1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/* SPDX-License-Identifier: copyleft-next-0.3.1 */
/* Copyright 2024 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
/**
* @file compiler.c
*
* Top level compiler implementation.
*/
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>
#include <fwd/compiler.h>
#include <fwd/analyze.h>
#include <fwd/parser.h>
#include <fwd/debug.h>
#include <fwd/lower.h>
#include <fwd/scope.h>
#include <fwd/path.h>
#include <fwd/move.h>
/**
* Read whole file into a buffer and return pointer to buffer.
* Possibly kind of silly to have both \p file and \p f.
* Apparently there's no standardized way to get the file name of a
* file pointer.
*
* @param file Name of file to read.
* @param f File pointer.
* @return Pointer to buffer with file contents.
*/
static char *read_file(const char *file, FILE *f)
{
fseek(f, 0, SEEK_END);
/** @todo check how well standardized this actually is */
long s = ftell(f);
if (s == LONG_MAX) {
error("%s might be a directory", file);
return NULL;
}
fseek(f, 0, SEEK_SET);
char *buf = malloc((size_t)(s + 1));
if (!buf)
return NULL;
fread(buf, (size_t)(s + 1), 1, f);
/* remember terminating null */
buf[s] = 0;
return buf;
}
/**
* Helper for process_file(), actually processes the file
* after process_file() has done path lookups and working directory
* changes and whatnot.
*
* @param parent Parent file context. \c NULL if root file.
* @param public \c 1 if file is being imported publicly, \c 0 otherwise.
* @param file File name to process.
* @return \c 0 if processing was succesful, non-zero value otherwise.
*/
static int process(struct scope *scope, const char *file)
{
FILE *f = fopen(file, "rb");
if (!f) {
error("failed opening %s: %s", file, strerror(errno));
return -1;
}
const char *buf = read_file(file, f);
fclose(f);
if (!buf)
return -1;
struct parser *p = create_parser();
if (!p) {
free((void *)buf);
return -1;
}
parse(p, file, buf);
struct ast *tree = p->tree;
bool failed = p->failed;
destroy_parser(p);
if (failed) {
free((void *)buf);
return -1;
}
ast_dump_list(0, tree);
scope->fctx.fbuf = buf;
scope->fctx.fname = strdup(file);
if (analyze_root(scope, tree))
return -1;
if (mvcheck_root(tree))
return -1;
return 0;
}
#define MAP_KEY const char *
#define MAP_TYPE struct scope *
#define MAP_CMP(a, b) strcmp((a), (b))
#define MAP_HASH(a) CONTS_MAP_STR_HASH(a)
#define MAP_NAME scopes
#include <conts/map.h>
/* ugly global for now */
static struct scopes scopes;
static void destroy_scopes()
{
foreach(scopes, n, &scopes) {
destroy_scope(n->data);
free((void *)n->key);
}
scopes_destroy(&scopes);
}
struct scope *compile_file(const char *file)
{
struct scope *scope = NULL;
const char *base = NULL, *dir = NULL, *cwd = NULL, *real = NULL;
if (!(base = fwd_basename(file))) {
error("couldn't get basename of %s", file);
goto out;
}
if (!(dir = fwd_dirname(file))) {
error("couldn't get dirname of %s", file);
goto out;
}
if (!(cwd = fwd_cwdname())) {
error("couldn't get current working dir");
goto out;
}
if (*dir != 0 && chdir(dir)) {
error("couldn't change to directory %s: %s", dir,
strerror(errno));
goto out;
}
if (!(real = realpath(base, NULL))) {
error("no such file: %s", file);
goto out;
}
struct scope **exists = scopes_find(&scopes, real);
if (exists) {
scope = *exists;
goto out;
}
scope = create_scope();
scopes_insert(&scopes, strdup(real), scope);
if (process(scope, base)) {
scope = NULL;
goto out;
}
if (chdir(cwd)) {
error("couldn't change back to directory %s: %s", cwd,
strerror(errno));
goto out;
}
out:
free((void *)base);
free((void *)dir);
free((void *)cwd);
free((void *)real);
return scope;
}
int compile(const char *input) {
scopes = scopes_create(1);
int ret = -1;
struct scope *root = compile_file(input);
if (!root) {
error("processing of %s stopped due to errors", input);
goto out;
}
if ((ret = lower(root))) {
error("lowering of %s failed due to errors", input);
goto out;
}
out:
destroy_scopes();
destroy_allocs();
return ret;
}
|
