108 lines
1.7 KiB
C
108 lines
1.7 KiB
C
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#include <u.h>
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#include <libc.h>
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static char qsep[] = " \t\r\n";
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static char*
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qtoken(char *s, char *sep)
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{
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int quoting;
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char *t;
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quoting = 0;
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t = s; /* s is output string, t is input string */
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while(*t!='\0' && (quoting || utfrune(sep, *t)==nil)){
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if(*t != '\''){
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*s++ = *t++;
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continue;
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}
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/* *t is a quote */
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if(!quoting){
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quoting = 1;
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t++;
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continue;
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}
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/* quoting and we're on a quote */
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if(t[1] != '\''){
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/* end of quoted section; absorb closing quote */
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t++;
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quoting = 0;
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continue;
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}
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/* doubled quote; fold one quote into two */
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t++;
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*s++ = *t++;
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}
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if(*s != '\0'){
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*s = '\0';
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if(t == s)
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t++;
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}
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return t;
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}
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static char*
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etoken(char *t, char *sep)
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{
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int quoting;
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/* move to end of next token */
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quoting = 0;
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while(*t!='\0' && (quoting || utfrune(sep, *t)==nil)){
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if(*t != '\''){
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t++;
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continue;
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}
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/* *t is a quote */
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if(!quoting){
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quoting = 1;
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t++;
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continue;
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}
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/* quoting and we're on a quote */
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if(t[1] != '\''){
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/* end of quoted section; absorb closing quote */
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t++;
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quoting = 0;
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continue;
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}
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/* doubled quote; fold one quote into two */
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t += 2;
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}
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return t;
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}
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int
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gettokens(char *s, char **args, int maxargs, char *sep)
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{
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int nargs;
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for(nargs=0; nargs<maxargs; nargs++){
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while(*s!='\0' && utfrune(sep, *s)!=nil)
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*s++ = '\0';
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if(*s == '\0')
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break;
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args[nargs] = s;
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s = etoken(s, sep);
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}
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return nargs;
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}
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int
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tokenize(char *s, char **args, int maxargs)
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{
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int nargs;
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for(nargs=0; nargs<maxargs; nargs++){
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while(*s!='\0' && utfrune(qsep, *s)!=nil)
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s++;
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if(*s == '\0')
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break;
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args[nargs] = s;
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s = qtoken(s, qsep);
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}
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return nargs;
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}
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