Mercurial > cpython-lru_cache-weakref

annotate Modules/structmodule.c @ 2800:ab3dca97ffbe legacy-trunk

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new grammar for 3rd raise arg and keyword parameters
author Guido van Rossum <guido@python.org>
date Fri, 07 Jul 1995 22:26:23 +0000
parents 65644766158a
children 65d2d8e67da3
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1 /***********************************************************
2061
172ba04a5191 Added 1995 to copyright message.
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
172ba04a5191 Added 1995 to copyright message.
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI not be used in advertising or publicity pertaining to
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13 distribution of the software without specific, written prior permission.
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14
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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22
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23 ******************************************************************/
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24
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25 /* struct module -- pack values into and (out of) strings */
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26
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27 #include "allobjects.h"
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28 #include "modsupport.h"
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29
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30 static object *StructError;
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32
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33 /* Define various structs to figure out the alignments of types */
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34
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35 #ifdef __MWERKS__
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36 /*
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37 ** XXXX We have a problem here. There are no unique alignment rules
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38 ** on the PowerPC mac.
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39 */
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40 #ifdef __powerc
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41 #pragma options align=mac68k
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42 #endif
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43 #endif /* __MWERKS__ */
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44
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45 typedef struct { char c; short x; } s_short;
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46 typedef struct { char c; int x; } s_int;
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47 typedef struct { char c; long x; } s_long;
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48 typedef struct { char c; float x; } s_float;
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49 typedef struct { char c; double x; } s_double;
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50
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51 #define SHORT_ALIGN (sizeof(s_short) - sizeof(short))
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52 #define INT_ALIGN (sizeof(s_int) - sizeof(int))
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53 #define LONG_ALIGN (sizeof(s_long) - sizeof(long))
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54 #define FLOAT_ALIGN (sizeof(s_float) - sizeof(float))
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55 #define DOUBLE_ALIGN (sizeof(s_double) - sizeof(double))
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56
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57 #ifdef __powerc
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58 #pragma options align=reset
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59 #endif
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62 /* Align a size according to a format code */
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63
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64 static int
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65 align(size, c)
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66 int size;
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67 int c;
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68 {
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69 int a;
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70
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71 switch (c) {
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72 case 'h': a = SHORT_ALIGN; break;
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73 case 'i': a = INT_ALIGN; break;
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74 case 'l': a = LONG_ALIGN; break;
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75 case 'f': a = FLOAT_ALIGN; break;
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76 case 'd': a = DOUBLE_ALIGN; break;
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77 default: return size;
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78 }
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79 return (size + a - 1) / a * a;
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80 }
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81
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82
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83 /* calculate the size of a format string */
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84
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85 static int
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86 calcsize(fmt)
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87 char *fmt;
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88 {
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89 char *s;
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90 char c;
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91 int size, num, itemsize, x;
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92
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93 s = fmt;
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94 size = 0;
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95 while ((c = *s++) != '\0') {
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96 if ('0' <= c && c <= '9') {
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97 num = c - '0';
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98 while ('0' <= (c = *s++) && c <= '9') {
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99 x = num*10 + (c - '0');
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100 if (x/10 != num) {
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101 err_setstr(StructError,
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102 "int overflow in fmt");
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103 return -1;
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104 }
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105 num = x;
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106 }
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107 if (c == '\0')
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108 break;
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109 }
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110 else
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111 num = 1;
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112
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113 size = align(size, c);
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114
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115 switch (c) {
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116
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117 case 'x': /* pad byte */
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118 case 'b': /* byte-sized int */
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119 case 'c': /* char */
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120 itemsize = 1;
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121 break;
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122
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123 case 'h': /* short ("half-size)" int */
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124 itemsize = sizeof(short);
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125 break;
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diff changeset
126
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
127 case 'i': /* natural-size int */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
128 itemsize = sizeof(int);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
129 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
130
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
131 case 'l': /* long int */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
132 itemsize = sizeof(long);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
133 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
134
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
135 case 'f': /* float */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
136 itemsize = sizeof(float);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
137 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
138
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
139 case 'd': /* double */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
140 itemsize = sizeof(double);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
141 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
142
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
143 default:
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
144 err_setstr(StructError, "bad char in fmt");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
145 return -1;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
146
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
147 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
148
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
149 x = num * itemsize;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
150 size += x;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
151 if (x/itemsize != num || size < 0) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
152 err_setstr(StructError, "total struct size too long");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
153 return -1;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
154 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
155
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
156 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
157
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
158 return size;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
159 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
160
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
161
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
162 /* pack(fmt, v1, v2, ...) --> string */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
163
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
164 static object *
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
165 struct_calcsize(self, args)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
166 object *self; /* Not used */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
167 object *args;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
168 {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
169 char *fmt;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
170 int size;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
171
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
172 if (!getargs(args, "s", &fmt))
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
173 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
174 size = calcsize(fmt);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
175 if (size < 0)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
176 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
177 return newintobject((long)size);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
178 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
179
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
180
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
181 /* pack(fmt, v1, v2, ...) --> string */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
182
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
183 static object *
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
184 struct_pack(self, args)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
185 object *self; /* Not used */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
186 object *args;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
187 {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
188 object *format, *result, *v;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
189 char *fmt;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
190 int size, num;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
191 int i, n;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
192 char *s, *res, *restart;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
193 char c;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
194 long ival;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
195 double fval;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
196
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
197 if (args == NULL || !is_tupleobject(args) ||
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
198 (n = gettuplesize(args)) < 1) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
199 err_badarg();
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
200 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
201 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
202 format = gettupleitem(args, 0);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
203 if (!getargs(format, "s", &fmt))
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
204 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
205 size = calcsize(fmt);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
206 if (size < 0)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
207 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
208 result = newsizedstringobject((char *)NULL, size);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
209 if (result == NULL)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
210 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
211
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
212 s = fmt;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
213 i = 1;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
214 res = restart = getstringvalue(result);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
215
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
216 while ((c = *s++) != '\0') {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
217 if ('0' <= c && c <= '9') {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
218 num = c - '0';
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
219 while ('0' <= (c = *s++) && c <= '9')
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
220 num = num*10 + (c - '0');
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
221 if (c == '\0')
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
222 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
223 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
224 else
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
225 num = 1;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
226
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
227 res = restart + align((int)(res-restart), c);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
228
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
229 while (--num >= 0) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
230 switch (c) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
231
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
232 case 'x': /* pad byte */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
233 *res++ = '\0';
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
234 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
235
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
236 case 'l':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
237 case 'i':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
238 case 'h':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
239 case 'b':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
240 if (i >= n) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
241 err_setstr(StructError,
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
242 "insufficient arguments to pack");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
243 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
244 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
245 v = gettupleitem(args, i++);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
246 if (!is_intobject(v)) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
247 err_setstr(StructError,
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
248 "bad argument type to pack");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
249 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
250 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
251 ival = getintvalue(v);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
252 switch (c) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
253 case 'b':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
254 *res++ = ival;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
255 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
256 case 'h':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
257 *(short*)res = ival;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
258 res += sizeof(short);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
259 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
260 case 'i':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
261 *(int*)res = ival;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
262 res += sizeof(int);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
263 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
264 case 'l':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
265 *(long*)res = ival;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
266 res += sizeof(long);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
267 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
268 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
269 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
270
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
271 case 'c':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
272 if (i >= n) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
273 err_setstr(StructError,
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
274 "insufficient arguments to pack");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
275 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
276 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
277 v = gettupleitem(args, i++);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
278 if (!is_stringobject(v) ||
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
279 getstringsize(v) != 1) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
280 err_setstr(StructError,
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
281 "bad argument type to pack");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
282 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
283 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
284 *res++ = getstringvalue(v)[0];
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
285 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
286
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
287 case 'd':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
288 case 'f':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
289 if (i >= n) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
290 err_setstr(StructError,
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
291 "insufficient arguments to pack");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
292 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
293 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
294 v = gettupleitem(args, i++);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
295 if (!is_floatobject(v)) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
296 err_setstr(StructError,
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
297 "bad argument type to pack");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
298 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
299 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
300 fval = getfloatvalue(v);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
301 switch (c) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
302 case 'f':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
303 *(float*)res = (float)fval;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
304 res += sizeof(float);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
305 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
306 case 'd':
2061
172ba04a5191 Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
307 memcpy(res, (char*)&fval, sizeof fval);
960
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
308 res += sizeof(double);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
309 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
310 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
311 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
312
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
313 default:
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
314 err_setstr(StructError, "bad char in fmt");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
315 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
316
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
317 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
318 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
319 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
320
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
321 if (i < n) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
322 err_setstr(StructError, "too many arguments for pack fmt");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
323 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
324 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
325
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
326 return result;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
327
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
328 fail:
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
329 DECREF(result);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
330 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
331 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
332
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
333
976
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
334 /* Helper to convert a list to a tuple */
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
335
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
336 static object *
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
337 totuple(list)
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
338 object *list;
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
339 {
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
340 int len = getlistsize(list);
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
341 object *tuple = newtupleobject(len);
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
342 if (tuple != NULL) {
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
343 int i;
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
344 for (i = 0; i < len; i++) {
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
345 object *v = getlistitem(list, i);
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
346 INCREF(v);
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
347 settupleitem(tuple, i, v);
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
348 }
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
349 }
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
350 DECREF(list);
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
351 return tuple;
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
352 }
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
353
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
354
960
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
355 /* unpack(fmt, string) --> (v1, v2, ...) */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
356
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
357 static object *
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
358 struct_unpack(self, args)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
359 object *self; /* Not used */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
360 object *args;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
361 {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
362 char *str, *start, *fmt, *s;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
363 char c;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
364 int len, size, num, x;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
365 object *res, *v;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
366
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
367 if (!getargs(args, "(ss#)", &fmt, &start, &len))
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
368 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
369 size = calcsize(fmt);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
370 if (size != len) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
371 err_setstr(StructError, "unpack str size does not match fmt");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
372 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
373 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
374 res = newlistobject(0);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
375 if (res == NULL)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
376 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
377 str = start;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
378 s = fmt;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
379 while ((c = *s++) != '\0') {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
380 if ('0' <= c && c <= '9') {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
381 num = c - '0';
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
382 while ('0' <= (c = *s++) && c <= '9')
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
383 num = num*10 + (c - '0');
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
384 if (c == '\0')
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
385 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
386 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
387 else
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
388 num = 1;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
389
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
390 str = start + align((int)(str-start), c);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
391
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
392 while (--num >= 0) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
393 switch (c) {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
394
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
395 case 'x':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
396 str++;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
397 continue;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
398
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
399 case 'b':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
400 x = *str++;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
401 if (x >= 128)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
402 x -= 256;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
403 v = newintobject((long)x);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
404 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
405
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
406 case 'c':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
407 v = newsizedstringobject(str, 1);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
408 str++;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
409 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
410
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
411 case 'h':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
412 v = newintobject((long)*(short*)str);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
413 str += sizeof(short);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
414 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
415
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
416 case 'i':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
417 v = newintobject((long)*(int*)str);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
418 str += sizeof(int);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
419 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
420
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
421 case 'l':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
422 v = newintobject(*(long*)str);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
423 str += sizeof(long);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
424 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
425
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
426 case 'f':
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
427 v = newfloatobject((double)*(float*)str);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
428 str += sizeof(float);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
429 break;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
430
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
431 case 'd':
2061
172ba04a5191 Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
432 {
172ba04a5191 Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
433 double d;
172ba04a5191 Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
434 memcpy((char *)&d, str, sizeof d);
172ba04a5191 Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
435 v = newfloatobject(d);
960
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
436 str += sizeof(double);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
437 break;
2061
172ba04a5191 Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
438 }
960
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
439
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
440 default:
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
441 err_setstr(StructError, "bad char in fmt");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
442 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
443
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
444 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
445 if (v == NULL || addlistitem(res, v) < 0)
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
446 goto fail;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
447 DECREF(v);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
448 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
449 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
450
976
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
451 return totuple(res);
960
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
452
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
453 fail:
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
454 DECREF(res);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
455 return NULL;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
456 }
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
457
976
31b018bda7e2 unpack() now returns a tuple, not a list
Guido van Rossum <guido@python.org>
parents: 960
diff changeset
458
960
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
459 /* List of functions */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
460
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
461 static struct methodlist struct_methods[] = {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
462 {"calcsize", struct_calcsize},
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
463 {"pack", struct_pack, 1/*varargs*/},
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
464 {"unpack", struct_unpack},
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
465 {NULL, NULL} /* sentinel */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
466 };
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
467
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
468
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
469 /* Module initialization */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
470
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
471 void
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
472 initstruct()
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
473 {
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
474 object *m, *d;
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
475
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
476 /* Create the module and add the functions */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
477 m = initmodule("struct", struct_methods);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
478
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
479 /* Add some symbolic constants to the module */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
480 d = getmoduledict(m);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
481 StructError = newstringobject("struct.error");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
482 dictinsert(d, "error", StructError);
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
483
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
484 /* Check for errors */
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
485 if (err_occurred())
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
486 fatal("can't initialize module struct");
7d3a053c6765 struct: pack/unpack binary structs; fcntl: fcntl(), ioctl().
Guido van Rossum <guido@python.org>
parents:
diff changeset
487 }