1 | /* |
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2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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3 | * unrestricted use provided that this legend is included on all tape |
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4 | * media and as a part of the software program in whole or part. Users |
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5 | * may copy or modify Sun RPC without charge, but are not authorized |
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6 | * to license or distribute it to anyone else except as part of a product or |
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7 | * program developed by the user. |
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8 | * |
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9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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12 | * |
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13 | * Sun RPC is provided with no support and without any obligation on the |
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14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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15 | * modification or enhancement. |
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16 | * |
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17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
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18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
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19 | * OR ANY PART THEREOF. |
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20 | * |
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21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
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22 | * or profits or other special, indirect and consequential damages, even if |
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23 | * Sun has been advised of the possibility of such damages. |
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24 | * |
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25 | * Sun Microsystems, Inc. |
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26 | * 2550 Garcia Avenue |
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27 | * Mountain View, California 94043 |
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28 | */ |
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29 | |
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30 | #if defined(LIBC_SCCS) && !defined(lint) |
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31 | /*static char *sccsid = "from: @(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";*/ |
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32 | /*static char *sccsid = "from: @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC";*/ |
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33 | static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_stdio.c,v 1.7 1999/08/28 00:02:56 peter Exp $"; |
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34 | #endif |
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35 | |
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36 | /* |
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37 | * xdr_stdio.c, XDR implementation on standard i/o file. |
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38 | * |
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39 | * Copyright (C) 1984, Sun Microsystems, Inc. |
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40 | * |
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41 | * This set of routines implements a XDR on a stdio stream. |
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42 | * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes |
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43 | * from the stream. |
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44 | */ |
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45 | |
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46 | #ifdef HAVE_CONFIG_H |
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47 | #include "config.h" |
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48 | #endif |
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49 | |
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50 | #include <rpc/types.h> |
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51 | #include <stdio.h> |
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52 | #include <rpc/xdr.h> |
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53 | #include <netinet/in.h> |
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54 | |
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55 | static bool_t xdrstdio_getlong(XDR *xdrs, long *lp); |
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56 | static bool_t xdrstdio_putlong(XDR *xdrs, const long *lp); |
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57 | static bool_t xdrstdio_getbytes(XDR *xdrs, caddr_t addr, u_int len); |
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58 | static bool_t xdrstdio_putbytes(XDR *xdrs, const char *addr, u_int len); |
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59 | static u_int xdrstdio_getpos(XDR *xdrs); |
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60 | static bool_t xdrstdio_setpos(XDR *xdrs, u_int pos); |
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61 | static int32_t *xdrstdio_inline(XDR *xdrs, u_int len); |
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62 | static void xdrstdio_destroy(XDR *); |
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63 | |
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64 | /* |
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65 | * Ops vector for stdio type XDR |
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66 | */ |
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67 | static struct xdr_ops xdrstdio_ops = { |
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68 | xdrstdio_getlong, /* deseraialize a long int */ |
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69 | xdrstdio_putlong, /* seraialize a long int */ |
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70 | xdrstdio_getbytes, /* deserialize counted bytes */ |
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71 | xdrstdio_putbytes, /* serialize counted bytes */ |
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72 | xdrstdio_getpos, /* get offset in the stream */ |
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73 | xdrstdio_setpos, /* set offset in the stream */ |
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74 | xdrstdio_inline, /* prime stream for inline macros */ |
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75 | xdrstdio_destroy /* destroy stream */ |
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76 | }; |
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77 | |
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78 | /* |
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79 | * Initialize a stdio xdr stream. |
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80 | * Sets the xdr stream handle xdrs for use on the stream file. |
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81 | * Operation flag is set to op. |
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82 | */ |
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83 | void |
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84 | xdrstdio_create( |
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85 | XDR *xdrs, |
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86 | FILE *file, |
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87 | enum xdr_op op) |
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88 | { |
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89 | |
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90 | xdrs->x_op = op; |
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91 | xdrs->x_ops = &xdrstdio_ops; |
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92 | xdrs->x_private = (caddr_t)file; |
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93 | xdrs->x_handy = 0; |
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94 | xdrs->x_base = 0; |
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95 | } |
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96 | |
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97 | /* |
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98 | * Destroy a stdio xdr stream. |
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99 | * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. |
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100 | */ |
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101 | static void |
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102 | xdrstdio_destroy( |
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103 | XDR *xdrs) |
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104 | { |
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105 | (void)fflush((FILE *)xdrs->x_private); |
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106 | /* xx should we close the file ?? */ |
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107 | } |
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108 | |
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109 | static bool_t |
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110 | xdrstdio_getlong( |
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111 | XDR *xdrs, |
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112 | long *lp) |
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113 | { |
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114 | |
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115 | if (fread((caddr_t)lp, sizeof(int32_t), 1, |
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116 | (FILE *)xdrs->x_private) != 1) |
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117 | return (FALSE); |
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118 | *lp = (long)ntohl((int32_t)*lp); |
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119 | return (TRUE); |
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120 | } |
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121 | |
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122 | static bool_t |
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123 | xdrstdio_putlong( |
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124 | XDR *xdrs, |
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125 | const long *lp) |
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126 | { |
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127 | |
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128 | long mycopy = (long)htonl((int32_t)*lp); |
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129 | |
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130 | if (fwrite((caddr_t)&mycopy, sizeof(int32_t), 1, |
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131 | (FILE *)xdrs->x_private) != 1) |
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132 | return (FALSE); |
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133 | return (TRUE); |
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134 | } |
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135 | |
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136 | static bool_t |
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137 | xdrstdio_getbytes( |
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138 | XDR *xdrs, |
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139 | caddr_t addr, |
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140 | u_int len ) |
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141 | { |
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142 | |
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143 | if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) |
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144 | return (FALSE); |
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145 | return (TRUE); |
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146 | } |
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147 | |
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148 | static bool_t |
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149 | xdrstdio_putbytes( |
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150 | XDR *xdrs, |
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151 | const char *addr, |
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152 | u_int len) |
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153 | { |
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154 | |
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155 | if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) |
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156 | return (FALSE); |
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157 | return (TRUE); |
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158 | } |
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159 | |
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160 | static u_int |
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161 | xdrstdio_getpos( |
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162 | XDR *xdrs) |
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163 | { |
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164 | |
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165 | return ((u_int) ftell((FILE *)xdrs->x_private)); |
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166 | } |
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167 | |
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168 | static bool_t |
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169 | xdrstdio_setpos( |
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170 | XDR *xdrs, |
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171 | u_int pos) |
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172 | { |
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173 | |
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174 | return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? |
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175 | FALSE : TRUE); |
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176 | } |
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177 | |
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178 | static int32_t * |
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179 | xdrstdio_inline( |
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180 | XDR *xdrs, |
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181 | u_int len) |
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182 | { |
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183 | |
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184 | /* |
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185 | * Must do some work to implement this: must insure |
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186 | * enough data in the underlying stdio buffer, |
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187 | * that the buffer is aligned so that we can indirect through a |
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188 | * long *, and stuff this pointer in xdrs->x_buf. Doing |
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189 | * a fread or fwrite to a scratch buffer would defeat |
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190 | * most of the gains to be had here and require storage |
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191 | * management on this buffer, so we don't do this. |
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192 | */ |
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193 | return (NULL); |
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194 | } |
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