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New module strstack

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2904 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2004-03-07 22:09:06 +00:00
parent 7006e5d1f2
commit 9d439d9dd2
6 changed files with 198 additions and 5 deletions
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85
src/common/strstack.c Normal file
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/*****************************************************************************/
/* */
/* strstack.c */
/* */
/* String stack used for program settings */
/* */
/* */
/* */
/* (C) 2004 Ullrich von Bassewitz */
/* R<>merstra<72>e 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
/* common */
#include "check.h"
#include "strstack.h"
#include "xmalloc.h"
/*****************************************************************************/
/* Code */
/*****************************************************************************/
const char* SS_Get (const StrStack* S)
/* Get the value on top of a string stack */
{
CHECK (S->Count > 0);
return S->Stack[S->Count-1];
}
void SS_Set (StrStack* S, const char* Val)
/* Set the value on top of a string stack */
{
CHECK (S->Count > 0);
xfree (S->Stack[S->Count-1]);
S->Stack[S->Count-1] = xstrdup (Val);
}
void SS_Drop (StrStack* S)
/* Drop a value from a string stack */
{
CHECK (S->Count > 1);
xfree (S->Stack[--S->Count]);
}
void SS_Push (StrStack* S, const char* Val)
/* Push a value onto a string stack */
{
CHECK (S->Count < sizeof (S->Stack) / sizeof (S->Stack[0]));
S->Stack[S->Count++] = xstrdup (Val);
}