[8833] | 1 | /* Utility functions for scan-decls and fix-header programs. |
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| 2 | Copyright (C) 1993, 1994 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This program is free software; you can redistribute it and/or modify it |
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| 5 | under the terms of the GNU General Public License as published by the |
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| 6 | Free Software Foundation; either version 2, or (at your option) any |
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| 7 | later version. |
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| 8 | |
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| 9 | This program is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | GNU General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU General Public License |
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| 15 | along with this program; if not, write to the Free Software |
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| 16 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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| 17 | |
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| 18 | #include "scan.h" |
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| 19 | #include "hconfig.h" |
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| 20 | #include <ctype.h> |
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| 21 | |
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| 22 | int lineno = 1; |
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| 23 | int source_lineno = 1; |
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| 24 | sstring source_filename; |
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| 25 | |
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| 26 | void |
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| 27 | make_sstring_space (str, count) |
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| 28 | sstring *str; |
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| 29 | int count; |
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| 30 | { |
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| 31 | int cur_pos = str->ptr - str->base; |
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| 32 | int cur_size = str->limit - str->base; |
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| 33 | int new_size = cur_pos + count + 100; |
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| 34 | |
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| 35 | if (new_size <= cur_size) |
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| 36 | return; |
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| 37 | |
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| 38 | if (str->base == NULL) |
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| 39 | str->base = xmalloc (new_size); |
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| 40 | else |
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| 41 | str->base = xrealloc (str->base, new_size); |
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| 42 | str->ptr = str->base + cur_size; |
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| 43 | str->limit = str->base + new_size; |
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| 44 | } |
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| 45 | |
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| 46 | void |
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| 47 | sstring_append (dst, src) |
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| 48 | sstring *dst; |
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| 49 | sstring *src; |
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| 50 | { |
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| 51 | register char *d, *s; |
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| 52 | register count = SSTRING_LENGTH(src); |
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| 53 | MAKE_SSTRING_SPACE(dst, count + 1); |
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| 54 | d = dst->ptr; |
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| 55 | s = src->base; |
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| 56 | while (--count >= 0) *d++ = *s++; |
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| 57 | dst->ptr = d; |
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| 58 | *d = 0; |
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| 59 | } |
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| 60 | |
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| 61 | int |
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| 62 | scan_ident (fp, s, c) |
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| 63 | register FILE *fp; |
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| 64 | register sstring *s; |
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| 65 | int c; |
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| 66 | { |
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| 67 | s->ptr = s->base; |
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| 68 | if (isalpha(c) || c == '_') |
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| 69 | { |
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| 70 | for (;;) |
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| 71 | { |
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| 72 | SSTRING_PUT(s, c); |
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| 73 | c = getc (fp); |
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| 74 | if (c == EOF || !(isalnum(c) || c == '_')) |
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| 75 | break; |
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| 76 | } |
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| 77 | } |
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| 78 | MAKE_SSTRING_SPACE(s, 1); |
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| 79 | *s->ptr = 0; |
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| 80 | return c; |
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| 81 | } |
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| 82 | |
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| 83 | int |
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| 84 | scan_string (fp, s, init) |
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| 85 | register FILE *fp; |
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| 86 | register sstring *s; |
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| 87 | { |
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| 88 | int c; |
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| 89 | for (;;) |
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| 90 | { |
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| 91 | c = getc (fp); |
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| 92 | if (c == EOF || c == '\n') |
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| 93 | break; |
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| 94 | if (c == init) |
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| 95 | { |
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| 96 | c = getc (fp); |
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| 97 | break; |
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| 98 | } |
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| 99 | if (c == '\\') |
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| 100 | { |
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| 101 | c = getc (fp); |
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| 102 | if (c == EOF) |
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| 103 | break; |
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| 104 | if (c == '\n') |
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| 105 | continue; |
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| 106 | } |
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| 107 | SSTRING_PUT(s, c); |
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| 108 | } |
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| 109 | MAKE_SSTRING_SPACE(s, 1); |
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| 110 | *s->ptr = 0; |
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| 111 | return c; |
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| 112 | } |
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| 113 | |
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| 114 | /* Skip horizontal white spaces (spaces, tabs, and C-style comments). */ |
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| 115 | |
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| 116 | int |
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| 117 | skip_spaces (fp, c) |
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| 118 | register FILE *fp; |
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| 119 | int c; |
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| 120 | { |
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| 121 | for (;;) |
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| 122 | { |
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| 123 | if (c == ' ' || c == '\t') |
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| 124 | c = getc (fp); |
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| 125 | else if (c == '/') |
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| 126 | { |
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| 127 | c = getc (fp); |
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| 128 | if (c != '*') |
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| 129 | { |
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| 130 | ungetc (c, fp); |
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| 131 | return '/'; |
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| 132 | } |
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| 133 | c = getc (fp); |
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| 134 | for (;;) |
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| 135 | { |
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| 136 | if (c == EOF) |
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| 137 | return EOF; |
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| 138 | else if (c != '*') |
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| 139 | { |
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| 140 | if (c == '\n') |
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| 141 | source_lineno++, lineno++; |
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| 142 | c = getc (fp); |
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| 143 | } |
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| 144 | else if ((c = getc (fp)) == '/') |
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| 145 | return getc (fp); |
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| 146 | } |
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| 147 | } |
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| 148 | else |
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| 149 | break; |
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| 150 | } |
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| 151 | return c; |
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| 152 | } |
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| 153 | |
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| 154 | int |
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| 155 | read_upto (fp, str, delim) |
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| 156 | FILE *fp; |
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| 157 | sstring *str; |
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| 158 | int delim; |
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| 159 | { |
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| 160 | int ch; |
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| 161 | for (;;) |
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| 162 | { |
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| 163 | ch = getc (fp); |
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| 164 | if (ch == EOF || ch == delim) |
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| 165 | break; |
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| 166 | SSTRING_PUT(str, ch); |
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| 167 | } |
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| 168 | MAKE_SSTRING_SPACE(str, 1); |
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| 169 | *str->ptr = 0; |
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| 170 | return ch; |
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| 171 | } |
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| 172 | |
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| 173 | int |
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| 174 | get_token (fp, s) |
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| 175 | register FILE *fp; |
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| 176 | register sstring *s; |
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| 177 | { |
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| 178 | int c; |
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| 179 | s->ptr = s->base; |
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| 180 | retry: |
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| 181 | c = ' '; |
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| 182 | c = skip_spaces (fp, c); |
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| 183 | if (c == '\n') |
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| 184 | { |
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| 185 | source_lineno++; |
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| 186 | lineno++; |
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| 187 | goto retry; |
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| 188 | } |
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| 189 | if (c == '#') |
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| 190 | { |
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| 191 | c = get_token (fp, s); |
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| 192 | if (c == INT_TOKEN) |
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| 193 | { |
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| 194 | source_lineno = atoi (s->base) - 1; /* '\n' will add 1 */ |
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| 195 | get_token (fp, &source_filename); |
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| 196 | } |
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| 197 | for (;;) |
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| 198 | { |
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| 199 | c = getc (fp); |
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| 200 | if (c == EOF) |
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| 201 | return EOF; |
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| 202 | if (c == '\n') |
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| 203 | { |
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| 204 | source_lineno++; |
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| 205 | lineno++; |
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| 206 | goto retry; |
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| 207 | } |
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| 208 | } |
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| 209 | } |
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| 210 | if (c == EOF) |
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| 211 | return EOF; |
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| 212 | if (isdigit (c)) |
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| 213 | { |
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| 214 | do |
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| 215 | { |
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| 216 | SSTRING_PUT(s, c); |
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| 217 | c = getc (fp); |
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| 218 | } while (c != EOF && isdigit(c)); |
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| 219 | ungetc (c, fp); |
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| 220 | c = INT_TOKEN; |
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| 221 | goto done; |
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| 222 | } |
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| 223 | if (isalpha (c) || c == '_') |
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| 224 | { |
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| 225 | c = scan_ident (fp, s, c); |
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| 226 | ungetc (c, fp); |
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| 227 | return IDENTIFIER_TOKEN; |
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| 228 | } |
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| 229 | if (c == '\'' || c == '"') |
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| 230 | { |
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| 231 | c = scan_string (fp, s, c); |
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| 232 | ungetc (c, fp); |
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| 233 | return c == '\'' ? CHAR_TOKEN : STRING_TOKEN; |
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| 234 | } |
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| 235 | SSTRING_PUT(s, c); |
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| 236 | done: |
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| 237 | MAKE_SSTRING_SPACE(s, 1); |
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| 238 | *s->ptr = 0; |
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| 239 | return c; |
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| 240 | } |
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