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d6924eff RK |
1 | /* Utility functions for scan-decls and fix-header programs. |
2 | Copyright (C) 1993, 1994 Free Software Foundation, Inc. | |
7936052f PB |
3 | |
4 | This program is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU General Public License as published by the | |
6 | Free Software Foundation; either version 2, or (at your option) any | |
7 | later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, write to the Free Software | |
e9fa0c7c | 16 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
7936052f PB |
17 | |
18 | #include "scan.h" | |
7f77b42c | 19 | #include "hconfig.h" |
7936052f PB |
20 | #include <ctype.h> |
21 | ||
22 | int lineno = 1; | |
23 | int source_lineno = 1; | |
24 | sstring source_filename; | |
25 | ||
26 | void | |
27 | make_sstring_space (str, count) | |
28 | sstring *str; | |
29 | int count; | |
30 | { | |
31 | int cur_pos = str->ptr - str->base; | |
32 | int cur_size = str->limit - str->base; | |
33 | int new_size = cur_pos + count + 100; | |
34 | ||
35 | if (new_size <= cur_size) | |
36 | return; | |
37 | ||
38 | if (str->base == NULL) | |
39 | str->base = xmalloc (new_size); | |
40 | else | |
41 | str->base = xrealloc (str->base, new_size); | |
42 | str->ptr = str->base + cur_size; | |
43 | str->limit = str->base + new_size; | |
44 | } | |
45 | ||
46 | void | |
47 | sstring_append (dst, src) | |
48 | sstring *dst; | |
49 | sstring *src; | |
50 | { | |
51 | register char *d, *s; | |
52 | register count = SSTRING_LENGTH(src); | |
53 | MAKE_SSTRING_SPACE(dst, count + 1); | |
54 | d = dst->ptr; | |
55 | s = src->base; | |
56 | while (--count >= 0) *d++ = *s++; | |
57 | dst->ptr = d; | |
58 | *d = 0; | |
59 | } | |
60 | ||
7936052f PB |
61 | int |
62 | scan_ident (fp, s, c) | |
63 | register FILE *fp; | |
64 | register sstring *s; | |
65 | int c; | |
66 | { | |
67 | s->ptr = s->base; | |
68 | if (isalpha(c) || c == '_') | |
69 | { | |
70 | for (;;) | |
71 | { | |
72 | SSTRING_PUT(s, c); | |
73 | c = getc (fp); | |
74 | if (c == EOF || !(isalnum(c) || c == '_')) | |
75 | break; | |
76 | } | |
77 | } | |
78 | MAKE_SSTRING_SPACE(s, 1); | |
79 | *s->ptr = 0; | |
80 | return c; | |
81 | } | |
82 | ||
13ac10d7 RS |
83 | int |
84 | scan_string (fp, s, init) | |
7936052f PB |
85 | register FILE *fp; |
86 | register sstring *s; | |
87 | { | |
88 | int c; | |
89 | for (;;) | |
90 | { | |
91 | c = getc (fp); | |
92 | if (c == EOF || c == '\n') | |
93 | break; | |
94 | if (c == init) | |
95 | { | |
96 | c = getc (fp); | |
97 | break; | |
98 | } | |
99 | if (c == '\\') | |
100 | { | |
101 | c = getc (fp); | |
102 | if (c == EOF) | |
103 | break; | |
104 | if (c == '\n') | |
105 | continue; | |
106 | } | |
107 | SSTRING_PUT(s, c); | |
108 | } | |
109 | MAKE_SSTRING_SPACE(s, 1); | |
110 | *s->ptr = 0; | |
111 | return c; | |
112 | } | |
113 | ||
0f41302f | 114 | /* Skip horizontal white spaces (spaces, tabs, and C-style comments). */ |
7936052f | 115 | |
13ac10d7 RS |
116 | int |
117 | skip_spaces (fp, c) | |
7936052f PB |
118 | register FILE *fp; |
119 | int c; | |
120 | { | |
121 | for (;;) | |
122 | { | |
123 | if (c == ' ' || c == '\t') | |
124 | c = getc (fp); | |
125 | else if (c == '/') | |
126 | { | |
127 | c = getc (fp); | |
128 | if (c != '*') | |
129 | { | |
130 | ungetc (c, fp); | |
131 | return '/'; | |
132 | } | |
133 | c = getc (fp); | |
134 | for (;;) | |
135 | { | |
136 | if (c == EOF) | |
137 | return EOF; | |
138 | else if (c != '*') | |
139 | { | |
140 | if (c == '\n') | |
141 | source_lineno++, lineno++; | |
142 | c = getc (fp); | |
143 | } | |
144 | else if ((c = getc (fp)) == '/') | |
145 | return getc (fp); | |
146 | } | |
147 | } | |
148 | else | |
149 | break; | |
150 | } | |
151 | return c; | |
152 | } | |
153 | ||
154 | int | |
155 | read_upto (fp, str, delim) | |
156 | FILE *fp; | |
157 | sstring *str; | |
158 | int delim; | |
159 | { | |
160 | int ch; | |
161 | for (;;) | |
162 | { | |
163 | ch = getc (fp); | |
164 | if (ch == EOF || ch == delim) | |
165 | break; | |
166 | SSTRING_PUT(str, ch); | |
167 | } | |
168 | MAKE_SSTRING_SPACE(str, 1); | |
169 | *str->ptr = 0; | |
170 | return ch; | |
171 | } | |
172 | ||
173 | int | |
174 | get_token (fp, s) | |
175 | register FILE *fp; | |
176 | register sstring *s; | |
177 | { | |
178 | int c; | |
179 | s->ptr = s->base; | |
180 | retry: | |
181 | c = ' '; | |
7936052f PB |
182 | c = skip_spaces (fp, c); |
183 | if (c == '\n') | |
184 | { | |
185 | source_lineno++; | |
186 | lineno++; | |
187 | goto retry; | |
188 | } | |
189 | if (c == '#') | |
190 | { | |
191 | c = get_token (fp, s); | |
192 | if (c == INT_TOKEN) | |
193 | { | |
a6e8021e | 194 | source_lineno = atoi (s->base) - 1; /* '\n' will add 1 */ |
7936052f PB |
195 | get_token (fp, &source_filename); |
196 | } | |
197 | for (;;) | |
198 | { | |
199 | c = getc (fp); | |
200 | if (c == EOF) | |
201 | return EOF; | |
202 | if (c == '\n') | |
a6e8021e PB |
203 | { |
204 | source_lineno++; | |
205 | lineno++; | |
7936052f | 206 | goto retry; |
a6e8021e | 207 | } |
7936052f PB |
208 | } |
209 | } | |
210 | if (c == EOF) | |
211 | return EOF; | |
212 | if (isdigit (c)) | |
213 | { | |
214 | do | |
215 | { | |
216 | SSTRING_PUT(s, c); | |
217 | c = getc (fp); | |
218 | } while (c != EOF && isdigit(c)); | |
219 | ungetc (c, fp); | |
220 | c = INT_TOKEN; | |
221 | goto done; | |
222 | } | |
223 | if (isalpha (c) || c == '_') | |
224 | { | |
225 | c = scan_ident (fp, s, c); | |
226 | ungetc (c, fp); | |
227 | return IDENTIFIER_TOKEN; | |
228 | } | |
229 | if (c == '\'' || c == '"') | |
230 | { | |
7936052f PB |
231 | c = scan_string (fp, s, c); |
232 | ungetc (c, fp); | |
233 | return c == '\'' ? CHAR_TOKEN : STRING_TOKEN; | |
234 | } | |
235 | SSTRING_PUT(s, c); | |
236 | done: | |
237 | MAKE_SSTRING_SPACE(s, 1); | |
238 | *s->ptr = 0; | |
239 | return c; | |
240 | } |