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Code Issues 1 Releases Wiki Activity

Add keyword flag utility for modules.

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This commit is contained in:
Calvin Rose
2019-06-12 12:05:01 -04:00
parent b4e25e5597
commit 5689ef1af1
3 changed files with 31 additions and 30 deletions
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18
src/core/capi.c
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@@ -250,6 +250,24 @@ void janet_setdyn(const char *name, Janet value) {
janet_table_put(janet_vm_fiber->env, janet_ckeywordv(name), value);
}
uint64_t janet_getflags(const Janet *argv, int32_t n, const char *flags) {
uint64_t ret = 0;
const uint8_t *keyw = janet_getkeyword(argv, n);
int32_t klen = janet_string_length(keyw);
int32_t flen = strlen(flags);
if (flen > 64) {
flen = 64;
}
for (int32_t j = 0; j < klen; j++) {
for (int32_t i = 0; i < flen; i++) {
if (((uint8_t) flags[i]) == keyw[j]) {
ret |= 1ULL << i;
}
}
}
return ret;
}
/* Some definitions for function-like macros */
JANET_API JanetStructHead *(janet_struct_head)(const JanetKV *st) {

41
src/core/os.c
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@@ -102,29 +102,7 @@ static Janet os_getenv(int32_t argc, Janet *argv) {
#else
/* Provide full os functionality */
#define JANET_OS_EFLAG_E 0x1
#define JANET_OS_EFLAG_P 0x2
/* Get flags */
/* Unfortunately, execvpe is linux (glibc) only. Instead, we can switch
* between the more portable execve, execvp, or execv.
* Use the :e or :p flag for execve and execvp respectively. Eventually
* :ep or :pe could be execvpe. */
static int os_execute_flags(int32_t argc, const Janet *argv) {
if (argc < 2) return 0;
int flags = 0;
if (argc > 1) {
const uint8_t *f = janet_getkeyword(argv, 1);
int32_t len = janet_string_length(f);
for (int32_t i = 0; i < len; i++) {
if (f[i] == 'e') flags |= JANET_OS_EFLAG_E;
if (f[i] == 'p') flags |= JANET_OS_EFLAG_P;
}
}
return flags;
}
/* Get env for os_execute (execv family of functions, as well as CreateProcess) */
/* Get env for os_execute */
static char **os_execute_env(int32_t argc, const Janet *argv) {
char **envp = NULL;
if (argc > 2) {
@@ -257,7 +235,10 @@ static Janet os_execute(int32_t argc, Janet *argv) {
janet_arity(argc, 1, 3);
/* Get flags */
int flags = os_execute_flags(argc, argv);
uint64_t flags = 0;
if (argc > 1) {
flags = janet_getflags(argv, 1, "ep");
}
/* Get environment */
char **envp = os_execute_env(argc, argv);
@@ -288,11 +269,11 @@ static Janet os_execute(int32_t argc, Janet *argv) {
char *empty_env[1] = {NULL};
char **envp1 = (NULL == envp) ? empty_env : envp;
if ((flags & JANET_OS_EFLAG_P) && (flags & JANET_OS_EFLAG_E)) {
if (janet_flag_at(flags, 1) && janet_flag_at(flags, 0)) {
status = (int) _spawnvpe(_P_WAIT, path, cargv, envp1);
} else if (flags & JANET_OS_EFLAG_P) {
} else if (janet_flag_at(flags, 1)) {
status = (int) _spawnvp(_P_WAIT, path, cargv);
} else if (flags & JANET_OS_EFLAG_E) {
} else if (janet_flag_at(flags, 0)) {
status = (int) _spawnve(_P_WAIT, path, cargv, envp1);
} else {
status = (int) _spawnv(_P_WAIT, path, cargv);
@@ -317,14 +298,14 @@ static Janet os_execute(int32_t argc, Janet *argv) {
/* Use posix_spawn to spawn new process */
pid_t pid;
if (flags & JANET_OS_EFLAG_P) {
if (janet_flag_at(flags, 1)) {
status = posix_spawnp(&pid,
child_argv[0], NULL, NULL, cargv,
(flags & JANET_OS_EFLAG_E) ? envp : environ);
janet_flag_at(flags, 0) ? envp : environ);
} else {
status = posix_spawn(&pid,
child_argv[0], NULL, NULL, cargv,
(flags & JANET_OS_EFLAG_E) ? envp : environ);
janet_flag_at(flags, 0) ? envp : environ);
}
/* Wait for child */

2
src/include/janet.h
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@@ -1270,6 +1270,8 @@ JANET_API Janet janet_getindex(Janet ds, int32_t index);
JANET_API int32_t janet_length(Janet x);
JANET_API void janet_put(Janet ds, Janet key, Janet value);
JANET_API void janet_putindex(Janet ds, int32_t index, Janet value);
JANET_API uint64_t janet_getflags(const Janet *argv, int32_t n, const char *flags);
#define janet_flag_at(F, I) ((F) & ((1ULL) << (I)))
/* VM functions */
JANET_API int janet_init(void);