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 | #include <rpc/types.h> |
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47 | #include <stdio.h> |
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48 | #include <rpc/xdr.h> |
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49 | #include <netinet/in.h> |
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50 | |
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51 | static bool_t xdrstdio_getlong(); |
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52 | static bool_t xdrstdio_putlong(); |
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53 | static bool_t xdrstdio_getbytes(); |
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54 | static bool_t xdrstdio_putbytes(); |
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55 | static u_int xdrstdio_getpos(); |
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56 | static bool_t xdrstdio_setpos(); |
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57 | static int32_t *xdrstdio_inline(); |
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58 | static void xdrstdio_destroy(); |
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59 | |
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60 | /* |
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61 | * Ops vector for stdio type XDR |
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62 | */ |
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63 | static struct xdr_ops xdrstdio_ops = { |
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64 | xdrstdio_getlong, /* deseraialize a long int */ |
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65 | xdrstdio_putlong, /* seraialize a long int */ |
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66 | xdrstdio_getbytes, /* deserialize counted bytes */ |
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67 | xdrstdio_putbytes, /* serialize counted bytes */ |
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68 | xdrstdio_getpos, /* get offset in the stream */ |
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69 | xdrstdio_setpos, /* set offset in the stream */ |
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70 | xdrstdio_inline, /* prime stream for inline macros */ |
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71 | xdrstdio_destroy /* destroy stream */ |
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72 | }; |
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73 | |
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74 | /* |
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75 | * Initialize a stdio xdr stream. |
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76 | * Sets the xdr stream handle xdrs for use on the stream file. |
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77 | * Operation flag is set to op. |
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78 | */ |
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79 | void |
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80 | xdrstdio_create(xdrs, file, op) |
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81 | register XDR *xdrs; |
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82 | FILE *file; |
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83 | enum xdr_op op; |
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84 | { |
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85 | |
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86 | xdrs->x_op = op; |
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87 | xdrs->x_ops = &xdrstdio_ops; |
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88 | xdrs->x_private = (caddr_t)file; |
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89 | xdrs->x_handy = 0; |
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90 | xdrs->x_base = 0; |
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91 | } |
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92 | |
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93 | /* |
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94 | * Destroy a stdio xdr stream. |
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95 | * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. |
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96 | */ |
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97 | static void |
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98 | xdrstdio_destroy(xdrs) |
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99 | register XDR *xdrs; |
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100 | { |
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101 | (void)fflush((FILE *)xdrs->x_private); |
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102 | /* xx should we close the file ?? */ |
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103 | } |
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104 | |
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105 | static bool_t |
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106 | xdrstdio_getlong(xdrs, lp) |
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107 | XDR *xdrs; |
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108 | register long *lp; |
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109 | { |
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110 | |
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111 | if (fread((caddr_t)lp, sizeof(int32_t), 1, |
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112 | (FILE *)xdrs->x_private) != 1) |
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113 | return (FALSE); |
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114 | *lp = (long)ntohl((int32_t)*lp); |
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115 | return (TRUE); |
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116 | } |
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117 | |
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118 | static bool_t |
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119 | xdrstdio_putlong(xdrs, lp) |
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120 | XDR *xdrs; |
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121 | long *lp; |
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122 | { |
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123 | |
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124 | long mycopy = (long)htonl((int32_t)*lp); |
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125 | |
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126 | if (fwrite((caddr_t)&mycopy, sizeof(int32_t), 1, |
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127 | (FILE *)xdrs->x_private) != 1) |
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128 | return (FALSE); |
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129 | return (TRUE); |
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130 | } |
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131 | |
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132 | static bool_t |
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133 | xdrstdio_getbytes(xdrs, addr, len) |
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134 | XDR *xdrs; |
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135 | caddr_t addr; |
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136 | u_int len; |
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137 | { |
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138 | |
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139 | if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) |
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140 | return (FALSE); |
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141 | return (TRUE); |
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142 | } |
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143 | |
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144 | static bool_t |
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145 | xdrstdio_putbytes(xdrs, addr, len) |
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146 | XDR *xdrs; |
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147 | caddr_t addr; |
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148 | u_int len; |
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149 | { |
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150 | |
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151 | if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) |
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152 | return (FALSE); |
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153 | return (TRUE); |
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154 | } |
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155 | |
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156 | static u_int |
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157 | xdrstdio_getpos(xdrs) |
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158 | XDR *xdrs; |
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159 | { |
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160 | |
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161 | return ((u_int) ftell((FILE *)xdrs->x_private)); |
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162 | } |
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163 | |
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164 | static bool_t |
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165 | xdrstdio_setpos(xdrs, pos) |
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166 | XDR *xdrs; |
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167 | u_int pos; |
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168 | { |
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169 | |
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170 | return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? |
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171 | FALSE : TRUE); |
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172 | } |
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173 | |
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174 | static int32_t * |
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175 | xdrstdio_inline(xdrs, len) |
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176 | XDR *xdrs; |
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177 | u_int len; |
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178 | { |
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179 | |
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180 | /* |
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181 | * Must do some work to implement this: must insure |
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182 | * enough data in the underlying stdio buffer, |
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183 | * that the buffer is aligned so that we can indirect through a |
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184 | * long *, and stuff this pointer in xdrs->x_buf. Doing |
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185 | * a fread or fwrite to a scratch buffer would defeat |
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186 | * most of the gains to be had here and require storage |
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187 | * management on this buffer, so we don't do this. |
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188 | */ |
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189 | return (NULL); |
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190 | } |
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