1 | #include "config.h"
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2 | #include "f2c.h"
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3 | #include "fio.h"
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4 | #include "fmt.h"
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5 |
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6 | int
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7 | y_rsk (void)
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8 | {
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9 | if (f__curunit->uend || f__curunit->url <= f__recpos
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10 | || f__curunit->url == 1)
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11 | return 0;
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12 | do
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13 | {
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14 | getc (f__cf);
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15 | }
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16 | while (++f__recpos < f__curunit->url);
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17 | return 0;
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18 | }
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19 |
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20 | int
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21 | y_getc (void)
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22 | {
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23 | int ch;
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24 | if (f__curunit->uend)
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25 | return (-1);
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26 | if ((ch = getc (f__cf)) != EOF)
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27 | {
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28 | f__recpos++;
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29 | if (f__curunit->url >= f__recpos || f__curunit->url == 1)
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30 | return (ch);
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31 | else
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32 | return (' ');
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33 | }
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34 | if (feof (f__cf))
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35 | {
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36 | f__curunit->uend = 1;
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37 | errno = 0;
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38 | return (-1);
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39 | }
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40 | err (f__elist->cierr, errno, "readingd");
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41 | }
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42 |
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43 | static int
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44 | y_rev (void)
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45 | {
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46 | if (f__recpos < f__hiwater)
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47 | f__recpos = f__hiwater;
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48 | if (f__curunit->url > 1)
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49 | while (f__recpos < f__curunit->url)
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50 | (*f__putn) (' ');
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51 | if (f__recpos)
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52 | f__putbuf (0);
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53 | f__recpos = 0;
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54 | return (0);
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55 | }
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56 |
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57 | static int
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58 | y_err (void)
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59 | {
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60 | err (f__elist->cierr, 110, "dfe");
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61 | }
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62 |
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63 | static int
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64 | y_newrec (void)
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65 | {
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66 | y_rev ();
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67 | f__hiwater = f__cursor = 0;
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68 | return (1);
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69 | }
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70 |
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71 | int
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72 | c_dfe (cilist * a)
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73 | {
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74 | f__sequential = 0;
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75 | f__formatted = f__external = 1;
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76 | f__elist = a;
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77 | f__cursor = f__scale = f__recpos = 0;
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78 | f__curunit = &f__units[a->ciunit];
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79 | if (a->ciunit > MXUNIT || a->ciunit < 0)
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80 | err (a->cierr, 101, "startchk");
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81 | if (f__curunit->ufd == NULL && fk_open (DIR, FMT, a->ciunit))
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82 | err (a->cierr, 104, "dfe");
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83 | f__cf = f__curunit->ufd;
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84 | if (!f__curunit->ufmt)
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85 | err (a->cierr, 102, "dfe");
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86 | if (!f__curunit->useek)
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87 | err (a->cierr, 104, "dfe");
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88 | f__fmtbuf = a->cifmt;
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89 | if (a->cirec <= 0)
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90 | err (a->cierr, 130, "dfe");
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91 | FSEEK (f__cf, (off_t) f__curunit->url * (a->cirec - 1), SEEK_SET);
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92 | f__curunit->uend = 0;
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93 | return (0);
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94 | }
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95 |
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96 | integer
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97 | s_rdfe (cilist * a)
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98 | {
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99 | int n;
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100 | if (f__init != 1)
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101 | f_init ();
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102 | f__init = 3;
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103 | f__reading = 1;
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104 | if ((n = c_dfe (a)))
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105 | return (n);
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106 | if (f__curunit->uwrt && f__nowreading (f__curunit))
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107 | err (a->cierr, errno, "read start");
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108 | f__getn = y_getc;
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109 | f__doed = rd_ed;
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110 | f__doned = rd_ned;
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111 | f__dorevert = f__donewrec = y_err;
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112 | f__doend = y_rsk;
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113 | if (pars_f (f__fmtbuf) < 0)
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114 | err (a->cierr, 100, "read start");
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115 | fmt_bg ();
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116 | return (0);
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117 | }
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118 |
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119 | integer
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120 | s_wdfe (cilist * a)
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121 | {
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122 | int n;
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123 | if (f__init != 1)
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124 | f_init ();
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125 | f__init = 3;
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126 | f__reading = 0;
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127 | if ((n = c_dfe (a)))
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128 | return (n);
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129 | if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit))
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130 | err (a->cierr, errno, "startwrt");
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131 | f__putn = x_putc;
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132 | f__doed = w_ed;
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133 | f__doned = w_ned;
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134 | f__dorevert = y_err;
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135 | f__donewrec = y_newrec;
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136 | f__doend = y_rev;
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137 | if (pars_f (f__fmtbuf) < 0)
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138 | err (a->cierr, 100, "startwrt");
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139 | fmt_bg ();
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140 | return (0);
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141 | }
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142 |
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143 | integer
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144 | e_rdfe (void)
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145 | {
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146 | f__init = 1;
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147 | en_fio ();
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148 | return (0);
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149 | }
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150 |
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151 | integer
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152 | e_wdfe (void)
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153 | {
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154 | f__init = 1;
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155 | return en_fio ();
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156 | }
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