mirror of
https://github.com/janet-lang/janet
synced 2024-06-18 11:19:56 +00:00
Update peg to allow functions over captures. Update C API
to make janet function calls easier and faster from C (still needs an object pool for fibers, though). Fix bug in scan-number and add many more peg tests.
This commit is contained in:
Calvin Rose
parent
83f4a11bf3
commit
798c88b4c8
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@ -118,6 +118,14 @@ int32_t janet_gethalfrange(const Janet *argv, int32_t n, int32_t length, const c
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return raw;
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}
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int32_t janet_getargindex(const Janet *argv, int32_t n, int32_t length, const char *which) {
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int32_t raw = janet_getinteger(argv, n);
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if (raw < 0) raw += length;
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if (raw < 0 || raw > length)
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janet_panicf("%s index %d out of range [0,%d)", which, raw, length);
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return raw;
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}
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JanetView janet_getindexed(const Janet *argv, int32_t n) {
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Janet x = argv[n];
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JanetView view;
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@ -485,7 +485,7 @@ static int macroexpand1(
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JanetFiber *fiberp;
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JanetFunction *macro = janet_unwrap_function(macroval);
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int lock = janet_gclock();
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JanetSignal status = janet_call(
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JanetSignal status = janet_pcall(
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macro,
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janet_tuple_length(form) - 1,
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form + 1,
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@ -1367,6 +1367,11 @@ value, one key will be ignored."
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(set current (macex1 current)))
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current)
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(defn pp
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"Pretty print to stdout."
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[x]
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(print (string/pretty x)))
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###
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###
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### Evaluation and Compilation
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@ -152,7 +152,7 @@ static Janet janet_core_is_abstract(int32_t argc, Janet *argv) {
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static Janet janet_core_scannumber(int32_t argc, Janet *argv) {
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double number;
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janet_fixarity(argc, 1);
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JanetByteView view = janet_getbytes(argv, 1);
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JanetByteView view = janet_getbytes(argv, 0);
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if (janet_scan_number(view.bytes, view.len, &number))
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return janet_wrap_nil();
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return janet_wrap_number(number);
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@ -26,7 +26,17 @@
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#include "gc.h"
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#include "util.h"
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static JanetFiber *make_fiber(int32_t capacity) {
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static void fiber_reset(JanetFiber *fiber) {
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fiber->maxstack = JANET_STACK_MAX;
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fiber->frame = 0;
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fiber->stackstart = JANET_FRAME_SIZE;
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fiber->stacktop = JANET_FRAME_SIZE;
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fiber->child = NULL;
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fiber->flags = JANET_FIBER_MASK_YIELD;
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janet_fiber_set_status(fiber, JANET_STATUS_NEW);
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}
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static JanetFiber *fiber_alloc(int32_t capacity) {
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Janet *data;
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JanetFiber *fiber = janet_gcalloc(JANET_MEMORY_FIBER, sizeof(JanetFiber));
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if (capacity < 32) {
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@ -38,37 +48,30 @@ static JanetFiber *make_fiber(int32_t capacity) {
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JANET_OUT_OF_MEMORY;
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}
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fiber->data = data;
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fiber->maxstack = JANET_STACK_MAX;
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fiber->frame = 0;
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fiber->stackstart = JANET_FRAME_SIZE;
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fiber->stacktop = JANET_FRAME_SIZE;
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fiber->child = NULL;
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fiber->flags = JANET_FIBER_MASK_YIELD;
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janet_fiber_set_status(fiber, JANET_STATUS_NEW);
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return fiber;
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}
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/* Initialize a new fiber */
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JanetFiber *janet_fiber(JanetFunction *callee, int32_t capacity) {
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JanetFiber *fiber = make_fiber(capacity);
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if (janet_fiber_funcframe(fiber, callee)) return NULL;
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return fiber;
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}
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/* Clear a fiber (reset it) with argn values on the stack. */
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JanetFiber *janet_fiber_n(JanetFunction *callee, int32_t capacity, const Janet *argv, int32_t argn) {
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/* Create a new fiber with argn values on the stack by reusing a fiber. */
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JanetFiber *janet_fiber_reset(JanetFiber *fiber, JanetFunction *callee, int32_t argc, const Janet *argv) {
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int32_t newstacktop;
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JanetFiber *fiber = make_fiber(capacity);
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newstacktop = fiber->stacktop + argn;
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if (newstacktop >= fiber->capacity) {
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janet_fiber_setcapacity(fiber, 2 * newstacktop);
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fiber_reset(fiber);
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if (argc) {
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newstacktop = fiber->stacktop + argc;
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if (newstacktop >= fiber->capacity) {
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janet_fiber_setcapacity(fiber, 2 * newstacktop);
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}
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memcpy(fiber->data + fiber->stacktop, argv, argc * sizeof(Janet));
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fiber->stacktop = newstacktop;
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}
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memcpy(fiber->data + fiber->stacktop, argv, argn * sizeof(Janet));
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fiber->stacktop = newstacktop;
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if (janet_fiber_funcframe(fiber, callee)) return NULL;
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return fiber;
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}
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/* Create a new fiber with argn values on the stack. */
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JanetFiber *janet_fiber(JanetFunction *callee, int32_t capacity, int32_t argc, const Janet *argv) {
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return janet_fiber_reset(fiber_alloc(capacity), callee, argc, argv);
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}
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/* Ensure that the fiber has enough extra capacity */
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void janet_fiber_setcapacity(JanetFiber *fiber, int32_t n) {
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Janet *newData = realloc(fiber->data, sizeof(Janet) * n);
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@ -302,7 +305,7 @@ static Janet cfun_new(int32_t argc, Janet *argv) {
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janet_panic("expected nullary function in fiber constructor");
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}
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}
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fiber = janet_fiber(func, 64);
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fiber = janet_fiber(func, 64, 0, NULL);
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if (argc == 2) {
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int32_t i;
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JanetByteView view = janet_getbytes(argv, 1);
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112
src/core/peg.c
112
src/core/peg.c
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@ -35,7 +35,6 @@
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/* Hold captured patterns and match state */
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typedef struct {
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int32_t depth;
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const uint8_t *text_start;
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const uint8_t *text_end;
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const uint8_t *subst_end;
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@ -44,12 +43,14 @@ typedef struct {
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JanetBuffer *scratch;
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const Janet *extrav;
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int32_t extrac;
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int flags;
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int32_t depth;
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enum {
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PEG_NORMAL,
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PEG_SUBSTITUTE,
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PEG_NOCAPTURE
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} mode;
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} State;
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/* Check if we are inside a substitution capture */
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#define PEG_SUBSTITUTE 1
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/* Forward declaration */
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static int32_t match(State *s, Janet peg, const uint8_t *text);
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@ -202,13 +203,13 @@ static int32_t match_between(State *s, int32_t argc, const Janet *argv, const ui
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*/
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static void push_capture(State *s, Janet capture, const uint8_t *text, int32_t nbytes) {
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if (s->flags & PEG_SUBSTITUTE) {
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if (s->mode == PEG_SUBSTITUTE) {
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/* Substitution mode, append as string to scratch buffer */
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/* But first append in-between text */
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janet_buffer_push_bytes(s->scratch, s->subst_end, text - s->subst_end);
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janet_to_string_b(s->scratch, capture);
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s->subst_end = text + nbytes;
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} else {
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} else if (s->mode == PEG_NORMAL) {
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/* Normal mode, append to captures */
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janet_array_push(s->captures, capture);
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}
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@ -217,7 +218,12 @@ static void push_capture(State *s, Janet capture, const uint8_t *text, int32_t n
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/* Capture a value */
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static int32_t match_capture(State *s, int32_t argc, const Janet *argv, const uint8_t *text) {
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janet_fixarity(argc, 1);
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int oldmode = s->mode;
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/* We can't have overlapping captures during substitution, so we can
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* turn off the child captures if subsituting */
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if (s->mode == PEG_SUBSTITUTE) s->mode = PEG_NOCAPTURE;
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int32_t result = match(s, argv[0], text);
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s->mode = oldmode;
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if (result < 0) return -1;
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push_capture(s, janet_stringv(text, result), text, result);
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return result;
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@ -235,21 +241,24 @@ static int32_t match_position(State *s, int32_t argc, const Janet *argv, const u
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static int32_t match_group(State *s, int32_t argc, const Janet *argv, const uint8_t *text) {
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janet_fixarity(argc, 1);
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int32_t old_count = s->captures->count;
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int32_t old_flags = s->flags;
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s->flags &= ~PEG_SUBSTITUTE; /* Turn off substitution mode */
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int oldmode = s->mode;
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if (oldmode != PEG_NOCAPTURE) s->mode = PEG_NORMAL;
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int32_t result = match(s, argv[0], text);
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s->flags = old_flags;
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s->mode = oldmode;
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if (result < 0) return -1;
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/* Collect sub-captures into an array by popping new values off of the capture stack,
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* and then putting them in a new array. Then, push the new array back onto the capture stack. */
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int32_t num_sub_captures = s->captures->count - old_count;
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JanetArray *sub_captures = janet_array(num_sub_captures);
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memcpy(sub_captures->data, s->captures->data + old_count, sizeof(Janet) * num_sub_captures);
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sub_captures->count = num_sub_captures;
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s->captures->count = old_count;
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if (oldmode != PEG_NOCAPTURE) {
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/* Collect sub-captures into an array by popping new values off of the capture stack,
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* and then putting them in a new array. Then, push the new array back onto the capture stack. */
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int32_t num_sub_captures = s->captures->count - old_count;
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JanetArray *sub_captures = janet_array(num_sub_captures);
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memcpy(sub_captures->data, s->captures->data + old_count, sizeof(Janet) * num_sub_captures);
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sub_captures->count = num_sub_captures;
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s->captures->count = old_count;
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push_capture(s, janet_wrap_array(sub_captures), text, result);
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}
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push_capture(s, janet_wrap_array(sub_captures), text, result);
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return result;
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}
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@ -263,7 +272,7 @@ static int32_t match_capture_constant(State *s, int32_t argc, const Janet *argv,
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/* Capture nth extra argument to peg/match */
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static int32_t match_capture_arg(State *s, int32_t argc, const Janet *argv, const uint8_t *text) {
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janet_fixarity(argc, 1);
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int32_t n = janet_gethalfrange(argv, 0, s->extrac, "n");
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int32_t n = janet_getargindex(argv, 0, s->extrac, "n");
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push_capture(s, s->extrav[n], text, 0);
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return 0;
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}
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@ -271,8 +280,16 @@ static int32_t match_capture_arg(State *s, int32_t argc, const Janet *argv, cons
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/* Capture replace */
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static int32_t match_replace(State *s, int32_t argc, const Janet *argv, const uint8_t *text) {
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janet_fixarity(argc, 2);
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int oldmode = s->mode;
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int32_t old_count = s->captures->count;
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if (oldmode == PEG_SUBSTITUTE) s->mode = PEG_NORMAL;
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int32_t result = match(s, argv[0], text);
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s->mode = oldmode;
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if (result < 0) return -1;
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if (oldmode == PEG_NOCAPTURE) return result;
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Janet capture;
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switch (janet_type(argv[1])) {
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default:
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@ -284,8 +301,28 @@ static int32_t match_replace(State *s, int32_t argc, const Janet *argv, const ui
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case JANET_TABLE:
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capture = janet_table_get(janet_unwrap_table(argv[1]), janet_stringv(text, result));
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break;
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/* TODO - add functions, c functions, numbers */
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case JANET_CFUNCTION:
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{
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janet_array_push(s->captures, janet_stringv(text, result));
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JanetCFunction cfunc = janet_unwrap_cfunction(argv[1]);
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capture = cfunc(s->captures->count - old_count, s->captures->data + old_count);
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break;
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}
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case JANET_FUNCTION:
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{
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janet_array_push(s->captures, janet_stringv(text, result));
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capture = janet_call(janet_unwrap_function(argv[1]),
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s->captures->count - old_count, s->captures->data + old_count);
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break;
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}
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case JANET_NUMBER:
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{
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int32_t index = janet_getargindex(argv, 1, s->captures->count, "capture");
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capture = s->captures->data[index];
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break;
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}
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}
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s->captures->count = old_count;
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push_capture(s, capture, text, result);
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return result;
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}
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@ -294,26 +331,32 @@ static int32_t match_replace(State *s, int32_t argc, const Janet *argv, const ui
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static int32_t match_substitute(State *s, int32_t argc, const Janet *argv, const uint8_t *text) {
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janet_fixarity(argc, 1);
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/* If we were originally in substitution mode, simply pass
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* argv[0] right through */
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if (s->flags & PEG_SUBSTITUTE)
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return match(s, argv[0], text);
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/* Save old scratch state */
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int32_t old_count = s->scratch->count;
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const uint8_t *old_subst_end = s->subst_end;
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/* Set up scratch */
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s->scratch->count = 0;
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/* Prepare for collecting in scratch */
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s->subst_end = text;
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s->flags |= PEG_SUBSTITUTE;
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int oldmode = s->mode;
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if (oldmode != PEG_NOCAPTURE) s->mode = PEG_SUBSTITUTE;
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int32_t result = match(s, argv[0], text);
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s->flags &= ~PEG_SUBSTITUTE;
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s->mode = oldmode;
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if (result < 0) return -1;
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/* Pop scratch to captures */
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janet_buffer_push_bytes(s->scratch, s->subst_end, text - s->subst_end + result);
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janet_array_push(s->captures, janet_stringv(s->scratch->data, s->scratch->count));
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s->scratch->count = 0;
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if (oldmode != PEG_NOCAPTURE) {
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/* Push remaining text to scratch buffer */
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janet_buffer_push_bytes(s->scratch, s->subst_end, text - s->subst_end + result);
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/* Pop last section of scratch buffer and push a string capture */
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janet_array_push(s->captures,
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janet_stringv(s->scratch->data + old_count, s->scratch->count - old_count));
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}
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/* Reset scratch buffer and subst_end */
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s->scratch->count = old_count;
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s->subst_end = old_subst_end;
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return result;
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}
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@ -391,7 +434,6 @@ static int32_t match(State *s, Janet peg, const uint8_t *text) {
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int32_t old_capture_count = s->captures->count;
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int32_t old_scratch_count = s->scratch->count;
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const uint8_t *old_subst_end = s->subst_end;
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int32_t result = mp->matcher(s, len - 1, items + 1, text);
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/* Reset old state on failure */
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@ -438,7 +480,7 @@ static Janet cfun_match(int32_t argc, Janet *argv) {
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s.extrac = 0;
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s.extrav = NULL;
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}
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s.flags = 0;
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s.mode = PEG_NORMAL;
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s.text_start = bytes.bytes;
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s.text_end = bytes.bytes + bytes.len;
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s.depth = JANET_RECURSION_GUARD;
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@ -99,7 +99,7 @@ int janet_dobytes(JanetTable *env, const uint8_t *bytes, int32_t len, const char
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JanetCompileResult cres = janet_compile(form, env, where);
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if (cres.status == JANET_COMPILE_OK) {
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JanetFunction *f = janet_thunk(cres.funcdef);
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JanetFiber *fiber = janet_fiber(f, 64);
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JanetFiber *fiber = janet_fiber(f, 64, 0, NULL);
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JanetSignal status = janet_continue(fiber, janet_wrap_nil(), &ret);
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if (status != JANET_SIGNAL_OK) {
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janet_stacktrace(fiber, "runtime", ret);
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@ -752,6 +752,24 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
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VM_END()
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}
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Janet janet_call(JanetFunction *fun, int32_t argc, const Janet *argv) {
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if (janet_vm_stackn >= JANET_RECURSION_GUARD)
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janet_panic("C stack recursed too deeply");
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JanetFiber *fiber = janet_fiber(fun, 64, argc, argv);
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if (!fiber)
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janet_panic("arity mismatch");
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int handle = janet_gclock();
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JanetFiber *old_fiber = janet_vm_fiber;
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janet_vm_fiber = fiber;
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memcpy(fiber->buf, janet_vm_fiber->buf, sizeof(jmp_buf));
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run_vm(fiber, janet_wrap_nil(), JANET_STATUS_NEW);
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janet_vm_fiber = old_fiber;
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janet_gcunlock(handle);
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return fiber->data[fiber->stacktop - 1];
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}
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/* Enter the main vm loop */
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JanetSignal janet_continue(JanetFiber *fiber, Janet in, Janet *out) {
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@ -782,11 +800,14 @@ JanetSignal janet_continue(JanetFiber *fiber, Janet in, Janet *out) {
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fiber->child = NULL;
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}
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/* Prepare state */
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janet_vm_stackn++;
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janet_gcroot(janet_wrap_fiber(fiber));
|
||||
/* Save global state */
|
||||
int32_t oldn = janet_vm_stackn++;
|
||||
int handle = janet_vm_gc_suspend;
|
||||
JanetFiber *old_vm_fiber = janet_vm_fiber;
|
||||
|
||||
/* Setup fiber */
|
||||
janet_vm_fiber = fiber;
|
||||
janet_gcroot(janet_wrap_fiber(fiber));
|
||||
janet_fiber_set_status(fiber, JANET_STATUS_ALIVE);
|
||||
|
||||
/* Run loop */
|
||||
|
|
@ -797,25 +818,28 @@ JanetSignal janet_continue(JanetFiber *fiber, Janet in, Janet *out) {
|
|||
signal = run_vm(fiber, in, old_status);
|
||||
}
|
||||
|
||||
/* Tear down */
|
||||
/* Tear down fiber */
|
||||
janet_fiber_set_status(fiber, signal);
|
||||
janet_vm_fiber = old_vm_fiber;
|
||||
janet_vm_stackn--;
|
||||
janet_gcunroot(janet_wrap_fiber(fiber));
|
||||
|
||||
/* Restore global state */
|
||||
janet_vm_gc_suspend = handle;
|
||||
janet_vm_fiber = old_vm_fiber;
|
||||
janet_vm_stackn = oldn;
|
||||
|
||||
/* Pop error or return value from fiber stack */
|
||||
*out = fiber->data[--fiber->stacktop];
|
||||
|
||||
return signal;
|
||||
}
|
||||
|
||||
JanetSignal janet_call(
|
||||
JanetSignal janet_pcall(
|
||||
JanetFunction *fun,
|
||||
int32_t argn,
|
||||
int32_t argc,
|
||||
const Janet *argv,
|
||||
Janet *out,
|
||||
JanetFiber **f) {
|
||||
JanetFiber *fiber = janet_fiber_n(fun, 64, argv, argn);
|
||||
JanetFiber *fiber = janet_fiber(fun, 64, argc, argv);
|
||||
if (f) *f = fiber;
|
||||
if (!fiber) {
|
||||
*out = janet_cstringv("arity mismatch");
|
||||
|
|
|
|||
|
|
@ -1042,8 +1042,8 @@ JANET_API void janet_table_merge_struct(JanetTable *table, const JanetKV *other)
|
|||
JANET_API JanetKV *janet_table_find(JanetTable *t, Janet key);
|
||||
|
||||
/* Fiber */
|
||||
JANET_API JanetFiber *janet_fiber(JanetFunction *callee, int32_t capacity);
|
||||
JANET_API JanetFiber *janet_fiber_n(JanetFunction *callee, int32_t capacity, const Janet *argv, int32_t argn);
|
||||
JANET_API JanetFiber *janet_fiber(JanetFunction *callee, int32_t capacity, int32_t argc, const Janet *argv);
|
||||
JANET_API JanetFiber *janet_fiber_reset(JanetFiber *fiber, JanetFunction *callee, int32_t argc, const Janet *argv);
|
||||
#define janet_fiber_status(f) (((f)->flags & JANET_FIBER_STATUS_MASK) >> JANET_FIBER_STATUS_OFFSET)
|
||||
|
||||
/* Treat similar types through uniform interfaces for iteration */
|
||||
|
|
@ -1112,7 +1112,8 @@ JANET_API void janet_inspect(Janet x);
|
|||
JANET_API int janet_init(void);
|
||||
JANET_API void janet_deinit(void);
|
||||
JANET_API JanetSignal janet_continue(JanetFiber *fiber, Janet in, Janet *out);
|
||||
JANET_API JanetSignal janet_call(JanetFunction *fun, int32_t argn, const Janet *argv, Janet *out, JanetFiber **f);
|
||||
JANET_API JanetSignal janet_pcall(JanetFunction *fun, int32_t argn, const Janet *argv, Janet *out, JanetFiber **f);
|
||||
JANET_API Janet janet_call(JanetFunction *fun, int32_t argc, const Janet *argv);
|
||||
JANET_API void janet_stacktrace(JanetFiber *fiber, const char *errtype, Janet err);
|
||||
|
||||
/* C Library helpers */
|
||||
|
|
@ -1163,6 +1164,7 @@ JANET_API JanetDictView janet_getdictionary(const Janet *argv, int32_t n);
|
|||
JANET_API void *janet_getabstract(const Janet *argv, int32_t n, const JanetAbstractType *at);
|
||||
JANET_API JanetRange janet_getslice(int32_t argc, const Janet *argv);
|
||||
JANET_API int32_t janet_gethalfrange(const Janet *argv, int32_t n, int32_t length, const char *which);
|
||||
JANET_API int32_t janet_getargindex(const Janet *argv, int32_t n, int32_t length, const char *which);
|
||||
|
||||
/***** END SECTION MAIN *****/
|
||||
|
||||
|
|
|
|||
|
|
@ -53,6 +53,12 @@
|
|||
|
||||
(assert (= var-b "hello") "regression 1")
|
||||
|
||||
# Scan number
|
||||
|
||||
(assert (= 1 (scan-number "1")) "scan-number 1")
|
||||
(assert (= -1 (scan-number "-1")) "scan-number -1")
|
||||
(assert (= 1.3e4 (scan-number "1.3e4")) "scan-number 1.3e4")
|
||||
|
||||
# Some macros
|
||||
|
||||
(assert (= 2 (if-not 1 3 2)) "if-not 1")
|
||||
|
|
@ -160,6 +166,11 @@
|
|||
(def result (peg/match pat text))
|
||||
(assert (= (not should-match) (not result)) text))
|
||||
|
||||
(defn check-deep
|
||||
[pat text what]
|
||||
(def result (peg/match pat text))
|
||||
(assert (deep= result what) text))
|
||||
|
||||
# Just numbers
|
||||
|
||||
(check-match '(* 4 -1) "abcd" true)
|
||||
|
|
@ -193,11 +204,42 @@
|
|||
(assert (= (string/replace-all "dog" "purple panda" text) (0 (peg/match grammar text))) text))
|
||||
|
||||
(try-grammar "i have a dog called doug the dog. he is good.")
|
||||
(try-grammar "i have a dog called doug the dog. he is good boy.")
|
||||
(try-grammar "i have a dog called doug the dog. he is a good boy.")
|
||||
(try-grammar "i have a dog called doug the do")
|
||||
(try-grammar "i have a dog called doug the dog")
|
||||
(try-grammar "i have a dog called doug the dogg")
|
||||
(try-grammar "i have a dog called doug the doggg")
|
||||
(try-grammar "i have a dog called doug the dogggg")
|
||||
|
||||
# Peg CSV test
|
||||
(def csv
|
||||
'{:field (+
|
||||
(* `"` (<-s (at-least 0 (+ (- 1 `"`) (/ `""` `"`)))) `"`)
|
||||
(<- (at-least 0 (- 1 (set ",\n")))))
|
||||
:main (* :field (at-least 0 (* "," :field)) (+ "\n" -1))})
|
||||
|
||||
(defn check-csv
|
||||
[str res]
|
||||
(check-deep csv str res))
|
||||
|
||||
(check-csv "1,2,3" @["1" "2" "3"])
|
||||
(check-csv "1,\"2\",3" @["1" "2" "3"])
|
||||
(check-csv ``1,"1""",3`` @["1" "1\"" "3"])
|
||||
|
||||
# Nested Captures
|
||||
|
||||
(def grmr '(<- (* (<- "a") (<- 1) (<- "c"))))
|
||||
(check-deep grmr "abc" @["a" "b" "c" "abc"])
|
||||
(check-deep grmr "acc" @["a" "c" "c" "acc"])
|
||||
|
||||
# Functions in grammar
|
||||
|
||||
(def grmr-triple ~(<-s (at-least 0 (/ 1 ,(fn [x] (string x x x))))))
|
||||
(check-deep grmr-triple "abc" @["aaabbbccc"])
|
||||
(check-deep grmr-triple "" @[""])
|
||||
(check-deep grmr-triple " " @[" "])
|
||||
|
||||
(def counter ~(/ (<-g (at-least 0 (<- 1))) ,length))
|
||||
(check-deep counter "abcdefg" @[7])
|
||||
|
||||
(end-suite)
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user