summaryrefslogtreecommitdiffhomepage
path: root/src/driver/pe_driver_ctx.c
blob: 021a7fb81819561db8c8fdaf4e453525f1b79e56 (plain)
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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
/***************************************************************/
/*  perk: PE Resource Kit                                      */
/*  Copyright (C) 2015--2016  Z. Gilboa                        */
/*  Released under GPLv2 and GPLv3; see COPYING.PERK.          */
/***************************************************************/

#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>

#define ARGV_DRIVER

#include <perk/perk.h>
#include <perk/perk_output.h>
#include "perk_version.h"
#include "perk_driver_impl.h"
#include "argv/argv.h"

/* package info */
static const struct pe_source_version pe_src_version = {
	PERK_TAG_VER_MAJOR,
	PERK_TAG_VER_MINOR,
	PERK_TAG_VER_PATCH,
	PERK_GIT_VERSION
};

struct pe_driver_ctx_alloc {
	struct argv_meta *		meta;
	struct pe_driver_ctx_impl	ctx;
	uint64_t			guard;
	const char *			units[];
};

static uint32_t pe_argv_flags(uint32_t flags)
{
	uint32_t ret = 0;

	if (flags & PERK_DRIVER_VERBOSITY_NONE)
		ret |= ARGV_VERBOSITY_NONE;

	if (flags & PERK_DRIVER_VERBOSITY_ERRORS)
		ret |= ARGV_VERBOSITY_ERRORS;

	if (flags & PERK_DRIVER_VERBOSITY_STATUS)
		ret |= ARGV_VERBOSITY_STATUS;

	return ret;
}

static int pe_driver_usage(
	const char *			program,
	const char *			arg,
	const struct argv_option *	options,
	struct argv_meta *		meta)
{
	char header[512];

	snprintf(header,sizeof(header),
		"Usage: %s [options] <file>...\n" "Options:\n",
		program);

	argv_usage(stdout,header,options,arg);
	argv_free(meta);

	return PERK_USAGE;
}

static struct pe_driver_ctx_impl * pe_driver_ctx_alloc(
	struct argv_meta *		meta,
	const struct pe_common_ctx *	cctx,
	size_t				nunits)
{
	struct pe_driver_ctx_alloc *	ictx;
	size_t				size;
	struct argv_entry *		entry;
	const char **			units;
	int				elements;

	size =  sizeof(struct pe_driver_ctx_alloc);
	size += (nunits+1)*sizeof(const char *);

	if (!(ictx = calloc(1,size)))
		return 0;

	if (cctx)
		memcpy(&ictx->ctx.cctx,cctx,sizeof(*cctx));

	elements = sizeof(ictx->ctx.erribuf) / sizeof(*ictx->ctx.erribuf);

	ictx->ctx.errinfp  = &ictx->ctx.erriptr[0];
	ictx->ctx.erricap  = &ictx->ctx.erriptr[--elements];

	ictx->meta = meta;

	for (entry=meta->entries,units=ictx->units; entry->fopt || entry->arg; entry++)
		if (!entry->fopt)
			*units++ = entry->arg;

	ictx->ctx.ctx.units = ictx->units;
	ictx->ctx.ctx.errv  = ictx->ctx.errinfp;
	return &ictx->ctx;
}

static int pe_get_driver_ctx_fail(struct argv_meta * meta)
{
	argv_free(meta);
	return -1;
}

int pe_get_driver_ctx(
	char **			argv,
	char **			envp,
	uint32_t		flags,
	struct pe_driver_ctx ** pctx)
{
	struct pe_driver_ctx_impl *	ctx;
	struct pe_common_ctx		cctx;
	const struct argv_option *	options;
	struct argv_meta *		meta;
	struct argv_entry *		entry;
	size_t				nunits;
	const char *			program;
	const char *			pretty;
	int				fdout;

	(void)envp;

	options = pe_default_options;

	if (!(meta = argv_get(argv,options,pe_argv_flags(flags))))
		return -1;

	pretty	= 0;
	nunits	= 0;
	fdout	= 0;
	program = argv_program_name(argv[0]);
	memset(&cctx,0,sizeof(cctx));
	cctx.drvflags = flags;

	if (!argv[1] && (flags & PERK_DRIVER_VERBOSITY_USAGE))
		return pe_driver_usage(program,0,options,meta);

	/* get options, count units */
	for (entry=meta->entries; entry->fopt || entry->arg; entry++) {
		if (entry->fopt) {
			switch (entry->tag) {
				case TAG_HELP:
					if (flags & PERK_DRIVER_VERBOSITY_USAGE)
						return pe_driver_usage(program,entry->arg,options,meta);

				case TAG_VERSION:
					cctx.drvflags |= PERK_DRIVER_VERSION;
					break;

				case TAG_OUTPUT:
					cctx.output = entry->arg;
					break;

				case TAG_PRETTY:
					pretty = entry->arg;
					break;

				case TAG_IMGTYPE:
					cctx.fmtflags |= PERK_OUTPUT_IMAGE_TYPE;
					break;

				case TAG_EXPSYMS:
					cctx.fmtflags |= PERK_OUTPUT_EXPORT_SYMS;
					break;

				case TAG_IMPLIBS:
					cctx.fmtflags |= PERK_OUTPUT_IMPORT_LIBS;
					break;

				case TAG_IMPSYMS:
					cctx.fmtflags |= PERK_OUTPUT_IMPORT_SYMS;
					break;
			}
		} else
			nunits++;
	}

	if (cctx.output && ((fdout = open(cctx.output,
			O_CREAT|O_TRUNC|O_WRONLY|O_NOCTTY|O_NOFOLLOW,
			S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0))
		return pe_get_driver_ctx_fail(meta);

	if (pretty && !strcmp(pretty,"yaml"))
		cctx.fmtflags |= PERK_PRETTY_YAML;
	else if (pretty && !strcmp(pretty,"dlltool"))
		cctx.fmtflags |= PERK_PRETTY_DLLTOOL;

	if (!(ctx = pe_driver_ctx_alloc(meta,&cctx,nunits)) && cctx.output)
		close(fdout);

	if (!ctx)
		return pe_get_driver_ctx_fail(meta);

	ctx->ctx.program	= program;
	ctx->ctx.cctx		= &ctx->cctx;

	*pctx = &ctx->ctx;
	return PERK_OK;
}

static void pe_free_driver_ctx_impl(struct pe_driver_ctx_alloc * ictx)
{
	argv_free(ictx->meta);
	free(ictx);
}

void pe_free_driver_ctx(struct pe_driver_ctx * ctx)
{
	struct pe_driver_ctx_alloc *	ictx;
	uintptr_t			addr;

	if (ctx) {
		addr = (uintptr_t)ctx - offsetof(struct pe_driver_ctx_impl,ctx);
		addr = addr - offsetof(struct pe_driver_ctx_alloc,ctx);
		ictx = (struct pe_driver_ctx_alloc *)addr;
		pe_free_driver_ctx_impl(ictx);
	}
}

const struct pe_source_version * pe_source_version(void)
{
	return &pe_src_version;
}