Root/eeshow/kicad/lib-parse.c

1/*
2 * kicad/lib.c - Parse Eeschema .lib file
3 *
4 * Written 2016 by Werner Almesberger
5 * Copyright 2016 by Werner Almesberger
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13
14#include <stdlib.h>
15#include <stdio.h>
16#include <assert.h>
17
18#include "misc/util.h"
19#include "misc/diag.h"
20#include "gfx/text.h"
21#include "file/file.h"
22#include "kicad/lib.h"
23
24
25/* ----- Text -------------------------------------------------------------- */
26
27
28static enum text_style decode_style(const char *s)
29{
30    if (!strcmp(s, "Normal"))
31        return text_normal;
32    if (!strcmp(s, "Italic"))
33        return text_italic;
34    assert(0);
35}
36
37
38/* ----- Polygons ---------------------------------------------------------- */
39
40
41static bool parse_poly(struct lib_poly *poly, const char *line, int points)
42{
43    int i, n;
44
45    poly->points = points;
46    poly->x = alloc_type_n(int, points);
47    poly->y = alloc_type_n(int, points);
48    for (i = 0; i != points; i++) {
49        if (sscanf(line, "%d %d %n",
50            poly->x + i, poly->y + i, &n) != 2)
51            return 0;
52        line += n;
53    }
54    if (sscanf(line, "%c", &poly->fill) != 1)
55        return 0;
56    return 1;
57}
58
59
60/* ----- Definitions ------------------------------------------------------- */
61
62
63static bool parse_def(struct lib *lib, const char *line)
64{
65    char *s, *ref;
66    char draw_num, draw_name;
67    unsigned name_offset;
68    unsigned units;
69    bool power;
70
71    if (sscanf(line, "DEF %ms %ms %*d %u %c %c %u",
72        &s, &ref, &name_offset, &draw_num, &draw_name, &units) != 6)
73        return 0;
74
75    power = *ref == '#';
76    free(ref);
77
78    lib->curr_comp = alloc_type(struct comp);
79    if (*s == '~') {
80        char *tmp = alloc_size(strlen(s) + 1);
81
82        /* we can't just s++, since that would break freeing */
83        strcpy(tmp, s + 1);
84        free(s);
85        s = tmp;
86    }
87    lib->curr_comp->name = s;
88    lib->curr_comp->aliases = NULL;
89    lib->curr_comp->units = units;
90
91    lib->curr_comp->visible = 0;
92    lib->curr_comp->show_pin_name = draw_name == 'Y' && !power;
93    lib->curr_comp->show_pin_num = draw_num == 'Y' && !power;
94    lib->curr_comp->name_offset = name_offset;
95
96    lib->curr_comp->objs = NULL;
97    lib->next_obj = &lib->curr_comp->objs;
98
99    lib->curr_comp->next = NULL;
100    *lib->next_comp = lib->curr_comp;
101    lib->next_comp = &lib->curr_comp->next;
102
103    return 1;
104}
105
106
107/* ----- Arcs -------------------------------------------------------------- */
108
109
110static bool parse_arc(struct lib_obj *obj, const char *line)
111{
112    struct lib_arc *arc = &obj->u.arc;
113    int a1, a2;
114
115    if (sscanf(line, "A %d %d %d %d %d %u %u %u %c",
116        &arc->x, &arc->y, &arc->r, &a1, &a2, &obj->unit, &obj->convert,
117        &arc->thick, &arc->fill) != 9)
118        return 0;
119
120    /*
121     * KiCad arcs can be clockwise or counter-clockwise. They must always
122     * be smaller than 180 degrees.
123     */
124
125    while (a1 < 0)
126        a1 += 3600;
127    while (a2 < 0)
128        a2 += 3600;
129    a1 %= 3600;
130    a2 %= 3600;
131    if (a2 < a1)
132        a2 += 3600;
133    assert(a2 - a1 != 1800);
134    if (a2 - a1 > 1800)
135        swap(a1, a2);
136
137    arc->start_a = (a1 % 3600) / 10;
138    arc->end_a = (a2 % 3600) / 10;
139
140    return 1;
141}
142
143
144/* ----- Aliases ----------------------------------------------------------- */
145
146
147static void add_alias(struct comp *comp, const char *alias)
148{
149    struct comp_alias *new;
150
151    new = alloc_type(struct comp_alias);
152    new->name = alias;
153    new->next = comp->aliases;
154    comp->aliases = new;
155}
156
157
158/* ----- Library parser ---------------------------------------------------- */
159
160
161static bool lib_parse_line(const struct file *file,
162    void *user, const char *line)
163{
164    struct lib *lib = user;
165    int n = 0;
166    unsigned points;
167    struct lib_obj *obj;
168    char *s, *style;
169    unsigned zero1, zero2;
170    char vis;
171
172    switch (lib->state) {
173    case lib_skip:
174        if (parse_def(lib, line)) {
175            lib->state = lib_def;
176            return 1;
177        }
178        return 1;
179    case lib_def:
180        if (sscanf(line, "DRAW%n", &n) == 0 && n) {
181            lib->state = lib_draw;
182            return 1;
183        }
184        if (sscanf(line, "F%d \"\" %*d %*d %*d %*c %c", &n, &vis) == 2
185            || sscanf(line, "F%d \"%*[^\"]\" %*d %*d %*d %*c %c",
186            &n, &vis) == 2) {
187            if (vis == 'V')
188                lib->curr_comp->visible |= 1 << n;
189            return 1;
190        }
191        if (sscanf(line, "ALIAS %ms", &s) == 1) {
192            add_alias(lib->curr_comp, s);
193            return 1;
194        }
195        /* @@@ explicitly ignore FPLIST */
196        return 1;
197    case lib_draw:
198        if (sscanf(line, "ENDDRAW%n", &n) == 0 && n) {
199            lib->state = lib_skip;
200            return 1;
201        }
202
203        obj = alloc_type(struct lib_obj);
204        obj->next = NULL;
205        *lib->next_obj = obj;
206        lib->next_obj = &obj->next;
207
208        if (sscanf(line, "P %u %u %u %u %n",
209            &points, &obj->unit, &obj->convert, &obj->u.poly.thick,
210            &n) == 4) {
211            obj->type = lib_obj_poly;
212            if (parse_poly(&obj->u.poly, line + n, points))
213                return 1;
214            break;
215        }
216        if (sscanf(line, "S %d %d %d %d %u %u %d %c",
217            &obj->u.rect.sx, &obj->u.rect.sy, &obj->u.rect.ex,
218            &obj->u.rect.ey, &obj->unit, &obj->convert,
219            &obj->u.rect.thick, &obj->u.rect.fill) == 8) {
220            obj->type = lib_obj_rect;
221            return 1;
222        }
223        if (sscanf(line, "C %d %d %d %u %u %d %c",
224            &obj->u.circ.x, &obj->u.circ.y, &obj->u.circ.r,
225            &obj->unit, &obj->convert, &obj->u.circ.thick,
226            &obj->u.circ.fill) == 7) {
227            obj->type = lib_obj_circ;
228            return 1;
229        }
230        if (parse_arc(obj, line)) {
231            obj->type = lib_obj_arc;
232            return 1;
233        }
234        n = sscanf(line,
235            "T %d %d %d %d %u %u %u \"%m[^\"]\" %ms %u %c %c",
236            &obj->u.text.orient, &obj->u.text.x, &obj->u.text.y,
237            &obj->u.text.dim, &zero1, &obj->unit, &obj->convert,
238            &obj->u.text.s, &style, &zero2,
239            &obj->u.text.hor_align, &obj->u.text.vert_align);
240        if (n != 12) {
241            n = sscanf(line,
242                "T %d %d %d %d %u %u %u %ms %ms %u %c %c",
243                &obj->u.text.orient, &obj->u.text.x, &obj->u.text.y,
244                &obj->u.text.dim, &zero1, &obj->unit, &obj->convert,
245                &obj->u.text.s, &style, &zero2,
246                &obj->u.text.hor_align, &obj->u.text.vert_align);
247            while (n == 12) {
248                char *tilde;
249
250                tilde = strchr(obj->u.text.s, '~');
251                if (!tilde)
252                    break;
253                *tilde = ' ';
254            }
255        }
256        /*
257         * zero2 seems to be the font style: 0 = normal, 1 = bold ?
258         */
259        if (n == 12) {
260            if (zero1)
261                fatal("%u: only understand 0 x x\n"
262                    "\"%s\"\n", file->lineno, line);
263            obj->u.text.style = decode_style(style);
264            obj->type = lib_obj_text;
265            return 1;
266        }
267        if (sscanf(line, "X %ms %ms %d %d %d %c %d %d %u %u %c",
268            &obj->u.pin.name, &obj->u.pin.number,
269            &obj->u.pin.x, &obj->u.pin.y, &obj->u.pin.length,
270            &obj->u.pin.orient,
271            &obj->u.pin.number_size, &obj->u.pin.name_size,
272            &obj->unit, &obj->convert, &obj->u.pin.etype) == 11) {
273            obj->type = lib_obj_pin;
274            return 1;
275        }
276        break;
277    default:
278        abort();
279    }
280    fatal("%u: cannot parse\n\"%s\"\n", file->lineno, line);
281}
282
283
284bool lib_parse_file(struct lib *lib, struct file *file)
285{
286    lib->state = lib_skip;
287    return file_read(file, lib_parse_line, lib);
288}
289
290
291
292bool lib_parse(struct lib *lib, const char *name, const struct file *related)
293{
294    struct file file;
295    bool res;
296
297    if (!file_open(&file, name, related))
298        return 0;
299    res = lib_parse_file(lib, &file);
300    file_close(&file);
301    return res;
302}
303
304
305void lib_init(struct lib *lib)
306{
307    lib->comps = NULL;
308    lib->next_comp = &lib->comps;
309}
310
311
312static void free_objs(struct lib_obj *objs)
313{
314    struct lib_obj *next;
315
316    while (objs) {
317        next = objs->next;
318        switch (objs->type) {
319        case lib_obj_text:
320            free((char *) objs->u.text.s);
321            break;
322        case lib_obj_pin:
323            free((char *) objs->u.pin.name);
324            free((char *) objs->u.pin.number);
325            break;
326        default:
327            break;
328        }
329        free(objs);
330        objs = next;
331    }
332}
333
334
335static void free_comp(struct comp *comp)
336{
337    struct comp_alias *next;
338
339    free((char *) comp->name);
340    while (comp->aliases) {
341        next = comp->aliases->next;
342        free((char *) comp->aliases->name);
343        comp->aliases = next;
344    }
345    free_objs(comp->objs);
346    free(comp);
347}
348
349
350void lib_free(struct lib *lib)
351{
352    struct comp *comp, *next;
353
354    for (comp = lib->comps; comp; comp = next) {
355        next = comp->next;
356        free_comp(comp);
357    }
358}
359

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