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	tsyn.c - neatvi - [fork] simple vi-type editor with UTF-8 support
	git clone git://src.adamsgaard.dk/neatvi
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	tsyn.c (2469B)
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	1 #include <stdio.h>
	2 #include <stdlib.h>
	3 #include <string.h>
	4 #include "vi.h"
	5
	6 #define NFTS 16
	7
	8 /* mapping filetypes to regular expression sets */
	9 static struct ftmap {
	10 char ft[32];
	11 struct rset *rs;
	12 } ftmap[NFTS];
	13
	14 static struct rset *syn_ftrs;
	15 static int syn_ctx;
	16
	17 static struct rset syn_find(char ft)
	18 {
	19 int i;
	20 for (i = 0; i < LEN(ftmap); i++)
	21 if (!strcmp(ft, ftmap[i].ft))
	22 return ftmap[i].rs;
	23 return NULL;
	24 }
	25
	26 int syn_merge(int old, int new)
	27 {
	28 int fg = SYN_FGSET(new) ? SYN_FG(new) : SYN_FG(old);
	29 int bg = SYN_BGSET(new) ? SYN_BG(new) : SYN_BG(old);
	30 return ((old \| new) & SYN_FLG) \| (bg << 8) \| fg;
	31 }
	32
	33 void syn_context(int att)
	34 {
	35 syn_ctx = att;
	36 }
	37
	38 int syn_highlight(char ft, char *s)
	39 {
	40 int subs[16 * 2];
	41 int n = uc_slen(s);
	42 int att = malloc(n sizeof(att[0]));
	43 int sidx = 0;
	44 struct rset *rs = syn_find(ft);
	45 int flg = 0;
	46 int hl, j, i;
	47 memset(att, 0, n * sizeof(att[0]));
	48 if (!rs)
	49 return att;
	50 while ((hl = rset_find(rs, s + sidx, LEN(subs) / 2, subs, flg)) …
	51 int grp = 0;
	52 int cend = 1;
	53 int *catt;
	54 conf_highlight(hl, NULL, &catt, NULL, &grp);
	55 for (i = 0; i < LEN(subs) / 2; i++) {
	56 if (subs[i * 2] >= 0) {
	57 int beg = uc_off(s, sidx + subs[i * 2 + …
	58 int end = uc_off(s, sidx + subs[i * 2 + …
	59 for (j = beg; j < end; j++)
	60 att[j] = syn_merge(att[j], catt[…
	61 if (i == grp)
	62 cend = MAX(cend, subs[i * 2 + 1]…
	63 }
	64 }
	65 sidx += cend;
	66 flg = RE_NOTBOL;
	67 }
	68 for (i = 0; i < n; i++)
	69 att[i] = syn_merge(att[i], syn_ctx);
	70 return att;
	71 }
	72
	73 static void syn_initft(char *name)
	74 {
	75 char *pats[128] = {NULL};
	76 char ft, pat;
	77 int i, n;
	78 for (i = 0; !conf_highlight(i, &ft, NULL, &pat, NULL) && i < LEN…
	79 if (!strcmp(ft, name))
	80 pats[i] = pat;
	81 n = i;
	82 for (i = 0; i < LEN(ftmap); i++) {
	83 if (!ftmap[i].ft[0]) {
	84 strcpy(ftmap[i].ft, name);
	85 ftmap[i].rs = rset_make(n, pats, 0);
	86 return;
	87 }
	88 }
	89 }
	90
	91 char syn_filetype(char path)
	92 {
	93 int hl = rset_find(syn_ftrs, path, 0, NULL, 0);
	94 char *ft;
	95 if (!conf_filetype(hl, &ft, NULL))
	96 return ft;
	97 return "";
	98 }
	99
	100 void syn_init(void)
	101 {
	102 char *pats[128] = {NULL};
	103 char pat, ft;
	104 int i;
	105 for (i = 0; !conf_highlight(i, &ft, NULL, NULL, NULL); i++)
	106 if (!syn_find(ft))
	107 syn_initft(ft);
	108 for (i = 0; !conf_filetype(i, NULL, &pat) && i < LEN(pats); i++)
	109 pats[i] = pat;
	110 syn_ftrs = rset_make(i, pats, 0);
	111 }
	112
	113 void syn_done(void)
	114 {
	115 int i;
	116 for (i = 0; i < LEN(ftmap); i++)
	117 if (ftmap[i].rs)
	118 rset_free(ftmap[i].rs);
	119 rset_free(syn_ftrs);
	120 }