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2999
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1 /* fn.h: arbitrarily long filenames (or just strings). |
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2 |
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3 Copyright (C) 1993 Karl Berry. |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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18 |
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19 #ifndef KPATHSEA_FN_H |
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20 #define KPATHSEA_FN_H |
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21 |
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22 #include <kpathsea/c-proto.h> |
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23 #include <kpathsea/types.h> |
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24 |
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25 /* Arbitrarily long filenames; it's inconvenient to use obstacks here, |
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26 because we want to maintain a null terminator. Also used for |
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27 dynamically growing strings even when the null byte isn't necessary, |
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28 e.g., in `variable.c', since I don't want to pass obstacks around |
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29 everywhere, and one can't free parts of an obstack arbitrarily. */ |
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30 |
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31 typedef struct |
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32 { |
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33 string str; |
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34 unsigned allocated; |
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35 unsigned length; /* includes the terminating null byte, if any */ |
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36 } fn_type; |
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37 |
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38 #define FN_STRING(fn) ((fn).str) |
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39 #define FN_ALLOCATED(fn) ((fn).allocated) |
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40 #define FN_LENGTH(fn) ((fn).length) |
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41 |
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42 |
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43 /* Create a new empty fn. */ |
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44 extern fn_type fn_init P1H(void); |
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45 |
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46 /* Create a new fn from the first LEN characters from S and a null. */ |
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47 extern fn_type fn_copy0 P2H(const_string s, unsigned len); |
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48 |
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49 /* Free what's been allocated. Can also just free the string if it's |
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50 been extracted out. Fatal error if nothing allocated in F. */ |
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51 extern void fn_free P1H(fn_type *f); |
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52 |
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53 /* Append the character C to the fn F. Don't append trailing null. */ |
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54 extern void fn_1grow P2H(fn_type *f, char c); |
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55 |
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56 /* Append LENGTH bytes from SOURCE to F. */ |
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57 extern void fn_grow P3H(fn_type *f, address source, unsigned length); |
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58 |
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59 /* Concatenate the component S to the fn F. Assumes string currently in |
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60 F is null terminated. */ |
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61 extern void fn_str_grow P2H(fn_type *f, const_string s); |
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62 |
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63 /* Add a null to F's string at position LOC, and update its length. |
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64 Fatal error if LOC is past the end of the string. */ |
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65 extern void fn_shrink_to P2H(fn_type *f, unsigned loc); |
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66 |
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67 #endif /* not KPATHSEA_FN_H */ |
