mirror of
https://github.com/R2Northstar/NorthstarLauncher
synced 2026-08-23 20:26:04 -04:00
f5ab6fb5e8
Copies of over the primedev folder structure for easier cherry-picking of further changes Co-authored-by: F1F7Y <filip.bartos07@proton.me>
82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
#include <ctype.h>
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#include "utils.h"
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bool skip_valid_ansi_csi_sgr(char*& str)
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{
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if (*str++ != '\x1B')
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return false;
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if (*str++ != '[') // CSI
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return false;
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for (char* c = str; *c; c++)
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{
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if (*c >= '0' && *c <= '9')
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continue;
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if (*c == ';' || *c == ':')
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continue;
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if (*c == 'm') // SGR
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break;
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return false;
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}
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return true;
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}
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void RemoveAsciiControlSequences(char* str, bool allow_color_codes)
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{
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for (char *pc = str, c = *pc; c = *pc; pc++)
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{
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// skip UTF-8 characters
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int bytesToSkip = 0;
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if ((c & 0xE0) == 0xC0)
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bytesToSkip = 1; // skip 2-byte UTF-8 sequence
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else if ((c & 0xF0) == 0xE0)
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bytesToSkip = 2; // skip 3-byte UTF-8 sequence
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else if ((c & 0xF8) == 0xF0)
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bytesToSkip = 3; // skip 4-byte UTF-8 sequence
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else if ((c & 0xFC) == 0xF8)
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bytesToSkip = 4; // skip 5-byte UTF-8 sequence
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else if ((c & 0xFE) == 0xFC)
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bytesToSkip = 5; // skip 6-byte UTF-8 sequence
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bool invalid = false;
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char* orgpc = pc;
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for (int i = 0; i < bytesToSkip; i++)
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{
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char next = pc[1];
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// valid UTF-8 part
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if ((next & 0xC0) == 0x80)
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{
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pc++;
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continue;
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}
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// invalid UTF-8 part or encountered \0
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invalid = true;
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break;
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}
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if (invalid)
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{
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// erase the whole "UTF-8" sequence
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for (char* x = orgpc; x <= pc; x++)
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if (*x != '\0')
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*x = ' ';
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else
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break;
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}
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if (bytesToSkip > 0)
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continue; // this byte was already handled as UTF-8
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// an invalid control character or an UTF-8 part outside of UTF-8 sequence
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if ((iscntrl(c) && c != '\n' && c != '\r' && c != '\x1B') || (c & 0x80) != 0)
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{
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*pc = ' ';
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continue;
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}
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if (c == '\x1B') // separate handling for this escape sequence...
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if (allow_color_codes && skip_valid_ansi_csi_sgr(pc)) // ...which we allow for color codes...
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pc--;
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else // ...but remove it otherwise
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*pc = ' ';
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}
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}
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