src/sgestring.c

/*
 * Copyright (c) 2007 Heiko Irrgang
 *
 * The license and distribution terms for this file may be
 * found in the file COPYING in this distribution or at
 * http://93-interactive.com/cms/products/software/sdl-game-engine/license/
 */

#include <sge.h>

int sgeCharIsWhitespace(char c) {
        if (
                (c==' ') ||
                (c=='\t') ||
                (c=='\n') ||
                (c=='\v') ||
                (c=='\a') ||
                (c=='\f') ||
                (c=='\r')
           ) {
                return YES;
        }
        return NO;
}

char *sgeTrim(char *str) {
        char *ret=NULL;
        int cont=1;
        int i=0;
        int start=0;
        int end=0;
        int len=strlen(str);

        while ( (cont) && (i<len-1) ) {
                if (!sgeCharIsWhitespace(str[i])) {
                        start=i;
                        cont=0;
                }
                i++;
        }

        cont=1;
        i=len-1;
        while ( (cont) && (i>=0) ) {
                if (!sgeCharIsWhitespace(str[i])) {
                        end=i;
                        cont=0;
                }
                i--;
        }

        if (end<=start) {
                sgeNew(ret, char);
                return ret;
        }

        len=end-start+1;
        sgeMalloc(ret, char, len+1);
        strncpy(ret, str+start, len);
        return ret;
}

char *sgeLower(char *str) {
        char *ret=strdup(str);
        char *c=ret;
        for ( ; *c; ++c) *c = tolower(*c);
        return ret;
}

char *sgeUpper(char *str) {
        char *ret=strdup(str);
        char *c=ret;
        for ( ; *c; ++c) *c = toupper(*c);
        return ret;
}

static char *sgeConfigPartFromString(char *str, int part) {
        char *wc=strdup(str);
        char *eq=strchr(wc, '=');
        char *p=NULL;

        if (eq==NULL) {
                sgeFree(wc);
                return NULL;
        }

        eq[0]=0;
        if (part==0) {
                p=sgeTrim(wc);
        } else {
                p=sgeTrim(eq+1);
        }
        sgeFree(wc);
        return p;
}

char *sgeConfigNameFromString(char *str) {
        return sgeConfigPartFromString(str, 0);
}

char *sgeConfigValueFromString(char *str) {
        return sgeConfigPartFromString(str, 1);
}