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Change printf to add trailing newlines.

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Also add prinf and eprinf for old behavior. This
is consistent with the naming of print and prin.
This commit is contained in:
Calvin Rose 2019-12-02 04:45:03 -06:00
parent 779d788efa
commit e5fbe5c557
1 changed files with 25 additions and 5 deletions
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30
src/core/io.c
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@ -437,7 +437,7 @@ static Janet cfun_io_eprin(int32_t argc, Janet *argv) {
return cfun_io_print_impl(argc, argv, 0, "err", stderr);
}
static Janet cfun_io_printf_impl(int32_t argc, Janet *argv,
static Janet cfun_io_printf_impl(int32_t argc, Janet *argv, int newline,
const char *name, FILE *dflt_file) {
FILE *f;
janet_arity(argc, 1, -1);
@ -451,6 +451,7 @@ static Janet cfun_io_printf_impl(int32_t argc, Janet *argv,
/* Special case buffer */
JanetBuffer *buf = janet_unwrap_buffer(x);
janet_buffer_format(buf, fmt, 0, argc, argv);
if (newline) janet_buffer_push_u8(buf, '\n');
return janet_wrap_nil();
}
case JANET_NIL:
@ -467,6 +468,7 @@ static Janet cfun_io_printf_impl(int32_t argc, Janet *argv,
}
JanetBuffer *buf = janet_buffer(10);
janet_buffer_format(buf, fmt, 0, argc, argv);
if (newline) janet_buffer_push_u8(buf, '\n');
if (buf->count) {
if (1 != fwrite(buf->data, buf->count, 1, f)) {
janet_panicf("could not print %d bytes to file", buf->count, name);
@ -481,11 +483,19 @@ static Janet cfun_io_printf_impl(int32_t argc, Janet *argv,
}
static Janet cfun_io_printf(int32_t argc, Janet *argv) {
return cfun_io_printf_impl(argc, argv, "out", stdout);
return cfun_io_printf_impl(argc, argv, 1, "out", stdout);
}
static Janet cfun_io_prinf(int32_t argc, Janet *argv) {
return cfun_io_printf_impl(argc, argv, 0, "out", stdout);
}
static Janet cfun_io_eprintf(int32_t argc, Janet *argv) {
return cfun_io_printf_impl(argc, argv, "err", stderr);
return cfun_io_printf_impl(argc, argv, 1, "err", stderr);
}
static Janet cfun_io_eprinf(int32_t argc, Janet *argv) {
return cfun_io_printf_impl(argc, argv, 0, "err", stderr);
}
void janet_dynprintf(const char *name, FILE *dflt_file, const char *format, ...) {
@ -542,7 +552,12 @@ static const JanetReg io_cfuns[] = {
{
"printf", cfun_io_printf,
JDOC("(printf fmt & xs)\n\n"
"Prints output formatted as if with (string/format fmt ;xs) to (dyn :out stdout).")
"Prints output formatted as if with (string/format fmt ;xs) to (dyn :out stdout) with a trailing newline.")
},
{
"prinf", cfun_io_prinf,
JDOC("(prinf fmt & xs)\n\n"
"Like printf but with no trailing newline.")
},
{
"eprin", cfun_io_eprin,
@ -557,7 +572,12 @@ static const JanetReg io_cfuns[] = {
{
"eprintf", cfun_io_eprintf,
JDOC("(eprintf fmt & xs)\n\n"
"Prints output formatted as if with (string/format fmt ;xs) to (dyn :err stderr).")
"Prints output formatted as if with (string/format fmt ;xs) to (dyn :err stderr) with a trailing newline.")
},
{
"eprinf", cfun_io_eprinf,
JDOC("(eprinf fmt & xs)\n\n"
"Like eprintf but with no trailing newline.")
},
{
"file/open", cfun_io_fopen,