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Fix printf(3) handling of negative precision.

This commit is contained in:
Jonas 'Sortie' Termansen 2021-02-12 23:49:42 +01:00
parent aadeef6a7c
commit 50543d3c36
1 changed files with 4 additions and 3 deletions
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7
libc/stdio/vcbprintf.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2011, 2012, 2013, 2014, 2015 Jonas 'Sortie' Termansen.
* Copyright (c) 2011, 2012, 2013, 2014, 2015, 2021 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -129,11 +129,11 @@ int vcbprintf(void* ctx,
size_t precision = SIZE_MAX;
if ( *format == '.' && (format++, true) )
{
precision = 0;
if ( *format == '*' && (format++, true) )
{
int int_precision = va_arg(parameters, int);
precision = 0 <= int_precision ? (size_t) int_precision : 0;
if ( 0 <= int_precision )
precision = (size_t) int_precision;
}
else if ( *format == '-' && (format++, true) )
{
@ -142,6 +142,7 @@ int vcbprintf(void* ctx,
}
else
{
precision = 0;
while ( '0' <= *format && *format <= '9' )
precision = 10 * precision + *format++ - '0';
}