summaryrefslogtreecommitdiffhomepage
path: root/src/driver/sfrt_driver_ctx.c
blob: 58cccd7ab63d32704550cef177775b4e85530bf8 (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
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>

#define ARGV_DRIVER

#include <sofort/sofort.h>
#include "sofort_version.h"
#include "sofort_driver_impl.h"
#include "argv/argv.h"

/* package info */
static const struct sfrt_source_version sfrt_src_version = {
	SFRT_TAG_VER_MAJOR,
	SFRT_TAG_VER_MINOR,
	SFRT_TAG_VER_PATCH,
	SOFORT_GIT_VERSION
};

struct sfrt_driver_ctx_alloc {
	struct argv_meta *		meta;
	struct sfrt_driver_ctx_impl	ctx;
	uint64_t			guard;
	const char *			units[];
};

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

	if (flags & SFRT_DRIVER_VERBOSITY_NONE)
		ret |= ARGV_VERBOSITY_NONE;

	if (flags & SFRT_DRIVER_VERBOSITY_ERRORS)
		ret |= ARGV_VERBOSITY_ERRORS;

	if (flags & SFRT_DRIVER_VERBOSITY_STATUS)
		ret |= ARGV_VERBOSITY_STATUS;

	return ret;
}

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

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

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

	return SFRT_USAGE;
}

static struct sfrt_driver_ctx_impl * sfrt_driver_ctx_alloc(
	struct argv_meta *		meta,
	const struct sfrt_common_ctx *	cctx,
	size_t				nunits)
{
	struct sfrt_driver_ctx_alloc *	ictx;
	size_t				size;
	struct argv_entry *		entry;
	const char **			units;
	int				elements;

	size =  sizeof(struct sfrt_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));

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

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

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

int sfrt_get_driver_ctx(
	char **				argv,
	char **				envp,
	uint32_t			flags,
	struct sfrt_driver_ctx **	pctx)
{
	struct sfrt_driver_ctx_impl *	ctx;
	struct sfrt_common_ctx		cctx;
	const struct argv_option *	optv[SFRT_OPTV_ELEMENTS];
	struct argv_meta *		meta;
	struct argv_entry *		entry;
	size_t				nunits;
	const char *			program;

	(void)envp;

	argv_optv_init(sfrt_default_options,optv);

	if (!(meta = argv_get(argv,optv,sfrt_argv_flags(flags))))
		return -1;

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

	if (!argv[1] && (flags & SFRT_DRIVER_VERBOSITY_USAGE))
		return sfrt_driver_usage(program,0,optv,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 & SFRT_DRIVER_VERBOSITY_USAGE)
						return sfrt_driver_usage(program,entry->arg,optv,meta);

				case TAG_VERSION:
					cctx.drvflags |= SFRT_DRIVER_VERSION;
					break;
/* dummy */
/* dummy */			case TAG_OUTPUT_DUMMY:
/* dummy */				cctx.anystring = entry->arg;
/* dummy */				break;
/* dummy */
/* dummy */			case TAG_OUTPUT_PROPERTY:
/* dummy */				if (!(strcmp(entry->arg,"name")))
/* dummy */					cctx.actflags |= SFRT_OUTPUT_NAME;
/* dummy */				else if (!(strcmp(entry->arg,"address")))
/* dummy */					cctx.actflags |= SFRT_OUTPUT_ADDRESS;
/* dummy */				break;
			}
		} else
			nunits++;
	}

	if (!(ctx = sfrt_driver_ctx_alloc(meta,&cctx,nunits)))
		return sfrt_get_driver_ctx_fail(meta);

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

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

int sfrt_create_driver_ctx(
	const struct sfrt_common_ctx *	cctx,
	struct sfrt_driver_ctx **	pctx)
{
	const struct argv_option *	optv[SFRT_OPTV_ELEMENTS];
	struct argv_meta *		meta;
	struct sfrt_driver_ctx_impl *	ctx;
	char *				argv[] = {"sofort_driver",0};

	argv_optv_init(sfrt_default_options,optv);

	if (!(meta = argv_get(argv,optv,0)))
		return -1;

	if (!(ctx = sfrt_driver_ctx_alloc(meta,cctx,0)))
		return sfrt_get_driver_ctx_fail(0);

	ctx->ctx.cctx = &ctx->cctx;
	memcpy(&ctx->cctx,cctx,sizeof(*cctx));
	*pctx = &ctx->ctx;
	return SFRT_OK;
}

static void sfrt_free_driver_ctx_impl(struct sfrt_driver_ctx_alloc * ictx)
{
	argv_free(ictx->meta);
	free(ictx);
}

void sfrt_free_driver_ctx(struct sfrt_driver_ctx * ctx)
{
	struct sfrt_driver_ctx_alloc *	ictx;
	uintptr_t			addr;

	if (ctx) {
		addr = (uintptr_t)ctx - offsetof(struct sfrt_driver_ctx_impl,ctx);
		addr = addr - offsetof(struct sfrt_driver_ctx_alloc,ctx);
		ictx = (struct sfrt_driver_ctx_alloc *)addr;
		sfrt_free_driver_ctx_impl(ictx);
	}
}

const struct sfrt_source_version * sfrt_source_version(void)
{
	return &sfrt_src_version;
}