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      1 /* -*- buffer-read-only: t -*- vi: set ro: */
      2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
      3 /* Optimized string comparison.
      4    Copyright (C) 2001-2002, 2007 Free Software Foundation, Inc.
      5 
      6    This program is free software: you can redistribute it and/or modify it
      7    under the terms of the GNU General Public License as published
      8    by the Free Software Foundation; either version 3 of the License, or
      9    (at your option) any later version.
     10 
     11    This program is distributed in the hope that it will be useful,
     12    but WITHOUT ANY WARRANTY; without even the implied warranty of
     13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14    Lesser General Public License for more details.
     15 
     16    You should have received a copy of the GNU General Public License
     17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
     18 
     19 /* Written by Bruno Haible <bruno (at) clisp.org>.  */
     20 
     21 #ifndef _GL_STREQ_H
     22 #define _GL_STREQ_H
     23 
     24 #include <string.h>
     25 
     26 /* STREQ allows to optimize string comparison with a small literal string.
     27      STREQ (s, "EUC-KR", 'E', 'U', 'C', '-', 'K', 'R', 0, 0, 0)
     28    is semantically equivalent to
     29      strcmp (s, "EUC-KR") == 0
     30    just faster.  */
     31 
     32 /* Help GCC to generate good code for string comparisons with
     33    immediate strings. */
     34 #if defined (__GNUC__) && defined (__OPTIMIZE__)
     35 
     36 static inline int
     37 streq9 (const char *s1, const char *s2)
     38 {
     39   return strcmp (s1 + 9, s2 + 9) == 0;
     40 }
     41 
     42 static inline int
     43 streq8 (const char *s1, const char *s2, char s28)
     44 {
     45   if (s1[8] == s28)
     46     {
     47       if (s28 == 0)
     48         return 1;
     49       else
     50         return streq9 (s1, s2);
     51     }
     52   else
     53     return 0;
     54 }
     55 
     56 static inline int
     57 streq7 (const char *s1, const char *s2, char s27, char s28)
     58 {
     59   if (s1[7] == s27)
     60     {
     61       if (s27 == 0)
     62         return 1;
     63       else
     64         return streq8 (s1, s2, s28);
     65     }
     66   else
     67     return 0;
     68 }
     69 
     70 static inline int
     71 streq6 (const char *s1, const char *s2, char s26, char s27, char s28)
     72 {
     73   if (s1[6] == s26)
     74     {
     75       if (s26 == 0)
     76         return 1;
     77       else
     78         return streq7 (s1, s2, s27, s28);
     79     }
     80   else
     81     return 0;
     82 }
     83 
     84 static inline int
     85 streq5 (const char *s1, const char *s2, char s25, char s26, char s27, char s28)
     86 {
     87   if (s1[5] == s25)
     88     {
     89       if (s25 == 0)
     90         return 1;
     91       else
     92         return streq6 (s1, s2, s26, s27, s28);
     93     }
     94   else
     95     return 0;
     96 }
     97 
     98 static inline int
     99 streq4 (const char *s1, const char *s2, char s24, char s25, char s26, char s27, char s28)
    100 {
    101   if (s1[4] == s24)
    102     {
    103       if (s24 == 0)
    104         return 1;
    105       else
    106         return streq5 (s1, s2, s25, s26, s27, s28);
    107     }
    108   else
    109     return 0;
    110 }
    111 
    112 static inline int
    113 streq3 (const char *s1, const char *s2, char s23, char s24, char s25, char s26, char s27, char s28)
    114 {
    115   if (s1[3] == s23)
    116     {
    117       if (s23 == 0)
    118         return 1;
    119       else
    120         return streq4 (s1, s2, s24, s25, s26, s27, s28);
    121     }
    122   else
    123     return 0;
    124 }
    125 
    126 static inline int
    127 streq2 (const char *s1, const char *s2, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
    128 {
    129   if (s1[2] == s22)
    130     {
    131       if (s22 == 0)
    132         return 1;
    133       else
    134         return streq3 (s1, s2, s23, s24, s25, s26, s27, s28);
    135     }
    136   else
    137     return 0;
    138 }
    139 
    140 static inline int
    141 streq1 (const char *s1, const char *s2, char s21, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
    142 {
    143   if (s1[1] == s21)
    144     {
    145       if (s21 == 0)
    146         return 1;
    147       else
    148         return streq2 (s1, s2, s22, s23, s24, s25, s26, s27, s28);
    149     }
    150   else
    151     return 0;
    152 }
    153 
    154 static inline int
    155 streq0 (const char *s1, const char *s2, char s20, char s21, char s22, char s23, char s24, char s25, char s26, char s27, char s28)
    156 {
    157   if (s1[0] == s20)
    158     {
    159       if (s20 == 0)
    160         return 1;
    161       else
    162         return streq1 (s1, s2, s21, s22, s23, s24, s25, s26, s27, s28);
    163     }
    164   else
    165     return 0;
    166 }
    167 
    168 #define STREQ(s1,s2,s20,s21,s22,s23,s24,s25,s26,s27,s28) \
    169   streq0 (s1, s2, s20, s21, s22, s23, s24, s25, s26, s27, s28)
    170 
    171 #else
    172 
    173 #define STREQ(s1,s2,s20,s21,s22,s23,s24,s25,s26,s27,s28) \
    174   (strcmp (s1, s2) == 0)
    175 
    176 #endif
    177 
    178 #endif /* _GL_STREQ_H */
    179