HTK命令行参数处理

HTK的各种命令函数都会带有大量的参数，这些参数有些是可选的，有些是必选的。一般情况下我们可以通过getopt()函数+switch语句来实现，但HTK没有这样做，它通过顺序读取argv中的内容来实现参数的输入。

 

用于训练的工具HERest使用方法如下，包含了一些可选参数和必须参数：

 

HERest -A -T 1 -I lab -H MMF -M  hmmlist

 

下面的代码做了简化处理 

 

 #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> static int argcount; /* total args = argc */ static int nextarg=1; /* next arg to return in GetxxxArg */ static char **arglist; /* ----------- Command Line Argument Handling ------------ */ typedef enum {FALSE=0, TRUE=1} Boolean; typedef enum {SWITCHARG, STRINGARG, INTARG, FLOATARG, NOARG} ArgKind; void InitShell(int argc, char *argv[]) { int i; argcount = argc; arglist = (char **) malloc(argc*sizeof(char *)); for (i=0;i<argc;i++){ arglist[i] = argv[i]; } } /* NumHead: returns TRUE if the first two chars of a string are ('+'|'-') digit | digit */ Boolean NumHead(char *s) { if (*s!='/0') if (isdigit((int) *s)) return TRUE; if (((*s=='+') || (*s=='-')) && (isdigit((int) *(s+1)))) return TRUE; return FALSE; } int NumArgs(void) { return argcount-nextarg; } char * GetNextArg(Boolean step) { char *s; if (argcount>nextarg) { s = arglist[nextarg]; } if (step) { ++nextarg; } return s; } /* EXPORT->NextArg;Kind of next argument */ ArgKind NextArg(void) { char *s,*p; if (NumArgs() == 0) return NOARG; s = GetNextArg(FALSE); if ( NumHead(s)) { strtod(s,&p); if ( p==NULL || *p=='/0' ) { if (strchr(s,'.') == NULL) return INTARG; else return FLOATARG; } } if (*s=='-') return SWITCHARG; return STRINGARG; } char *GetStrArg(void) { char *s; if (NextArg() != STRINGARG ){ printf("%s is not string/n",GetNextArg(FALSE)); exit(1); } return GetNextArg(TRUE); } char *GetSwtArg(void) { if (NextArg() != SWITCHARG ){ printf("%s is not switch/n",GetNextArg(FALSE)); exit(1); } return GetNextArg(TRUE)+1; } int GetIntArg(void) { int i; char *s; if (NextArg() != INTARG ){ printf("%s is not int/n",GetNextArg(FALSE)); exit(1); } s = GetNextArg(TRUE); if (sscanf(s,"%i",&i) != 1){ ; } return i; } float GetFltArg(void) { int k = NextArg(); if (k != INTARG && k != FLOATARG) { printf("%s is not float/n",GetNextArg(FALSE)); exit(1); } return atof(GetNextArg(TRUE)); } void ReportUsage(void) { printf("/n USAGE: HERest [options] hmmList .../n/n"); printf(" Option /n/n"); printf(" -A Command Line Printed /n"); printf(" -H mmf LOAD HMM macro file mmf ./MMF/n"); printf(" -w f set mix weight floor to f*MINMI 0.0/n"); printf(" -m N set min examples needed per model 3/n"); } int main(int argc, char *argv[]) { if( argc == 1 ) { ReportUsage(); exit(1); } InitShell(argc, argv); char *s; while (NextArg() == SWITCHARG) { s = GetSwtArg(); if (strlen(s)!=1) { printf("switch must be single letter/n"); exit(1); } switch(s[0]) { case 'A': printf("-A/n"); break; case 'H': printf("-H/t%s/n",GetStrArg()); break; case 'w': printf("-w/t%f/n",GetFltArg()); break; case 'm': printf("-m/t%d/n",GetIntArg()); break; default: printf("unkown switch %s/n",s); exit(1); } } if (NextArg() != STRINGARG) { printf("hmmlist expected/n"); exit(1); } printf("/t%s/n",GetStrArg()); exit(0); }

 

 

上述方法要求可选参数必须放置在必选参数之前，程序在读取必选参数之后将不会再对命令行参数做处理。