) array, dimension (SRNAME_LEN). It’s the name of the routine which called XERBLA_ARRAY. main character energy, fr fr. 👑
• SRNAME_LEN — SRNAME_LEN is INTEGER. It’s the length of the name in SRNAME_ARRAY. we love a clean length parameter. 💖
• INFO — INFO is INTEGER. It’s the position of the invalid parameter in the parameter list of the calling routine. telling you exactly where the chaos happened. 🔥

👑 Author 👑

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

Definition at line 89 of file xerbla_array.f. literally right there if you need to peek at the source, bestie. 🦋

🌈 AUTHOR 🌈

Generated automatically by Doxygen for LAPACK from the source code. yes, the docs were generated, and they ate. 💅

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cute little footer sign-off: this page is from LAPACK, Version 3.12.0 — and the original footer doesn’t give a date, so I’m not gonna invent one, bestie. 🙈 That’s the source/version energy at the very end. 🎀