FlapJackApps/libdc
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Limit the size to INT_MAX

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Allthough the input buffer size has type 'size_t', the return value of
the function has only type 'int'. Hence the function can't support input
buffers larger than INT_MAX.

This allows to fix a -Wsign-compare compiler warning: operand of ?:
changes signedness from ‘int’ to ‘size_t’ due to unsignedness of other
operand.
This commit is contained in:
Jef Driesen 2020-07-22 00:26:07 +02:00
parent 10a4ec0b08
commit b0cce363f1
1 changed files with 3 additions and 2 deletions
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5
src/context.c
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@ -27,6 +27,7 @@
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <limits.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
@ -104,7 +105,7 @@ l_hexdump (char *str, size_t size, const unsigned char data[], size_t n)
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
if (size == 0)
if (size == 0 || size > INT_MAX)
return -1;
/* The maximum number of bytes. */
@ -126,7 +127,7 @@ l_hexdump (char *str, size_t size, const unsigned char data[], size_t n)
/* Null terminate the hex string. */
str[length * 2] = 0;
return (n > maxlength ? -1 : length * 2);
return (n > maxlength ? -1 : (int) (length * 2));
}
static void