XMTEXTFIELDGETSUBSTRINGWCS(3)

💖 NAME 💖

okay so bestie, welcome to XmTextFieldGetSubstringWcs — a TextField function that retrieves a portion of a wide character internal text buffer. yes it's a whole mouthful, no we are not renaming it, it's iconic. ✨

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🎀 SYNOPSIS 🎀

#include <Xm/TextF.h>
int XmTextFieldGetSubstringWcs(
Widget widget,
XmTextPosition start,
int num_chars,
int buffer_size,
wchar_t *buffer);

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🦋 DESCRIPTION 🦋

so what does it actually do? XmTextFieldGetSubstringWcs retrieves a copy of a portion of the internal text buffer of a TextField widget that is stored in a wide character format. basically it copies a specified number of characters from a given start position in the internal text buffer into a buffer provided by the application. and then — the lil cherry on top — a NULL terminator is placed at the end of the copied data. 🍓

now the cast of characters, one by one:

• widget — Specifies the TextField widget ID. the main character, the one you're pulling text out of 💅
• start — Specifies the beginning character position from which the data will be retrieved. This is an integer number of characters from the beginning of the text buffer. and the first character position is 0 (zero). yes zero. not one. zero. we start counting from zero in this house 🔥
• num_chars — Specifies the number of wchar_t characters to be copied into the provided buffer.
• buffer_size — Specifies the size of the supplied buffer as a number of wchar_t storage locations. The minimum size is num_chars + 1. (that + 1 is for the NULL terminator, she's not optional, she's required 🫶)
• buffer — Specifies the wide character buffer into which the internal text buffer will be copied.

and if you want the full lore on TextField and its associated resources, go read XmTextField(3). iykyk 📖

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⭐ RETURN ⭐

here's the vibe check on what you get back:

• XmCOPY_SUCCEEDED — The function was successful. slay, you ate, congrats 🎉
• XmCOPY_FAILED — The function failed because it was unable to copy the specified number of characters into the buffer provided. The buffer size may be insufficient. The contents of buffer are undefined.

😭 okay real talk on this one: if you get XmCOPY_FAILED, the contents of buffer are undefined. do not read them. do not trust them. do not pass go. undefined means undefined, periodt.

• XmCOPY_TRUNCATED — The requested number of characters extended beyond the internal buffer. The function copied characters to the end of the buffer and terminated the string with a NULL terminator; fewer than num_chars characters were copied. so you got some of it, just not all of it. partial delivery, still delivered 💀

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🌈 RELATED 🌈

• XmTextField(3)
• XmTextFieldGetSubstring(3)

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and that's the whole page bestie!! 🌸 this came out of the library call section of the manual — the page header/footer situation was just XmTextField...ubstringWcs(library call), the truncated lil glow-up version of the name, sitting at the top and the bottom like bookends. anyway, go copy some wide characters, drink water, and remember your + 1. mwah 💖🧚✨