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Merge branch 'allow_strip_esc_key' of https://github.com/nh26223/tio into nh26223-allow_strip_esc_key

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This commit is contained in:
Martin Lund 2022-06-15 22:49:22 +02:00
commit 256d6b4fc2
6 changed files with 99 additions and 2 deletions
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79
src/log.c
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@ -31,6 +31,10 @@
#include "print.h"
#include "error.h"
#define IS_ESC_CSI_INTERMEDIATE_CHAR(c) ((c >= 0x20) && (c <= 0x3F))
#define IS_ESC_END_CHAR(c) ((c >= 0x30) && (c <= 0x7E))
#define IS_CTRL_CHAR(c) ((c >= 0x00) && (c <= 0x1F))
static FILE *fp;
static bool log_error = false;
@ -70,11 +74,84 @@ void log_open(const char *filename)
setvbuf(fp, NULL, _IONBF, 0);
}
bool log_strip(char c)
{
static char previous_char = 0;
static bool esc_sequence = false;
bool strip = false;
/* Detect if character should be stripped or not */
switch (c)
{
case 0x8:
/* Backspace */
break;
case 0xa:
/* Line feed */
/* Reset ESC sequence just in case something went wrong with the
* escape sequence parsing. */
esc_sequence = false;
break;
case 0x1b:
/* Escape */
strip = true;
break;
case 0x5b:
/* Left bracket */
if (previous_char == 0x1b)
{
// Start of ESC sequence
esc_sequence = true;
strip = true;
}
break;
default:
if (IS_CTRL_CHAR(c))
{
/* Strip ASCII control characters */
strip = true;
break;
}
else
if ((esc_sequence) && (IS_ESC_CSI_INTERMEDIATE_CHAR(c)))
{
strip = true;
break;
}
else
if ((esc_sequence) && (IS_ESC_END_CHAR(c)))
{
esc_sequence = false;
strip = true;
break;
}
break;
}
previous_char = c;
return strip;
}
void log_write(char c)
{
if (fp != NULL)
{
fputc(c, fp);
if (option.log_strip)
{
if (!log_strip(c))
{
fputc(c, fp);
}
}
else
{
fputc(c, fp);
}
}
}