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nir/spirv: improve lseek() error handling

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Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Eric Engestrom 2016-09-25 16:49:51 +01:00 • committed by Jason Ekstrand
parent 23519a9de2
commit 65c8cbe89d
1 changed files with 10 additions and 2 deletions
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12
src/compiler/spirv/spirv2nir.c
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@ -39,6 +39,8 @@
#include <unistd.h>
#include <stdio.h>
#define WORD_SIZE 4
int main(int argc, char **argv)
{
int fd = open(argv[1], O_RDONLY);
@ -49,9 +51,15 @@ int main(int argc, char **argv)
}
off_t len = lseek(fd, 0, SEEK_END);
if (len % WORD_SIZE != 0)
{
fprintf(stderr, "File length isn't a multiple of the word size\n");
fprintf(stderr, "Are you sure this is a valid SPIR-V shader?\n");
close(fd);
return 1;
}
assert(len % 4 == 0);
size_t word_count = len / 4;
size_t word_count = len / WORD_SIZE;
const void *map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
assert(map != NULL);