emit.c
1 //! @file emit.c
2 //! @author J. Marcel van der Veer
3 //
4 //! @section Copyright
5 //
6 // This file is part of VIF - vintage FORTRAN compiler.
7 // Copyright 2020-2025 J. Marcel van der Veer <algol68g@xs4all.nl>.
8 //
9 //! @section License
10 //
11 // This program is free software; you can redistribute it and/or modify it
12 // under the terms of the GNU General Public License as published by the
13 // Free Software Foundation; either version 3 of the License, or
14 // (at your option) any later version.
15 //
16 // This program is distributed in the hope that it will be useful, but
17 // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 // more details. You should have received a copy of the GNU General Public
20 // License along with this program. If not, see <http://www.gnu.org/licenses/>.
21
22 //! @section Synopsis
23 //!
24 //! Emit C object code.
25
26 #include <vif.h>
27
28 //
29 // Write intermediate code
30 //
31
32 char *newpage (char *module, char *section)
33 {
34 NEW_RECORD (str);
35 _srecordf (str, "\f %s %s", module, section);
36 return f_stralloc (str);
37 }
38
39 logical_4 no_comment (char *str)
40 {
41 if (strncmp (str, "//", 2) == 0) {
42 return FALSE;
43 }
44 if (strncmp (str, "#", 1) == 0) {
45 return FALSE;
46 }
47 return TRUE;
48 }
49
50 void newline (FILE * obj, char *info, int_4 phase, int_4 force)
51 {
52 if (page == 0 || (info != NULL && info[0] == '\f')) {
53 sscanf (&info[1], "%s %s", hmodule, hsection);
54 }
55 if (force || line >= LINES_PER_PAGE) {
56 NEW_RECORD (str);
57 page++;
58 _srecordf (str, "// %s %16s ** %-28s ** %-48s PAGE %05d", _strupper (PACKAGE), _strupper (hdate), _strupper (hmodule), _strupper (hsection), page);
59 for (int_4 k = 0; k < (int_4) strlen (str); k++) {
60 if (str[k] == '-') {
61 str[k] = ' ';
62 }
63 }
64 if (page == 1) {
65 fprintf (obj, "%s\n\n", str);
66 line = 1;
67 } else {
68 fprintf (obj, "\f\n%s\n\n", str);
69 line = 1;
70 }
71 if (phase == JCL) {
72 fprintf (obj, "\n// Line JCL *...*....1....|....2....|....3....|....4....|....5....|....6....|....7..*.|....8\n");
73 line += 2;
74 }
75 if (phase == LIST) {
76 fprintf (obj, "\n// Line ISN *...*....1....|....2....|....3....|....4....|....5....|....6....|....7..*.|....8\n");
77 line += 2;
78 }
79 } else {
80 fprintf (obj, "\n");
81 line++;
82 }
83 }
84
85 void indentation (FILE *obj, int_4 ind) {
86 for (int_4 k = 1; k <= ind; k++) {
87 fprintf (obj, " ");
88 }
89 }
90
91 void emit_code (FILE * obj, int_4 proc)
92 {
93 // Write the procedure 'proc'.
94 int_4 nl = FALSE, printed = 0;
95 indent = 0;
96 for (int_4 phase = HEADER; phase < MAXPHA; phase++) {
97 int_4 N = 0;
98 NEW_RECORD (prev);
99 prev[0] = '\0';
100 for (int_4 c_src = 0; c_src < n_c_src; c_src++) {
101 C_SRC *lin = &object[c_src];
102 if (! (lin->proc == proc && lin->phase == phase)) {
103 continue;
104 } else if (lin->text != NULL) {
105 int_4 last = strlen (lin->text) - 1;
106 if (lin->text[0] == '\f') {
107 newline (obj, lin->text, phase, TRUE);
108 prev[0] = '\0';
109 N = 0;
110 } else if (lin->text[0] == '\"' && lin->text[last] == '\"') {
111 fprintf (obj, "%s", lin->text);
112 } else if (lin->text[0] == '\'' && lin->text[last] == '\'') {
113 fprintf (obj, "%s", lin->text);
114 } else {
115 // Close block - indent less.
116 if (no_comment (lin->text) && strchr (lin->text, '}') != NULL && strchr (lin->text, '{') == NULL) {
117 indent = _max (0, indent - INDENT);
118 }
119 // Indent, but not comments or cpp directives.
120 if (nl && strncmp (lin->text, "# ", 2) != 0 && strncmp (lin->text, "//", 2) != 0) {
121 if (strncmp (lin->text, "#define", 7) != 0) {
122 indentation (obj, indent);
123 printed += INDENT;
124 }
125 nl = FALSE;
126 }
127 // Write new line.
128 if (lin->text[last] == '\n') {
129 nl = TRUE;
130 last--;
131 }
132 if (last >= 0) {
133 // Open block - indent more.
134 if (no_comment (lin->text) && strchr (lin->text, '{') != NULL && strchr (lin->text, '}') == NULL) {
135 indent += INDENT;
136 }
137 // Write respecting LINE_WIDTH.
138 if (strncmp (lin->text, "#", 1) == 0 || strncmp (lin->text, "//", 2) == 0) {
139 NEW_RECORD (str);
140 bufcpy (str, lin->text, RECLN);
141 int_4 len = strlen (str);
142 if (len > 0 && str[len - 1] == '\n') {
143 str[len - 1] = '\0';
144 }
145 fprintf (obj, "%s", str);
146 } else if (strncmp (lin->text, "~", 1) == 0) {
147 NEW_RECORD (str);
148 bufcpy (str, lin->text, RECLN);
149 int_4 len = strlen (str);
150 if (len > 0 && str[len - 1] == '\n') {
151 str[len - 1] = '\0';
152 }
153 fprintf (obj, "%s", &str[1]);
154 } else {
155 NEW_RECORD (str);
156 bufcpy (str, lin->text, RECLN);
157 char *rest = NULL, *token;
158 for (token = strtok_r (str, " ", &rest); token != NULL; token = strtok_r (NULL, " ", &rest)) {
159 int_4 len = strlen (token);
160 if (N > 0) {
161 if (strchr (",;)}", token[0]) == NULL) {
162 if (strlen (prev) > 0 && strchr ("([", prev[strlen(prev) - 1]) == NULL) {
163 fprintf (obj, " ");
164 printed++;
165 }
166 }
167 }
168 if (printed + len >= LINE_WIDTH) {
169 newline (obj, lin->text, phase, FALSE);
170 indentation (obj, indent);
171 printed = INDENT;
172 prev[0] = '\0';
173 N = 0;
174 }
175 NEW_RECORD (tok);
176 bufcpy (tok, token, RECLN);
177 int_4 M = strlen (tok);
178 if (M > 0 && tok[M - 1] == '\n') {
179 tok[M - 1] = '\0';
180 }
181 fprintf (obj, "%s", tok);
182 bufcpy (prev, tok /* token ? */, RECLN);
183 printed += strlen (tok);
184 N++;
185 }
186 }
187 }
188 // New line afterwards.
189 if (nl) {
190 newline (obj, lin->text, phase, FALSE);
191 printed = 0;
192 prev[0] = '\0';
193 N = 0;
194 }
195 }
196 }
197 }
198 // Final new line.
199 if (proc == 0) {
200 newline (obj, "\n", MAXPHA, FALSE);
201 }
202 }
203 if (proc > 0) {
204 newline (obj, "\n", MAXPHA, FALSE);
205 }
206 }
207
208 void write_object (char *name)
209 {
210 // Object code to file.
211 FILE *obj;
212 int_4 proc;
213 if ((obj = fopen (name, "w")) == NULL) {
214 FATAL (1301, "cannot open for writing", name);
215 exit (EXIT_FAILURE);
216 };
217 page = 0;
218 for (proc = 0; proc <= nprocs; proc++) {
219 emit_code (obj, proc);
220 }
221 fclose (obj);
222 }
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© 2002-2025 J.M. van der Veer (jmvdveer@xs4all.nl)
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