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Infer shader type from suffix on filename

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This commit is contained in:
Ian Romanick
2010-06-15 12:00:37 -07:00
parent 54992c30b0
commit 2b36895f0c
1 changed files with 24 additions and 19 deletions
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main.cpp
+24 -19
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@@ -78,6 +78,14 @@ load_text_file(const char *file_name, size_t *size)
}
void
usage_fail(const char *name)
{
printf("%s <filename.frag|filename.vert>\n", name);
exit(EXIT_FAILURE);
}
int
main(int argc, char **argv)
{
@@ -86,29 +94,26 @@ main(int argc, char **argv)
size_t shader_len;
exec_list instructions;
if (argc < 3) {
printf("Usage: %s [v|g|f|i] <shader_file>\n", argv[0]);
return EXIT_FAILURE;
}
if (argc < 2)
usage_fail(argv[0]);
memset(& state, 0, sizeof(state));
switch (argv[1][0]) {
case 'v':
state.target = vertex_shader;
break;
case 'g':
state.target = geometry_shader;
break;
case 'f':
state.target = fragment_shader;
break;
default:
printf("Usage: %s [v|g|f] <shader_file>\n", argv[0]);
return EXIT_FAILURE;
}
const unsigned len = strlen(argv[1]);
if (len < 6)
usage_fail(argv[0]);
shader = load_text_file(argv[2], & shader_len);
const char *const ext = & argv[1][len - 5];
if (strncmp(".vert", ext, 5) == 0)
state.target = vertex_shader;
else if (strncmp(".geom", ext, 5) == 0)
state.target = geometry_shader;
else if (strncmp(".frag", ext, 5) == 0)
state.target = fragment_shader;
else
usage_fail(argv[0]);
shader = load_text_file(argv[1], & shader_len);
state.scanner = NULL;
state.translation_unit.make_empty();