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5222 | serge | 1 | /* sb.h - header file for string buffer manipulation routines |
6324 | serge | 2 | Copyright (C) 1994-2015 Free Software Foundation, Inc. |
5222 | serge | 3 | |
4 | Written by Steve and Judy Chamberlain of Cygnus Support, |
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5 | sac@cygnus.com |
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6 | |||
7 | This file is part of GAS, the GNU Assembler. |
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8 | |||
9 | GAS is free software; you can redistribute it and/or modify |
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10 | it under the terms of the GNU General Public License as published by |
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11 | the Free Software Foundation; either version 3, or (at your option) |
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12 | any later version. |
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13 | |||
14 | GAS is distributed in the hope that it will be useful, |
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15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | GNU General Public License for more details. |
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18 | |||
19 | You should have received a copy of the GNU General Public License |
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20 | along with GAS; see the file COPYING. If not, write to the Free |
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21 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
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22 | 02110-1301, USA. */ |
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23 | |||
24 | #ifndef SB_H |
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25 | |||
26 | #define SB_H |
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27 | |||
28 | /* String blocks |
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29 | |||
30 | I had a couple of choices when deciding upon this data structure. |
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31 | gas uses null terminated strings for all its internal work. This |
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32 | often means that parts of the program that want to examine |
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33 | substrings have to manipulate the data in the string to do the |
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34 | right thing (a common operation is to single out a bit of text by |
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35 | saving away the character after it, nulling it out, operating on |
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36 | the substring and then replacing the character which was under the |
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37 | null). This is a pain and I remember a load of problems that I had with |
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38 | code in gas which almost got this right. Also, it's harder to grow and |
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39 | allocate null terminated strings efficiently. |
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40 | |||
41 | Obstacks provide all the functionality needed, but are too |
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42 | complicated, hence the sb. |
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43 | |||
44 | An sb is allocated by the caller. */ |
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45 | |||
46 | typedef struct sb |
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47 | { |
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48 | char *ptr; /* Points to the current block. */ |
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49 | size_t len; /* How much is used. */ |
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50 | size_t max; /* The maximum length. */ |
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51 | } |
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52 | sb; |
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53 | |||
54 | extern void sb_new (sb *); |
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55 | extern void sb_build (sb *, size_t); |
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56 | extern void sb_kill (sb *); |
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57 | extern void sb_add_sb (sb *, sb *); |
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58 | extern void sb_scrub_and_add_sb (sb *, sb *); |
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59 | extern void sb_reset (sb *); |
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60 | extern void sb_add_char (sb *, size_t); |
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61 | extern void sb_add_string (sb *, const char *); |
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62 | extern void sb_add_buffer (sb *, const char *, size_t); |
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63 | extern char *sb_terminate (sb *); |
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64 | extern size_t sb_skip_white (size_t, sb *); |
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65 | extern size_t sb_skip_comma (size_t, sb *); |
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66 | |||
67 | /* Actually in input-scrub.c. */ |
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68 | extern void input_scrub_include_sb (sb *, char *, int); |
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69 | |||
70 | #endif /* SB_H */ |