diff options
Diffstat (limited to 'src/output.cc')
| -rw-r--r-- | src/output.cc | 99 |
1 files changed, 93 insertions, 6 deletions
diff --git a/src/output.cc b/src/output.cc index 484d583..3a23647 100644 --- a/src/output.cc +++ b/src/output.cc @@ -230,6 +230,42 @@ Output::output_constants (struct Output_Constants& style) const /* ------------------------------------------------------------------------- */ +/* We use a downcase table because when called repeatedly, the code + gperf_downcase[c] + is faster than + if (c >= 'A' && c <= 'Z') + c += 'a' - 'A'; + */ +#define USE_DOWNCASE_TABLE 1 + +#if USE_DOWNCASE_TABLE + +/* Output gperf's ASCII-downcase table. */ + +static void +output_upperlower_table () +{ + unsigned int c; + + printf ("#ifndef GPERF_DOWNCASE\n" + "#define GPERF_DOWNCASE 1\n" + "static unsigned char gperf_downcase[256] =\n" + " {"); + for (c = 0; c < 256; c++) + { + if ((c % 15) == 0) + printf ("\n "); + printf (" %3d", c >= 'A' && c <= 'Z' ? c + 'a' - 'A' : c); + if (c < 255) + printf (","); + } + printf ("\n" + " };\n" + "#endif\n\n"); +} + +#endif + /* Output gperf's ASCII-case insensitive strcmp replacement. */ static void @@ -250,6 +286,18 @@ output_upperlower_strcmp () option[ANSIC] | option[CPLUSPLUS] ? "(register const char *s1, register const char *s2)\n" : ""); + #if USE_DOWNCASE_TABLE + printf ("{\n" + " for (;;)\n" + " {\n" + " unsigned char c1 = gperf_downcase[(unsigned char)*s1++];\n" + " unsigned char c2 = gperf_downcase[(unsigned char)*s2++];\n" + " if (c1 != 0 && c1 == c2)\n" + " continue;\n" + " return (int)c1 - (int)c2;\n" + " }\n" + "}\n"); + #else printf ("{\n" " for (;;)\n" " {\n" @@ -263,8 +311,9 @@ output_upperlower_strcmp () " continue;\n" " return (int)c1 - (int)c2;\n" " }\n" - "}\n" - "#endif\n\n"); + "}\n"); + #endif + printf ("#endif\n\n"); } /* Output gperf's ASCII-case insensitive strncmp replacement. */ @@ -289,6 +338,22 @@ output_upperlower_strncmp () option[ANSIC] | option[CPLUSPLUS] ? "(register const char *s1, register const char *s2, register unsigned int n)\n" : ""); + #if USE_DOWNCASE_TABLE + printf ("{\n" + " for (; n > 0;)\n" + " {\n" + " unsigned char c1 = gperf_downcase[(unsigned char)*s1++];\n" + " unsigned char c2 = gperf_downcase[(unsigned char)*s2++];\n" + " if (c1 != 0 && c1 == c2)\n" + " {\n" + " n--;\n" + " continue;\n" + " }\n" + " return (int)c1 - (int)c2;\n" + " }\n" + " return 0;\n" + "}\n"); + #else printf ("{\n" " for (; n > 0;)\n" " {\n" @@ -306,8 +371,9 @@ output_upperlower_strncmp () " return (int)c1 - (int)c2;\n" " }\n" " return 0;\n" - "}\n" - "#endif\n\n"); + "}\n"); + #endif + printf ("#endif\n\n"); } /* Output gperf's ASCII-case insensitive memcmp replacement. */ @@ -332,6 +398,22 @@ output_upperlower_memcmp () option[ANSIC] | option[CPLUSPLUS] ? "(register const char *s1, register const char *s2, register unsigned int n)\n" : ""); + #if USE_DOWNCASE_TABLE + printf ("{\n" + " for (; n > 0;)\n" + " {\n" + " unsigned char c1 = gperf_downcase[(unsigned char)*s1++];\n" + " unsigned char c2 = gperf_downcase[(unsigned char)*s2++];\n" + " if (c1 == c2)\n" + " {\n" + " n--;\n" + " continue;\n" + " }\n" + " return (int)c1 - (int)c2;\n" + " }\n" + " return 0;\n" + "}\n"); + #else printf ("{\n" " for (; n > 0;)\n" " {\n" @@ -349,8 +431,9 @@ output_upperlower_memcmp () " return (int)c1 - (int)c2;\n" " }\n" " return 0;\n" - "}\n" - "#endif\n\n"); + "}\n"); + #endif + printf ("#endif\n\n"); } /* ------------------------------------------------------------------------- */ @@ -1903,6 +1986,10 @@ Output::output () if (option[UPPERLOWER]) { + #if USE_DOWNCASE_TABLE + output_upperlower_table (); + #endif + if (option[LENTABLE]) output_upperlower_memcmp (); else |