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annotate help2html/support.c @ 8:ec2b657edf13

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Add explicit lint-comment-style fallthrough annotations. GCC now assumes that if you don't have these you're making a mistake, which is annoying. XXX: This changeset updates the AG output files only (by hand) and is XXX: abusive - rebuilding them will erase the change. However, I need XXX: to get things to build before I can try to get AG to issue the XXX: annotations itself, so this seems like a reasonable expedient.
author David A. Holland
date Mon, 30 May 2022 23:51:43 -0400
parents 60d3ca9d3f6b
children
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1 #include <stdlib.h>
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2 #include <string.h>
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3 #include <assert.h>
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4 #include <err.h>
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5
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6 #include "must.h"
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7 #include "stringdict.h"
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8 #include "support.h"
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9
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10 ////////////////////////////////////////////////////////////
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11
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12 void intstack_init(struct intstack *is) {
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13 is->pos = 0;
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14 }
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15
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16 void intstack_push(struct intstack *is, int val) {
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17 if (is->pos >= INTSTACKSIZE) {
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18 errx(1, "Paragraph stack overflow - increase INTSTACKSIZE and recompile");
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19 }
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20 is->vals[is->pos++] = val;
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21 }
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22
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23 int intstack_pop(struct intstack *is) {
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24 assert(is->pos > 0);
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25 return is->vals[--is->pos];
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26 }
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27
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28 int intstack_top(const struct intstack *is) {
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29 assert(is->pos > 0);
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30 return is->vals[is->pos-1];
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31 }
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32
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33 ////////////////////////////////////////////////////////////
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34
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35 static const struct stringdict *sortdict;
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36 static int sorter(const void *av, const void *bv) {
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37 const char *as = stringdict_getbynum(sortdict, *(const unsigned *)av);
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38 const char *bs = stringdict_getbynum(sortdict, *(const unsigned *)bv);
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39 return strcmp(as, bs);
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40 }
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41
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42 struct permutation *mySort(const struct stringdict *sd) {
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43 sortdict = sd;
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44
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45 /* establish permutation vector */
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46 int i, n = stringdict_count(sortdict);
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47 int *pv = must_malloc(n*sizeof(int));
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48 for (i=0; i<n; i++) {
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49 pv[i] = i;
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50 }
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51
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52 /* sort it */
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53 qsort(pv, n, sizeof(int), sorter);
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54
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55 sortdict = NULL;
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56
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57 /* return it */
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58 struct permutation *p = must_malloc(sizeof(*p));
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59 p->v = pv;
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60 p->num = n;
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61 return p;
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62 }
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63
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64 void permutation_destroy(struct permutation *p) {
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65 free(p->v);
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66 free(p);
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67 }