Mercurial > repos > blastem

comparison util.c @ 1292:5905593d6828

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Allow initial_path to contain variable references which allows the default value to be actually specified in the default config file
author Michael Pavone <pavone@retrodev.com>
date Tue, 21 Mar 2017 00:40:25 -0700
parents a344885e7c79
children 96ad1b9bbb3a
comparison
equal deleted inserted replaced
1291:f17fe0d00626 1292:5905593d6828
53 *ret = 0; 53 *ret = 0;
54 for (int i = 0; i < num_parts; i++) { 54 for (int i = 0; i < num_parts; i++) {
55 strcat(ret, parts[i]); 55 strcat(ret, parts[i]);
56 } 56 }
57 return ret; 57 return ret;
58 }
59
60 typedef struct {
61 uint32_t start;
62 uint32_t end;
63 char *value;
64 } var_pos;
65
66 char *replace_vars(char *base, tern_node *vars, uint8_t allow_env)
67 {
68 uint32_t num_vars = 0;
69 for (char *cur = base; *cur; ++cur)
70 {
71 //TODO: Support escaping $ and allow brace syntax
72 if (*cur == '$') {
73 num_vars++;
74 }
75 }
76 var_pos *positions = calloc(num_vars, sizeof(var_pos));
77 num_vars = 0;
78 uint8_t in_var = 0;
79 uint32_t max_var_len = 0;
80 for (char *cur = base; *cur; ++cur)
81 {
82 if (in_var) {
83 if (!(*cur == '_' || isalnum(*cur))) {
84 positions[num_vars].end = cur-base;
85 if (positions[num_vars].end - positions[num_vars].start > max_var_len) {
86 max_var_len = positions[num_vars].end - positions[num_vars].start;
87 }
88 num_vars++;
89 in_var = 0;
90 }
91 } else if (*cur == '$') {
92 positions[num_vars].start = cur-base+1;
93 in_var = 1;
94 }
95 }
96 if (in_var) {
97 positions[num_vars].end = strlen(base);
98 if (positions[num_vars].end - positions[num_vars].start > max_var_len) {
99 max_var_len = positions[num_vars].end - positions[num_vars].start;
100 }
101 num_vars++;
102 }
103 char *varname = malloc(max_var_len+1);
104 uint32_t total_len = 0;
105 uint32_t cur = 0;
106 for (uint32_t i = 0; i < num_vars; i++)
107 {
108 total_len += (positions[i].start - 1) - cur;
109 cur = positions[i].start;
110 memcpy(varname, base + positions[i].start, positions[i].end-positions[i].start);
111 varname[positions[i].end-positions[i].start] = 0;
112 positions[i].value = tern_find_ptr(vars, varname);
113 if (!positions[i].value && allow_env) {
114 positions[i].value = getenv(varname);
115 }
116 if (positions[i].value) {
117 total_len += strlen(positions[i].value);
118 }
119 }
120 total_len += strlen(base+cur);
121 free(varname);
122 char *output = malloc(total_len+1);
123 cur = 0;
124 char *curout = output;
125 for (uint32_t i = 0; i < num_vars; i++)
126 {
127 if (positions[i].start-1 > cur) {
128 memcpy(curout, base + cur, (positions[i].start-1) - cur);
129 curout += (positions[i].start-1) - cur;
130 }
131 if (positions[i].value) {
132 strcpy(curout, positions[i].value);
133 curout += strlen(curout);
134 }
135 cur = positions[i].end;
136 };
137 if (base[cur]) {
138 strcpy(curout, base+cur);
139 } else {
140 *curout = 0;
141 }
142 free(positions);
143 return output;
58 } 144 }
59 145
60 void byteswap_rom(int filesize, uint16_t *cart) 146 void byteswap_rom(int filesize, uint16_t *cart)
61 { 147 {
62 for(uint16_t *cur = cart; cur - cart < filesize/2; ++cur) 148 for(uint16_t *cur = cart; cur - cart < filesize/2; ++cur)