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4223
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1 #include "text.h"
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2 #include "xmalloc.h"
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3
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4 #include <stddef.h>
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5
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6 enum {MAGIC = 42};
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7
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8 void text_on(struct text *p) {
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9 p->start = xmalloc(p->size = MAGIC, sizeof *p->start);
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10 p->start[p->length = 0] = NULL;
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11 }
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12
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13 void text_off(struct text *p) {
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14 while (p->length) {
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15 --p->length;
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16 op_end(p->start[p->length]);
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17 xfree(p->start[p->length]);
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18 }
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19 xfree(p->start);
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20 }
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21
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22 void text_1(struct text *p) {
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23 while (p->length >= p->size - 1) {
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24 p->start = xrealloc(p->start, p->size *= 2);
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25 }
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26 }
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27
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28 struct op *text_push(struct text *p, const struct op *src) {
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29 text_1(p);
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30 p->start[p->length] = xmalloc(1, sizeof *p->start[p->length]);
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31 *p->start[p->length++] = *src;
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32 p->start[p->length] = NULL;
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33 return p->start[p->length - 1];
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34 }
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