780 lines
16 KiB
C
780 lines
16 KiB
C
/**
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* See Copyright Notice in picrin.h
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*/
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#include "picrin.h"
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#include "picrin/extra.h"
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#include "picrin/private/object.h"
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struct pic_chunk {
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char *str;
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int refcnt;
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size_t len;
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char buf[1];
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};
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struct pic_rope {
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int refcnt;
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size_t weight;
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struct pic_chunk *chunk;
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size_t offset;
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struct pic_rope *left, *right;
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};
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#define CHUNK_INCREF(c) do { \
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(c)->refcnt++; \
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} while (0)
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#define CHUNK_DECREF(c) do { \
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struct pic_chunk *c_ = (c); \
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if (! --c_->refcnt) { \
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pic_free(pic, c_); \
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} \
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} while (0)
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void
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pic_rope_incref(pic_state PIC_UNUSED(*pic), struct pic_rope *x) {
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x->refcnt++;
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}
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void
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pic_rope_decref(pic_state *pic, struct pic_rope *x) {
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if (! --x->refcnt) {
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if (x->chunk) {
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CHUNK_DECREF(x->chunk);
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pic_free(pic, x);
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return;
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}
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pic_rope_decref(pic, x->left);
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pic_rope_decref(pic, x->right);
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pic_free(pic, x);
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}
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}
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static struct pic_chunk *
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pic_make_chunk(pic_state *pic, const char *str, size_t len)
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{
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struct pic_chunk *c;
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c = pic_malloc(pic, offsetof(struct pic_chunk, buf) + len + 1);
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c->refcnt = 1;
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c->str = c->buf;
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c->len = len;
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c->buf[len] = 0;
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memcpy(c->buf, str, len);
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return c;
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}
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static struct pic_chunk *
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pic_make_chunk_lit(pic_state *pic, const char *str, size_t len)
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{
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struct pic_chunk *c;
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c = pic_malloc(pic, sizeof(struct pic_chunk));
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c->refcnt = 1;
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c->str = (char *)str;
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c->len = len;
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return c;
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}
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static struct pic_rope *
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pic_make_rope(pic_state *pic, struct pic_chunk *c)
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{
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struct pic_rope *x;
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x = pic_malloc(pic, sizeof(struct pic_rope));
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x->refcnt = 1;
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x->left = NULL;
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x->right = NULL;
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x->weight = c->len;
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x->offset = 0;
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x->chunk = c; /* delegate ownership */
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return x;
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}
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static pic_value
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pic_make_str(pic_state *pic, struct pic_rope *rope)
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{
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struct pic_string *str;
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str = (struct pic_string *)pic_obj_alloc(pic, sizeof(struct pic_string), PIC_TYPE_STRING);
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str->rope = rope; /* delegate ownership */
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return pic_obj_value(str);
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}
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static size_t
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rope_len(struct pic_rope *x)
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{
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return x->weight;
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}
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static char
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rope_at(struct pic_rope *x, size_t i)
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{
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while (i < x->weight) {
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if (x->chunk) {
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return x->chunk->str[x->offset + i];
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}
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if (i < x->left->weight) {
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x = x->left;
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} else {
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i -= x->left->weight;
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x = x->right;
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}
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}
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return -1;
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}
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static struct pic_rope *
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rope_cat(pic_state *pic, struct pic_rope *x, struct pic_rope *y)
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{
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struct pic_rope *z;
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z = pic_malloc(pic, sizeof(struct pic_rope));
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z->refcnt = 1;
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z->left = x;
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z->right = y;
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z->weight = x->weight + y->weight;
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z->offset = 0;
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z->chunk = NULL;
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pic_rope_incref(pic, x);
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pic_rope_incref(pic, y);
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return z;
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}
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static struct pic_rope *
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rope_sub(pic_state *pic, struct pic_rope *x, size_t i, size_t j)
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{
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assert(i <= j);
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assert(j <= x->weight);
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if (i == 0 && x->weight == j) {
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pic_rope_incref(pic, x);
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return x;
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}
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if (x->chunk) {
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struct pic_rope *y;
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y = pic_malloc(pic, sizeof(struct pic_rope));
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y->refcnt = 1;
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y->left = NULL;
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y->right = NULL;
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y->weight = j - i;
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y->offset = x->offset + i;
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y->chunk = x->chunk;
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CHUNK_INCREF(x->chunk);
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return y;
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}
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if (j <= x->left->weight) {
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return rope_sub(pic, x->left, i, j);
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}
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else if (x->left->weight <= i) {
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return rope_sub(pic, x->right, i - x->left->weight, j - x->left->weight);
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}
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else {
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struct pic_rope *r, *l;
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l = rope_sub(pic, x->left, i, x->left->weight);
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r = rope_sub(pic, x->right, 0, j - x->left->weight);
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x = rope_cat(pic, l, r);
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pic_rope_decref(pic, l);
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pic_rope_decref(pic, r);
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return x;
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}
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}
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static void
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flatten(pic_state *pic, struct pic_rope *x, struct pic_chunk *c, size_t offset)
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{
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if (x->chunk) {
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memcpy(c->str + offset, x->chunk->str + x->offset, x->weight);
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CHUNK_DECREF(x->chunk);
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x->chunk = c;
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x->offset = offset;
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CHUNK_INCREF(c);
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return;
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}
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flatten(pic, x->left, c, offset);
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flatten(pic, x->right, c, offset + x->left->weight);
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pic_rope_decref(pic, x->left);
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pic_rope_decref(pic, x->right);
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x->left = x->right = NULL;
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x->chunk = c;
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x->offset = offset;
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CHUNK_INCREF(c);
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}
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static const char *
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rope_cstr(pic_state *pic, struct pic_rope *x)
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{
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struct pic_chunk *c;
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if (x->chunk && x->offset == 0 && x->weight == x->chunk->len) {
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return x->chunk->str; /* reuse cached chunk */
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}
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c = pic_malloc(pic, offsetof(struct pic_chunk, buf) + x->weight + 1);
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c->refcnt = 1;
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c->len = x->weight;
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c->str = c->buf;
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c->str[c->len] = '\0';
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flatten(pic, x, c, 0);
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CHUNK_DECREF(c);
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return c->str;
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}
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static void
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str_update(pic_state *pic, pic_value dst, pic_value src)
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{
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pic_rope_incref(pic, pic_str_ptr(pic, src)->rope);
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pic_rope_decref(pic, pic_str_ptr(pic, dst)->rope);
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pic_str_ptr(pic, dst)->rope = pic_str_ptr(pic, src)->rope;
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}
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pic_value
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pic_str_value(pic_state *pic, const char *str, int len)
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{
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struct pic_chunk *c;
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if (len > 0) {
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c = pic_make_chunk(pic, str, len);
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} else {
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if (len == 0) {
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str = "";
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}
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c = pic_make_chunk_lit(pic, str, -len);
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}
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return pic_make_str(pic, pic_make_rope(pic, c));
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}
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int
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pic_str_len(pic_state PIC_UNUSED(*pic), pic_value str)
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{
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return rope_len(pic_str_ptr(pic, str)->rope);
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}
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char
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pic_str_ref(pic_state *pic, pic_value str, int i)
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{
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int c;
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c = rope_at(pic_str_ptr(pic, str)->rope, i);
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if (c == -1) {
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pic_errorf(pic, "index out of range %d", i);
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}
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return (char)c;
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}
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pic_value
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pic_str_cat(pic_state *pic, pic_value a, pic_value b)
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{
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return pic_make_str(pic, rope_cat(pic, pic_str_ptr(pic, a)->rope, pic_str_ptr(pic, b)->rope));
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}
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pic_value
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pic_str_sub(pic_state *pic, pic_value str, int s, int e)
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{
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return pic_make_str(pic, rope_sub(pic, pic_str_ptr(pic, str)->rope, s, e));
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}
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int
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pic_str_cmp(pic_state *pic, pic_value str1, pic_value str2)
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{
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return strcmp(pic_str(pic, str1), pic_str(pic, str2));
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}
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int
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pic_str_hash(pic_state *pic, pic_value str)
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{
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const char *s;
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int h = 0;
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s = pic_str(pic, str);
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while (*s) {
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h = (h << 5) - h + *s++;
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}
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return h;
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}
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const char *
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pic_str(pic_state *pic, pic_value str)
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{
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return rope_cstr(pic, pic_str_ptr(pic, str)->rope);
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}
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static void
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vfstrf(pic_state *pic, xFILE *file, const char *fmt, va_list ap)
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{
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char c;
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while ((c = *fmt++) != '\0') {
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switch (c) {
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default:
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xfputc(pic, c, file);
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break;
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case '%':
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c = *fmt++;
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if (! c)
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goto exit;
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switch (c) {
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default:
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xfputc(pic, c, file);
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break;
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case '%':
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xfputc(pic, '%', file);
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break;
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case 'c':
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xfprintf(pic, file, "%c", va_arg(ap, int));
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break;
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case 's':
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xfprintf(pic, file, "%s", va_arg(ap, const char *));
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break;
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case 'd':
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xfprintf(pic, file, "%d", va_arg(ap, int));
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break;
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case 'p':
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xfprintf(pic, file, "%p", va_arg(ap, void *));
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break;
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case 'f':
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xfprintf(pic, file, "%f", va_arg(ap, double));
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break;
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}
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break;
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case '~':
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c = *fmt++;
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if (! c)
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goto exit;
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switch (c) {
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default:
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xfputc(pic, c, file);
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break;
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case '~':
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xfputc(pic, '~', file);
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break;
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case '%':
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xfputc(pic, '\n', file);
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break;
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case 'a':
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pic_fdisplay(pic, va_arg(ap, pic_value), file);
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break;
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case 's':
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pic_fwrite(pic, va_arg(ap, pic_value), file);
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break;
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}
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break;
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}
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}
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exit:
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return;
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}
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pic_value
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pic_vstrf_value(pic_state *pic, const char *fmt, va_list ap)
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{
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pic_value str;
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xFILE *file;
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const char *buf;
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int len;
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file = xfopen_buf(pic, NULL, 0, "w");
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vfstrf(pic, file, fmt, ap);
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xfget_buf(pic, file, &buf, &len);
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str = pic_str_value(pic, buf, len);
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xfclose(pic, file);
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return str;
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}
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pic_value
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pic_strf_value(pic_state *pic, const char *fmt, ...)
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{
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va_list ap;
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pic_value str;
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va_start(ap, fmt);
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str = pic_vstrf_value(pic, fmt, ap);
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va_end(ap);
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return str;
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}
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static pic_value
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pic_str_string_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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return pic_bool_value(pic, pic_str_p(pic, v));
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}
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static pic_value
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pic_str_string(pic_state *pic)
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{
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int argc, i;
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pic_value *argv;
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char *buf;
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pic_get_args(pic, "*", &argc, &argv);
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buf = pic_alloca(pic, argc);
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for (i = 0; i < argc; ++i) {
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pic_assert_type(pic, argv[i], char);
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buf[i] = pic_char(pic, argv[i]);
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}
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return pic_str_value(pic, buf, argc);
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}
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static pic_value
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pic_str_make_string(pic_state *pic)
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{
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int len;
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char c = ' ';
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char *buf;
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pic_get_args(pic, "i|c", &len, &c);
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if (len < 0) {
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pic_errorf(pic, "make-string: negative length given %d", len);
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}
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buf = pic_alloca(pic, len);
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memset(buf, c, len);
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return pic_str_value(pic, buf, len);
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}
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static pic_value
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pic_str_string_length(pic_state *pic)
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{
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pic_value str;
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pic_get_args(pic, "s", &str);
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return pic_int_value(pic, pic_str_len(pic, str));
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}
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static pic_value
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pic_str_string_ref(pic_state *pic)
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{
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pic_value str;
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int k;
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pic_get_args(pic, "si", &str, &k);
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VALID_INDEX(pic, pic_str_len(pic, str), k);
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return pic_char_value(pic, pic_str_ref(pic, str, k));
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}
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static pic_value
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pic_str_string_set(pic_state *pic)
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{
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pic_value str, x, y, z;
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char c;
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int k, len;
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pic_get_args(pic, "sic", &str, &k, &c);
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len = pic_str_len(pic, str);
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VALID_INDEX(pic, len, k);
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x = pic_str_sub(pic, str, 0, k);
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y = pic_str_value(pic, &c, 1);
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z = pic_str_sub(pic, str, k + 1, len);
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str_update(pic, str, pic_str_cat(pic, x, pic_str_cat(pic, y, z)));
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return pic_undef_value(pic);
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}
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#define DEFINE_STRING_CMP(name, op) \
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static pic_value \
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pic_str_string_##name(pic_state *pic) \
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{ \
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int argc, i; \
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pic_value *argv; \
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\
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pic_get_args(pic, "*", &argc, &argv); \
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\
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if (argc < 1 || ! pic_str_p(pic, argv[0])) { \
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return pic_false_value(pic); \
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} \
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\
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for (i = 1; i < argc; ++i) { \
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if (! pic_str_p(pic, argv[i])) { \
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return pic_false_value(pic); \
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} \
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if (! (pic_str_cmp(pic, argv[i-1], argv[i]) op 0)) { \
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return pic_false_value(pic); \
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} \
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} \
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return pic_true_value(pic); \
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}
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DEFINE_STRING_CMP(eq, ==)
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DEFINE_STRING_CMP(lt, <)
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DEFINE_STRING_CMP(gt, >)
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DEFINE_STRING_CMP(le, <=)
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DEFINE_STRING_CMP(ge, >=)
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static pic_value
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pic_str_string_copy(pic_state *pic)
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{
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pic_value str;
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int n, start, end, len;
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n = pic_get_args(pic, "s|ii", &str, &start, &end);
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len = pic_str_len(pic, str);
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switch (n) {
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case 1:
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start = 0;
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case 2:
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end = len;
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}
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VALID_RANGE(pic, len, start, end);
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return pic_str_sub(pic, str, start, end);
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}
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static pic_value
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pic_str_string_copy_ip(pic_state *pic)
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{
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pic_value to, from, x, y, z;
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int n, at, start, end, tolen, fromlen;
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n = pic_get_args(pic, "sis|ii", &to, &at, &from, &start, &end);
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|
|
tolen = pic_str_len(pic, to);
|
|
fromlen = pic_str_len(pic, from);
|
|
|
|
switch (n) {
|
|
case 3:
|
|
start = 0;
|
|
case 4:
|
|
end = fromlen;
|
|
}
|
|
|
|
VALID_ATRANGE(pic, tolen, at, fromlen, start, end);
|
|
|
|
x = pic_str_sub(pic, to, 0, at);
|
|
y = pic_str_sub(pic, from, start, end);
|
|
z = pic_str_sub(pic, to, at + end - start, tolen);
|
|
|
|
str_update(pic, to, pic_str_cat(pic, x, pic_str_cat(pic, y, z)));
|
|
|
|
return pic_undef_value(pic);
|
|
}
|
|
|
|
static pic_value
|
|
pic_str_string_fill_ip(pic_state *pic)
|
|
{
|
|
pic_value str, x, y, z;
|
|
char c, *buf;
|
|
int n, start, end, len;
|
|
|
|
n = pic_get_args(pic, "sc|ii", &str, &c, &start, &end);
|
|
|
|
len = pic_str_len(pic, str);
|
|
|
|
switch (n) {
|
|
case 2:
|
|
start = 0;
|
|
case 3:
|
|
end = len;
|
|
}
|
|
|
|
VALID_RANGE(pic, len, start, end);
|
|
|
|
buf = pic_alloca(pic, end - start);
|
|
memset(buf, c, end - start);
|
|
|
|
x = pic_str_sub(pic, str, 0, start);
|
|
y = pic_str_value(pic, buf, end - start);
|
|
z = pic_str_sub(pic, str, end, len);
|
|
|
|
str_update(pic, str, pic_str_cat(pic, x, pic_str_cat(pic, y, z)));
|
|
|
|
return pic_undef_value(pic);
|
|
}
|
|
|
|
static pic_value
|
|
pic_str_string_append(pic_state *pic)
|
|
{
|
|
int argc, i;
|
|
pic_value *argv;
|
|
pic_value str = pic_lit_value(pic, "");
|
|
|
|
pic_get_args(pic, "*", &argc, &argv);
|
|
|
|
for (i = 0; i < argc; ++i) {
|
|
pic_assert_type(pic, argv[i], str);
|
|
str = pic_str_cat(pic, str, argv[i]);
|
|
}
|
|
return str;
|
|
}
|
|
|
|
static pic_value
|
|
pic_str_string_map(pic_state *pic)
|
|
{
|
|
pic_value proc, *argv, vals, val;
|
|
int argc, i, len, j;
|
|
char *buf;
|
|
|
|
pic_get_args(pic, "l*", &proc, &argc, &argv);
|
|
|
|
if (argc == 0) {
|
|
pic_errorf(pic, "string-map: one or more strings expected, but got zero");
|
|
}
|
|
|
|
len = INT_MAX;
|
|
for (i = 0; i < argc; ++i) {
|
|
int l;
|
|
pic_assert_type(pic, argv[i], str);
|
|
l = pic_str_len(pic, argv[i]);
|
|
len = len < l ? len : l;
|
|
}
|
|
|
|
buf = pic_alloca(pic, len);
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
vals = pic_nil_value(pic);
|
|
for (j = 0; j < argc; ++j) {
|
|
pic_push(pic, pic_char_value(pic, pic_str_ref(pic, argv[j], i)), vals);
|
|
}
|
|
vals = pic_reverse(pic, vals);
|
|
val = pic_funcall(pic, "picrin.base", "apply", 2, proc, vals);
|
|
|
|
pic_assert_type(pic, val, char);
|
|
|
|
buf[i] = pic_char(pic, val);
|
|
}
|
|
return pic_str_value(pic, buf, len);
|
|
}
|
|
|
|
static pic_value
|
|
pic_str_string_for_each(pic_state *pic)
|
|
{
|
|
pic_value proc, *argv, vals;
|
|
int argc, i, len, j;
|
|
|
|
pic_get_args(pic, "l*", &proc, &argc, &argv);
|
|
|
|
if (argc == 0) {
|
|
pic_errorf(pic, "string-map: one or more strings expected, but got zero");
|
|
}
|
|
|
|
len = INT_MAX;
|
|
for (i = 0; i < argc; ++i) {
|
|
int l;
|
|
pic_assert_type(pic, argv[i], str);
|
|
l = pic_str_len(pic, argv[i]);
|
|
len = len < l ? len : l;
|
|
}
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
vals = pic_nil_value(pic);
|
|
for (j = 0; j < argc; ++j) {
|
|
pic_push(pic, pic_char_value(pic, pic_str_ref(pic, argv[j], i)), vals);
|
|
}
|
|
vals = pic_reverse(pic, vals);
|
|
pic_funcall(pic, "picrin.base", "apply", 2, proc, vals);
|
|
}
|
|
return pic_undef_value(pic);
|
|
}
|
|
|
|
static pic_value
|
|
pic_str_list_to_string(pic_state *pic)
|
|
{
|
|
pic_value list, e, it;
|
|
int i;
|
|
char *buf;
|
|
|
|
pic_get_args(pic, "o", &list);
|
|
|
|
buf = pic_alloca(pic, pic_length(pic, list));
|
|
|
|
i = 0;
|
|
pic_for_each (e, list, it) {
|
|
pic_assert_type(pic, e, char);
|
|
|
|
buf[i++] = pic_char(pic, e);
|
|
}
|
|
|
|
return pic_str_value(pic, buf, i);
|
|
}
|
|
|
|
static pic_value
|
|
pic_str_string_to_list(pic_state *pic)
|
|
{
|
|
pic_value str, list;
|
|
int n, start, end, len, i;
|
|
|
|
n = pic_get_args(pic, "s|ii", &str, &start, &end);
|
|
|
|
len = pic_str_len(pic, str);
|
|
|
|
switch (n) {
|
|
case 1:
|
|
start = 0;
|
|
case 2:
|
|
end = len;
|
|
}
|
|
|
|
VALID_RANGE(pic, len, start, end);
|
|
|
|
list = pic_nil_value(pic);
|
|
for (i = start; i < end; ++i) {
|
|
pic_push(pic, pic_char_value(pic, pic_str_ref(pic, str, i)), list);
|
|
}
|
|
return pic_reverse(pic, list);
|
|
}
|
|
|
|
void
|
|
pic_init_str(pic_state *pic)
|
|
{
|
|
pic_defun(pic, "string?", pic_str_string_p);
|
|
pic_defun(pic, "string", pic_str_string);
|
|
pic_defun(pic, "make-string", pic_str_make_string);
|
|
pic_defun(pic, "string-length", pic_str_string_length);
|
|
pic_defun(pic, "string-ref", pic_str_string_ref);
|
|
pic_defun(pic, "string-set!", pic_str_string_set);
|
|
pic_defun(pic, "string-copy", pic_str_string_copy);
|
|
pic_defun(pic, "string-copy!", pic_str_string_copy_ip);
|
|
pic_defun(pic, "string-fill!", pic_str_string_fill_ip);
|
|
pic_defun(pic, "string-append", pic_str_string_append);
|
|
pic_defun(pic, "string-map", pic_str_string_map);
|
|
pic_defun(pic, "string-for-each", pic_str_string_for_each);
|
|
pic_defun(pic, "list->string", pic_str_list_to_string);
|
|
pic_defun(pic, "string->list", pic_str_string_to_list);
|
|
|
|
pic_defun(pic, "string=?", pic_str_string_eq);
|
|
pic_defun(pic, "string<?", pic_str_string_lt);
|
|
pic_defun(pic, "string>?", pic_str_string_gt);
|
|
pic_defun(pic, "string<=?", pic_str_string_le);
|
|
pic_defun(pic, "string>=?", pic_str_string_ge);
|
|
}
|