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mpc.c
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mpc.c
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#include "mpc.h"
/*
** State Type
*/
static mpc_state_t mpc_state_invalid(void) {
mpc_state_t s;
s.pos = -1;
s.row = -1;
s.col = -1;
s.term = 0;
return s;
}
static mpc_state_t mpc_state_new(void) {
mpc_state_t s;
s.pos = 0;
s.row = 0;
s.col = 0;
s.term = 0;
return s;
}
/*
** Input Type
*/
/*
** In mpc the input type has three modes of
** operation: String, File and Pipe.
**
** String is easy. The whole contents are
** loaded into a buffer and scanned through.
** The cursor can jump around at will making
** backtracking easy.
**
** The second is a File which is also somewhat
** easy. The contents are never loaded into
** memory but backtracking can still be achieved
** by seeking in the file at different positions.
**
** The final mode is Pipe. This is the difficult
** one. As we assume pipes cannot be seeked - and
** only support a single character lookahead at
** any point, when the input is marked for a
** potential backtracking we start buffering any
** input.
**
** This means that if we are requested to seek
** back we can simply start reading from the
** buffer instead of the input.
**
** Of course using `mpc_predictive` will disable
** backtracking and make LL(1) grammars easy
** to parse for all input methods.
**
*/
enum {
MPC_INPUT_STRING = 0,
MPC_INPUT_FILE = 1,
MPC_INPUT_PIPE = 2
};
enum {
MPC_INPUT_MARKS_MIN = 32
};
enum {
MPC_INPUT_MEM_NUM = 512
};
typedef struct {
char mem[64];
} mpc_mem_t;
typedef struct {
int type;
char *filename;
mpc_state_t state;
char *string;
char *buffer;
FILE *file;
int suppress;
int backtrack;
int marks_slots;
int marks_num;
mpc_state_t *marks;
char *lasts;
char last;
size_t mem_index;
char mem_full[MPC_INPUT_MEM_NUM];
mpc_mem_t mem[MPC_INPUT_MEM_NUM];
} mpc_input_t;
static mpc_input_t *mpc_input_new_string(const char *filename, const char *string) {
mpc_input_t *i = malloc(sizeof(mpc_input_t));
i->filename = malloc(strlen(filename) + 1);
strcpy(i->filename, filename);
i->type = MPC_INPUT_STRING;
i->state = mpc_state_new();
i->string = malloc(strlen(string) + 1);
strcpy(i->string, string);
i->buffer = NULL;
i->file = NULL;
i->suppress = 0;
i->backtrack = 1;
i->marks_num = 0;
i->marks_slots = MPC_INPUT_MARKS_MIN;
i->marks = malloc(sizeof(mpc_state_t) * i->marks_slots);
i->lasts = malloc(sizeof(char) * i->marks_slots);
i->last = '\0';
i->mem_index = 0;
memset(i->mem_full, 0, sizeof(char) * MPC_INPUT_MEM_NUM);
return i;
}
static mpc_input_t *mpc_input_new_nstring(const char *filename, const char *string, size_t length) {
mpc_input_t *i = malloc(sizeof(mpc_input_t));
i->filename = malloc(strlen(filename) + 1);
strcpy(i->filename, filename);
i->type = MPC_INPUT_STRING;
i->state = mpc_state_new();
i->string = malloc(length + 1);
strncpy(i->string, string, length);
i->string[length] = '\0';
i->buffer = NULL;
i->file = NULL;
i->suppress = 0;
i->backtrack = 1;
i->marks_num = 0;
i->marks_slots = MPC_INPUT_MARKS_MIN;
i->marks = malloc(sizeof(mpc_state_t) * i->marks_slots);
i->lasts = malloc(sizeof(char) * i->marks_slots);
i->last = '\0';
i->mem_index = 0;
memset(i->mem_full, 0, sizeof(char) * MPC_INPUT_MEM_NUM);
return i;
}
static mpc_input_t *mpc_input_new_pipe(const char *filename, FILE *pipe) {
mpc_input_t *i = malloc(sizeof(mpc_input_t));
i->filename = malloc(strlen(filename) + 1);
strcpy(i->filename, filename);
i->type = MPC_INPUT_PIPE;
i->state = mpc_state_new();
i->string = NULL;
i->buffer = NULL;
i->file = pipe;
i->suppress = 0;
i->backtrack = 1;
i->marks_num = 0;
i->marks_slots = MPC_INPUT_MARKS_MIN;
i->marks = malloc(sizeof(mpc_state_t) * i->marks_slots);
i->lasts = malloc(sizeof(char) * i->marks_slots);
i->last = '\0';
i->mem_index = 0;
memset(i->mem_full, 0, sizeof(char) * MPC_INPUT_MEM_NUM);
return i;
}
static mpc_input_t *mpc_input_new_file(const char *filename, FILE *file) {
mpc_input_t *i = malloc(sizeof(mpc_input_t));
i->filename = malloc(strlen(filename) + 1);
strcpy(i->filename, filename);
i->type = MPC_INPUT_FILE;
i->state = mpc_state_new();
i->string = NULL;
i->buffer = NULL;
i->file = file;
i->suppress = 0;
i->backtrack = 1;
i->marks_num = 0;
i->marks_slots = MPC_INPUT_MARKS_MIN;
i->marks = malloc(sizeof(mpc_state_t) * i->marks_slots);
i->lasts = malloc(sizeof(char) * i->marks_slots);
i->last = '\0';
i->mem_index = 0;
memset(i->mem_full, 0, sizeof(char) * MPC_INPUT_MEM_NUM);
return i;
}
static void mpc_input_delete(mpc_input_t *i) {
free(i->filename);
if (i->type == MPC_INPUT_STRING) { free(i->string); }
if (i->type == MPC_INPUT_PIPE) { free(i->buffer); }
free(i->marks);
free(i->lasts);
free(i);
}
static int mpc_mem_ptr(mpc_input_t *i, void *p) {
return
(char*)p >= (char*)(i->mem) &&
(char*)p < (char*)(i->mem) + (MPC_INPUT_MEM_NUM * sizeof(mpc_mem_t));
}
static void *mpc_malloc(mpc_input_t *i, size_t n) {
size_t j;
char *p;
if (n > sizeof(mpc_mem_t)) { return malloc(n); }
j = i->mem_index;
do {
if (!i->mem_full[i->mem_index]) {
p = (void*)(i->mem + i->mem_index);
i->mem_full[i->mem_index] = 1;
i->mem_index = (i->mem_index+1) % MPC_INPUT_MEM_NUM;
return p;
}
i->mem_index = (i->mem_index+1) % MPC_INPUT_MEM_NUM;
} while (j != i->mem_index);
return malloc(n);
}
static void *mpc_calloc(mpc_input_t *i, size_t n, size_t m) {
char *x = mpc_malloc(i, n * m);
memset(x, 0, n * m);
return x;
}
static void mpc_free(mpc_input_t *i, void *p) {
size_t j;
if (!mpc_mem_ptr(i, p)) { free(p); return; }
j = ((size_t)(((char*)p) - ((char*)i->mem))) / sizeof(mpc_mem_t);
i->mem_full[j] = 0;
}
static void *mpc_realloc(mpc_input_t *i, void *p, size_t n) {
char *q = NULL;
if (!mpc_mem_ptr(i, p)) { return realloc(p, n); }
if (n > sizeof(mpc_mem_t)) {
q = malloc(n);
memcpy(q, p, sizeof(mpc_mem_t));
mpc_free(i, p);
return q;
}
return p;
}
static void *mpc_export(mpc_input_t *i, void *p) {
char *q = NULL;
if (!mpc_mem_ptr(i, p)) { return p; }
q = malloc(sizeof(mpc_mem_t));
memcpy(q, p, sizeof(mpc_mem_t));
mpc_free(i, p);
return q;
}
static void mpc_input_backtrack_disable(mpc_input_t *i) { i->backtrack--; }
static void mpc_input_backtrack_enable(mpc_input_t *i) { i->backtrack++; }
static void mpc_input_suppress_disable(mpc_input_t *i) { i->suppress--; }
static void mpc_input_suppress_enable(mpc_input_t *i) { i->suppress++; }
static void mpc_input_mark(mpc_input_t *i) {
if (i->backtrack < 1) { return; }
i->marks_num++;
if (i->marks_num > i->marks_slots) {
i->marks_slots = i->marks_num + i->marks_num / 2;
i->marks = realloc(i->marks, sizeof(mpc_state_t) * i->marks_slots);
i->lasts = realloc(i->lasts, sizeof(char) * i->marks_slots);
}
i->marks[i->marks_num-1] = i->state;
i->lasts[i->marks_num-1] = i->last;
if (i->type == MPC_INPUT_PIPE && i->marks_num == 1) {
i->buffer = calloc(1, 1);
}
}
static void mpc_input_unmark(mpc_input_t *i) {
int j;
if (i->backtrack < 1) { return; }
i->marks_num--;
if (i->marks_slots > i->marks_num + i->marks_num / 2
&& i->marks_slots > MPC_INPUT_MARKS_MIN) {
i->marks_slots =
i->marks_num > MPC_INPUT_MARKS_MIN ?
i->marks_num : MPC_INPUT_MARKS_MIN;
i->marks = realloc(i->marks, sizeof(mpc_state_t) * i->marks_slots);
i->lasts = realloc(i->lasts, sizeof(char) * i->marks_slots);
}
if (i->type == MPC_INPUT_PIPE && i->marks_num == 0) {
for (j = strlen(i->buffer) - 1; j >= 0; j--)
ungetc(i->buffer[j], i->file);
free(i->buffer);
i->buffer = NULL;
}
}
static void mpc_input_rewind(mpc_input_t *i) {
if (i->backtrack < 1) { return; }
i->state = i->marks[i->marks_num-1];
i->last = i->lasts[i->marks_num-1];
if (i->type == MPC_INPUT_FILE) {
fseek(i->file, i->state.pos, SEEK_SET);
}
mpc_input_unmark(i);
}
static int mpc_input_buffer_in_range(mpc_input_t *i) {
return i->state.pos < (long)(strlen(i->buffer) + i->marks[0].pos);
}
static char mpc_input_buffer_get(mpc_input_t *i) {
return i->buffer[i->state.pos - i->marks[0].pos];
}
static char mpc_input_getc(mpc_input_t *i) {
char c = '\0';
switch (i->type) {
case MPC_INPUT_STRING: return i->string[i->state.pos];
case MPC_INPUT_FILE: c = fgetc(i->file); return c;
case MPC_INPUT_PIPE:
if (!i->buffer) { c = getc(i->file); return c; }
if (i->buffer && mpc_input_buffer_in_range(i)) {
c = mpc_input_buffer_get(i);
return c;
} else {
c = getc(i->file);
return c;
}
default: return c;
}
}
static char mpc_input_peekc(mpc_input_t *i) {
char c = '\0';
switch (i->type) {
case MPC_INPUT_STRING: return i->string[i->state.pos];
case MPC_INPUT_FILE:
c = fgetc(i->file);
if (feof(i->file)) { return '\0'; }
fseek(i->file, -1, SEEK_CUR);
return c;
case MPC_INPUT_PIPE:
if (!i->buffer) {
c = getc(i->file);
if (feof(i->file)) { return '\0'; }
ungetc(c, i->file);
return c;
}
if (i->buffer && mpc_input_buffer_in_range(i)) {
return mpc_input_buffer_get(i);
} else {
c = getc(i->file);
if (feof(i->file)) { return '\0'; }
ungetc(c, i->file);
return c;
}
default: return c;
}
}
static int mpc_input_terminated(mpc_input_t *i) {
return mpc_input_peekc(i) == '\0';
}
static int mpc_input_failure(mpc_input_t *i, char c) {
switch (i->type) {
case MPC_INPUT_STRING: { break; }
case MPC_INPUT_FILE: fseek(i->file, -1, SEEK_CUR); { break; }
case MPC_INPUT_PIPE: {
if (!i->buffer) { ungetc(c, i->file); break; }
if (i->buffer && mpc_input_buffer_in_range(i)) {
break;
} else {
ungetc(c, i->file);
}
}
default: { break; }
}
return 0;
}
static int mpc_input_success(mpc_input_t *i, char c, char **o) {
if (i->type == MPC_INPUT_PIPE
&& i->buffer && !mpc_input_buffer_in_range(i)) {
i->buffer = realloc(i->buffer, strlen(i->buffer) + 2);
i->buffer[strlen(i->buffer) + 1] = '\0';
i->buffer[strlen(i->buffer) + 0] = c;
}
i->last = c;
i->state.pos++;
i->state.col++;
if (c == '\n') {
i->state.col = 0;
i->state.row++;
}
if (o) {
(*o) = mpc_malloc(i, 2);
(*o)[0] = c;
(*o)[1] = '\0';
}
return 1;
}
static int mpc_input_any(mpc_input_t *i, char **o) {
char x;
if (mpc_input_terminated(i)) { return 0; }
x = mpc_input_getc(i);
return mpc_input_success(i, x, o);
}
static int mpc_input_char(mpc_input_t *i, char c, char **o) {
char x;
if (mpc_input_terminated(i)) { return 0; }
x = mpc_input_getc(i);
return x == c ? mpc_input_success(i, x, o) : mpc_input_failure(i, x);
}
static int mpc_input_range(mpc_input_t *i, char c, char d, char **o) {
char x;
if (mpc_input_terminated(i)) { return 0; }
x = mpc_input_getc(i);
return x >= c && x <= d ? mpc_input_success(i, x, o) : mpc_input_failure(i, x);
}
static int mpc_input_oneof(mpc_input_t *i, const char *c, char **o) {
char x;
if (mpc_input_terminated(i)) { return 0; }
x = mpc_input_getc(i);
return strchr(c, x) != 0 ? mpc_input_success(i, x, o) : mpc_input_failure(i, x);
}
static int mpc_input_noneof(mpc_input_t *i, const char *c, char **o) {
char x;
if (mpc_input_terminated(i)) { return 0; }
x = mpc_input_getc(i);
return strchr(c, x) == 0 ? mpc_input_success(i, x, o) : mpc_input_failure(i, x);
}
static int mpc_input_satisfy(mpc_input_t *i, int(*cond)(char), char **o) {
char x;
if (mpc_input_terminated(i)) { return 0; }
x = mpc_input_getc(i);
return cond(x) ? mpc_input_success(i, x, o) : mpc_input_failure(i, x);
}
static int mpc_input_string(mpc_input_t *i, const char *c, char **o) {
const char *x = c;
mpc_input_mark(i);
while (*x) {
if (!mpc_input_char(i, *x, NULL)) {
mpc_input_rewind(i);
return 0;
}
x++;
}
mpc_input_unmark(i);
*o = mpc_malloc(i, strlen(c) + 1);
strcpy(*o, c);
return 1;
}
static int mpc_input_anchor(mpc_input_t* i, int(*f)(char,char), char **o) {
*o = NULL;
return f(i->last, mpc_input_peekc(i));
}
static int mpc_input_soi(mpc_input_t* i, char **o) {
*o = NULL;
return i->last == '\0';
}
static int mpc_input_eoi(mpc_input_t* i, char **o) {
*o = NULL;
if (i->state.term) {
return 0;
} else if (mpc_input_terminated(i)) {
i->state.term = 1;
return 1;
} else {
return 0;
}
}
static mpc_state_t *mpc_input_state_copy(mpc_input_t *i) {
mpc_state_t *r = mpc_malloc(i, sizeof(mpc_state_t));
memcpy(r, &i->state, sizeof(mpc_state_t));
return r;
}
/*
** Error Type
*/
void mpc_err_delete(mpc_err_t *x) {
int i;
for (i = 0; i < x->expected_num; i++) { free(x->expected[i]); }
free(x->expected);
free(x->filename);
free(x->failure);
free(x);
}
void mpc_err_print(mpc_err_t *x) {
mpc_err_print_to(x, stdout);
}
void mpc_err_print_to(mpc_err_t *x, FILE *f) {
char *str = mpc_err_string(x);
fprintf(f, "%s", str);
free(str);
}
static void mpc_err_string_cat(char *buffer, int *pos, int *max, char const *fmt, ...) {
/* TODO: Error Checking on Length */
int left = ((*max) - (*pos));
va_list va;
va_start(va, fmt);
if (left < 0) { left = 0;}
(*pos) += vsprintf(buffer + (*pos), fmt, va);
va_end(va);
}
static const char *mpc_err_char_unescape(char c, char char_unescape_buffer[4]) {
char_unescape_buffer[0] = '\'';
char_unescape_buffer[1] = ' ';
char_unescape_buffer[2] = '\'';
char_unescape_buffer[3] = '\0';
switch (c) {
case '\a': return "bell";
case '\b': return "backspace";
case '\f': return "formfeed";
case '\r': return "carriage return";
case '\v': return "vertical tab";
case '\0': return "end of input";
case '\n': return "newline";
case '\t': return "tab";
case ' ' : return "space";
default:
char_unescape_buffer[1] = c;
return char_unescape_buffer;
}
}
char *mpc_err_string(mpc_err_t *x) {
int i;
int pos = 0;
int max = 1023;
char *buffer = calloc(1, 1024);
char char_unescape_buffer[4];
if (x->failure) {
mpc_err_string_cat(buffer, &pos, &max,
"%s: error: %s\n", x->filename, x->failure);
return buffer;
}
mpc_err_string_cat(buffer, &pos, &max,
"%s:%li:%li: error: expected ", x->filename, x->state.row+1, x->state.col+1);
if (x->expected_num == 0) { mpc_err_string_cat(buffer, &pos, &max, "ERROR: NOTHING EXPECTED"); }
if (x->expected_num == 1) { mpc_err_string_cat(buffer, &pos, &max, "%s", x->expected[0]); }
if (x->expected_num >= 2) {
for (i = 0; i < x->expected_num-2; i++) {
mpc_err_string_cat(buffer, &pos, &max, "%s, ", x->expected[i]);
}
mpc_err_string_cat(buffer, &pos, &max, "%s or %s",
x->expected[x->expected_num-2],
x->expected[x->expected_num-1]);
}
mpc_err_string_cat(buffer, &pos, &max, " at ");
mpc_err_string_cat(buffer, &pos, &max, mpc_err_char_unescape(x->received, char_unescape_buffer));
mpc_err_string_cat(buffer, &pos, &max, "\n");
return realloc(buffer, strlen(buffer) + 1);
}
static mpc_err_t *mpc_err_new(mpc_input_t *i, const char *expected) {
mpc_err_t *x;
if (i->suppress) { return NULL; }
x = mpc_malloc(i, sizeof(mpc_err_t));
x->filename = mpc_malloc(i, strlen(i->filename) + 1);
strcpy(x->filename, i->filename);
x->state = i->state;
x->expected_num = 1;
x->expected = mpc_malloc(i, sizeof(char*));
x->expected[0] = mpc_malloc(i, strlen(expected) + 1);
strcpy(x->expected[0], expected);
x->failure = NULL;
x->received = mpc_input_peekc(i);
return x;
}
static mpc_err_t *mpc_err_fail(mpc_input_t *i, const char *failure) {
mpc_err_t *x;
if (i->suppress) { return NULL; }
x = mpc_malloc(i, sizeof(mpc_err_t));
x->filename = mpc_malloc(i, strlen(i->filename) + 1);
strcpy(x->filename, i->filename);
x->state = i->state;
x->expected_num = 0;
x->expected = NULL;
x->failure = mpc_malloc(i, strlen(failure) + 1);
strcpy(x->failure, failure);
x->received = ' ';
return x;
}
static mpc_err_t *mpc_err_file(const char *filename, const char *failure) {
mpc_err_t *x;
x = malloc(sizeof(mpc_err_t));
x->filename = malloc(strlen(filename) + 1);
strcpy(x->filename, filename);
x->state = mpc_state_new();
x->expected_num = 0;
x->expected = NULL;
x->failure = malloc(strlen(failure) + 1);
strcpy(x->failure, failure);
x->received = ' ';
return x;
}
static void mpc_err_delete_internal(mpc_input_t *i, mpc_err_t *x) {
int j;
if (x == NULL) { return; }
for (j = 0; j < x->expected_num; j++) { mpc_free(i, x->expected[j]); }
mpc_free(i, x->expected);
mpc_free(i, x->filename);
mpc_free(i, x->failure);
mpc_free(i, x);
}
static mpc_err_t *mpc_err_export(mpc_input_t *i, mpc_err_t *x) {
int j;
for (j = 0; j < x->expected_num; j++) {
x->expected[j] = mpc_export(i, x->expected[j]);
}
x->expected = mpc_export(i, x->expected);
x->filename = mpc_export(i, x->filename);
x->failure = mpc_export(i, x->failure);
return mpc_export(i, x);
}
static int mpc_err_contains_expected(mpc_input_t *i, mpc_err_t *x, char *expected) {
int j;
(void)i;
for (j = 0; j < x->expected_num; j++) {
if (strcmp(x->expected[j], expected) == 0) { return 1; }
}
return 0;
}
static void mpc_err_add_expected(mpc_input_t *i, mpc_err_t *x, char *expected) {
(void)i;
x->expected_num++;
x->expected = mpc_realloc(i, x->expected, sizeof(char*) * x->expected_num);
x->expected[x->expected_num-1] = mpc_malloc(i, strlen(expected) + 1);
strcpy(x->expected[x->expected_num-1], expected);
}
static mpc_err_t *mpc_err_or(mpc_input_t *i, mpc_err_t** x, int n) {
int j, k, fst;
mpc_err_t *e;
fst = -1;
for (j = 0; j < n; j++) {
if (x[j] != NULL) { fst = j; }
}
if (fst == -1) { return NULL; }
e = mpc_malloc(i, sizeof(mpc_err_t));
e->state = mpc_state_invalid();
e->expected_num = 0;
e->expected = NULL;
e->failure = NULL;
e->filename = mpc_malloc(i, strlen(x[fst]->filename)+1);
strcpy(e->filename, x[fst]->filename);
for (j = 0; j < n; j++) {
if (x[j] == NULL) { continue; }
if (x[j]->state.pos > e->state.pos) { e->state = x[j]->state; }
}
for (j = 0; j < n; j++) {
if (x[j] == NULL) { continue; }
if (x[j]->state.pos < e->state.pos) { continue; }
if (x[j]->failure) {
e->failure = mpc_malloc(i, strlen(x[j]->failure)+1);
strcpy(e->failure, x[j]->failure);
break;
}
e->received = x[j]->received;
for (k = 0; k < x[j]->expected_num; k++) {
if (!mpc_err_contains_expected(i, e, x[j]->expected[k])) {
mpc_err_add_expected(i, e, x[j]->expected[k]);
}
}
}
for (j = 0; j < n; j++) {
if (x[j] == NULL) { continue; }
mpc_err_delete_internal(i, x[j]);
}
return e;
}
static mpc_err_t *mpc_err_repeat(mpc_input_t *i, mpc_err_t *x, const char *prefix) {
int j = 0;
size_t l = 0;
char *expect = NULL;
if (x == NULL) { return NULL; }
if (x->expected_num == 0) {
expect = mpc_calloc(i, 1, 1);
x->expected_num = 1;
x->expected = mpc_realloc(i, x->expected, sizeof(char*) * x->expected_num);
x->expected[0] = expect;
return x;
}
else if (x->expected_num == 1) {
expect = mpc_malloc(i, strlen(prefix) + strlen(x->expected[0]) + 1);
strcpy(expect, prefix);
strcat(expect, x->expected[0]);
mpc_free(i, x->expected[0]);
x->expected[0] = expect;
return x;
}
else if (x->expected_num > 1) {
l += strlen(prefix);
for (j = 0; j < x->expected_num-2; j++) {
l += strlen(x->expected[j]) + strlen(", ");
}
l += strlen(x->expected[x->expected_num-2]);
l += strlen(" or ");
l += strlen(x->expected[x->expected_num-1]);
expect = mpc_malloc(i, l + 1);
strcpy(expect, prefix);
for (j = 0; j < x->expected_num-2; j++) {
strcat(expect, x->expected[j]); strcat(expect, ", ");
}
strcat(expect, x->expected[x->expected_num-2]);
strcat(expect, " or ");
strcat(expect, x->expected[x->expected_num-1]);
for (j = 0; j < x->expected_num; j++) { mpc_free(i, x->expected[j]); }
x->expected_num = 1;
x->expected = mpc_realloc(i, x->expected, sizeof(char*) * x->expected_num);
x->expected[0] = expect;
return x;
}
return NULL;
}
static mpc_err_t *mpc_err_many1(mpc_input_t *i, mpc_err_t *x) {
return mpc_err_repeat(i, x, "one or more of ");
}
static mpc_err_t *mpc_err_count(mpc_input_t *i, mpc_err_t *x, int n) {
mpc_err_t *y;
int digits = n/10 + 1;
char *prefix;
prefix = mpc_malloc(i, digits + strlen(" of ") + 1);
if (!prefix) {
return NULL;
}
sprintf(prefix, "%i of ", n);
y = mpc_err_repeat(i, x, prefix);
mpc_free(i, prefix);
return y;
}
static mpc_err_t *mpc_err_merge(mpc_input_t *i, mpc_err_t *x, mpc_err_t *y) {
mpc_err_t *errs[2];
errs[0] = x;
errs[1] = y;
return mpc_err_or(i, errs, 2);
}
/*
** Parser Type
*/
enum {
MPC_TYPE_UNDEFINED = 0,
MPC_TYPE_PASS = 1,
MPC_TYPE_FAIL = 2,
MPC_TYPE_LIFT = 3,
MPC_TYPE_LIFT_VAL = 4,
MPC_TYPE_EXPECT = 5,
MPC_TYPE_ANCHOR = 6,
MPC_TYPE_STATE = 7,
MPC_TYPE_ANY = 8,
MPC_TYPE_SINGLE = 9,
MPC_TYPE_ONEOF = 10,
MPC_TYPE_NONEOF = 11,
MPC_TYPE_RANGE = 12,
MPC_TYPE_SATISFY = 13,
MPC_TYPE_STRING = 14,
MPC_TYPE_APPLY = 15,
MPC_TYPE_APPLY_TO = 16,
MPC_TYPE_PREDICT = 17,
MPC_TYPE_NOT = 18,
MPC_TYPE_MAYBE = 19,
MPC_TYPE_MANY = 20,
MPC_TYPE_MANY1 = 21,
MPC_TYPE_COUNT = 22,
MPC_TYPE_OR = 23,
MPC_TYPE_AND = 24,
MPC_TYPE_CHECK = 25,
MPC_TYPE_CHECK_WITH = 26,
MPC_TYPE_SOI = 27,
MPC_TYPE_EOI = 28,
MPC_TYPE_SEPBY1 = 29
};
typedef struct { char *m; } mpc_pdata_fail_t;
typedef struct { mpc_ctor_t lf; void *x; } mpc_pdata_lift_t;
typedef struct { mpc_parser_t *x; char *m; } mpc_pdata_expect_t;
typedef struct { int(*f)(char,char); } mpc_pdata_anchor_t;
typedef struct { char x; } mpc_pdata_single_t;
typedef struct { char x; char y; } mpc_pdata_range_t;
typedef struct { int(*f)(char); } mpc_pdata_satisfy_t;
typedef struct { char *x; } mpc_pdata_string_t;
typedef struct { mpc_parser_t *x; mpc_apply_t f; } mpc_pdata_apply_t;
typedef struct { mpc_parser_t *x; mpc_apply_to_t f; void *d; } mpc_pdata_apply_to_t;
typedef struct { mpc_parser_t *x; mpc_dtor_t dx; mpc_check_t f; char *e; } mpc_pdata_check_t;
typedef struct { mpc_parser_t *x; mpc_dtor_t dx; mpc_check_with_t f; void *d; char *e; } mpc_pdata_check_with_t;
typedef struct { mpc_parser_t *x; } mpc_pdata_predict_t;
typedef struct { mpc_parser_t *x; mpc_dtor_t dx; mpc_ctor_t lf; } mpc_pdata_not_t;
typedef struct { int n; mpc_fold_t f; mpc_parser_t *x; mpc_dtor_t dx; } mpc_pdata_repeat_t;
typedef struct { int n; mpc_parser_t **xs; } mpc_pdata_or_t;
typedef struct { int n; mpc_fold_t f; mpc_parser_t **xs; mpc_dtor_t *dxs; } mpc_pdata_and_t;
typedef struct { int n; mpc_fold_t f; mpc_parser_t *x; mpc_parser_t *sep; } mpc_pdata_sepby1;
typedef union {
mpc_pdata_fail_t fail;
mpc_pdata_lift_t lift;
mpc_pdata_expect_t expect;
mpc_pdata_anchor_t anchor;
mpc_pdata_single_t single;
mpc_pdata_range_t range;
mpc_pdata_satisfy_t satisfy;
mpc_pdata_string_t string;
mpc_pdata_apply_t apply;
mpc_pdata_apply_to_t apply_to;
mpc_pdata_check_t check;
mpc_pdata_check_with_t check_with;
mpc_pdata_predict_t predict;
mpc_pdata_not_t not;
mpc_pdata_repeat_t repeat;
mpc_pdata_and_t and;
mpc_pdata_or_t or;
mpc_pdata_sepby1 sepby1;
} mpc_pdata_t;
struct mpc_parser_t {
char *name;
mpc_pdata_t data;
char type;
char retained;
};
static mpc_val_t *mpcf_input_nth_free(mpc_input_t *i, int n, mpc_val_t **xs, int x) {
int j;
for (j = 0; j < n; j++) { if (j != x) { mpc_free(i, xs[j]); } }
return xs[x];
}
static mpc_val_t *mpcf_input_fst_free(mpc_input_t *i, int n, mpc_val_t **xs) { return mpcf_input_nth_free(i, n, xs, 0); }
static mpc_val_t *mpcf_input_snd_free(mpc_input_t *i, int n, mpc_val_t **xs) { return mpcf_input_nth_free(i, n, xs, 1); }
static mpc_val_t *mpcf_input_trd_free(mpc_input_t *i, int n, mpc_val_t **xs) { return mpcf_input_nth_free(i, n, xs, 2); }
static mpc_val_t *mpcf_input_strfold(mpc_input_t *i, int n, mpc_val_t **xs) {
int j;
size_t l = 0;
if (n == 0) { return mpc_calloc(i, 1, 1); }
for (j = 0; j < n; j++) { l += strlen(xs[j]); }
xs[0] = mpc_realloc(i, xs[0], l + 1);
for (j = 1; j < n; j++) { strcat(xs[0], xs[j]); mpc_free(i, xs[j]); }
return xs[0];
}
static mpc_val_t *mpcf_input_state_ast(mpc_input_t *i, int n, mpc_val_t **xs) {
mpc_state_t *s = ((mpc_state_t**)xs)[0];
mpc_ast_t *a = ((mpc_ast_t**)xs)[1];
a = mpc_ast_state(a, *s);
mpc_free(i, s);
(void) n;
return a;
}
static mpc_val_t *mpc_parse_fold(mpc_input_t *i, mpc_fold_t f, int n, mpc_val_t **xs) {