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#include "spm.h"
char *version_suffix_get_alpha(char *str) {
size_t i;
size_t len = strlen(str);
for (i = 0; i < len; i++) {
// return pointer to the first alphabetic character we find
if (isalpha(str[i])) {
return &str[i];
}
}
return NULL;
}
char *version_suffix_get_modifier(char *str) {
size_t i;
char *modifiers[] = {
"rc",
"pre",
"dev",
"post",
NULL,
};
for (i = 0; i < strlen(str); i++) {
for (int m = 0; modifiers[m] != NULL; m++) {
if (strncasecmp(&str[i], modifiers[m], strlen(modifiers[m])) == 0) {
return &str[i];
}
}
}
return NULL;
}
int64_t version_suffix_modifier_calc(char *str) {
int64_t result = 0;
char *tmp_s = str;
if (strncasecmp(str, "rc", 2) == 0) {
// do rc
tmp_s += strlen("rc");
if (isdigit(*tmp_s)) {
result -= atoi(tmp_s);
}
else {
result -= 1;
}
}
else if (strncasecmp(str, "pre", 3) == 0) {
// do pre
tmp_s += strlen("pre");
if (isdigit(*tmp_s)) {
result -= atoi(tmp_s);
}
else {
result -= 1;
}
}
else if (strncasecmp(str, "dev", 3) == 0) {
// do dev
tmp_s += strlen("dev");
if (isdigit(*tmp_s)) {
result -= atoi(tmp_s);
}
else {
result -= 1;
}
}
else if (strncasecmp(str, "post", 4) == 0) {
// do post
tmp_s += strlen("post");
if (isdigit(*tmp_s)) {
result += atoi(tmp_s);
}
else {
result += 1;
}
}
return result;
}
int version_suffix_alpha_calc(char *str) {
if (version_suffix_get_modifier(str) != NULL) {
return 0;
}
int x = 0;
char chs[255];
char *ch = chs;
memset(chs, '\0', sizeof(chs));
strncpy(chs, str, strlen(str));
// Convert character to hex-ish
x = (*ch - 'a') + 0xa;
// Ensure the string ends with a digit
if (strlen(str) == 1) {
strcat(ch, "0");
}
// Convert trailing numerical value to an integer
while (*ch != '\0') {
if (!isdigit(*ch)) {
ch++;
continue;
}
x += atoi(ch);
break;
}
return x;
}
int64_t version_from(const char *version_str) {
const char *delim = ".";
int64_t result = 0;
int seen_alpha = 0; // Does the tail contain a single character, but not a modifier?
int seen_modifier = 0; // Does the tail contain "rc", "dev", "pre", and so forth?
char head[255]; // digits of the string
char tail[255]; // alphabetic characters of the string
char *suffix_alpha = NULL; // pointer to location of the first character after the version
char *suffix_modifier = NULL; // pointer to location of the modifier after the version
char *x = NULL; // pointer to each string delimited by "."
char *vstr = calloc(strlen(version_str) + 1, sizeof(char));
if (!vstr) {
perror("Version string copy");
return -1;
}
memset(head, '\0', sizeof(head));
memset(tail, '\0', sizeof(tail));
strncpy(vstr, version_str, strlen(version_str));
// Split the version into parts
while ((x = strsep(&vstr, delim)) != NULL) {
int64_t tmp = 0;
// populate the head (numeric characters)
strncpy(head, x, strlen(x));
for (int i = 0; i < strlen(head); i++) {
if (isalpha(head[i])) {
// populate the tail (alphabetic characters)
strncpy(tail, &head[i], strlen(&head[i]));
head[i] = '\0';
break;
}
}
// Detect alphabetic suffix
if (!seen_alpha) {
if ((suffix_alpha = version_suffix_get_alpha(x)) != NULL) {
seen_alpha = 1;
}
}
// Detect modifier suffix
if (!seen_modifier) {
if ((suffix_modifier = version_suffix_get_modifier(x)) != NULL) {
seen_modifier = 1;
}
}
// Stop processing if the head starts with something other than numbers
if (!isdigit(head[0])) {
break;
}
// Convert the head to an integer
tmp = atoi(head);
// Update result. Each portion of the numeric version is its own byte
// Version PARTS are limited to 255
result = result << 8 | tmp;
}
if (suffix_alpha != NULL) {
// Convert the alphabetic suffix to an integer
int64_t sac = version_suffix_alpha_calc(suffix_alpha);
result += sac;
}
if (suffix_modifier != NULL) {
// Convert the modifier string to an integer
int64_t smc = version_suffix_modifier_calc(suffix_modifier);
if (smc < 0) {
result -= ~smc + 1;
}
else {
result += smc;
}
}
free(vstr);
return result;
}
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