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b2/: move variable-length strings to vstring.[ch], for sharing

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This commit is contained in:
Werner Almesberger 2012-05-20 20:53:34 -03:00
parent 8e6357f4fa
commit 4e39ca2e31
4 changed files with 64 additions and 28 deletions
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2
b2/Makefile
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@ -14,7 +14,7 @@ SHELL = /bin/bash
CFLAGS = -g -Wall $(shell pkg-config --cflags glib-2.0)
SLOPPY = -Wno-unused -Wno-implicit-function-declaration
OBJS = boom.o chr.o comp.o db.o dump.o eval.o param.o subex.o subst.o util.o \
lex.yy.o y.tab.o
vstring.o lex.yy.o y.tab.o
LDLIBS = -lfl $(shell pkg-config --libs glib-2.0)
YACC = bison -y

28
b2/subex.c
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@ -17,6 +17,7 @@
#include <regex.h>
#include "util.h"
#include "vstring.h"
#include "lang.h"
#include "subst.h"
#include "subex.h"
@ -31,33 +32,6 @@ static const char *fn = NULL, *f[FIELDS];
static struct subst jump_end;
static void append_n(char **res, int *res_len, const char *s, int len)
{
if (!len)
return;
*res = realloc(*res, *res_len+len+1);
if (!*res)
abort();
memcpy(*res+*res_len, s, len);
*res_len += len;
(*res)[*res_len] = 0;
}
static void append(char **res, int *res_len, const char *s)
{
append_n(res, res_len, s, strlen(s));
}
#if 0
static void append_char(char **res, int *res_len, char c)
{
append_n(res, res_len, &c, 1);
}
#endif
/*
* TODO: decide what to do with units
*/

37
b2/vstring.c Normal file
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@ -0,0 +1,37 @@
/*
* vstring.c - Variable-length strings
*
* Copyright 2012 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <stdlib.h>
#include <string.h>
#include "vstring.h"
void append_n(char **res, int *res_len, const char *s, int len)
{
if (!len)
return;
if (!*res)
*res_len = 0;
*res = realloc(*res, *res_len+len+1);
if (!*res)
abort();
memcpy(*res+*res_len, s, len);
*res_len += len;
(*res)[*res_len] = 0;
}
void append(char **res, int *res_len, const char *s)
{
append_n(res, res_len, s, strlen(s));
}

25
b2/vstring.h Normal file
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@ -0,0 +1,25 @@
/*
* vstring.h - Variable-length strings
*
* Copyright 2012 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef VSTRING_H
#define VSTRING_H
void append_n(char **res, int *res_len, const char *s, int len);
void append(char **res, int *res_len, const char *s);
static inline void append_char(char **res, int *res_len, char c)
{
append_n(res, res_len, &c, 1);
}
#endif /* !VSTRING_H */