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comparison packages/redboot/current/src/parse.c @ 183:9160a8005d76

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Merge from eCos master repository on 2001-09-12-03:52:30-BST
author jlarmour
date Wed, 12 Sep 2001 04:21:13 +0000
parents f62680ef1804
children ea3f0bd33a73
comparison
equal deleted inserted replaced
182:f62680ef1804 183:9160a8005d76
54 extern struct cmd __RedBoot_CMD_TAB__[], __RedBoot_CMD_TAB_END__; 54 extern struct cmd __RedBoot_CMD_TAB__[], __RedBoot_CMD_TAB_END__;
55 55
56 // 56 //
57 // Scan through an input line and break it into "arguments". These 57 // Scan through an input line and break it into "arguments". These
58 // are space delimited strings. Return a structure which points to 58 // are space delimited strings. Return a structure which points to
59 // the strings, similar to a Unix program. 59 // the strings, similar to a Unix program. Multiple commands in the line
60 // are separated by ; similar to sh. If we find a semi we stop processing the
61 // line, terminate the current command with a null and return the start
62 // of the next command in *line. parse() can then be called again to
63 // process the next command on the line.
60 // Note: original input is destroyed by replacing the delimiters with 64 // Note: original input is destroyed by replacing the delimiters with
61 // null ('\0') characters for ease of use. 65 // null ('\0') characters for ease of use.
62 // 66 //
63 struct cmd * 67 struct cmd *
64 parse(char *line, int *argc, char **argv) 68 parse(char **line, int *argc, char **argv)
65 { 69 {
66 char *cp = line; 70 char *cp = *line;
67 char *pp; 71 char *pp;
68 int indx = 0; 72 int indx = 0;
73 int semi = 0;
69 74
70 while (*cp) { 75 while (*cp) {
71 // Skip leading spaces 76 // Skip leading spaces
72 while (*cp && *cp == ' ') cp++; 77 while (*cp && *cp == ' ') cp++;
73 if (!*cp) { 78 if (!*cp) {
74 break; // Line ended with a string of spaces 79 break; // Line ended with a string of spaces
75 } 80 }
81 if (*cp == ';') {
82 *cp = '\0';
83 semi=1;
84 break;
85 }
76 if (indx < MAX_ARGV) { 86 if (indx < MAX_ARGV) {
77 argv[indx++] = cp; 87 argv[indx++] = cp;
78 } else { 88 } else {
79 diag_printf("Too many arguments - stopped at: '%s'\n", cp); 89 diag_printf("Too many arguments - stopped at: '%s'\n", cp);
80 } 90 }
81 while (*cp) { 91 while (*cp) {
82 if (*cp == ' ') { 92 if (*cp == ' ') {
83 *cp++ = '\0'; 93 *cp++ = '\0';
84 break; 94 break;
85 } else if (*cp == '"') { 95 } else if (*cp == ';') {
96 break;
97 } else if (*cp == '"') {
86 // Swallow quote, scan till following one 98 // Swallow quote, scan till following one
87 if (argv[indx-1] == cp) { 99 if (argv[indx-1] == cp) {
88 argv[indx-1] = ++cp; 100 argv[indx-1] = ++cp;
89 } 101 }
90 pp = cp; 102 pp = cp;
105 } 117 }
106 } else { 118 } else {
107 cp++; 119 cp++;
108 } 120 }
109 } 121 }
122 }
123 if (semi) {
124 *line = cp + 1;
125 } else {
126 *line = cp;
110 } 127 }
111 *argc = indx; 128 *argc = indx;
112 return cmd_search(__RedBoot_CMD_TAB__, &__RedBoot_CMD_TAB_END__, argv[0]); 129 return cmd_search(__RedBoot_CMD_TAB__, &__RedBoot_CMD_TAB_END__, argv[0]);
113 } 130 }
114 131