122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/* This file is part of flex.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE
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*/
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/*
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* Those are utility functions that are reimplementations of some standard
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* C functions for strings manipulation, but using YY_CHAR macro instead of
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* raw char type.
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*
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* These functions are only used in some test suites, not in the flex itself.
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*/
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#pragma once
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "strutils.h"
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size_t yy_utils_strlen(YY_CHAR* str)
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{
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YY_CHAR *ptr = str;
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while(*ptr != 0) ptr++;
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return ptr-str;
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}
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YY_CHAR* yy_utils_strcpy(YY_CHAR *destination, const YY_CHAR *source)
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{
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YY_CHAR *ptr = destination;
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while((*destination++ = *source++));
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return ptr;
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}
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int yy_utils_strcmp(YY_CHAR *str1, YY_CHAR *str2)
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{
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while(*str1 == *str2++)
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if(*str1++ == 0)
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return 0;
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return *str1 - *(str2-1);
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}
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YY_CHAR* yy_utils_strdup(YY_CHAR* s1)
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{
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YY_CHAR* s2 = (YY_CHAR*)malloc((yy_utils_strlen(s1)+1)*sizeof(YY_CHAR));
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yy_utils_strcpy(s2, s1);
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return s2;
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}
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bool yy_utils_isany(YY_CHAR ch, const YY_CHAR *set, size_t set_size) {
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size_t i;
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for(i = 0; i < set_size; ++i)
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if(set[i] == ch)
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return true;
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return false;
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}
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bool yy_utils_isspace(YY_CHAR ch) {
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static const YY_CHAR set[] = {' ', '\r', '\n', '\t'};
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return yy_utils_isany(ch, set, sizeof(set)/sizeof(set[0]));
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}
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bool yy_utils_isupper(YY_CHAR ch) {
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static const YY_CHAR set[] = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
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return yy_utils_isany(ch, set, sizeof(set)/sizeof(set[0]));
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}
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bool yy_utils_islower(YY_CHAR ch) {
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static const YY_CHAR set[] = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
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return yy_utils_isany(ch, set, sizeof(set)/sizeof(set[0]));
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}
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bool yy_utils_isdigit(YY_CHAR ch) {
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static const YY_CHAR set[] = {'0','1','2','3','4','5','6','7','8','9'};
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return yy_utils_isany(ch, set, sizeof(set)/sizeof(set[0]));
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}
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long int yy_utils_strtol(const YY_CHAR *str, YY_CHAR **endptr, int base)
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{
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while(yy_utils_isspace(*str)) str++;
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bool neg = false;
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if(*str == '-') neg = true, str++;
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else if(*str == '+') str++;
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YY_CHAR ch;
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long int n = 0;
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while((ch = *str++)) {
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long int v = -1;
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if(yy_utils_isdigit(ch))
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v = ch-'0';
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else if(yy_utils_isupper(ch))
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v = ch-'A'+10;
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else if(yy_utils_islower(ch))
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v = ch-'a'+10;
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else
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break;
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if(v >= base)
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break;
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n *= base;
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n += v;
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}
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if(endptr)
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*endptr = (YY_CHAR*)str-1;
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if(neg)
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n = -n;
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return n;
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} |