annotate librftab/rdcommon.c @ 926:6a0aa8d36d06

rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents a0f79bba0ad8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * This C file is not a compilation unit in itself, but is the common piece
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3 * (a set of static variables and functions) included in the librftab modules
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4 * responsible for reading different kinds of ASCII tables.
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5 */
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6
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7 #define MAX_FIELDS_PER_LINE 64
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8
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9 static char *filename;
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10 static FILE *rdfile;
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11 static unsigned lineno;
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12 static char linebuf[256], *line_fields[MAX_FIELDS_PER_LINE];
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13 static unsigned line_nfields, line_field_ptr;
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14
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15 static int
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16 read_line()
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17 {
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18 char *cp;
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19
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20 if (!fgets(linebuf, sizeof linebuf, rdfile))
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21 return(0);
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22 lineno++;
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23 cp = linebuf;
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24 for (line_nfields = 0; ; ) {
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25 while (isspace(*cp))
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26 cp++;
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27 if (*cp == '\0' || *cp == '#')
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28 break;
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29 if (line_nfields >= MAX_FIELDS_PER_LINE) {
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30 printf("%s line %d: too many fields on one line\n",
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31 filename, lineno);
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32 return(-1);
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33 }
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34 line_fields[line_nfields++] = cp;
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35 while (*cp && !isspace(*cp))
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36 cp++;
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37 if (*cp)
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38 *cp++ = '\0';
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39 }
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40 return(1);
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41 }
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42
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43 static
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44 get_field(retp)
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45 char **retp;
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46 {
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47 int rc;
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48
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49 if (line_field_ptr < line_nfields) {
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50 *retp = line_fields[line_field_ptr++];
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51 return(1);
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52 }
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53 do {
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54 rc = read_line();
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55 if (rc <= 0)
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56 return(rc);
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57 } while (!line_nfields);
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58 *retp = line_fields[0];
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59 line_field_ptr = 1;
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60 return(1);
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61 }