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comparison Python/getargs.c @ 17997:27f2422ea335 legacy-trunk

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Change cascaded if stmts to switch stmt in vgetargs1(). In the default branch, keep three ifs that are used if level == 0, the most common case. Note that first if here is a slight optimization for the 'O' format. Second part of SF patch 426072.
author Jeremy Hylton <jeremy@alum.mit.edu>
date Tue, 29 May 2001 17:46:19 +0000
parents 5a9debb14440
children 9b291ca6546c
comparison
equal deleted inserted replaced
17996:5a9debb14440 17997:27f2422ea335
78 char *fname = NULL; 78 char *fname = NULL;
79 char *message = NULL; 79 char *message = NULL;
80 int min = -1; 80 int min = -1;
81 int max = 0; 81 int max = 0;
82 int level = 0; 82 int level = 0;
83 int endfmt = 0;
83 char *formatsave = format; 84 char *formatsave = format;
84 int i, len; 85 int i, len;
85 char *msg; 86 char *msg;
86 87
87 assert(compat || (args != (PyObject*)NULL)); 88 assert(compat || (args != (PyObject*)NULL));
88 89
89 for (;;) { 90 while (endfmt == 0) {
90 int c = *format++; 91 int c = *format++;
91 if (c == '(' /* ')' */) { 92 switch (c) {
93 case '(':
92 if (level == 0) 94 if (level == 0)
93 max++; 95 max++;
94 level++; 96 level++;
95 } 97 break;
96 else if (/* '(' */ c == ')') { 98 case ')':
97 if (level == 0) 99 if (level == 0)
98 Py_FatalError(/* '(' */ 100 Py_FatalError("excess ')' in getargs format");
99 "excess ')' in getargs format");
100 else 101 else
101 level--; 102 level--;
102 } 103 break;
103 else if (c == '\0') 104 case '\0':
104 break; 105 endfmt = 1;
105 else if (c == ':') { 106 break;
107 case ':':
106 fname = format; 108 fname = format;
107 break; 109 endfmt = 1;
108 } 110 break;
109 else if (c == ';') { 111 case ';':
110 message = format; 112 message = format;
111 break; 113 endfmt = 1;
112 } 114 break;
113 else if (level != 0) 115 default:
114 ; /* Pass */ 116 if (level == 0) {
115 else if (c == 'e') 117 if (c == 'O')
116 ; /* Pass */ 118 max++;
117 else if (isalpha(c)) 119 else if (isalpha(c)) {
118 max++; 120 if (c != 'e') /* skip encoded */
119 else if (c == '|') 121 max++;
120 min = max; 122 } else if (c == '|')
123 min = max;
124 }
125 break;
126 }
121 } 127 }
122 128
123 if (level != 0) 129 if (level != 0)
124 Py_FatalError(/* '(' */ "missing ')' in getargs format"); 130 Py_FatalError(/* '(' */ "missing ')' in getargs format");
125 131