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1.2 ! kristaps 1: /* $Id: tokens.c,v 1.1 2008/12/04 16:19:52 kristaps Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the
7: * above copyright notice and this permission notice appear in all
8: * copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11: * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12: * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
13: * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14: * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
15: * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
16: * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17: * PERFORMANCE OF THIS SOFTWARE.
18: */
19: #include <assert.h>
20: #include <stdlib.h>
21: #include <string.h>
22:
23: #include "libmdocml.h"
24: #include "private.h"
25:
26:
27: static int rofftok_dashes(const char *);
28: static int rofftok_special(const char *);
29: static int rofftok_predef(const char *);
30: static int rofftok_defined(const char *);
31:
32:
33: static int
34: rofftok_defined(const char *buf)
35: {
36: if (0 == *buf)
37: return(-1);
38: if (0 == *(buf + 1))
39: return(-1);
40: if (0 != *(buf + 2))
41: return(-1);
42:
43: if (0 == strcmp(buf, ">="))
44: return(ROFFTok_Ge);
45: else if (0 == strcmp(buf, "<="))
46: return(ROFFTok_Le);
47: else if (0 == strcmp(buf, "Rq"))
48: return(ROFFTok_Rquote);
49: else if (0 == strcmp(buf, "Lq"))
50: return(ROFFTok_Lquote);
51: else if (0 == strcmp(buf, "ua"))
52: return(ROFFTok_Uparrow);
53: else if (0 == strcmp(buf, "aa"))
54: return(ROFFTok_Acute);
55: else if (0 == strcmp(buf, "ga"))
56: return(ROFFTok_Grave);
57: else if (0 == strcmp(buf, "Pi"))
58: return(ROFFTok_Pi);
59: else if (0 == strcmp(buf, "Ne"))
60: return(ROFFTok_Ne);
61: else if (0 == strcmp(buf, "Le"))
62: return(ROFFTok_Le);
63: else if (0 == strcmp(buf, "Ge"))
64: return(ROFFTok_Ge);
65: else if (0 == strcmp(buf, "Lt"))
66: return(ROFFTok_Lt);
67: else if (0 == strcmp(buf, "Gt"))
68: return(ROFFTok_Gt);
69: else if (0 == strcmp(buf, "Pm"))
70: return(ROFFTok_Plusmin);
71: else if (0 == strcmp(buf, "If"))
72: return(ROFFTok_Infty);
73: else if (0 == strcmp(buf, "Na"))
74: return(ROFFTok_Nan);
75: else if (0 == strcmp(buf, "Ba"))
76: return(ROFFTok_Bar);
77:
78: return(-1);
79: }
80:
81:
82: static int
83: rofftok_predef(const char *buf)
84: {
85: if (0 == *buf)
86: return(-1);
87:
88: if ('(' == *buf)
89: return(rofftok_defined(++buf));
90:
1.2 ! kristaps 91: switch (*buf) {
! 92: case ('q'):
! 93: return(ROFFTok_Quote);
! 94: default:
! 95: break;
! 96: }
1.1 kristaps 97:
98: return(-1);
99: }
100:
101:
102: static int
103: rofftok_dashes(const char *buf)
104: {
105:
106: if (0 == *buf)
107: return(-1);
108: else if (*buf++ != 'e')
109: return(-1);
110:
111: if (0 == *buf)
112: return(-1);
113: else if (0 != *(buf + 1))
114: return(-1);
115:
116: switch (*buf) {
117: case ('m'):
118: return(ROFFTok_Em);
119: case ('n'):
120: return(ROFFTok_En);
121: default:
122: break;
123: }
124: return(-1);
125: }
126:
127:
128: static int
129: rofftok_special(const char *buf)
130: {
131:
132: if (0 == *buf)
133: return(-1);
134: else if (0 != *(buf + 1))
135: return(-1);
136:
137: switch (*buf) {
138: case ('a'):
139: return(ROFFTok_Sp_A);
140: case ('b'):
141: return(ROFFTok_Sp_B);
142: case ('f'):
143: return(ROFFTok_Sp_F);
144: case ('n'):
145: return(ROFFTok_Sp_N);
146: case ('r'):
147: return(ROFFTok_Sp_R);
148: case ('t'):
149: return(ROFFTok_Sp_T);
150: case ('v'):
151: return(ROFFTok_Sp_V);
152: default:
153: break;
154: }
155: return(-1);
156: }
157:
158:
159: int
160: rofftok_scan(const char *buf)
161: {
162:
163: assert(*buf);
164: if ('\\' != *buf++)
165: return(ROFFTok_MAX);
166:
167: for ( ; *buf; buf++) {
168: switch (*buf) {
169: case ('e'):
170: return(rofftok_special(++buf));
171: case ('('):
172: return(rofftok_dashes(++buf));
173: case (' '):
174: return(ROFFTok_Space);
175: case ('&'):
176: return(ROFFTok_Null);
177: case ('-'):
178: return(ROFFTok_Hyphen);
179: case ('*'):
180: return(rofftok_predef(++buf));
1.2 ! kristaps 181: case ('\\'):
! 182: return(ROFFTok_MAX);
1.1 kristaps 183: default:
184: break;
185: }
186: }
187:
188: return(-1);
189: }
190:
191: