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Bumped prefix checker on is_text_file

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Bruce Hill 2021-01-18 12:57:35 -08:00
parent e82fcefac8
commit 62f866e370
1 changed files with 4 additions and 1 deletions
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5
bp.c
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@ -48,6 +48,9 @@ static const char *usage = (
" -c --context <context> set number of lines of context to print (all: the whole file, 0: only the match, 1: the line, N: N lines of context)\n"
" -g --grammar <grammar file> use the specified file as a grammar\n");
// Used as a heuristic to check if a file is binary or text:
#define CHECK_FIRST_N_BYTES 128
// Flag-configurable options:
#define USE_DEFAULT_CONTEXT -2
#define ALL_CONTEXT -1
@ -132,7 +135,7 @@ static int is_text_file(const char *filename)
{
int fd = open(filename, O_RDONLY);
if (fd < 0) return 0;
char buf[64];
char buf[CHECK_FIRST_N_BYTES];
ssize_t len = read(fd, buf, sizeof(buf)/sizeof(char));
if (len < 0) return 0;
(void)close(fd);