67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/*
|
|
* vim:ts=4:sw=4:expandtab
|
|
*
|
|
* i3 - an improved dynamic tiling window manager
|
|
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
|
|
*
|
|
*/
|
|
#include "libi3.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#ifndef CS_STARTS_WITH
|
|
#define CS_STARTS_WITH(string, needle) (strncmp((string), (needle), strlen((needle))) == 0)
|
|
#endif
|
|
|
|
/*
|
|
* Replaces occurrences of the defined placeholders in the format string.
|
|
*
|
|
*/
|
|
char *format_placeholders(char *format, placeholder_t *placeholders, int num) {
|
|
if (format == NULL)
|
|
return NULL;
|
|
|
|
/* We have to first iterate over the string to see how much buffer space
|
|
* we need to allocate. */
|
|
int buffer_len = strlen(format) + 1;
|
|
for (char *walk = format; *walk != '\0'; walk++) {
|
|
for (int i = 0; i < num; i++) {
|
|
if (!CS_STARTS_WITH(walk, placeholders[i].name))
|
|
continue;
|
|
|
|
buffer_len = buffer_len - strlen(placeholders[i].name) + strlen(placeholders[i].value);
|
|
walk += strlen(placeholders[i].name) - 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Now we can parse the format string. */
|
|
char buffer[buffer_len];
|
|
char *outwalk = buffer;
|
|
for (char *walk = format; *walk != '\0'; walk++) {
|
|
if (*walk != '%') {
|
|
*(outwalk++) = *walk;
|
|
continue;
|
|
}
|
|
|
|
bool matched = false;
|
|
for (int i = 0; i < num; i++) {
|
|
if (!CS_STARTS_WITH(walk, placeholders[i].name)) {
|
|
continue;
|
|
}
|
|
|
|
matched = true;
|
|
outwalk += sprintf(outwalk, "%s", placeholders[i].value);
|
|
walk += strlen(placeholders[i].name) - 1;
|
|
break;
|
|
}
|
|
|
|
if (!matched)
|
|
*(outwalk++) = *walk;
|
|
}
|
|
|
|
*outwalk = '\0';
|
|
return sstrdup(buffer);
|
|
}
|