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
|
#include <Python.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "pci.h"
#include "debug.h"
#include "pcilib.h"
#include "py.h"
#include "error.h"
struct pcilib_py_s {
PyObject *main_module;
PyObject *global_dict;
};
int pcilib_init_py(pcilib_t *ctx) {
ctx->py = (pcilib_py_t*)malloc(sizeof(pcilib_py_t));
if (!ctx->py) return PCILIB_ERROR_MEMORY;
Py_Initialize();
ctx->py->main_module = PyImport_AddModule("__parser__");
if (!ctx->py->main_module)
return PCILIB_ERROR_FAILED;
ctx->py->global_dict = PyModule_GetDict(ctx->py->main_module);
if (!ctx->py->global_dict)
return PCILIB_ERROR_FAILED;
return 0;
}
void pcilib_free_py(pcilib_t *ctx) {
if (ctx->py) {
// Dict and module references are borrowed
free(ctx->py);
ctx->py = NULL;
}
Py_Finalize();
}
/*
static int pcilib_py_realloc_string(pcilib_t *ctx, size_t required, size_t *size, char **str) {
char *ptr;
size_t cur = *size;
if ((required + 1) > cur) {
while (cur < required) cur *= 2;
ptr = (char*)realloc(*str, cur);
if (!ptr) return PCILIB_ERROR_MEMORY;
*size = cur;
*str = ptr;
}
]
return 0;
}
*/
static char *pcilib_py_parse_string(pcilib_t *ctx, const char *codestr, pcilib_value_t *value) {
int i;
int err = 0;
pcilib_value_t val = {0};
pcilib_register_value_t regval;
char save;
char *reg, *cur;
size_t offset = 0;
size_t size;
char *src;
char *dst;
size_t max_repl = 2 + 2 * sizeof(pcilib_value_t); // the text representation of largest integer
if (value) {
err = pcilib_copy_value(ctx, &val, value);
if (err) return NULL;
err = pcilib_convert_value_type(ctx, &val, PCILIB_TYPE_STRING);
if (err) return NULL;
if (strlen(val.sval) > max_repl)
max_repl = strlen(val.sval);
}
size = ((max_repl + 1) / 3 + 1) * strlen(codestr); // minimum register length is 3 symbols ($a + delimiter space), it is replaces with (max_repl+1) symbols
src = strdup(codestr);
dst = (char*)malloc(size); // allocating maximum required space
if ((!src)||(!dst)) {
if (src) free(src);
if (dst) free(dst);
pcilib_error("Failed to allocate memory for string formulas");
return NULL;
}
cur = src;
reg = strchr(src, '$');
while (reg) {
strcpy(dst + offset, cur);
offset += reg - cur;
// find the end of the register name
reg++;
for (i = 0; isalnum(reg[i])||(reg[i] == '_'); i++);
save = reg[i];
reg[i] = 0;
// determine replacement value
if (!strcasecmp(reg, "value")) {
if (!value) {
pcilib_error("Python formula (%s) relies on the value of register, but it is not provided", codestr);
err = PCILIB_ERROR_INVALID_REQUEST;
break;
}
strcpy(dst + offset, val.sval);
} else {
err = pcilib_read_register(ctx, NULL, reg, ®val);
if (err) break;
sprintf(dst + offset, "0x%x", regval);
}
offset += strlen(dst + offset);
reg[i] = save;
// Advance to the next register if any
cur = reg + i;
reg = strchr(cur, '$');
}
strcpy(dst + offset, cur);
free(src);
if (err) {
free(dst);
return NULL;
}
return dst;
}
int pcilib_py_eval_string(pcilib_t *ctx, const char *codestr, pcilib_value_t *value) {
PyGILState_STATE gstate;
char *code;
PyObject* obj;
code = pcilib_py_parse_string(ctx, codestr, value);
if (!code) {
pcilib_error("Failed to parse registers in the code: %s", codestr);
return PCILIB_ERROR_FAILED;
}
gstate = PyGILState_Ensure();
obj = PyRun_String(code, Py_eval_input, ctx->py->global_dict, ctx->py->global_dict);
PyGILState_Release(gstate);
if (!obj) {
pcilib_error("Failed to run the Python code: %s", code);
return PCILIB_ERROR_FAILED;
}
pcilib_debug(VIEWS, "Evaluating a Python string \'%s\' to %lf=\'%s\'", codestr, PyFloat_AsDouble(obj), code);
return pcilib_set_value_from_float(ctx, value, PyFloat_AsDouble(obj));
}
|
