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authorDavid Walter Seikel2012-01-04 18:41:13 +1000
committerDavid Walter Seikel2012-01-04 18:41:13 +1000
commitdd7595a3475407a7fa96a97393bae8c5220e8762 (patch)
treee341e911d7eb911a51684a7412ef7f7c7605d28e /libraries/embryo/src/lib/embryo_args.c
parentAdd the skeleton. (diff)
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Add the base Enlightenment Foundation Libraries - eina, eet, evas, ecore, embryo, and edje.
Note that embryo wont be used, but I'm not sure yet if you can build edje without it.
Diffstat (limited to 'libraries/embryo/src/lib/embryo_args.c')
-rw-r--r--libraries/embryo/src/lib/embryo_args.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/libraries/embryo/src/lib/embryo_args.c b/libraries/embryo/src/lib/embryo_args.c
new file mode 100644
index 0000000..0c0089e
--- /dev/null
+++ b/libraries/embryo/src/lib/embryo_args.c
@@ -0,0 +1,128 @@
1#ifdef HAVE_CONFIG_H
2# include "config.h"
3#endif
4
5#ifdef HAVE_ALLOCA_H
6# include <alloca.h>
7#elif defined __GNUC__
8# define alloca __builtin_alloca
9#elif defined _AIX
10# define alloca __alloca
11#elif defined _MSC_VER
12# include <malloc.h>
13# define alloca _alloca
14#else
15# include <stddef.h>
16# ifdef __cplusplus
17extern "C"
18# endif
19void *alloca (size_t);
20#endif
21
22#include "Embryo.h"
23#include "embryo_private.h"
24
25#define STRSET(ep, par, str) { \
26 Embryo_Cell *___cptr; \
27 if ((___cptr = embryo_data_address_get(ep, par))) { \
28 embryo_data_string_set(ep, str, ___cptr); \
29 } }
30
31/* exported args api */
32
33static Embryo_Cell
34_embryo_args_numargs(Embryo_Program *ep, Embryo_Cell *params __UNUSED__)
35{
36 Embryo_Header *hdr;
37 unsigned char *data;
38 Embryo_Cell bytes;
39
40 hdr = (Embryo_Header *)ep->base;
41 data = ep->base + (int)hdr->dat;
42 bytes = *(Embryo_Cell *)(data + (int)ep->frm +
43 (2 * sizeof(Embryo_Cell)));
44 return bytes / sizeof(Embryo_Cell);
45}
46
47static Embryo_Cell
48_embryo_args_getarg(Embryo_Program *ep, Embryo_Cell *params)
49{
50 Embryo_Header *hdr;
51 unsigned char *data;
52 Embryo_Cell val;
53
54 if (params[0] != (2 * sizeof(Embryo_Cell))) return 0;
55 hdr = (Embryo_Header *)ep->base;
56 data = ep->base + (int)hdr->dat;
57 val = *(Embryo_Cell *)(data + (int)ep->frm +
58 (((int)params[1] + 3) * sizeof(Embryo_Cell)));
59 val += params[2] * sizeof(Embryo_Cell);
60 val = *(Embryo_Cell *)(data + (int)val);
61 return val;
62}
63
64static Embryo_Cell
65_embryo_args_setarg(Embryo_Program *ep, Embryo_Cell *params)
66{
67 Embryo_Header *hdr;
68 unsigned char *data;
69 Embryo_Cell val;
70
71 if (params[0] != (3 * sizeof(Embryo_Cell))) return 0;
72 hdr = (Embryo_Header *)ep->base;
73 data = ep->base + (int)hdr->dat;
74 val = *(Embryo_Cell *)(data + (int)ep->frm +
75 (((int)params[1] + 3) * sizeof(Embryo_Cell)));
76 val += params[2] * sizeof(Embryo_Cell);
77 if ((val < 0) || ((val >= ep->hea) && (val < ep->stk))) return 0;
78 *(Embryo_Cell *)(data + (int)val) = params[3];
79 return 1;
80}
81
82static Embryo_Cell
83_embryo_args_getsarg(Embryo_Program *ep, Embryo_Cell *params)
84{
85 Embryo_Header *hdr;
86 unsigned char *data;
87 Embryo_Cell base_cell;
88 char *s;
89 int i = 0;
90
91 /* params[1] = arg_no */
92 /* params[2] = buf */
93 /* params[3] = buflen */
94 if (params[0] != (3 * sizeof(Embryo_Cell))) return 0;
95 if (params[3] <= 0) return 0; /* buflen must be > 0 */
96 hdr = (Embryo_Header *)ep->base;
97 data = ep->base + (int)hdr->dat;
98 base_cell = *(Embryo_Cell *)(data + (int)ep->frm +
99 (((int)params[1] + 3) * sizeof(Embryo_Cell)));
100
101 s = alloca(params[3]);
102
103 while (i < params[3])
104 {
105 int offset = base_cell + (i * sizeof(Embryo_Cell));
106
107 s[i] = *(Embryo_Cell *)(data + offset);
108 if (!s[i++]) break;
109 }
110
111 s[i - 1] = 0;
112 STRSET(ep, params[2], s);
113
114 return i - 1; /* characters written minus terminator */
115}
116
117/* functions used by the rest of embryo */
118
119void
120_embryo_args_init(Embryo_Program *ep)
121{
122 embryo_program_native_call_add(ep, "numargs", _embryo_args_numargs);
123 embryo_program_native_call_add(ep, "getarg", _embryo_args_getarg);
124 embryo_program_native_call_add(ep, "setarg", _embryo_args_setarg);
125 embryo_program_native_call_add(ep, "getfarg", _embryo_args_getarg);
126 embryo_program_native_call_add(ep, "setfarg", _embryo_args_setarg);
127 embryo_program_native_call_add(ep, "getsarg", _embryo_args_getsarg);
128}